Maintenance Procedures; Periodic Maintenance Tests; Using Remote Or Local Data Communication; Using Man-Machine Interface - ABB REL 301 Instruction Leaflet

I.L. 40-386.1
and L
description of the displayed fault data quantities.
The significant quantities to review are"
Fault Type — "FLT Type" "AG"
Targets
Fault Voltages (VA, VB, VC, 3V0) and Currents (IA, IB, IC, IP)
Pressing the front panel R
"METER" display and the LEDs will stop flashing.
Receipt of the pilot signal can be simulated from the front panel as in Part a above. Using
the procedure outlined in Step 5, press the S
selected. Displayed is the result of the self-test routine which should show a normal status,
"Status" "0".
Pressing the R
simulates the receipt of the permissive signal. While depressing the E
again apply an AG fault. The REL 302 should trip as in the test above as though voltage is
applied to the Receiver 1 input.
c. Repeat the tests in Part b. Above except using the Receiver 2 input by applying rated dc
voltage to terminals T
This completes the REL 302 Pilot Acceptance Test.
5. 3.

MAINTENANCE PROCEDURES

NOTE:
5.3.1

Periodic Maintenance Tests

5.3.1.1

Using Remote or Local Data Communication

• Read Metering Values
• Read Diagnostic Information
• Monitor Relay Failure Indication
• Remotely test Output Relay (Trip, Close, etc.)
• Check for Failure Alarm via annunciator or network
• Change real-time clock battery. (See Figure 5-3 for location.) Use a lithium type battery such
as Ray O' Vac #BR2016.
5.3.1.2

Using Man-Machine Interface

• Use the front display, and push-buttons to manually perform the tests described in Section
5.3.1.1 above.
5.3.1.3

Routine Visual Inspection

With the exception of routine visual inspection, the REL 301/302 relay assembly should be
maintenance free for one year. A program of routine visual inspection should include:
• Condition of cabinet or other housing
• Tightness of mounting hardware
5-14
push-buttons the complete fault record can be reviewed. See Table 4-3 for a
OWER
— "Pilot G" "YES"
ESET
push-button, scroll to "Rx1" display. Pressing the E
AISE
4-13(+) and T
B
It is NOT recommended to perform any type of invasive periodic maintenance
test (requiring relay disassembly).
push-button will cause the LCD display to switch to the
push-button until the "TEST" mode is
ELECT
4-14(-). In the front panel test substitute "Rx2".
B
push-button
NTER
push-button,
NTER