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KON-215-60-33.2-v.1.0-E RFD TEHNICAL DESCRIPTION.doc
Protection functions
Stabilized three phase differential transformer protection (ANSI No. 87T)
- Measurement inputs IAA, IBA, ICA
IAB, IBB, ICB
- Function activation Func. OFF
ON
- task interval 5 ms
- Pickup value dI-basic 5
– 50 %
default: 20 %
- Pickup value dI-start 10
– 50 %
default: 30 %
- Pickup value TP2 100
– 300 %
default: 150 %
- 2. stage pickup value dI>> 0.50
– 30.00 In
default: 1.00 In
- harmonic block function activation HarmBLK OFF
2nd
5th
2nd, 5th
- 2. harmonic pickup value 2nd BLK 7
– 20 %
default: 15 %
- 5. harmonic pickup value 5th BLK 10
– 50 %
default: 35 %
- maximum inrush current Imax 1.00
– 20.00 In
default: 7.00 In
Stabilized low impedance restricted earth-fault protection of transformer primary
(ANSI No. 87TN-A)
- Measurement inputs
IAA, IBA, ICA, IEA
- Function activation Func. OFF
ON
- task interval 5 ms
- Pickup value dI
0A
> 5
– 50 %
default: 20 %
- time delay t> 0,00
– 300,00 s
default: 0,05 s
- blocking by inrush function activation InRushBLK OFF
ON
default: OFF
Stabilized low impedance restricted earth-fault protection of transformer secondary
(ANSI No. 87TN-B)
- Measurement inputs
IAB, IBB, ICB, IEB
- Function activation Func. OFF
ON
- task interval 5 ms
- Pickup value dI
0A
> 5
– 50 %
default: 20 %
- time delay t> 0,00
– 300,00 s
default: 0,05 s
- blocking by inrush function activation InRushBLK OFF
ON
default: OFF