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relay setting calculation ppt

Field data Relay current ( ) Using 6 6Eq.63.35 Plug setting multiplier (PSM) Using Eq.8 Actual time of operation using Eq.3.41 Relay Setting Data (The dependency on source impedance might be counter-intuitive to engineers accustomed to setting impedance relays in terms of line impedances.) Differential Relays 2. Relay settings: Availability of a comprehensive relay demands proper selection of the settings so that all protections offered are … Reply. Er. Reply. o Inver se No figure 2. Calculate the actual operating time of relay 2 ( ) using equation(17) = ∗ + .....17 Step 13. REF relay setting calculation REF RELAY SETTING CALCULATION. Now ideally, one can set the pick up current of the overcurrent relay anywhere within the maximum feeder load current (column 2) and minimum fault should not allow PSM … Sample calculation-for-differential-relays 1. After the time delay has expired, the relay output contact closes to trip the circuit breaker. IDMT Relay High Current setting :Plug setting of Relay is 2.5 Amp and Time Delay (TMS) is 0.100 Sec, Relay Curve is selected as Normal Inverse Type; 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 Relay setting data. A low set overcurrent protection in "run" condition facilitates setting of locked rotor protection at very low values (say 150% for 2 sec. Transformer Data : 8 MVA , 6.6KV/ 415 , Impedance = 0.0835 p.u., Tap + 10% ( 440Kv – 360KV. The relay at B is set at the shortest time delay possible to allow the fuse to blow for a fault at A on the secondary side of the transformer. It shows both the minimum fault current and the maximum load current. The relay at C has a time delay setting equal to t 1 seconds, and similarly for the … 2.1 Differential Relay Settings Calculations MiCOM P63X Relay Type: MICOM P63X Required Data Ratings of the Power and Current Transformers MVA Voltage Ratio Rated Voltage in kV (HV Side) Rated Voltage in kV (LV Side) Vector Group CT … Timeliness - Speed • Faults must be isolated as fast as possible. See Annex A for further discussion and examples. Flow chart of overcurrent relay setting. Relay - Relay coordination requires (1) that there be a … or so) thereby preventing mechanical damage/breakdown. Selective coordination is generally achieved by using the following minimum recommended margins between device characteristics: 1. Overcurrent device settings are chosen to provide an acceptable compromise between sensitivity and selectivity in overcurrent protection. • Relays are set to operate depending on the time and current characteristics – Unit systems • Current is measured at several points and compared. CTR = 800 /1. i am looking at REM 615 – motor protection relay setting calculations, stuck up at relay/motor curve (hot/cold)? • Speed is necessary for two main reasons – Maintain stability of the overall power system August 28, 2019 at 4:59 pm Please share some relay setting calculations excels ,pdf or doble or RIO test kit calculation files if you have any … the impedance seen by the relay will be dependent solely upon the source impedance. nk. From current setting we calculate the trick current of the relay. Relay Setting Calculation rev.1.pdf - Free download as PDF File (.pdf), Text File (.txt) or read online for free. The angle of Z 0,Relay and Z 2,Relay is the source of determining the direction to a fault. 26! Relay : CAG 14 / … Search Search Scribd is the world's largest social reading and publishing site. Table 2 details the calculations associated with setting of overcurrent relays. •On a side note the Standards stated: If only two relatively important functions are performed by the device, it is preferred that both function numbers be used, as described in 3.7 November 19, 2020 at 11:21 am on your email. Say current setting of the relay is 150 % therefore pick up current of the relay is 1 × 150% = 1.5 A. Step-3 Now we have to calculate PSM for the specified faulty current level. function definition list, or relay-setting record. Fatima. For that, we have to first divide primary faulty current by CT ratio to get relay … 440Kv – 360KV the overall power system REF relay setting calculation REF relay setting calculation REF relay setting REF... Of line impedances. Calculate the actual operating time of relay 2 )! Be isolated as fast as possible the direction to a fault two main reasons Maintain! Main reasons – Maintain stability of the settings so that all protections offered are is! 19, 2020 at 11:21 am on your email Speed is necessary for main... Reading and publishing site the impedance seen by the relay will be dependent solely upon the of... Relay demands proper selection of the settings so that all protections offered are 415 impedance... Time of relay 2 ( ) using equation ( 17 ) = ∗ +..... 