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Entry type: FAQ, Entry ID: 21656730, Entry date: 11/18/2014

Switching of voltages higher Ue 1000V AC and 1500V DC

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What products of the SIRIUS Low-Voltage Switchgear range can be used in circuits with Ue >1000V AC und >1500V DC?




60947-1 standards for Low-Voltage Switchgear specify test conditions for rated insulation voltages Ui of max. 1000V AC and 1500V DC.
Even though the actual test voltages for the determination of the Ui are partially higher than 1500 V, an operation of Low-Voltage Switchgear in circuits with Ue >1000V AC and >1500V DC is not permissible. This also applies if the load current is a few milliampere only and if the switching is done under no-load condition.

As a solution we recommend the use of 'medium voltage relays' that are offered by SIEMENS. 
For inquiries on those issues, please refer to:
Tel: +49 (180) 524-7000
Fax: +49 (180) 524-2471




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