ABB | RED670 | Line Differential Protection Module
Specification | Details |
---|---|
Product | ABB RED670 Line Differential Protection |
Current Transformer Ratios
Ratio | Details |
---|---|
Current Transformer Ratio 1 | - Ratio: 2000/5A - CT Class: C800 (At max tap of 2000/5A) - Secondary Resistance: 0.5 Ohm (2000/5A tap) - Cable Loop Resistance: 2 Ohms - Max Fault Current: Equal to switchgear rated fault current 40 kA |
| Current Transformer Ratio 2 | - Ratio: 100/5 A (Note: Must be the same at all locations) <br> - CT Class: C200 <br> - Secondary Resistance: 0.1 Ohms (At 100/5 Tap) <br> - Cable Loop Resistance: <100 ft AWG10 (one way between the junction point and the farthest CT) limited to approximately 0.1 Ohms at 75°C <br> - Max Fault Current: The maximum through fault current is limited by the reactor reactance; for example, 800 A inrush. |
| Current Transformer Ratio 3 | - Ratio: 600-300/5A (Note: Must be the same at all locations) <br> - CT Class: C200 <br> - Secondary Resistance: 0.66 Ohms <br> - Cable Loop Resistance: <50 ft AWG10 (one way between the junction point and the farthest CT) limited to approx. 0.05 Ohms at 75°C gives loop resistance 2 x 0.05 = 0.1 Ohms <br> - Max Fault Current: The maximum through fault current is limited by the transformer reactance; use 15 x rated current of the transformer. |
ABB | RED670 | Line Differential Protection Module
ABB | RED670 | Line Differential Protection Module
Specification | Details |
---|---|
Product | ABB RED670 Line Differential Protection |
Current Transformer Ratios
Ratio | Details |
---|---|
Current Transformer Ratio 1 | - Ratio: 2000/5A - CT Class: C800 (At max tap of 2000/5A) - Secondary Resistance: 0.5 Ohm (2000/5A tap) - Cable Loop Resistance: 2 Ohms - Max Fault Current: Equal to switchgear rated fault current 40 kA |
| Current Transformer Ratio 2 | - Ratio: 100/5 A (Note: Must be the same at all locations) <br> - CT Class: C200 <br> - Secondary Resistance: 0.1 Ohms (At 100/5 Tap) <br> - Cable Loop Resistance: <100 ft AWG10 (one way between the junction point and the farthest CT) limited to approximately 0.1 Ohms at 75°C <br> - Max Fault Current: The maximum through fault current is limited by the reactor reactance; for example, 800 A inrush. |
| Current Transformer Ratio 3 | - Ratio: 600-300/5A (Note: Must be the same at all locations) <br> - CT Class: C200 <br> - Secondary Resistance: 0.66 Ohms <br> - Cable Loop Resistance: <50 ft AWG10 (one way between the junction point and the farthest CT) limited to approx. 0.05 Ohms at 75°C gives loop resistance 2 x 0.05 = 0.1 Ohms <br> - Max Fault Current: The maximum through fault current is limited by the transformer reactance; use 15 x rated current of the transformer. |