GE 845 Instruction Manual page 107

CHAPTER 4: SETPOINTS
..\Breakers\Breaker
Item Name Value
Name BKR
Contact Input 52a Off
Contact Input 52b Off
Connected Off
Trip Relay Select Relay
Close Relay Select Off
BKR
NOTE:
845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
PATH:
SETPOINTS > SYSTEM > BREAKER 1 (2, 3)
..\Breakers\Breaker
Unit Item Name
Name
Contact Input 52a
Contact Input 52b
Connected
Trip Relay Select
Close Relay Select
BKR
From these screens,
Relay 1
tripping Breaker 1, Breaker 2, and Breaker 3 respectively. Output relays for closing the
breakers are not selected. The user can program any output relay from the list of output
relays for breaker tripping, or closing.
PROTECTION ELEMENT TRIP SELECTIONS
Selective tripping of the transformer breakers from the protection element can be
programmed from two places:
• From the Relay HMI: Protection Element Menu
• From the 845 PC program: Element's Menu or Protection Summary
From the Relay HMI: Protection Element Menu
If Trip is selected as a "Function" for an element, and upon operation of that element, the
LED "TRIP" will turn on. Similarly when Alarm, or Latched Alarm is selected, upon element
operation, the LED "ALARM" will turn on. Selecting the "Configurable" setting is not
associated with an LED.
Example 1: Programming an IOC1 element as a Trip function
1. Select Trip from the list of selections available for the setpoint "Function"
2. Select the output relays for tripping the breakers, and any other aux relays if
necessary.
Selecting Trip as a function, does not automatically change the values of the breaker trip
selected output relays to "Operate" from the menus of the protection, control or
monitoring elements. Regardless of the selected element function, the values for all output
relays from the menu elements will show "Do Not Operate". The user must select the
desired output relays to be energized upon element operation.
..\Breakers\Breaker 3
Value Unit Item Name
BKR Name
Off Contact Input 52a
Off Contact Input 52b
Off Connected
Relay Trip Relay Select
Off Close Relay Select
BKR3
, , and are selected as default outputs for
Relay 2 Relay 9
SETPOINTS MAIN MENU
Value Unit
BKR 3
Off
Off
Off
Relay 9
Off
4–3