Targets Menu; Target Messages; Relay Self-Tests - GE C70 Instruction Manual

CHAPTER 7: COMMANDS AND TARGETS

7.2 Targets menu

Each C70 element with a TARGET setting has a target message that when activated by its element is displayed in sequence
with any other currently active target messages in the
Element 48 target settings are active and so have their targets displayed. The down arrow below the two elements
indicates that there can be other active elements beyond these two.
For more information, see the description of target messages in the next section, and the Introduction to Elements section
in the Settings chapter for instructions on TARGET setting.
When no targets are active, the display reads

7.2.1 Target messages

When there are no active targets, the first target to become active causes the display to immediately default to that
message. If there are active targets and the user is navigating through other messages, and when the default message
timer times out (i.e. the keypad has not been used for a determined period of time), the display again defaults back to the
target message.
The range of variables for the target messages is described below. Phase information is included if applicable. If a target
message status changes, the status with the highest priority displays.
Table 7-1: Target message priority status
Priority Active status
1 OP
2 PKP
3 LATCHED
If a self test error is detected, a message appears indicating the cause of the error. For example UNIT NOT PROGRAMMED
indicates that the minimal relay settings have not been programmed.

7.2.2 Relay self-tests

7.2.2.1 Description
The relay performs a number of self-test diagnostic checks to ensure device integrity. The two types of self-tests (major
and minor) are listed in the following tables. When either type of error occurs, the Trouble LED Indicator turns on and a
target message displays. All errors record an event in the event recorder. Latched errors can be cleared by pressing the
key, providing the condition is no longer present.
RESET
Major self-test errors also result in the following:
• The critical fail relay on the power supply module de-energizes
• All other output relays de-energize and are prevented from further operation
C70 CAPACITOR BANK PROTECTION AND CONTROL SYSTEM – INSTRUCTION MANUAL
TARGETS

PHASE TOC4

OP: A B -
DIGITAL ELEMENT 48:

LATCHED


menu. In the example shown, the Phase TOC4 and Digital
TARGETS
.
NO ACTIVE TARGETS
Description
element operated and still picked up
element picked up and timed out
element had operated but has dropped out
Displayed only if targets for this element are active.
Example shown.
Displayed only if targets for this element are active.
Example shown.
TARGETS MENU
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