M7 Testing; Force Leds - GE 339 Instruction Manual

M7 TESTING

M7 Testing
Tests Test Mode Faceplate
All Test = Disabled
Disabled
Force LED = Enabled
Enabled
Force Output = Enabled
Enabled
All Test = Enabled
Enabled
Force LED = Enabled
Enabled
Force Output = Enabled
Enabled
All Test = Enabled
Enabled
NOTE:
NOTE

Force LEDs

7–22
The Test Mode for 3 Series relays consists of testing front panel LEDs and Outputs Relays
The test mode state is indicated on the relay faceplate by a combination of the
Maintenance LED (faceplate option E), the In-Service LED, the Trouble LED, and the critical
fail relay, as shown in the following table.
Output Relay
Option setting
E, L Normal
operation
E Normal
operation
E Controlled from
Test settings
E Controlled from
Test settings
L Normal
operation
L Controlled from
Test settings
L Controlled from
Test settings
The following cases should be considered when using Test Mode:
1. When the relay is tripped, Test Mode cannot be Enabled.
Changing Force LEDs or Force Output Relays to "Enabled" will have no effect. The
value "Enabled" will not be accepted, and the value "Disabled" will be kept.
2. If the relay is in Force LEDs test mode, and trips, the relay leaves Test Mode and the
Force LEDs setting automatically changes to "Disabled".
Performing tests such as Forcing Output Relays should be carefully planned. Fault
conditions are not detected by the relay while in Force Output Relays mode, since the
protection and control elements are not operational during this mode.
The LED lamp test is allows you to turn on each front panel LED individually. Testing the
LEDs is only available from the relay front panel.
The following path is available using the keypad. For instructions on how to use the
keypad, please refer to Chapter 3 - Working with the Keypad.
PATH:
MAINTENANCE > M7 TESTING > FORCE LEDS
FORCE LEDS
Range: Disabled, Enabled
Default: Disabled
When the Force LEDs setpoint is set to Enabled, the relay Maintenance LED starts
flashing (faceplate option E), the In-service LED turns off, and the Critical Failure Relay is
de-energized, indicating the relay is in test mode.
LED 1(12)
Range: Off, On
Default: Off
In-Service Trouble Maintenance
LED LED LED
Not Not Not affected
affected affected
Blinking Not Off
GREEN affected
Off Blinking On
Orange
Off Blinking Off
Orange
Blinking Not Off
GREEN affected
Off Blinking Off
Orange
Off Blinking Off
Orange
339 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 7: MAINTENANCE
Critical fail relay Prot. & Control
(output 7) elements
Normal Normal
operation operation
Energized Normal
operation
De-energized Not operational
De-energized Not operational
Energized Normal
operation
De-energized Not operational
De-energized Not operational