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LJ-2(47) Type Current Transformer
Applications
LJ-2(47) type current transformer is intended for zero sequence over-current protection in high voltage three-phase alternator and electromotor,and AC power system with rated voltage 10kV and below,rated frequency 50Hz.
Type Designation
Operation Conditions
Installation area: Indoor.
Ambient temperature: Max. temperature 40;Min. temperature -5;Daily average temperature can't exceed 30.
Air conditions: No heavy pollution in air.
Technical Parameter
Model
Rated current ratio
A
Secondary load
Relay model
Setting current
(Residual current of secondary loop)(A)
Sensitivity(A)
(Primary current for relay operation)
Unbalanced voltage in secondary loop (mV)
LJ-2
25/1
10
DD-11/60
0.03
1-3
40
LJ-4
30/1
LJ-7
35/1
30
Rated insulation level: 0.5/3kV
Structure and Feature

The core of LJ-2(47) adopts the crystallitic alloy or excellent silicon steel sheets to enwind becoming annular,then secondary leads are winded on it evenly.Then deal the winded coil with dipping paint.There are four holes suitable for mounting at the bottom of the product.

Outline and Mounting Dimensions


ͺ
d
D
H
A
B
LJ-2
110
230
180
150
200
LJ-4
140
275
195
220
280
LJ-7
185
310
220
300