BAT7001 Version 2 USER MANUAL ISSUE 1
-2-
Transformers (to be specified) being used
for protection purposes. See Schematic
Drawing RELE002, Page 4.
The BAT7001 Power Supply provides two
independent DC supplies. The main supply
is 48VDC unregulated and is used for the
trip supply of a circuit breaker. The
auxiliary supply is a regulated 48VDC,
400mA supply and is suitable for the
supply of protection relays.
The BAT7001 Power Supply is available
in 1A or 5A units to suit the type of current
transformer used in the installation.
The main output supply is automatically
disconnected when the output voltage falls
below an internally preset level of 25 volts
and is restored when the voltage rises to
the second internally preset level of 48
volts. In the event that the circuit
breaker does not open successfully on
the first discharge the BAT7001 Power
Supply automatically recharges and re-
applies the trip supply to the circuit
breaker until it opens.
To enable the unit to be used in hazardous
locations (such as underground coal mines)
the output voltage is guaranteed to self
discharge (even when no load is connected
to the supply) following the removal of
power from the unit. The output voltage
typically falls to less than 3 volts after 2
minutes and less than 0.5 Volts after 4
minutes.
The BAT7001 Power Supply is housed in
a standard aluminium flush mounted case
(see Drawing RELA010, Page 5 for case
details).
2.1 LED Indication
There are two LEDs mounted on the front
plate.
Supply –green LED which flashes when
an input is present (voltage or current or
both).
Output –red LED that flashes when the
main output DC voltage is healthy.
3. Commissioning
The following steps must be followed to
ensure the correct operation of the BAT
7001 Power Supply:
1. It is essential that the electric circuit to
the circuit breaker trip coil is wired
through a normally open (N/O) circuit
breaker auxiliary contact. This will
ensure that the trip circuit is broken as
the circuit breaker opens and therefore
prevent the BAT 7001 Power Supply
from attempting unnecessary re-strikes
on the trip coil.
Breaking the trip circuit with the
auxiliary contact is the usual practice
however it is essential in the case
where the protection relay latches its
output tripping contact.
2. Check the 110VAC supply on
terminals 11 and 12.
3. Insert the BAT 7001 Power Supply
into the panel and tighten the slotted
holding screws.
4. Apply power and check that the output
voltage between terminals 7 (+ve) and
8 (-ve) is approximately 50VDC.
Check that the output voltage between
terminals 10 (+ve) and 9 (-ve) is 48V
DC.
5. Simulate a trip condition by operating
the protection relay or by bridging its
output tripping contact. The circuit
breaker should trip immediately.
