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TechnologyUpdateImage_10 Siemens has launched a new range of Residual Current Circuit Breakers – ‘5SM3’. The 5SM3 RCCBs product range surpasses the industry standards set by International Electro-technical Commission (IEC).

This range has also been certified by the Bureau of Indian Standards (BIS) under IS 12640 Part 1: 2008.

Type AC: Residual current protective devices of type AC are suitable only for detecting sinusoidal AC residual current.

Type A: In addition to sinusoidal AC residual currents, residual current protective devices of type A also measure pulsating DC residual currents.

Type B: In addition to detecting residual current waveforms of type A, residual current protective devices of type B are used to measure smooth DC residual currents.

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