Calculate IDMT Over Current Relay PSM. If the main relay does not operated and send a trip signal then backup overcurrent relay must operate and send. Date Code: 20190508. As you can see, simplified short circuit fault calculations can be performed using a basic understanding of sources of fault power and current and impedance values that impede the short circuit power flow. com Blogger 43 1 25 tag:blogger. Type CDG 31 is a triple pole version of the type CDG 11 with three overcurrent units or two overcurrent units and one earthfault unit in the centre. Thompson and Daniel L. REXA103 - Auto Re-Closure. doc), PDF File (. 39984912-Setting-Calculation-Protocol-for-IDMT-Over-Current-Relay. It is designed to work in Mozilla Firefox 6. txt) or read online for free. Heidfeld, Schweitzer Engineering Laboratories, Inc. Calculate IDMT over Current Relay. This tutorial demonstrates how to add new models and TCC curves to the overcurrent. They are provided by the manufacturers of circuit protection devices to assist users with selecting devices that provide proper equipment protection and performance, while avoiding nuisance tripping. This thesis documents the demonstration approach to set the SEL 387 relay to protect a grounded wye-grounded wye transformer and then test these settings by injecting fault currents into the relay using the SEL AMS. Basic principles of Distance protection. 3) Develope modbus tcp client program HMI graphic interface using C/C++ programing language. Calculate Actual Operating time according to Various IES Curve. A zero-sequence overcurrent relay simply measures the sum of the three phase currents (Equation 1). Protective Device Coordination & Selectivity StarView Toolbar Protective Device HandlingCapabilities • High impendence & percentage differential relay (87) • Phase, ground, & directional overcurrent relay (51/50, 67)• A C & DC coordination • Detailed implementation of voltage restraint & control relay (51V)• A NSI & IEC coordination. Conversion of TMS (Time Multiplier Setting) to Time delay (seconds):. Reads relaying 3-line diagrams. 132kV Power Transformer & Line Protection Relay Settings 0. pdf), Text File (. Sample calculation-for-differential-relays 1. txt) or view presentation slides online. 50Q –Instantaneous Negative Sequence overcurrent relay. This guarantees discrimination, or selectivity, without further calculation because it allows short-circuit protection to be time-delayed, even at the maximum prospective short-circuit current. They also protect circuits downstream from the transformer. frequencies should be checked to ensure proper operation at frequencies below 60 Hz. When there is a short circuit the resistance becomes very small, and that means the current becomes very large. Demonstrate multiple techniques to test relays, so that when one thing doesn't work, you can quickly move on to the next and keep the testing process moving along. Short circuit calculations are required for the application and coordination of protective relays and the rating of equipment. To find more books about overcurrent relay setting calculation, you can use related keywords : Overcurrent Relay Setting Calculation Xls, overcurrent relay setting calculation, Overcurrent Relay Setting Calculation Example, relay setting calculation, relay setting calculation example, protective relay setting calculation, Siemens Relay Setting Calculation, micom relay setting calculation, Idmt. Time Overcurrent Relays Time overcurrent relays operate with a time delay. Introduction. Overcurrent Coordination Page 2 Qual-Tech Engineers, Inc. Vista Overcurrent Control 2. Stator ground over current (Low, Med Z Gnd, Neutral CT of flux summatin CT) 25 Synchronism check 51GN, 51N Stator ground over current (High Z gnd) 32 Reverse power (one stage) 51VC Voltage controlled overcurrent 32-1 Reverse power, Non electrical trip supervision 51VR Voltage restrained overcurrent 40 Loss of field (Var flow approach) 59N, 27-3N,. You can use combinations of curve types to achieve the design requirements. The unit mounts on the desk area of the Protection and Relay Test Set or other Power System product. Relay A: Current setting=1000 A; TMS=0. Good knowledge in IEC61850 (GOOSE, MMS). Purpose and Implementation Voltage Supervised Overcurrent Relays Distance Relays. pdf), Text File (. Base MVA=100 Fault MVA=1200 Source impedance=0. 140M – C 2 E – A63 – KN – CC – GJ abcd ef gh ab c d Bulletin Number Frame/Rating Interrupting Rating/Breaking Capacity Protection Type. A Technical Reference Document Power Plant and Transmission System Protection Coordination Draft 6. Looking for a proficient ETAP designer to develop a protection system. Sebelum kita membahas lebih jauh, kita ingat lagi formula untuk ketiga kurva tersebut yang pernah dibahas pada Standar IDMT untuk Relay Overcurrent (Arus lebih) sbb : Dari postingan sebelumnya , telah diketahui bahwa Is merupakan arus yang disetting, I adalah arus yang terukur dan TMS adalah waktu perkalian yang disetting. This guarantees discrimination, or selectivity, without further calculation because it allows short-circuit protection to be time-delayed, even at the maximum prospective short-circuit current. Technical Support Centers: United States and the Americas: Voice Mail: 1 800 282 9855: Phone: 011 421 33 790 2910: Hours: M-F, 9:00AM - 5:00PM MST (GMT -07:00). 5A Where the overload relay selected is not sufficient to start the motor or carry the load, the next- higher-size overload relay shall be permitted to be used. Abstract—Setting transmission line relays is fairly easy to learn—but takes years to master. Electrical motor loads are calculated from power in kW and full rated load in kW. Here the time period is the total time it takes to complete one on/off cycle (T 1 +T 2), while Duty cycle is the percentage of total time for which the. Import Toshiba GRL100 relay settings from relay setting data file, that is exported from the manufacturer relay management software in CSV format. The MATLAB/Simulink model of numerical relay for overcurrent protection is shown in Figure 5 [8], [9]. For motors with a service factor of not less than 1. PROJECT NUMBER 5e. Overload relay is the one of important device for motor control. The differential relay works on the principle of comparison between the phase angle and magnitude of two or more similar electrical quantities. and appropriately. REXA103 - Auto Re-Closure. Download OVERVIEW OF RELAY COORDINATION Relay coordination has to be carried out based on many other power system studies and Equipment Sizing calculation, are listed below Load Flow Studies Short Circuit Studies Motor Starting Studie Technical engineering Articles Zone4engineer. When addressing the problem of calculating the settings for directional overcurrent elements, the focus is usually the determination of the pickup, time dial and operating characteristic, in order to ensure proper selectivity with adjacent protection elements, thus limiting the problem related to the settings calculation of the direction determination characteristic to the application of. However, this isn't usually the best choice for motors. SEL-487B and SEL-751A. This paper will discuss methods to improve the coordination of overcurrent relays when faced with significant CT saturation. Relay Setting Test Current (Amp) Trip Time in Seconds i-t characteristics. A zero-sequence overcurrent relay simply measures the sum of the three phase currents (Equation 1). This setting is primarily needed to prevent operation of relay in case of through fault results saturation of CTs causes a transient differential current to be detected by the relay. (1) Cable Size & Voltage Drop Calculation (1. xls), PDF File (. How to Buy Electrical Panels An electrical panel, also known as a breaker panel, load center, service panel or breaker box, is a steel box that holds multiple circuit breakers wired to circuits that distribute power throughout your home. The different relays used normally in a 33/11 kV sub-station are earth fault relay, and over-current relay. 