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A-45
Mechanical interlocking
Amanual source-changeover system can be installed
on two to three manually-operated circuit breakers
or switch-disconnectors. Interlocking is mechanical.
Interlocks prevent connection to both sources at
the same time, even momentarily.
Interlocking of two devices with rotary handles
The rotary handles are padlocked with the devices in the OFF position.
The mechanism inhibits the two devices being closed at the same time, but does
allow for both to be open (OFF) at the same time.
Combinations of Normal and Replacement devices
All Compact NS630b to 1600 circuit breakers and switch-disconnectors with rotary
handles can be interlocked.
Interlocking of a Compact NS630b with a Compact NS630b to 1600 is not possible.
Interlocking of a number of devices using keylocks
(captive keys)
Interlocking uses two identical keylocks with a single key. This solution enables
interlocking between two devices that are physically distant or that have significantly
different characteristics, for example between a low and a medium-voltage device,
or between Compact NS circuit breakers and switch-disconnectors.
A system of wall-mounted units with captive keys makes possible a large number
of combinations between many devices.
Combinations of Normal and Replacement devices
All Compact NS630b to 1600 circuit breakers and switch-disconnectors with rotary
handles or motor mechanisms can be interlocked.
Interlocking of two Compact NS630b to 1600 devices using
connecting rods
The two devices must be mounted one above the other (either 2 fixed or 2
withdrawable/drawout devices).
Installation
This function requires:
an adaptation fixture on the right side of each circuit breaker or switch-disconnector
b
a set of connecting rods with no-slip adjustments.
b
The adaptation fixtures, connecting rods and circuit breakers or switch-
disconnectors are supplied separately, ready for assembly by the customer.
The maximum vertical distance between the fixing planes is 900 mm.
Possible combinations of “Normal” and “Replacement” source circuit
breakers
Combinations are possible between Compact NS630b to NS1600 devices and
between Masterpact NT and Masterpact NW devices.
Interlocking of two Compact NS630b to 1600 devices
using cables
For cable interlocking, the circuit breakers may be mounted one above the other or
side-by-side.
The interlocked devices may be fixed or drawout, three-pole or four-pole, and have
different ratings and sizes.
Installation
This function requires:
an adaptation fixture on the right side of each device
b
a set of cables with no-slip adjustments.
b
The maximum distance between the fixing planes (vertical or horizontal) is 2000 mm.
Possible combinations of “Normal” and “Replacement” source circuit breakers
“Normal N”
“Replacement” R
NS630b to
NS1600
NT06 to NT16 NW08 to
NW40
NW40b to
NW63
NS630b to NS1600
Ratings 250... 1600 A
b
-
-
-
It is not possible to combine Compact NS630b to 1600 and Masterpact (NT or NW)
devices.
DB401829
Interlocking with keylocks.
DB401830
Interlocking of two devices with rotary handles.
DB128465
O
I
O
O
I
O
DB128466
O
I
O
O
I
O
Interlocking with
connecting rods
Interlocking with cables