Installation guide
A-16
Functions
and characteristics
Electrical interlocking is used with the mechanical
interlocking system. It electrically interlocks the two
circuit breakers and implements the time delays
required for proper operation of the system.
An automatic controller may be added to take into
account information from the distribution system.
Electrical interlocking is carried out by an electrical control device.
For Compact NS up to 630 A, electrical interlocking is implemented by the IVE unit
integrating control circuits and an external terminal block. The integrated control
circuits implement the time delays required for correct source transfer.
For Compact NS630b to 1600 and Masterpact, this function can be implemented in
one of two ways:
using the IVE unit
by an electrician based on the diagrams presented in the “Electrical diagrams” part
of this catalogue.
Characteristics of the IVE unit
external connection terminal block:
inputs: circuit breaker control signals
outputs: status of the SDE contacts on the “Normal” and “Replacement” source
circuit breakers
2 connectors for the two “Normal” and “Replacement” source circuit breakers:
inputs:
- status of the OF contacts on each circuit breaker (ON or OFF)
- status of the SDE contacts on the “Normal” and “Replacement” source circuit
breakers
outputs: power supply for operating mechanisms
control voltage:
24 to 250 V DC
48 to 415 V 50/60 Hz - 440 V 60 Hz.
The IVE unit control voltage must be same as that of the circuit breaker operating
mechanisms.
b
b
b
v
v
b
v
v
b
v
v
DB101573
IVE unit.
Necessary equipment
For Compact NS100 to 630, each circuit breaker must be equipped with:
a motor mechanism
an OF contact
an SDE contact.
The components are supplied ready for assembly and the circuit breakers prewired.
The prewiring must not be modied.
For Compact NS630b to 1600, each circuit breaker must be equipped with:
a motor mechanism
an available OF contact
a CE connected-position contact (carriage switch) on withdrawable circuit
breakers
an SDE contact.
For Masterpact NT and NW, each circuit breaker must be equipped with:
a remote-operation system made up of:
MCH gear motor
MX or MN opening release
XF closing release
PF “ready to close” contact
an available OF contact
one to three CE connected-position contacts (carriage switches) on drawout circuit
breakers (depending on the installation).
b
b
b
b
b
b
b
b
v
v
v
v
b
b
Remote-operated
source-changeover systems
Electrical interlocking
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