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2.3 EXTERNAL WIRING
A typical wiring diagram for the Protect 4A relay is shown in
figure 2-5. Connections are made to the terminal board pro-
vided which is then plugged onto the Protect 4A relay. Protect
4A relays are interchangeable and can be quickly replaced by
a standard spare unit regardless of the motor current range.
Separate phase and ground fault CTs are wired directly to the
back of the Protect 4A. It is recommended that the ground fault
CT wires be twisted together to minimize noise pickup.
FIGURE 2-5 TYPICAL WIRING DIAGRAM
Summary of Contents for PROTECT 4A-120
Page 1: ...MOTOR PROTECTION RELAY INSTRUCTION MANUAL ...
Page 5: ...2 FIGURE1 1 PROTECT 4A TYPICAL SYSTEM CONNECTION ...
Page 11: ...8 FIGURE 2 2 PHASE CT DIMENSIONS FIGURE 2 3 GROUND FAULT CT DIMENSIONS ...
Page 21: ...18 FIGURE 3 1 FRONT PANEL LAYOUT ...
Page 35: ...32 FIGURE 4 1 SINGLE PHASE INJECTION TESTING FIGURE 4 2 100 AMP CURRENT SOURCE ...
Page 39: ...36 FIGURE 4 3 GROUND FAULT EARTH LEAKAGE TEST ...
Page 44: ...41 FIGURE 5 1 HARDWARE BLOCK DIAGRAM ...
