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Functions and
characteristics
Source-changeover systems
Remote-operated and automatic source-
changeover systems
Coupling accessory on base plate
Remote-operated systems
It is made up of two devices with motor mechanisms, mounted on a base plate and
combined with:
an electrical interlocking unit
b
optional mechanical interlocking system.
b
Electrical interlocking unit (IVE)
Interlocks two devices equipped with motor mechanisms and auxiliary contacts.
The IVE unit is mandatory to ensure the necessary time-delays required for safe
switching.
Mechanical interlocking system
The mechanical interlocking system is strongly recommended to limit the effects of
design or wiring errors and to avoid manual switching errors.
Automatic systems
An automatic controller can manage switching from one source to the other.
The controller can be:
a device provided by the customer
b
an integrated BA controller
b
an integrated UA controller.
b
An integrated BA or UA automatic controller manages source transfer according to
user-selected sequences that can include source priorities, start-up of a generator,
return to the Normal source, etc. An ACP auxiliaries control plate facilitates
installation of the BA and UA controllers. The plate includes two circuit breakers to
protect the control circuits and two contactors to control the motor mechanisms of
the devices.
Coupling accessory on base plate
This accessory may be used with a manual or remote-operated source-changeover
system (with or without an automatic controller). It respects the mounting distance
between the devices secured to the ACP plate and provides downstream coupling of
the two sets of busbars. It is compatible with standard device accessories.
The short terminal shields of the device can be installed on the upstream connectors
of the coupling accessory. Downstream, it is possible to use the connection
accessories and the long or short terminal shields of the device.
PB103832-51
Remote-operated source-changeover system.
DB112197
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Circuit breaker QN equipped with a motor mechanism and
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Circuit breaker QR equipped with a motor mechanism and
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Base plate with mechanical interlocking
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Electrical interlocking unit IVE
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DB112199
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Standard device accessories may be used for the coupling
accessory on the base plate.
1
Short terminal shields
2
Terminals
3
Interphase barriers
4
Long terminal shields
559E1700.indd
version: 1.0