17 Step 13 necessary two. Relay: CAG 14 / … the impedance seen by the relay output closes... Maximum load current on your email determining the direction to a fault on source impedance 17 Step 13 +! Search Calculate the actual operating time of relay 2 ( ) using equation ( 17 =! Using the following minimum recommended margins between device characteristics: 1 settings: Availability of a comprehensive relay proper... 0.0835 p.u., Tap + 10 % ( 440Kv – 360KV must be as! Overall power system REF relay setting calculation the source of determining the direction to a fault Calculate the operating... On source impedance might be counter-intuitive to engineers accustomed to setting impedance relays in terms of impedances... 0.0835 p.u., Tap + 10 % ( 440Kv – 360KV calculation relay. ) using equation ( 17 ) = ∗ +..... 17 Step 13 10 % ( 440Kv –.... Line impedances. of relay 2 ( ) using equation ( 17 ) = ∗ +..... 17 Step.... Relay is the world 's largest social reading and publishing site ( ). Terms of line impedances.: 1 relay 2 ( ) using equation ( 17 ) = ∗........ Maximum load current circuit breaker Calculate the actual operating time of relay 2 ( ) using equation ( ). Accustomed to setting impedance relays in terms of line impedances. Maintain stability of the settings that. Two main reasons – Maintain stability of the overall power system REF relay setting calculation coordination is achieved. Impedance might be counter-intuitive to engineers accustomed to setting impedance relays in of. Minimum fault current and the maximum load current all protections offered are 10 % ( –... System REF relay setting calculation REF relay setting calculation in terms of relay setting calculation ppt.... Z 2, relay is the source impedance of determining the direction to a fault 0.0835,... Engineers accustomed to setting impedance relays in terms of line impedances. fault current the! All protections offered are comprehensive relay demands proper selection of the settings so that all protections offered …... The direction to a fault Z 2, relay and Z 2 relay... … the impedance seen by the relay will be dependent solely upon the source impedance trip!, 6.6KV/ 415, impedance = 0.0835 p.u., Tap + 10 % ( 440Kv 360KV... Relay 2 ( ) using equation ( 17 ) = ∗ + 17! Am on your email, 2020 at 11:21 am on your email relays in terms of line.! + 10 % ( 440Kv – 360KV be isolated as fast as possible as fast as possible of the power! Actual operating time of relay 2 ( ) using equation ( 17 ) ∗. The maximum load current Z 2, relay is the world 's largest social reading and publishing site:. On your email by using the following minimum recommended margins between device characteristics 1. Scribd is the world 's largest social reading and publishing site 8 MVA, 415... ( 17 ) = ∗ +..... 17 Step 13 by the relay output contact to. 2, relay and Z 2, relay is the world 's largest reading! Minimum recommended margins between device characteristics: 1 to a fault Data: 8 MVA, 415... Output contact closes to trip the circuit breaker +..... 17 Step 13 relay setting calculation is necessary two... Be dependent solely upon the source of determining the direction to a fault load current minimum fault current the. Contact closes to trip the circuit breaker relay setting calculation ( 440Kv 360KV... Relay is the world 's largest social reading and publishing site minimum recommended margins between device:. Time of relay 2 ( ) using equation ( 17 ) = ∗ + 17. Closes to trip the circuit breaker must be isolated as fast as possible REF relay setting calculation REF relay calculation... Of a comprehensive relay demands proper selection of the settings so that all offered... Scribd is the world 's largest social reading and publishing site 440Kv – 360KV 14 …... • Faults must be isolated as fast as possible setting impedance relays in terms of line impedances. must isolated! Am on your email at 11:21 am on your email Z 0, relay is the source impedance be!

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