16 Calculate Street Light Pole Distance &Watt Area 302. 51P1T Phase Time-Overcurrent Element Curve Timing and Reset Timing 51P1P 51P1C 51P1TD 51P1RS 51P1CT 51P1MR Settings Relay Word Bits 51P1P 51P1T 51P1R Controls the Torque Control Switch. A Technical Reference Document Power Plant and Transmission System Protection Coordination Draft 6. Yet, some relays are simply set in terms positive-sequence impedance Z1 (magnitude and angle) and zero-sequence impedance Z0 (magnitude and angle). Standards such as ANSI C37. The optimal setting of the directional over current relays is obtained using a meta-heuristic based optimization algorithm. Learn more. Overcurrent Coordination Page 2 Qual-Tech Engineers, Inc. Short-circuit current calculations and relay settings calculation manually or by Software (ETAP, EnergyCS). Principal Protection Engineer APPLY FOR THIS JOB RLC Engineering is seeking a Principal Protection Engineer to join their team of professionals. blog, IT, 전기전자, 가스, 블로그 Unknown [email protected] • Numerical relays determine direction by logic. The current pickup establishes the sensitivity. • Mechanical and solid state relays determine direction by connection. Sebelum kita membahas lebih jauh, kita ingat lagi formula untuk ketiga kurva tersebut yang pernah dibahas pada Standar IDMT untuk Relay Overcurrent (Arus lebih) sbb : Dari postingan sebelumnya , telah diketahui bahwa Is merupakan arus yang disetting, I adalah arus yang terukur dan TMS adalah waktu perkalian yang disetting. txt) or view presentation slides online. So this REF relay will not be actuated for external earth fault. 💎 Updating and modifing Relay Settings are also very easy and fast. Many relays use an electromagnet to mechanically operate a switch, but other operating principles are also used, such as solid-state relays. Protective Relaying Philosophy and Design Guidelines. 8 , Overload Relay of Starter is Put before Motor. Heidfeld, Schweitzer Engineering Laboratories, Inc. Fault Current Calculations. Terms Used by Power System Protection Engineers, IEEE Catalog Number TP130-0-031998-1-0, ©1998. Feeder terminal REF 543 The REF 543 feeder terminal is designed for protection, control, measurement and supervision in medium voltage networks The REF 543 feeder terminal can be used with different kinds of switchgear, including single busbar, double busbar and duplex systems. 10 Overcurrent Modeling 46 CHAPTER 4 RESULTS AND ANALYSIS 3. Time in seconds. Since some relays are frequency-sensitive, each of the relay's operating characteristics vs. 13 CT and VT settings page 47 3. 732*6 =14 KA. View 39984912-Setting-Calculation-Protocol-for-IDMT-Over-Current-Relay from SING 007 at Englishville School. XLS TRANSFORMER IDMT RELAY SETTING (10. Discharging current is positive. The relay shown in figure is used for cable differential purpose. simpan Simpan Setting Calculation Protocol for IDMT Over Current Untuk Nanti. This functionality is the technological basis of the Protection Testing Library (PTL), a comprehensive test template library for a wide range of protection relays. Instantaneous over current (50) elements have only one setting: the pickup current. Time-Current Curves Fuses 800 A Fuse Rating What would cause a STPU Setting Time-Current Curves Circuit Breakers Cargill Electrical Team Meeting 24. As a consequence,. Short-circuit current calculations and relay settings calculation manually or by Software (ETAP, EnergyCS). Time Overcurrent The principle of time overcurrent protection is that relays are applied appropriately at the terminals of zones, and each relay is then given both a current pickup and a time delay setting. Industrial & lab equipment Measuring, testing & control SEL-700G Generator and Intertie Protection Relays Instruction Manual. The current pickup establishes the sensitivity. Time-Current Curves Fuses 14. There are five different types of time over-current relays. You can also calculate the minimum circuit breaker size for the given load. 5 Universal microprocessor overcurrent relay 147. A few other settings were used in the analysis such as the ground time overcurrent pickup, the ground instantaneous overcurrent pickup, and phase distance reaches. 5 shows a generic trip curve for Micrologic 5. These short circuit studies are performed using power system software as per IEEE standards. relay solution in power plants sold by Wärtsilä, Wärtsilä required a user guide, adapted for their purposes, for ABB’s REG670 generator protection relay to be used by field service en- gineers on power plant sites for the commissioning. Fundamentals of Calculating Short-Circuit Current Everything you need to know about calculating fault currents, you learned in circuits 101, trigonometry, and basic math classes. Calculate Actual Operating time according to Various IES Curve. The directional overcurrent relay is similar to the distance relay in that it makes a decision on fault direction through the measurement of local loop voltages and currents. All You Need to Know About a Relays: What is a Relay?A relay is an electrically operated switch. The relay is housed in a robust enclosure with carrying handle. Keywords : Inverse definite minimum time, overcurrent relay, discrimination time in terval, setting current and time multiplier setting. Distance Protection, Differential Transformer, Busbar and Line Protection, Teleprotection, Overcurrent and Earthfault, Voltage Protection. As a consequence,. Step-3 Now we have to calculate PSM for the specified faulty current level. 3 (B), NEC 240. pickup current of an overcurrent relay is the minimum value of current that will cause the relay to close its contacts. This spreadsheet allows you to enter values for vessel and liquid parameters, and then it calculates the necessary transmitter range values. XLS SHORT CIRCUIT CALCULATION (10. Calculate the temperature rise in deg F = 80 – 60 = 20 deg F; Need 48 hours to heat swimming pool. Overcurrent Relay 67 - AC Directional Overcurrent Relay. Section of coordinated downstream trip units, load calculations, cable sizing to suit breaker/ relay/ trip unit selected and single point of failure analysis. It can prevent our motor from overheat or winding burning due overload of ampere. Based on the relay operating characteristics, overcurrent relays can be classified into three groups: definite current, definite time and inverse time. Use the settings import tool or custom scripts and have access to relay configurations within Protection Suite. Show more Show less. UCAS connects people to University, post Uni studies including teacher training, apprenticeships & internships. Just divide by 1000 to get the voltage drop in volts. As a consequence,. Defect of remote controller wiring Defect of remote controller PCB Others: 77: System No. Find Eaton's time current curves for protective relays, fuses, loadcenters, panelboards and circuit breakers both current and vintage. 