What is the operating time of the GVR magnetic actuator?
A.The GVR operating times are typically 20mS for a trip and 80mS on the close. This allows fault clearing times as fast as 70mS and dead times as low as 250mS for each trip / close cycle in the sequence. The times will vary slightly between ratings and the type of power supply utilised. The worse case times are 25mS for a trip and 110mS for a close, these are the times taken from operation of the contactors controlling the actuator, to the primary contacts separating / touching. For fault clearance times, it is necessary to take into account worse case arcing of 15mS plus the operating time of the relay. Both the Polarr and Panacea have been configured to allow fastest fault clearing times of 70mS. The GVR has been optimised for recloser operation but a faster version is utilised on the high speed transfer switch manufacturer by Powell Esco for underground vault operations. For more information on this application please contact your local FKI Switchgear representative.
