SIPROTEC 4 7SA522 Distance Protection Relay for Transmission ...

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SIPROTEC 4 – 7SA522 Distance Protection Relay for Transmission Lines Technical Function Data Breaker failure protection – ANSI 50BF Number of stages 2 Current start 0.1A to 4A (1A) / 0.5A to 20A (5A) (step 0.01A) Delay time 0.05 to 1s (step 0.01s) Shortest release time approx. 10ms Timer tolerance ± 1% of setting value or 10ms Automatic reclosure – ANSI 79 Synchronism check – ANSI 25 Number of automatic reclosures up to 8 Program only 1-pole only 3-pole 1 or 3-pole Voltage check discrimination between successful and non-successful reclose attempts Action times 0.01 to 30 s (step 0.01s) Dead times 0.01 to 1800 s (step 0.01s) Reclaim times 0.5 to 30 s (step 0.01s) CLOSE command duration 0.01 to 30 s (step 0.01s) Timer tolerance ± 1% of setting value or 10ms Operating modes Line dead / busbar dead V 1 /V 2 < Synchronism V 1 >/V 2 > Permissible voltage difference 1 to 50 V (step 1V) Permissible frequence difference 0.01 to 1 Hz (step 0.01 Hz) Permissible angle difference 1 to 60° (step 1) Supervision time 0.01 to 30 s (step 0.01s) 30 Siemens SIP 4.2 · 08/99
Technical Function Data Operational measured values Currents primary, secondary and percent 3xI phase 3I 0 , I 1 , I 2 , I G ,3I 0par Tolerances 10 to 50% V nom typically ≤1% of 50% V nom 50 to 200%V nom typically ≤1% of measured value Voltages primary, secondary and percent 3xV phase-ground, 3xV phase-phase 3V 0 ,V 1 ,V 2 ,V SYNC ,V en Tolerances 10 to 50% I nom typically ≤1% of 50% I nom 50 to 200% I nom typically ≤1% of measured value Power and direction of power flow primary and percent P, real power in W Q, reactive power in Var S, apparent power in VA Frequency f Power factor PF Load impedances with direction primary and secondary 3x(R phase-ground ,X phase-ground ) 3x(R phase-phase ,X phase-phase ) Tolerances P: typically ≤ 3% for |cos ϕ| = 0.7 to 1 and V/V nom , I/I nom = 50 to 120% Q: typically ≤ 3% for |sin ϕ| = 0.7 to 1 and V/V nom , I/I nom = 50 to 120% S: typically ≤ 2% for V/V nom ,I/I nom = 50 to 120% f: ≤ 20mHz PF: ≤ 3% for |cos ϕ| = 0.7 to 1 Oscillographic fault recording Measured analog channels 3 x I phase ,3I 0 ,3I 0par 3xV phase ,3V 0 ,V SYNC ,V en Binary channels pickup and trip information, other signals can be freely configured Maximum number of available recordings 8 Sampling interval 20 samples per cycle Storage time total of 5s pre-event and post-event recording time and event storage time settable Additional functions Measurement supervision current summation current balance voltage summation voltage phase sequence fuse failure monitor Annunciations Event logging buffer length 200 Fault logging storage of signals of the last 8 faults, buffer length 200 Switching statistics phase segregated summation of circuit breaker operations summated tripping current per phase tripping current of the last trip Circuit breaker test trip-/close-cycle 3phase trip-/close-cycle per phase Setting range Dead time for CB trip-close-cycle 0.00 to 30s (step 0.01s) Commissioning aids operational measured values circuit breaker test read binary inputs initiate binary inputs set binary outputs set serial interface outputs Siemens SIP 4.2 · 08/99 31
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