GE 845 Instruction Manual page 132

SETPOINTS MAIN MENU
NOTE:
4–4
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.
Example 2: Programming an IOC1 element to "Alarm"
These same steps also apply if the element is programmed to "Latched Alarm" or
"Configurable".
1. Select Alarm from the list of selections available for the setpoint "Function"
2. If necessary, select the output relays to operate as an Alarm upon IOC1 operation.
To distinguish the element functionality upon function selection, and to prevent the
user from making programming mistakes, a mechanism affecting the output relays
selected for breaker tripping is implemented and will activate upon changing the
function from Disabled to Alarm, Latched Alarm, or Configurable.
– The output relays selected for tripping of the breakers will be de-activated in the
IOC1 element menu. The rest of the outputs are fully programmable and
operational.
– The setting for these trip selected output relays can be changed, i.e. from "Do Not
Operate" to "Operate", but the physical relay will not be energized. This is to
prevent the user to operate the trip output relay by mistake, when the function is
used as Alarm, or Configurable.
Changing the function back to be fully "Trip", will enable the breaker trip selected
output relays from the IOC1 menu to be programmable.
From 845 PC Program: Element Menu or Protection Summary
Using the 845 PC program, there are two places where the menu of each protection,
control, or monitoring element can be accessed: The element's individual menu, and the
Protection Summary menu.
Element Menu - The element function can be set as Trip, Alarm, Latched Alarm, or
Configurable. Depending on the selected function, the relay applies the following rules:
Example 1: Programming an IOC1 element as a Trip function
1. Select Output Relays 1 and 2 to trip breaker 1 and 2 respectively.
845 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 4: SETPOINTS