Thiết bị phân tích OLTC máy cắt SKB EP PKR-2M
Resistor type OLTC contactor switchover oscillography The switchover oscillography enables to detect the actuation delay, non-simultaneity of in phase actuation and bouncing during switchover. All characteristics are taken simultaneously based on three phases for OLTCs located in the neutral conductor of "star-connected" windings, and single phase for OLTCs located in the line of "star-" or "delta-connected windings". A standard oscillogram of the LTC resistor An oscillogram of the LTC resistor recorded by the PKR-2 instrument OLTC check in static mode Check conducted during the drive shaft slow rotation using a handle with simultaneous display of contact closures/openings in degrees and voltage and current values. Automatic self-adjustment to OLTC No additional elements (for example, resistors) or knowledge of resistances of current-limiting resistors of the checked instrument are required to measure the OLTC parameters. All adjustments to a specific OLTC are performed automatically in the instrument. Ergonomic calipers or alligator clip cable The instrument is completed with special long calipers to be conveniently connected to some OLTCs (in this case, it is not necessary to drain oil from the contactor tank). The instrument may be connected to the on-load tap changer with measuring cables provided with alligator clips without contact calipers with oil being partially drained from the contactor tank or removal of the on-load tap changer from the transformer tank.