Date Code 20010719
701 Motor Protection Relay
Maintenance & Troubleshooting
Real-Time Clock Battery Replacement
10.9
Real-Time Clock Battery Replacement
A lithium battery powers the relay clock (date and time) if the external power
source is lost or removed. The battery is a 3 V lithium coin cell, Rayovac No. BR2335
or equivalent. At room temperature (25°C), the battery will operate nominally for 10
years at rated load. When the relay is powered from an external source, the battery only
experiences a low self-discharge rate. Thus, battery life can extend well beyond the
nominal 10 years because the battery rarely has to discharge after the relay is installed.
The battery cannot be recharged.
If the relay does not maintain the date and time after power loss, or if the relay
self-tests indicate an RTC Battery Warning, replace the battery following the steps
listed below.
!
CAUTION:
The relay contains devices sensitive to Electrostatic
Discharge (ESD). When working on the relay with the front panel
removed, work surfaces and personnel must be properly
grounded or equipment damage may result.
Step 1.
Deenergize the relay.
Step 2.
Remove two front-panel retaining screws with a Phillips screwdriver
from the relay front panel. Carefully remove the relay front panel
from the relay chassis.
!
CAUTION:
Removal of enclosure panels exposes circuitry which
may cause electrical shock which can rersult in injury or death.
Step 3.
The relay main board and display are attached to the inside of the
relay front panel. The battery is located on the upper left-hand side of
the relay main board. Carefully remove the battery from beneath the
clip. Properly dispose of the old battery; it is not rechargeable.
Step 4.
Install the new battery with the positive (+) side of the battery
facing up.
Step 5.
Carefully replace the relay front panel on the relay chassis. Install and
tighten the front-panel retaining screws with a Phillips screwdriver.
!
WARNING:
Be sure to carefully align the front panel with
the relay chassis during reassembly. If the front panel is not
well aligned with the chassis, you may bend connector pins,
causing the relay to fail.
Step 6.
Reenergize the relay. Set the relay date and time using the front-panel
Set Relay\Date and Set Relay\Time functions.
Summary of Contents for SEL-701
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