ABB BCU-02 3AUA0000110429 Communication unit
Cabinet Design
The AC supply connections to the incoming
supply section can be made by cables or busbars
from the bottom of the cabinet. As standard, the
AC supply is connected with cables from the
bottom of the cabinet. The other connections
are available as options.
The cabinet is classified to IP 20/21 as standard
(Drive-MNS-cabinet).
Basic Design
Rated voltage: 400 V, 500 V, 600 V, 690 V
Rated frequency: 50 Hz or 60 Hz
Rated current: 1000 A, 2000 A, 3000 A,
4000 A (on request)
Short circuit ratings: 50 kA (1 sec.)
i
dyn= 105 kA (peak)
Options
EMC
• Cabinet design according to EMC-regulations
Incoming Breaker
As standard, the incoming breaker is constructed
with:
• a fixed version
• manually operated by using pushbuttons in the
breaker
• closing springs charged manually by using the
front lever
• an overload and overcurrent protection using
the analogue solid state overcurrent release
As options the breaker has:
• a draw out version
• a motor for the automatic charging of closing
springs
• a shunt opening and closing release for remote
control of the breaker
• auxiliary contacts

Isolation Switch
Most applications require only an isolation switch.
This design would not be able to interrupt the
load current. It is meant only to isolate the circuit
from the main supply.
As standard, there is a pushbutton on the door of
the incoming supply section. With the pushbutton
it is possible to open a supply circuit breaker
before opening the isolation switch. There is also
an auxiliary contact on the isolation switch, used
for opening the supply circuit breaker.
As an option it is possible to use an electrical
interlock between the switch and a supply circuit
breaker. The isolation switch therefore requires
an electrical coil.
Earthing switch
For safety reasons an earthing switch will ground
the AC busbars to earth.
Earth Fault Protection
Insulation monitor (voltage sensitive).
AC Current Measurement
AC Voltage Measurement
Arc Detecting Relay
An arc detecting relay is used in the incoming
cabinet to supervise the AC busbars. It is possible to use the arc detecting relay in combination
with a current detector to eliminate false trips.
Emergency stop relays, tripping circuits,
APC+other options
This depends on the specific application and is
determined independently for each case.
Dimensions
Refer page 15 table 3.