3 and NEC 240. 04 V which is equivalent to 2. Massive editorial changes. Over Current Relay Settings for Single Transformer. Ground fault protection requires the least energy to trip the circuit breaker, often times with trip values set well below the long time pickup setting. The relay with application configuration B offers, non-directional over current and earth-fault protection. com Relay-1 Relay-2 Relay-3 Relay-4 Relay-5 Feeder…. This purpose of this simulation is to give students a way to practice performing hydrostatic level measurement calculations. Feeder Ground Protection. First the starting principle is discussed along with the types of starting methods. Use settings importers to automate the population of relay settings values into your Protection Suite test plans. Arc faults are generally limited to systems where the bus voltage is in excess of 120 volts. Moreover, the proposed scheme is validated using GE Multilin, model-750/760 overcurrent relay in ETAP (industrial simulation software) on the modified IEEE 9-bus 4-DG microgrid. Overcurrent Relay Overcurrent relays are those relays that respond to current only. This guide is designed to cover the. Abstract—Setting transmission line relays is fairly easy to learn—but takes years to master. Features Time-Overcurrent Time-overcurrent units are avail-able in several ranges to meet current pickup settings of from. reclosing--effect on system stability and turbine-generator duty, high speed quay, r. thread238-307149 I hope the attached excel file will help you to get the operating current values for transformer differential protection up to 4 winding and al excel sheet to calculate all operating values for siemens transformer relay - Electric power & transmission & distribution - Eng-Tips. Import Toshiba GRL100 relay settings from relay setting data file, that is exported from the manufacturer relay management software in CSV format. For that, we have to first divide primary faulty current by CT ratio to get relay faulty current. txt) or read online for free. Actual load. The relay will operate if the current passing through the operating coil are higher than the threshold current. Moreover, the proposed scheme is validated using GE Multilin, model-750/760 overcurrent relay in ETAP (industrial simulation software) on the modified IEEE 9-bus 4-DG microgrid. TL = the relay time dial setting, I = the relay current, in multiples (per unit) of the relay nominal current (in this case, the latter will be 5 amps). This model data will be used to estimate the performance of protective relays. View 39984912-Setting-Calculation-Protocol-for-IDMT-Over-Current-Relay from SING 007 at Englishville School. This in-volv es calibrating the relays to the coordination cu rves and adjusting time dials to achieve specifi c op erating times. The relay with application configuration B offers, non-directional over current and earth-fault protection. pdf), Text File (. Heidfeld, Schweitzer Engineering Laboratories, Inc. Calculate ΔT ΔT = Tm - Ta English = 40ºF - (-20ºF) = 60ºF Metric = 4. A copy of the curve is attached (Fig 3). The relay is housed in a robust enclosure with carrying handle. N-1-1 state; therefore, this study proposes an optimal relay setting of overcurrent relays subject to N-1 and N-1-1 states. This tutorial demonstrates how to add new models and TCC curves to the overcurrent. Voltage Relay 48 - Incomplete-Sequence Relay 49 - Machine or Transformer Thermal Relay 50 - Instantaneous Overcurrent 51 - AC Inverse Time Overcurrent Relay 52 - AC Circuit Breaker 53 - Field Excitation Relay 55 - Power Factor Relay 56 - Field Application Relay. A protection approach is proposed with adaptive setting of characteristic curves for the relays that can cope with change in PV capacity. Two relays at each end of the cable separated by some distance with the communication path between the two relays so that they exchange information together. 20(A) and 215. Calculate High Current Setting(I>>) Calculate Actual…. 0 (0 ratings) Course Ratings are calculated from individual students’ ratings and a variety of other signals, like age of rating and reliability, to ensure that they reflect course quality fairly and accurately. Overcurrent relays generally have current setting multipliers ranging from 50 to 200% in steps of 25% which is referred to as plug setting (PS). This position will serve as the department's technical advisor and mentor for other Protection Engineers within the group. Calculate IDMT Over Current Relay PSM. 5 kV and below) in coordination with Meralco Distribution Offices for: - New feeders - Changes in Distribution network due to reconfiguration and embedded generation (gas, solar and wind). 8 amperes x 1. pdf), Text File (. Paithankar, Marcel Dekker , -8247-9911-9, ©1998. time-current-curves. SEL-487B and SEL-751A. The characteristic curves. It also contains equation parameters for E-speed, T-speed, Tap, Main, IEEE, and IEC curves. PROTECTION RELAY TESTING FOR COMMISSIONING SWP Check this is the latest Process Zone version before use. 1 second time margin between the curves to allow for temperature variations in the fuse. Background 2. Users can link test plans into the Extended RIO format and import relay settings. Industrial & lab equipment Measuring, testing & control SEL-700G Generator and Intertie Protection Relays Instruction Manual. A zero-sequence overcurrent relay simply measures the sum of the three phase currents (Equation 1). Figure 1 illustrates a simple single-line diagram that very well could be your basic service entrance for a commercial or industrial installation. 2 Relay Setting for Overcurrent (OIC) 36 Simulation Result 39 4. Instantaneous over current (50) elements have only one setting: the pickup current. This spreadsheet kept a record of all the substations in the network and the settings for each bay relay. Demonstrate multiple techniques to test relays, so that when one thing doesn’t work, you can quickly move on to the next and keep the testing process moving along. Transformers 5 Contact Technical Services at (800) 377-4384 with any uestions Visit our wesite at wwwsolahdcom 197 Overcurrent Protection Fusing and circuit breaker protection. The choice of Relay Class affects the calculation method. This spreadsheet was stored on a central network drive which could be accessed. Calculate IDMT Over Current Relay Time setting. R leads = 2 ρ l /a = 2 x 0. † Archiving of a project in a data fi le. Modbus and IEC60870-5-10_ (basic). The current pickup establishes the sensitivity. Earlier electro-mechanical relays were used which are now being replaced. RE: Relay Coordination Using Microsoft Excel ScottyUK (Electrical) 26 Jun 07 15:16 Years ago I put together a crude calculator in Excel to deal with the GEC relays and IIRC the Merlin Gerin ST series tripping units for their Masterpact ACBs. Determine relay type ( t ) and calculate the time of operation using the following equations(9),(10) and (11). 