Page 54 - 1SBC104119C0202_MainCatalog_R contactors

N.O. / N.C. main poles combination
NOR contactors

5 5 7 Description
NOR contactors are built with a combination of N.O. and N.C. poles:
R1 R3 –– AC switching: NOR..MT up to 690 V AC
–– DC switching: NOR..CC up to 1500 V DC in standard.
R2 R4 6 8 R0114D For low current breaking, permanent magnet must be added.
1 N.O and 1 N.C. auxiliary contacts are fitted as standard. For additional
2 N.C. poles + 2 N.O. poles auxiliary contacts refer to "Auxiliary contact fitting details".

Supply Example of use :
Change-over contactor with 2 N.C. poles + 2 N.O. poles.
A1 R1 R3 5 7
Block diagrams
A2 R2 R4 68 R0115DG These contactors are suitable for controlling 2 separate circuits, i.e.
Load Load 2 loads with 2 separate supplies, or 1 circuit including 2 separate loads
with a single supply (diagrams on left column).
Single supply and 2 separate loads When the contactor operates there is no mechanical overlapping between
the N.O. poles and the N.C. poles: BREAK before MAKE operation.
Back-up Main
supply supply These contactors are not suitable for a reversing starter or star-delta

A1 R1 R3 5 7 ! starter, or for controlling a single load from 2 separate supplies.

Operation
The N.O. and N.C. poles are set-up without any mechanical overlap:
–– as the electro-magnet closes, the N.C. pole(s) BREAK before the N.O.

pole(s) MAKE
–– as the electro-magnet opens, the N.O. pole(s) BREAK before the N.C.

pole(s) MAKE.

The breaking and making capacities of the N.C. poles are identical to
those of the N.O. poles.

Other variants
Please consult us for :
–– NOR..AMA and NOR..AME with latching
–– JOR types: version with overlapping between N.O. and N.C. main poles.

A2 R2 R4 68 R0116DG
Load Load

2 separate supplies and 2 separate loads

1SBC104082S0201 - Rev. A

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