GE Feeder Management Relay 750 Instruction Manual page 174

5.8 S7 CONTROL
The
DEAD BUS MAX VOLTAGE
transfers are inhibited. A normal setting for this element is about 0.25 of pickup of nominal voltage. Because the 750/
760 measures a single phase-phase voltage, these values should be multiplied by 1/
ground fault on a measured phase reducing that phase voltage but leaving the other two phases at a higher voltage. If
experience shows this setpoint causes a delay of transfer presenting problems, it is occasionally raised to a maximum
of 0.40 of pickup. The user establishes all other setpoints for this element.
The Logic Inputs for Incomers 1 and 2 and the Bus Tie relays are programmed as follows. Note that the input number
matches the wiring shown on the DC schematics. It is not necessary that the specific inputs are programmed as shown, but
field connections must match the logic functions.
If logic inputs identified as optional on the schematics and the following table are not required, they can be pro-
grammed to perform other functions. The Message Mode may be programmed to Disabled or Self Reset.
NOTE
Table 5–17: LOGIC INPUTS FOR INCOMER 1, 2, AND BUS TIE RELAYS
INPUT INCOMER #1
1 Name:
Asserted Logic:
2 Name:
Asserted Logic:
5
3 Name:
Asserted Logic:
4 Name:
Asserted Logic:
5 Name:
Asserted Logic:
6 Name:
Asserted Logic:
7 Name: Undervoltage On Other
Source
Asserted Logic:
8 Name: Incomer 2 Breaker Closed
Asserted Logic:
9 Name: Tie Breaker Connected
Asserted Logic:
10 Name: Tie Breaker Closed
Asserted Logic:
11 Name:
(optional) Asserted Logic:
12 Name: Transformer Lockout
(optional) Asserted Logic:
13 Name:
Asserted Logic:
(optional)
5-110
Courtesy of NationalSwitchgear.com
and
DEAD LINE MIN VOLTAGE
INCOMER #2
Local Mode Name:
Contact Open Asserted Logic:
Contact Close
Open | Von
Open | Voff
Closed | Von
Closed | Voff
Remote Close Name:
Contact Open Asserted Logic:
Contact Close
Open | Von
Open | Voff
Closed | Von
Closed | Voff
Remote Open Name:
Contact Open Asserted Logic:
Contact Close
Open | Von
Open | Voff
Closed | Von
Closed | Voff
52a or 52b Contact Name:
Contact Close Asserted Logic:
Breaker Connected Name:
Contact Close Asserted Logic:
Selected To Trip Name:
Contact Open Asserted Logic:
Contact Close
Name:
Contact Close Asserted Logic:
Name:
Contact Close Asserted Logic:
Name: Tie Breaker Connected
Contact Close Asserted Logic:
Name: Tie Breaker Closed
Contact Close Asserted Logic:
Block Transfer Name:
Contact Open Asserted Logic:
Contact Close
Name:
Contact Open Asserted Logic:
Contact Close
Source Trip Name:
Contact Open Asserted Logic:
Contact Close
750/760 Feeder Management Relay
setpoints establish the level of decayed voltage above which
BUS TIE
Local Mode Name:
Contact Open Asserted Logic:
Contact Close
Open | Von
Open | Voff
Closed | Von
Closed | Voff
Remote Close Name:
Contact Open Asserted Logic:
Contact Close
Open | Von
Open | Voff
Closed | Von
Closed | Voff
Remote Open Name:
Contact Open Asserted Logic:
Contact Close
Open | Von
Open | Voff
Closed | Von
Closed | Voff
52a or 52b Contact Name:
Contact Close Asserted Logic:
Breaker Connected Name:
Contact Close Asserted Logic:
Selected To Trip Name:
Contact Open Asserted Logic:
Contact Close
Undervoltage On Other Name:
Source Asserted Logic:
Contact Close
Incomer 1 Breaker Closed Name:
Contact Close Asserted Logic:
Name: Close From Incomer 2
Contact Close Asserted Logic:
Name:
Contact Close Asserted Logic:
Block Transfer Name:
Contact Open Asserted Logic:
Contact Close
Transformer Lockout
Contact Open
Contact Close
Source Trip
Contact Open
Contact Close
5 SETPOINTS
3 to cover the case of a phase-
Local Mode
Contact Open
Contact Close
Open | Von
Open | Voff
Closed | Von
Closed | Voff
Remote Close
Contact Open
Contact Close
Open | Von
Open | Voff
Closed | Von
Closed | Voff
Remote Open
Contact Open
Contact Close
Open | Von
Open | Voff
Closed | Von
Closed | Voff
52a or 52b Contact
Contact Close
Breaker Connected
Contact Close
Selected To Trip
Contact Open
Contact Close
Close From Incomer 1
Contact Close
Incomer 1 Breaker Closed
Contact Close
Contact Close
Incomer 2 Breaker Closed
Contact Close
Block Transfer
Contact Open
Contact Close
GE Multilin