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

Performance and
functionality
Mechanical interlocking
Electrical interlocking of two or three
devices is used to create a remoteoperated
source-changeover system. A
mechanical interlocking system enhances
the reliability of system operation.
To ensure a continuous supply of power, certain electrical installations are
connected to two power supplies:
c A normal supply N;
c A replacement supply R which supplies the installation when source N is not
available.
A source-changeover system switches between the two supplies. The system may
include an automatic controller which manages switching according to external
conditions. A source-changeover system may comprise two or three circuit
breakers or switch-disconnectors.
Interlocking of two devices using connecting rods
The two devices must be stack mounted.
This function requires:
c An adaptation fixture on the right side of each device.
c A set of connecting rods with no-slip adjustments.
The complete interlock kit is supplied for assembly by the customer.
Maximum vertical distance between the fixing planes: 900 mm
Combinations of Masterpact Normal and Replacement devices
The two devices must both be fixed devices or drawout devices to maintain correct
alignment of the mechanisms.
Interlocking of two or three devices using cables
Using cables, the devices may be stack mounted or installed side-by-side.
Interlocking of two devices
This function requires:
c An adaptation fixture on the right side of each device.
c A set of cables with no-slip adjustments.
Maximum distance between the fixing planes (vertical or horizontal): 2000 mm
Interlocking of three devices
This function requires:
c An adaptation fixture (different for each type of interlocking) on the right side of
each device.
c Three sets of cables with no-slip adjustments.
Maximum distance between the fixing planes (vertical or horizontal): 1000 mm
Installation
The complete interlock kit is supplied for assembly by the customer.
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