Page 118 - Sace Emax 2 Catalogue

6/16 SACE EMAX 2 LOW VOLTAGE AIR CIRCUIT-BREAKERS

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Accessories for circuit-breakers

Interlocks and switching devices
Mechanical interlocks
These interlock systems enable various opening
and closing configurations to be obtained be-
tween two or three circuit-breakers. Four types of
interlock configuration are available:
Types of interlock Possible application Logic Circuit-breakers
Type A

Excludes the possibility of having two Main line power supply and emergency Available between
circuit-breakers in the closed position power supply. 1 2 circuit-breakers of
at the same time. O O different sizes and
with any fixed /
I O withdrawable version
O I

Type B

Permits a pair of circuit-breakers to be Two power supplies from transformers 1 2 3 Available between
closed if the third is open. The latter can and one emergency power supply. E2.2, E4.2 and E6.2
only be closed when the pair is open. O O O circuit-breakers
and with any fixed /
I O O withdrawable version
O O I
I O I
O I O

Type C

Permits two out of three circuit-breakers Two half-busbars can be powered by a 1 2 3 Available between
to be closed at the same time. single transformer (bus-tie closed) or by E2.2, E4.2 and E6.2
both at the same time (bus-tie open). O O O circuit-breakers
and with any fixed /
I O O withdrawable version
O I O
O O I
O I I

I I O
I O I

Type D

Permits one out of three interlocked Three power supplies on the same busbar 1 2 3 Available between
circuit-breakers to be closed. that must not operate in parallel. E2.2, E4.2 and E6.2
O O O circuit-breakers
and with any fixed /
I O O withdrawable version
O I O
O O I