This series transformer with the relay DD11/60 type,when the scope of protectionwithin a groundfault.Residual current in the transformer secondary circuit.When the current reaches a certain value,the relay action.
Specification
Type | Allowed to cross the cable number(root) | Secondary total impedance | Connect the relay model | Relay setting current | Protection sensitivity | Frequency test voltage |
LJ-2 | 1-2 | <10 | DD11/60 | 0.03 | 1-3 | 2 |
LJ-4 | 3-7 | <10 | DD11/60 | 0.03 | 1-3 | |
LJ-7 | 5-7 | <10 | DD11/60 | 0.03 | 1-3 | |
LJ1 | 1 | <10 | DD11/60 | 0.03 | 1-3 |
Dimensions
LJ2,4,7 | |||||||
Type | D | d | d1 | A1 | A2 | B1 | B2 |
LJ-1 | 145 | 82 | 9 | 80 | 60 | 130 | 80 |
LJ-2 | 230 | 110 | 13 | 150 | 155 | 200 | 195 |
LJ-3 | 285 | 140 | 220 | 280 | |||
LJ-4 | 310 | 185 | 300 |
Accuracy test
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