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3
A
B
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4–39
Operation and Interface – 4
4.7
M-3410A Battery
Replacement
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CAUTION:
Personnel performing this procedure
should be trained in Electrostatic Discharge
prevention to prevent damage to ESD sensitive
components. Check and comply with appropriate
regulations regarding the disposal of lithium
batteries.
8
WARNING: Operating personnel must not
remove the cover or expose the printed circuit
board while power is applied. IN NO CASE may
the circuit-based jumpers be moved with power
applied.
8
WARNING: Dangerous voltages may exist
even when power is disconnected! Power must
be removed, and circuits discharged, before
working on the unit.
8
WARNING: The protective grounding terminal
must be connected to earth any time external
connections have been made to unit.
8
8
8
8
8
WARNING: DO NOT open live CT circuits.
Live CT circuits should be shorted prior to
disconnecting CT wiring to the M-3410A. Death
or severe electrical shock can occur.
1.
Remove power, current, and potential
inputs from the relay.
2.
Remove the screws that retain the rear
cover, lift the rear cover off the relay.
8
WARNING: The protective grounding terminal
must be connected to an earth line any time
external connections have been made to unit.
3.
Remove the six screws that retain the
CPU board to the I/O board.
4.
Disconnect the CPU board from the I/O
board by pulling the board away from
the I/O board. Moderate force will be
needed to accomplish this.
8
WARNING: Danger of explosion if battery is
incorrectly replaced!
5.
Remove the old battery from the CPU
board and replace with a fresh CR 2032
(Beco #430-00402) or equivalent.
6.
Reinstall the CPU board onto the I/O
board by reversing the removal process.
7.
Insert the six screws that retain the
CPU board to the I/O board.
8.
Reinstall the rear cover on the relay;
insert the screws that retain the rear
cover.
9.
Reapply power, current, and potential
inputs to the relay.
10.
Reset unit time and date (from the
Relay
menu, select
Set Date/Time
).
11.
Verify proper operation of the relay.
12.
Properly dispose of battery, following
local requirements.
Summary of Contents for Syncrocloser M-3410A
Page 1: ...Instruction Book M 3410A Intertie Generator Protection Relay ...
Page 39: ...xiv M 3410A Instruction Book This Page Left Intentionally Blank ...
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