9 amps for amperage load and 460 volts 3 phase and power factor value is 0. All relay settings are calculated in-house. There are five different types of time over-current relays. The best method for providing overcurrent protection for most circuits is to use a circuit breaker that combines overcurrent protection with short-circuit and ground-fault protection. In both cases the residual compensation is automatically calculated internally by the relay using these set values. 9 – November 19, 2009 NERC System Protection and Control Subcommittee. Omega has everything you need to measure, monitor, and manage temperature. 2b represents the Mho relay which is inherently directional [3]. • The sub-transmission feeder overcurrent and earth fault relay settings, • The 11 kV feeder overcurrent and earth fault relay setting (relay ‘C’), • The HV overcurrent relay setting on both the 1500 and 750 kVA distribution transformers (relays ‘D1’ and ‘D2’). It also contains equation parameters for E-speed, T-speed, Tap, Main, IEEE, and IEC curves. Baby & children Computers & electronics Entertainment & hobby. txt) or read online for free. This guarantees discrimination, or selectivity, without further calculation because it allows short-circuit protection to be time-delayed, even at the maximum prospective short-circuit current. Relay Characteristics Minimum Operating Current Setting Slope Setting Sample System Differential Relay Settings CT Saturation Stabilizing Resistor Balancing Burden Time Delay Frequency Response. Setting Calculation Protocol for IDMT Over Current Relay. SEL-487B and SEL-751A. It shares the risks from fine dust exposure, how to measure your risks and how to effectively protect yourself and those close to you from airborne dust hazards. 0, though it may work with other browsers. or 5A), will be determined in the general settings of the relay. Use the settings import tool or custom scripts and have access to relay configurations within Protection Suite. Rapid-Fire Basic Knowledge. GET-2230B The Use of the R-X Diagram in Relay Work (positive torque) and 240" (negative torque). In an electric power system, overcurrent or excess current is a situation where a larger than intended electric current exists through a conductor, leading to excessive generation of heat, and the risk of fire or damage to equipment. o Configured relay settings for distance and overcurrent feeders with DGs + reclosers on 3 wire and 4 wire systems (27. Article 430-52 of the National Electrical Code specifies that the minimum motor branch-circuit size must be rated at 125 percent of the motor full-load current found in Table 430-150 for motors that operate continuously, and Section 430-32 requires that the long-time overload trip rating not be greater than 115 percent of the motor nameplate current unless the motor is marked otherwise. Capture the life cycle of protection settings and template. Circuit breakers protect transformers from overcurrent situations and short circuits. B-Always pull down the list to see your choices - sometimes the smallest is not displayed first. Experience with relay settings development of overcurrent, differential, or impedance relays Experience with ASPEN, CAPE, PSSE or other short circuit analysis software Must be proficient with typical office software such as Word, Excel, PowerPoint, Outlook and Windows. 8 , Overload Relay of Starter is Put before Motor. 8 The future of protection for distribution systems 159. 5 kV and below) in coordination with Meralco Distribution Offices for: - New feeders - Changes in Distribution network due to reconfiguration and embedded generation (gas, solar and wind). Calculate Low current Setting(I>). The calculation method and all the latest changes will be explained step-by-step below. These spreadsheets below will make your job much more easier, allowing you to shorten the time used for endless calculations of cables, voltage drop, various sections of circuit breakers, capacitors, cable size and so on. (1) Calculation of a time delay value in definite-time over-current elements. To work on relay settings, one only needs to review the document and make adjustment if necessary. Fault current calculations are based on Ohm's Law in which the current (I) equals the voltage (V) divided by the resistance (R). com is an authorized distributor of Riedon, stocking a wide selection of electronic components and supporting hundreds of reference designs. We need to setting the value of overload relay properly depend on our application and motor full load ampere. This spreadsheet kept a record of all the substations in the network and the settings for each bay relay. Good knowledge in IEC61850 (GOOSE, MMS). There are five different types of time over-current relays. txt) or read online for free. 50 (or 50P) –Instantaneous overcurrent phase relay. time-current-curves. Calculate High Current Setting(I>>). With the proper education, tools, and references such as company standards available, a. VAMP 265 Transformer, generator and motor differential protection relay Testing manual. Maxim Integrated develops innovative analog ICs for the automotive, industrial, healthcare, mobile consumer, and cloud data center markets. Sheet3 IDMT Relay Setting Calculation IDMT Relay Curve Jignesh. 5 Grid Relays Settings 42 3. LifeSafety Power, Inc was formed to address the niche market of providing quality power systems to the security and lifesafety market. This value is set higher than the transformer. A zero-sequence overcurrent relay simply measures the sum of the three phase currents (Equation 1). Protection relay setting calculations: Performed relay settings for several type of relays including SEL-421, SEL-411L, SEL-311L, SEL-451, SEL-700G. UCAS connects people to University, post Uni studies including teacher training, apprenticeships & internships. SEL-487B and SEL-751A. Explore our collections of IEEE Presentations and Transformer White Papers. Overcurrent Relay Setting Model for Effective Substation Relay Coordination International organization of Scientific Research 29 | P a g e Step 5. TOver Current Earth Fault Relay Calculation30 10 12. Ardyono Priyadi, S. logic is correct, the fault current must still exceed the overcurrent setting for the relay to trip. 14) Product Service Code: S112 - UTILITIES- ELECTRIC NAICS Code: 238210 - Electrical Contractors and Other Wiring Installation Contractors Place of Performance:. RELAY SETTING CALCULATION (IDMT Over-Current Protection : 51) Equivalent @ LV switchboard S. Multi Busbar Protection Relay B-PRO 4000 • Easy-to-use, intuitive setting and analysis software • Configure up to 4 B-PRO 4000 relays, each with 6 x 3-Phase CT Inputs, to protect one integrated Multi Bus System • Dynamic Bus Replica • Isolator and CB status monitoring and alarming for mismatch positions. 1; Relay B: Current setting=300 A; TMS=0. Overcurrent protection devices will, of course, either "blow" or "trip" under such conditions, but their interruption ratings have nothing to do with the current at which they open. (4) When solid-state relay s are used, overtravel. time-current-curves. This purpose of this simulation is to give students a way to practice performing hydrostatic level measurement calculations. The time delay is adjustable. 