ABB RER620, Technical Manual

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Section 9
Other functions
RER620 423
Technical Manual
Section 9 Other functions
9.1 Uninterruptible Power Supply UPS
9.1.1 Function block
Figure 219: UPS function block
9.1.2 Functionality
The RER620 UPS (Uninterruptible Power Supply) is a subsystem for the RER620 recloser
controller. It is implemented in a separate case (see Figure 220) and is powered by the
control power which may be AC or DC. The UPS can operate over a wide range of control
voltages.
The main UPS function is to enable operation of the RER620 after the loss of control
power for a period of time that depends on the amp hour rating of the battery. A 12 amp
hour battery will power the total system for about 38 hours with a standard load. The
RER620 UPS incorporates a battery management system that includes both battery
charging and battery test functions.
The RER620 UPS case includes an auxiliary power output that may be used to power a
modem, radio, etc.
There is also a voltage boost function integrated into the RER620 UPS system that
provides up to 250Vdc. This power source, in combination with an external capacitor, is
used to operate a variety of magnetic actuators.
The UPS incorporates a high current dry contact output that is temperature controlled. This
output can be used to switch on and off the low-voltage-cabinet heater.
The RER620 UPS is microprocessor controlled and is capable of external communications
through its communications port. The main purpose for this communication is to receive
instructions from the RER620 Control and to transmit status, and battery test results to the
RER620 Control.
ZBAT1
START_TST AC_LOSS
TST_RESULT
CVD_CLP_A
CVD_CLP_B
CVD_CLP_C