GE D30 Instruction Manual page 329

CHAPTER 5: SETTINGS
3. All the LEDs are turned on with the orange color. One LED at a time turns off for one second, then back on. The test
routine starts at the top left panel moving from top to bottom for all 14 LEDs. Then the eight pushbutton LEDs are
tested in the same manner. This test checks for hardware failures that lead to more than one LED being turned off
from a single logic point. This stage can be interrupted at any time.
4. Additionally, stages 2 and 3 are repeated twice for the five device status LEDs and nine event cause LEDs, one time
with green color on and the other with red color on.
When testing is in progress, the LEDs are controlled by the test sequence, rather than the protection, control, and
monitoring features. However, the LED control mechanism accepts all the changes to LED states generated by the relay
and stores the actual LED states (on or off) in memory. When the test completes, the LEDs reflect the actual state resulting
from relay response during testing. The reset pushbutton does not clear any targets when the LED Test is in progress.
A dedicated FlexLogic operand,
the LED TEST INITIATED event is stored in the event recorder.
The entire test procedure is user-controlled. In particular, stage 1 can last as long as necessary, and stages 2 and 3 can be
interrupted. The test responds to the position and rising edges of the control input defined by the
setting. The control pulses must last at least 250 ms to take effect. The following diagram explains how the test is
executed.
Application example 1
Assume one needs to check if any of the LEDs is "burned" through user-programmable pushbutton 1. Apply the following
settings.
Configure user-programmable pushbutton 1 by making the following entries in the
PROGRAMMABLE PUSHBUTTONS  USER PUSHBUTTON 1
D30 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
PROGRESS, is set for the duration of the test. When the test sequence is initiated,
LED TEST IN
Figure 5-50: LED test sequence
menu. (The option does not display when not purchased.)
PRODUCT SETUP
LED TEST CONTROL
SETTINGS  PRODUCT SETUP  USER-
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