13
Optionally, the radio tray can be fitted with
a FS operator control panel on the reverse
side as shown in Figure 9: FS operator
control panel. The FS control panel is an
accessory to the RCU. A FS control panel
fitted to a RCU provides a local operator
with the ability to send trip, close and
protection controls and view the current
state of the Fusesavers connected to the
RCU by short-range radio. The FS control
panel is fitted inside the RCU and can be
accessed by the operator when the RCU
door is open.
Power supply isolation unit
Power supply isolation unit (MLFB part
3AD8800-3AX1350-8B) is an optional
accessory that provides a double pole point
of isolation for the electronics housing and
the enclosure heater. Where an isolator is
fitted, the incoming auxiliary power is
connected to the isolator and the isolator
provides sockets for the electronics
assembly and for the heater.
The isolation unit is required if:
The RCU is mains powered and if it is
preferred to provide a point of isolation
inside the enclosure for changing the
electronic housing. Note that the user
will still need to provide a point of
isolation for the wiring to the RCU.
An enclosure heater is fitted.
Figure 9: Fusesaver operator control panel
Item
Description
A
Radio tray (behind
control panel)
B
Fusesaver operator
control panel
C
Fusesaver operator
control panel
connected to expansion
interface
A
B
Figure 10: Power supply isolation unit
Item
Description
A
Incoming supply cable
B
Outgoing connection to RCU electronics housing (10 A IEC outlet)
C
Outgoing connection to enclosure heater (10 A IEC outlet)
D
Toggle switch
A
B
C
D
The isolation unit is not an applicable option
for a solar powered RCU.
For discussion of connection of auxiliary
power supply, refer to Auxiliary power
supply on page 30.
C
A
B
