GE 750 User Manual

GE Power Management 750/760 Feeder Management Relay 17-
51
17 COMMISSIONING 17.9 CONTROL SCHEMES
17
17.9 CONTROL SCHEMES 17.9.1 SETPOINT GROUP CONTROL
The relay is defaulted to setpoint group 1, and will be using this group for setpoints unless
specifically changed to another group. This procedure assumes the relay is using group 1 ini-
tially, as indicated by the LED on the faceplate.
Make connections per Figure 17–1: RELAY TEST WIRING – WYE CONNECTION or Figure 17–2: RELAY
TEST WIRING – DELTA CONNECTION on page 17–4.
1. Change setpoint
SETPOINTS \ S7 CONTROL \ SETPOINT GROUPS \ ACTIVE SETPOINT GROUP
to Group 2 with the
EDIT SETPOINT GROUP
set to Active Group. The LED on the faceplate should now indicate the relay is using
setpoint group 2.
2. Change at least one protection element setpoint from the setting in group 1.
3. Repeat steps 2 and 3 for active setpoint group selections of Group 3 and Group 4, while monitoring that
the LED indicators show the correct group.
4. Check that the operation of the protection feature programmed is controlled by the setting in group 4.
5. Change setpoint
SETPOINTS \ S7 CONTROL \ SETPOINT GROUPS \ ACTIVE SETPOINT GROUP
to Group 3. The LED
on the faceplate should now indicate the relay is using setpoint group 3.
6. Check that the operation of the protection feature programmed is controlled by the setting in group 3.
7. Change setpoint
SETPOINTS \ S7 CONTROL \ SETPOINT GROUPS \ ACTIVE SETPOINT GROUP
to Group 2. The LED
on the faceplate should now indicate the relay is using setpoint group 2.
8. Check that the operation of the protection feature programmed is controlled by the setting in group 2.
9. Change setpoint
SETPOINTS \ S7 CONTROL \ SETPOINT GROUPS \ ACTIVE SETPOINT GROUP
to Group 1. The LED
on the faceplate should now indicate the relay is using setpoint group 1.
10. Check that the operation of the protection feature programmed is controlled by the setting in group 1.
11. Assert logic input Setpoint Group 2, and check that the LED indicator shows Setpoint Group 2.
12. Assert logic input Setpoint Group 3, and check that the LED indicator shows Setpoint Group 3.
13. Assert logic input Setpoint Group 4, and check that the LED indicator shows Setpoint Group 4.
14. De-assert logic input Setpoint Group 4, and check that the LED indicator shows Setpoint Group 3.
15. De-assert logic input Setpoint Group 3, and check that the LED indicator shows Setpoint Group 2.
16. De-assert logic input Setpoint Group 2, and check that the LED indicator shows Setpoint Group 1.
17. Check that the changing of setpoint groups is placed in the event recorder.
If setpoint BREAKER OPEN INHIBIT is to be Enabled
1. Assert a breaker state logic input so that the relay determines the breaker is closed.
2. Assert logic input Setpoint Group 2. The faceplate LED should indicate the relay is using setpoint group 2.
3. De-assert the breaker state logic input so that the relay determines the breaker is open.
4. De-assert logic input Setpoint Group 2. The LED on the faceplate should indicate the relay is still using set-
point group 2.
5. Assert the breaker state logic input so that the relay determines the breaker is closed.
6. The LED on the faceplate should indicate the relay is now using setpoint group 1.
NOTE

GE 750 Specifications

General

Brand	GE
Model	750
Category	Relays
Language	English