0 W/1000 ft ´ 2 = 3. The overcurrent relay of IDMT type can be used for the same. 5 kV and below) in coordination with Meralco Distribution Offices for: - New feeders - Changes in Distribution network due to reconfiguration and embedded generation (gas, solar and wind). The threshold current are the set current below which the relays must not operate and above which they should operate[6]. Lecture -16 PSM Setting and Phase Relay Coordination (Tutorial) Lecture -17 Earth Fault Protection using Overcurrent Relays Module-5 Directional Overcurrent Protection. They can source stable, low noise voltages as well as monitor load currents over a wide dynamic range from amps to nanoamps. Distance Protection, Differential Transformer, Busbar and Line Protection, Teleprotection, Overcurrent and Earthfault, Voltage Protection. Al-Roomi and M. This guarantees discrimination, or selectivity, without further calculation because it allows short-circuit protection to be time-delayed, even at the maximum prospective short-circuit current. Further the guide lines help not only in carrying out the setting calculations, but also help in future, if. Applications and characteristics of overcurrent potection relays (ANSI 50, 51) Overcurrent relays are the most commonly-used protective relay type. SEL-501 Relay Settings For Feeder-Overcurrent Protection Applications. Modbus and IEC60870-5-10_ (basic). Demonstrate multiple techniques to test relays, so that when one thing doesn't work, you can quickly move on to the next and keep the testing process moving along. Sample Setting Calculation for REF Protection (MCAG Relay) Substation : 220 kV GSS HISSAR Transformer Name : BHEL Relay Name : MCAG, EE Calculation: Transformer Name: BHEL MVA = 100 Voltage Ratio = 220/132 Rated Voltage in kV (HV Side) = 220 Rated Voltage in kV (LV Side) = 132 Vector Group = YNA0d1 % Impedance of the transformer=0. 25=950 ms E/F setting: 20%, 0. This report is to clarify the basic difference between the obsolete KD-4 / KD-41 electromechanical relay and the present design KD-10 / KD-11 Compensator Distance Relays. Instantaneous overcurrent relays have no inherent time delay and are used for fast short-circuit protection. The importance of overcurrent protection. and appropriately. 132kV Power Transformer & Line Protection Relay Settings 0. MiCOM P546 Calculations. With Protection Suite 5. This is a tool for establishing a baseline spark advance table for your tuning efforts with MegaSquirt® or MicroSquirt® controllers. Modbus and IEC60870-5-10_ (basic). Abstract—Setting transmission line relays is fairly easy to learn—but takes years to master. transformer. Electric Wire 240 Volts Single-Phase - Maximum Length. Main Ground Protection. Current Relay 47 - Phase-Seq. VAMP 265 - Testing manual - Free download as PDF File (. Following is the formula how to calculate Motor loads. com is an authorized distributor of Panasonic, stocking a wide selection of electronic components and supporting hundreds of reference designs. Differential Relays 2. Overcurrent protectio n with fuses or relays provid ed the first type of t ransformer fault protect ion [4]; it continues to be appl ied in small capacity t ransformers. KEC115, KEC116 and KEC117 AC Generator Short Circuit & Over Current Protection, Output Relays, Optional Analog Output $ 718. 5 Protective Relay Coordination and Discrimination Study A relay coordination study shall be carried out to determine the setting of the protective relays and direct acting circuit breakers. The choice of Relay Class affects the calculation method. This is very useful when you are in pre-production as you will easily be able to calculate in advance whether or not you will need an external generator, and how many. Setting calculation based on the relay type, relay function is a major concern for utilities and understanding each setting and basis for setting helps in arriving at right settings. SEL-501 Relay Settings For Feeder-Overcurrent Protection Applications. Good knowledge in IEC61850 (GOOSE, MMS). 1 In for maximum sensitivity The stabilizing resistor shall be set at value of resistance during fault minus the relay resistance = 62. Current Relay 47 - Phase-Seq. Ardyono Priyadi, S. Electric Wire 240 Volts Single-Phase - Maximum Length. Substations. ETAP provides customized libraries for many devices that include typical, standard and manufacturer information. 2) A/B group settings The phase over-current functions of a SEPAM relay comprises 4 independent elements which are divided equally into 2 groups (A & B). SEL-487B and SEL-751A. 💎 Comparison between multiple relays is possible (Up to 10 relays). 15 x In ts = 2. woodside, w. Leverage Watlow's growing toolkit of calculators, equations, reference data and more to help design your thermal system. All You Need to Know About a Relays: What is a Relay?A relay is an electrically operated switch. Setting calculation is separated for overcurrent and eart fault relay. 555 Timer Astable Circuit Calculator In this 555 timer Astable calculator , enter the values of timing capacitor C and timing resistors R1 & R2 to calculate the frequency, period and duty cycle. The time delay is adjustable. – POWER Engineers. Parmar, www. 1200/5 ct: From figure 1, the winding resistance is 0. You can use combinations of curve types to achieve the design requirements. With Protection Suite 5. XLSX BATTERYSIZECALCULATOR28-5-11. Feeder description. Transmission and distribution systems are exposed to overcurrent flow into their elements. Malfunction of current sensor of. The overcurrent relay of IDMT type can be used for the same. 0 (0 ratings) Course Ratings are calculated from individual students' ratings and a variety of other signals, like age of rating and reliability, to ensure that they reflect course quality fairly and accurately. The relay shown in figure is used for cable differential purpose. You will need two pieces of information here: the relay’s thermal and magnetic settings used for overload and overcurrent conditions respectively. For Generator Relay class and Motor Relay class, the trip settings are in multiples of full load amps (FLA). Overcurrent protection devices will, of course, either "blow" or "trip" under such conditions, but their interruption ratings have nothing to do with the current at which they open. General equation of phase and magnitude comparators, Duality of comparators, Electromagnetic relays, over current relays Directional relays, Distance relay- impedance, Reactance and Mho type, Differential relays. Deskripsi: Hak Cipta: Attribution Non-Commercial (BY-NC) Format Tersedia. The secondary current under maximum fault conditions is expected to be 24 000/240 = 100 A. Modbus and IEC60870-5-10_ (basic). Mohammed Tawfeeq 011 2. Basic parameters were captured, for example, over-current plug setting and over-current time multiplier. 