Synchrocheck - GE 750 Instruction Manual

750/760
Feeder Management Relay

Synchrocheck

7–44
If the
OVERCURRENT P/U INHIBIT
1. Assert logic input Setpoint Group 2. The faceplate LED should indicate the relay
is using Setpoint Group 2.
2. Inject current above the pickup setting of an overcurrent element that is not
Disabled.
3. De-assert logic input Setpoint Group 2. The faceplate LED should indicate the
relay is still using Setpoint Group 2.
4. Reduce the injected current until the overcurrent element resets.
5. The LED on the faceplate should indicate the relay is now using Setpoint Group
1. Turn current off.
If the setpoint is to be "Enabled":
OVERVOLT P/U INHIBIT
1. Assert logic input Setpoint Group 2. The faceplate LED should indicate the relay
is using Setpoint Group 2.
2. Inject voltage above the pickup setting of an overvoltage element that is not
Disabled.
3. De-assert logic input Setpoint Group 2. The faceplate LED should indicate the
relay is still using Setpoint Group 2.
4. Reduce the injected voltage until the overvoltage element resets.
5. The LED on the faceplate should indicate the relay is now using Setpoint Group
1. Turn voltage off.
If the
UNDERVOLT P/U INHIBIT
1. Inject voltage above the pickup setting of an undervoltage element that is not
Disabled.
2. Assert logic input Setpoint Group 2. The faceplate LED should indicate the relay
is using Setpoint Group 2.
3. Reduce voltage below the pickup setting of an undervoltage element that is not
Disabled.
4. De-assert logic input Setpoint Group 2. The faceplate LED should indicate the
relay is still using Setpoint Group 2.
5. Increase the injected voltage until the undervoltage element resets.
6. The LED on the faceplate should indicate the relay is now using Setpoint Group
1. Turn voltage off.
If the
UNDERFREQ P/U INHIBIT
1. Inject voltage with frequency above the pickup setting of an underfrequency
element that is not Disabled.
2. Assert logic input Setpoint Group 2. The faceplate LED should indicate the relay
is using Setpoint Group 2.
3. Reduce frequency below the pickup setting of an underfrequency element that
is not Disabled.
4. De-assert logic input Setpoint Group 2. The faceplate LED should indicate the
relay is still using Setpoint Group 2.
5. Increase the injected frequency until the underfrequency element resets.
6. The LED on the faceplate should indicate the relay is now using Setpoint Group
1. Turn voltage off.
1. Make the test connections specified in FIGURE 7–1: Relay Test Wiring – Wye
Connection or FIGURE 7–2: Relay Test Wiring – Delta Connection on page 7–4
and also connect a variable voltage source to the line voltage input.
2. Initially set the function setpoint to Control, the Dead Source Permissive
setpoint to Off and the Maximum Voltage Difference setpoint to 100 kV.
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setpoint is to be "Enabled":
setpoint is to be "Enabled":
setpoint is to be "Enabled":
Control Schemes
GE Multilin