Technical information

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1SDC210033D0202

The ﬁ xed version of the RC Sel residual current release can easily be converted:

into the plug-in type:

– by ordering the kit for converting the residual current release from the ﬁ xed to the plug-in version;

into the withdrawable type:

– by ordering the kit for converting the residual current release from the plug-in to the withdraw-

able version. This kit contains the shunt opening release of the withdrawable residual cur-

rent device to replace the shunt opening release supplied with the fixed version. The shunt

opening release of the withdrawable residual current device contains both the connector for

the moving part and the connector for the fixed part. The 160A frame with residual current

withdrawable breaker can be used up to a maximum current of 135A, whereas the 250A

frame can be used up to 210A.

With the RC Sel residual current release for XT2-XT4, it is possible to use the same terminals us-

able for the ﬁ xed circuit-breaker and for the ﬁ xed parts of plug-in and withdrawable circuit-breakers.

RC B Type residual current release (type B) for XT3

The RC B Type residual current release, to be used in conjunction with the XT3 circuit-breaker, has

the following features:

it complies with type B operation, which guarantees sensitivity to residual fault currents with

alternating, pulsating alternating and direct current components (IEC 60947-1, IEC 60947-2

Annex B, IEC 60755);

the maximum frequency band of the residual fault current can be selected (3 steps: 400 -

700 - 1000Hz). The residual current device can therefore be adapted to suit various industrial

installation requirements according to the prospective fault frequencies generated on the load

side of the release. Typical installations that may require different frequency thresholds from the

standard ones (50 - 60Hz) are welding systems for the automobile industry (1000Hz), the textile

industry (700Hz), airports and three-phase drives (400Hz).

Setting non-tripping times

Test pushbutton

LED signalling alarm

and pre-alarm

Power-on LED

Magnetic indicator of

residual current device trip

Current setting

Setting fault frequencies