59 / 182
version: 10.1
207E2300.indd
A-45
Two solutions are available for remote operation of
Masterpact devices:
b
a point-to-point solution
b
a bus solution with the COM communication option.
The remote ON / OFF function is used to remotely open and close the circuit breaker.
It is made up of:
an electric motor MCH equipped with a “springs charged” limit switch contact CH
b
b
two voltage releases:
b
b
a closing release XF
v
v
an opening release MX.
v
v
Optionally, other functions may be added:
a “ready to close” contact PF
b
b
an electrical closing pushbutton BPFE
b
b
remote RES following a fault.
b
b
A remote-operation function is generally combined with:
device ON / OFF indication OF
b
b
“fault-trip” indication SDE.
b
b
Wiring diagram of a point-to-point remote ON / OFF function
PB104349A68
Note:
an opening order always takes priority over a closing
order.
If opening and closing orders occur simultaneously, the
mechanism discharges without any movement of the main
contacts. The circuit breaker remains in the open position
(OFF).
In the event of maintained opening and closing orders, the
standard mechanism provides an anti-pumping function by
blocking the main contacts in open position.
Anti-pumping function. After fault tripping or intentional
opening using the manual or electrical controls, the closing
order must first be discontinued, then reactivated to close the
circuit breaker.
When the automatic reset after fault trip (RAR) option is
installed, to avoid pumping following a fault trip, the automatic
control system must take into account the information supplied
by the circuit breaker before issuing a new closing order or
blocking the circuit breaker in the open position (information on
the type of fault, e.g. overload, short-time fault, earth fault,
earth leakage, short-circuit, etc.).
Note:
MX communicating releases are of the impulse type
only and cannot be used to lock a circuit breaker in OFF
position. For locking in OFF position, use the remote tripping
function (2nd MX or MN).
When MX or XF communicating releases are used, the third
wire (C3, A3) must be connected even if the communication
module is not installed. When the control voltage (C3-C1 or
A3-A1) is applied to the MX or XF releases, it is necessary to
wait 1.5 seconds before issuing an order. Consequently, it is
advised to use standard MX or XF releases for applications
such as source-changeover systems.
DB111783
Wiring diagram of a bus-type remote ON / OFF function
DB402067
COM
Remote operation
Remote ON / OFF