BS EN 61166 applies only to ground mounted high-voltage (HV) circuit-breakers, the supporting structures of which are rigidly connected with the ground, and does not cover the seismic qualification of circuit-breakers in metal enclosed switchgear.
BS EN 61166 is a guide providing procedures to seismically qualify HV alternating-current ground mounted circuit-breakers.
BS EN 61166 on high-voltage alternating current circuit-breakers is helpful for:
Having access to reliable guidelines is essential to prepare and use quality high-voltage alternating current circuit-breakers. BS EN 61166 provides manufacturers with the general requirements, test procedures and measurements which allows them to manufacture and test high-voltage alternating current circuit-breakers effectively.
IEC 61166:1993