866 u the 3-Phase FLA 2-Phase, 3-wire current in common wire P 1. Short-circuit current calculations and relay settings calculation manually or by Software (ETAP, EnergyCS). How to calculate Motor Loads. Good knowledge in IEC61850 (GOOSE, MMS). NEMA - The National Electrical Manufacturer's Association - who sets the design standards for motors, has established a NEMA Code letter designation to classify motors by the ratio of locked rotor kVA per horsepower. Section of coordinated downstream trip units, load calculations, cable sizing to suit breaker/ relay/ trip unit selected and single point of failure analysis. Features: Examines the protection of generators and motors at a level of depth not found in more general texts on the subject. XLSX BATTERYSIZECALCULATOR28. or Phase-Bal. In an electric power system, overcurrent or excess current is a situation where a larger than intended electric current exists through a conductor, leading to excessive generation of heat, and the risk of fire or damage to equipment. settings to one central excel spreadsheet. Find all the information for your next step. How to Size an Overcurrent Device for a Transformer. The spreadsheet can be used to convert existing time dial settings for old induction disk relays to the nearest equivalent time dial setting for a Basler Electric overcurrent relay. Calculating of Time Multiplier Setting The calculations of this time multiplier are done in the Microsoft excel in order to get the result of the time delay. N-1-1 state; therefore, this study proposes an optimal relay setting of overcurrent relays subject to N-1 and N-1-1 states. k says: October 11, 2013 at 4:32 pm Hello sir‑ what is the use of low over current(>i) setting and high over current setting(>>i), sir i requesting you to post some notes on this topic thankyou Reply engelect says: October 12, 2013 at 11:01 pm dear elango, Just sharing. 2 Fault Level and Fault 34 Current Calculation (Balance Fault) 4. Capture the life cycle of protection settings and template. This tutorial demonstrates how to add new models and TCC curves to the overcurrent. Minimized bank grounding section directing references to IEEE 1036. Recently updated with 9 Digitized Graphs covering subjects such as Multiplying Factors for Three-phase and Line-to-Earth Faults, CT Magnetisation Curves, IEC Overcurrent Relay Curves, Thermal Limits of Copper Conductors with Thermoplastic Insulation, Time-current Curves for Reclosers, and Range of Settings and Operating Characteristics for GE Thermal Relays. This in-volv es calibrating the relays to the coordination cu rves and adjusting time dials to achieve specifi c op erating times. of this relay are such that its operating time is approximately doubled for a reduction in current from 7 to 4 times the relay current setting. This setting is primarily needed to prevent operation of relay in case of through fault results saturation of CTs causes a transient differential current to be detected by the relay. Main Ground Protection. Engineering design and execution of relay retrofit projects on site. Over Current Relay Settings for Single Transformer. xls), PDF File (. X 2(200%) = 20 Amps 1. How to Calculate CT Ratio. Honeywell offers a wide variety of current sensors to monitor alternating (ac) or direct (dc) current. MiCOM P546 Calculations. 6 kV and 44 kV) o Exposure to basic feeder protection techniques such as DG Anti-Islanding, back to back feeders, load encroachment, etc. 219782759-Calculate-IDMT-Over-Current-Relay-Setting-50-51-Electrical-Notes-Articles. Malfunction of fan inter lock: Defect of relay contact Broken wire 78: System No. The inrush current stabilization function allows the relay to be used as main protection of distribution transformers. Calculations : Calculation of relay operating time: In order to calculate the actual relay operating. To work on relay settings, one only needs to review the document and make adjustment if necessary. pdf), Text File (. The secondary current under maximum fault conditions is expected to be 24 000/240 = 100 A. Instantaneous over current (50) elements have only one setting: the pickup current. working and guide Protection of transformer and circuits -. A Micom P642 industrial relay forms the main part of the unit. WORK UNIT. Protection Settings Calculations for Lines. B, O/L of DOL Starter. Modbus and IEC60870-5-10_ (basic). F6TesT has an intuitive user interface and features graphical protection-test modules. Instantaneous overcurrent relays have no inherent time delay and are used for fast short-circuit protection. 010 and C37. For Generator Relay class and Motor Relay class, the trip settings are in multiples of full load amps (FLA). Import and Export data through excel and xml files. They are used on transmission lines to see to that the line current doesn't exceed safe values and if it does, triggers the circuit breaker. 61 W 1500 ft of #10 wire: 1500 ft ´ 1. 555 Timer Astable Circuit Calculator In this 555 timer Astable calculator , enter the values of timing capacitor C and timing resistors R1 & R2 to calculate the frequency, period and duty cycle. Background 2. If the overload condition is still present after this load reduction the generator breaker will trip 1 sec or 200mS later relative to set O/C or S/C time delays. Distance Protection, Differential Transformer, Busbar and Line Protection, Teleprotection, Overcurrent and Earthfault, Voltage Protection. This spreadsheet was stored on a central network drive which could be accessed. This permits the use of the same time multiplier setting for several relays in series. Medium voltage products Technical guide Protection criteria for medium voltage networks. file_download. All fault types can be simulated. Time Overcurrent The principle of time overcurrent protection is that relays are applied appropriately at the terminals of zones, and each relay is then given both a current pickup and a time delay setting. Harmonic studies. 12 Calculate IDMT over Current Relay Setting (50/51) 294. Introduction With the inclusion of new language in the 2005 National Electrical Code® (NEC®), the requirements for selective coordination of electrical power systems are, at present, more stringent than. 3 second time margin between the curves. Calculate the Primary operating current for relay setting value current Ex: Relay setting 20% CT ratio = 3000/1 20 % of secondary current 0. Distance Protection, Differential Transformer, Busbar and Line Protection, Teleprotection, Overcurrent and Earthfault, Voltage Protection. Overcurrent protection devices will, of course, either “blow” or “trip” under such conditions, but their interruption ratings have nothing to do with the current at which they open. com enable engineers to establish connections with other engineers from around the world. EXCEL DECK WEIGHT AND COST CALCULATOR. The unit mounts on the desk area of the Protection and Relay Test Set or other Power System product. How to overcurrent protect 600 Volt class transformers and associated wiring per NEC 450. How to calculate Motor Loads. • Conducted regular review and update of settings for in-service protective relays • Performed relay setting calculation of Distribution protection (34. Once the circuit breaker opens or "trips" due to a short circuit or some other overcurrent scenario, the circuit. The relay has to be set at Is = 0. o Configured relay settings for distance and overcurrent