LV power air circuit breakers and switch-disconnectors ... - Piti Group

Performance and
functionality
Remote operation
Remote ON / OFF
Two solutions are available for remote
operation of Masterpact devices:
c A Hard wired solution.
c A bus solution with the ‘COM’
communication option.
The remote ON / OFF function is used to remotely open and close the circuit
breaker. It comprises:
c A gear motor (MCH) equipped with a ‘springs charged’ limit switch contact (CH).
c Two voltage releases:
v A closing release (XF).
v An opening release (MX).
Optionally, other functions may be added:
c A ‘ready to close’ contact (PF).
c An electrical closing pushbutton (BPFE).
c Remote reset following a fault (RAR).
A remote-operation function is generally combined with:
c Device ON / OFF indication (OF).
c ‘fault-trip’ indication (SDE).
Wiring diagram of a point-to-point remote ON / OFF function
spring
charged
opening
order
closing
order
ready
to close
fault
open
closed
B3
B2
C2
A2
252 254
82 84
12 14
MCH
PF
OF1
MX
XF
SDE
CH
B1
C1
A1
251
81
11
Wiring diagram of a bus-type remote ON / OFF function
spring
charged
opening
order
closed
order
B3
B2
C2
C3
A2
A3
MCH
CH
MXcom
XFcom
Note:
An opening order always takes priority over a closing
order.
If opening and closing orders occur simultaneously(when
in the open position), 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 maintaining the main contacts in the open
position.
After tripping or opening using the manual or electrical
controls, the closing coil must first be reset before reclosing
can take place.
When the ‘automatic reset after fault trip (RAR)’ option is
installed, it is impotant to ensure that the automatic/
remote closing system is designed to prevent Autoreclosing
under fault trip conditions.
B1
OF
PF
SDE
CH
C1
A1
COM
supervisor
(i.e. PowerLogic software)
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