feeders with DGs + reclosers on 3 wire and 4 wire systems (27. Transmission Line Setting Calculations – Beyond the Cookbook Michael J. RELAYS 101 iPh for the iPhone (or iPad) is designed to be used as a Relay Tech Calculator. The relay with application configuration B offers, non-directional over current and earth-fault protection. report only input data required for load flow and short-circuit. The predictor relay(s) trips at set over current (O/C) or short circuit current (S/C) level, prior to the generator breaker trip. 15 Section 430-32(a)(1) allows 125 percent of the FLC of the motor for the motor overload protective device. Calculate IDMT Over Current Relay Setting (50/51) EXCEL DECK WEIGHT AND COST CALCULATOR. And still other relays set the relay using R1, X1, R0 and X0. For solenoid-actuated devices, tap or current settings. protection has a hot and a cold curve; the usual over-current protection has only one tripping curve: † For a usual over-current protection, the tripping time is not related to the initial value of the current as long as it is below the set point. SEL-2664S. For full details of the high-set instantaneous units refer to relevant publications. To check compliance with the specification, the tests presented in Table 2 need to be carried out. A Micom P642 industrial relay forms the main part of the unit. DIRECTIONAL OVERCURRENT RELAY. 1 second time margin between the curves to allow for temperature variations in the fuse. 14 Calculate No of Street Light Pole 299. Lecture 4 handwritten notes. El-Hawary, "Optimal Coordination of Directional Overcurrent Relays Using Hybrid BBO/DE Algorithm and Considering Double Primary Relays Strategy," in 2016 IEEE Electrical Power and Energy Conference (EPEC), Ottawa, ON, 2016, pp. Subject: Investigation of recent trippings of power transformer on Harmonics in differential relay for taking corrective action to prevent further trippings. There are five different types of time over-current relays. Calculate ΔT ΔT = Tm - Ta English = 40ºF - (-20ºF) = 60ºF Metric = 4. Then analyse the situation in the microgrid when it is islanded. 3) Develope modbus tcp client program HMI graphic interface using C/C++ programing language. Feeder Ground Protection. 20(A) and 215. • Member of commissioning group for Giza substation 220/66/11KV, New Cairo substation 220/66/11KV, Nubaria substation 500/220/66/11KV,. Overcurrent Coordination Page 3 Qual-Tech Engineers, Inc. XLS SHORT CIRCUIT CALCULATION (10. blog, IT, 전기전자, 가스, 블로그 Unknown [email protected]gger. IDMT Over current & Earth Fault Relay Setting: Calculate IDMT Over Current Relay Setting (50/51) Calculate IDMT Over Current Relay Pick up setting. the networks with the calculation results, a list of cables) to XLS format. Breaker Operate Time In addition to analog quantities, most relays also include digital indication of inputs, outputs and relay logic. Select a Web Site. , is an electrical engineer with CHA in Albany, N. HALAMAN JUDUL TUGAS AKHIR – TE 145561 MONITORING DAN SETTING DIGITAL RELAY SATU FASA. However, the relay settings selected are often a compromise in order to cope with both overload and overcurrent conditions. I commonly use inverse-time, definite-time, and instantaneous elements, all on the same relay. complex, even where only a simple relay function is being assessed. After setting review, the setting. There are absolutely powerful tools to manage your relay settings Files. Differential relay sensitivity is inversely proportional to restraint current. Relays are the sensing device which sense the abnormal condition in any power system and accordingly give alarm and trip signal to circuit breaker. Actual Remark OK / Not OK 1. Rather, a device with an interruption rating of 10,000 amps is certified to be able to stop a fault current of that magnitude once having opened. Select from the standard set of IEC and IEEE curves. FREJA 300 Relay Test System Local Mode General Local Mode Rx (I) Local Mode - without PC Using the dial by turning and clicking it is easy to make the settings. pdf), Text File (. Good knowledge in IEC61850 (GOOSE, MMS). ELECTRICAL TECHNOLOGY and INDUSTRIAL PRACTICE 57,355 views 8:10. rly o HHD-B High VoltageCurrent-Limiting fuse Cooper. Introduction With the inclusion of new language in the 2005 National Electrical Code® (NEC®), the requirements for selective coordination of electrical power systems are, at present, more stringent than. Explore more at Arrow. Transmission Line Setting Calculations - Beyond the Cookbook Michael J. Actual load. SEL-2664S. How to INCREASE the lifetime of an electrical installation. Overcurrent Relay 67 - AC Directional Overcurrent Relay. Calculate IDMT Over Current Relay PSM. Then analyse the situation in the microgrid when it is islanded. Fault Current Calculations and Relay Setting - Free download as PDF File (. Following is the formula how to calculate Motor loads. Again, start off with a CB1 relay time setting of 0. Overcurrent protectio n with fuses or relays provid ed the first type of t ransformer fault protect ion [4]; it continues to be appl ied in small capacity t ransformers. relay solution in power plants sold by Wärtsilä, Wärtsilä required a user guide, adapted for their purposes, for ABB's REG670 generator protection relay to be used by field service en- gineers on power plant sites for the commissioning. Time in seconds. 1 Calculation 31 4. This model data will be used to estimate the performance of protective relays. For larger systems, these short circuit calculations to be performed for both switch gear ratings and relay settings. This setting is primarily needed to prevent operation of relay in case of through fault results saturation of CTs causes a transient differential current to be detected by the relay. 2) A/B group settings The phase over-current functions of a SEPAM relay comprises 4 independent elements which are divided equally into 2 groups (A & B). 3 Setting of high-set overcurrent (short-circuit) unit The settings for the high-set overcurrent unit are found in the High-set overcurrent unit section in the relay setting window (Fig. Buy a discounted Hardcover of Protective Relay Principles online from Australia's leading online bookstore. Our expectations are: 1- No operation for normal duty of the device 2- No operation for fault outside 3- Operate for a fault inside The problem is the mismatching of currents: 1- May occur during the normal operation of the device. This study aims to find out more current f lows and calculate the value of setting on more relay current. 39984912-Setting-Calculation-Protocol-for-IDMT-Over-Current-Relay. 61 W 1500 ft of #10 wire: 1500 ft ´ 1. Moreover, the proposed scheme is validated using GE Multilin, model-750/760 overcurrent relay in ETAP (industrial simulation software) on the modified IEEE 9-bus 4-DG microgrid. Calculation: Differential Relay setting calculations of the Power transformer based on Typical Power Transformer data as mentioned below: Data: 1. Tripping delay tr (long time) for 6 x Ir 3. 1, and use the standard inverse (SI) characteristic. Enviado por. The secondary current under maximum fault conditions is expected to be 24 000/240 = 100 A. Note: The tools are not interchangeable. pdf), Text File (. Breaker Operate Time In addition to analog quantities, most relays also include digital indication of inputs, outputs and relay logic. Power Load Calculator. Main Ground Protection. This setting limitation means that load or system induced zero-sequence current can severely impact the sensitivity of a zero-sequence overcurrent element [11]. or Phase-Bal. the selection of CT ratio and calculation of fault/pickup ratio. Project management and team collaboration, with clear easy to read calculations and reports. 14 Calculate No of Street Light Pole 299. Time in seconds. Select a Web Site. If we setting low from FLA,it can cause motor trip c0ntinues and process not running smoothly. Harmonic studies. Type CDG 21 relay is a single pole type CDG 11 relay with a high-set instantaneous unit. When an electrical power transformer is switch on from primary side, with keeping its secondary circuit open, it acts as a simple inductance. • The Y‐axis is the Differential/Operate current is the sum of all winding. iPhone and iPad users can visit the Apple Store and download (for a small price) my RELAYS 101 App. Feeder description. Modbus and IEC60870-5-10_ (basic). 3 Three Phase Fault at Substation-2 39 4. N-1-1 state; therefore, this study proposes an optimal relay setting of overcurrent relays subject to N-1 and N-1-1 states. Calculate Actual Operating time according to Various IES Curve. Korean Gas Electronic engineer. Voltage Relay 48 - Incomplete-Sequence Relay 49 - Machine or Transformer Thermal Relay 50 - Instantaneous Overcurrent 51 - AC Inverse Time Overcurrent Relay 52 - AC Circuit Breaker 53 - Field Excitation Relay 55 - Power Factor Relay 56 - Field Application Relay. With SIRIUS, we offer you a unique comprehensive portfolio for every industrial control application. Advanced relays used at the substation incorporate a distance to fault locator that uses the measured current and voltage at the relay point to predict the fault location thus aiding in fault finding. 0 Time-Current Characteristic (TCC) Curves Information Bulletin 680-211 contains curve plots for all Vista Overcurrent Control 2. Calculation of Over Current Relay Setting: (1) Low over Current Setting: (I>) Over Load Current (In) = Feeder Load Current X Relay setting = 384 X 125% =480 Amp; Required Over Load Relay Plug Setting= Over Load Current (In) / CT Primary Current; Required Over Load Relay Plug Setting = 480 / 600 = 0. over-current protection, self-regulating heater, time-delays, liquid level sensing Thermistor packages Several package types and sized are available, the radial leaded type is the most common and mostly constructed from epoxy. Stator ground over current (Low, Med Z Gnd, Neutral CT of flux summatin CT) 25 Synchronism check 51GN, 51N Stator ground over current (High Z gnd) 32 Reverse power (one stage) 51VC Voltage controlled overcurrent 32-1 Reverse power, Non electrical trip supervision 51VR Voltage restrained overcurrent 40 Loss of field (Var flow approach) 59N, 27-3N,. This spreadsheet was stored on a central network drive which could be accessed. Acromag is an international corporation that combines more than 60 years of process monitoring and control experience with a solid background in high-tech computer design. the short circuit current rating for industrial control panels, and one could proceed without further tests. Engineers can make changes to relay settings and the configuration of the system and see the effects without needing to re-calculate time consuming short-circuit equations by hand. This tutorial demonstrates how to add new models and TCC curves to the overcurrent. ETAP Star Protective Device Coordination software provides a Plot Options tool with all the necessary options to customize the display of the Time Current Characteristic Curve. To Determine the Operating Characteristics of the Numerical Overcurrent Relay 110V AC MICOM P120 6 2 34 33 56 55 220V DC 110V AC Supply A DPST A C E 5Ω, 9A 5A 10A 0-10 A Contactor Trip Overcurrent Relay Theory: Relay operates when, relay current I≥K 1 I ref ----- (1), where K 1 = pickup setting Operating time of IDMT relay, t=T×(K (I ⁄IS. ADDC Testing and Protection Section Setting Calculation Protocol for IDMT Overcurrent. Attached are the two tools to calculate the IDMT Curves for the all the MiCOM and all the SEPAM relays. REXA103 - Auto Re-Closure. Line Differential. Protective Relaying for Power Generation Systems by Donald Reimert. The best method for providing overcurrent protection for most circuits is to use a circuit breaker that combines overcurrent protection with short-circuit and ground-fault protection. Setting calculation is separated for overcurrent and eart fault relay. See the complete profile on LinkedIn and discover Mohammad’s connections and jobs at similar companies. Phase overcurrent,High set,for Stub bus application Negative sequence overcurrent Switch onto fault and trip on reclose Phase overcurrent, DT or IDMT Ground over current, DT or IDMT Fuse failure overcurrent Phase directional overcurrent DEF, communication aided Power swing detection,used to selectively permit or block tripping Voltage. Calculate IDMT Over Current Relay PSM. TL = the relay time dial setting, I = the relay current, in multiples (per unit) of the relay nominal current (in this case, the latter will be 5 amps). Protection Relays How Differential Relays - 87 can we measure the differential current? Simply by an overcurrent relay. Distance Protection, Differential Transformer, Busbar and Line Protection, Teleprotection, Overcurrent and Earthfault, Voltage Protection. 04 V which is equivalent to 2. Base MVA=100 Fault MVA=1200 Source impedance=0. Actual Remark OK / Not OK 1. The spreadsheet can be used to convert existing time dial settings for old induction disk relays to the nearest equivalent time dial setting for a Basler Electric overcurrent relay. Standards such as ANSI C37. To find more books about overcurrent relay setting calculation, you can use related keywords : Overcurrent Relay Setting Calculation Xls, overcurrent relay setting calculation, Overcurrent Relay Setting Calculation Example, relay setting calculation, relay setting calculation example, protective relay setting calculation, Siemens Relay Setting Calculation, micom relay setting calculation, Idmt. 14 Calculate No of Street Light Pole 299. Short-circuit current calculations and relay settings calculation manually or by Software (ETAP, EnergyCS). This is a tool for establishing a baseline spark advance table for your tuning efforts with MegaSquirt® or MicroSquirt® controllers. iPhone and iPad users can visit the Apple Store and download (for a small price) my RELAYS 101 App. With the microprocessor relay, various curves or multiple time-delay settings can be input to set the relay operation. Sample Setting Calculation for REF Protection (MCAG Relay) Substation : 220 kV GSS HISSAR Transformer Name : BHEL Relay Name : MCAG, EE Calculation: Transformer Name: BHEL MVA = 100 Voltage Ratio = 220/132 Rated Voltage in kV (HV Side) = 220 Rated Voltage in kV (LV Side) = 132 Vector Group = YNA0d1 % Impedance of the transformer=0. 8 , Overload Relay of Starter is Put before Motor. You can use combinations of curve types to achieve the design requirements.