Protection devices for transformers - Import export

The hermetic Transformer Protection Relay MCHD for hermetically sealed, liquid immersed distribution transformers without gaseous cushion in accordance with EN 50216-3. Each Hermetic-protection relay MCHD is individually tested for tightness and proper functioning.

NSPV surge protective device AC Surge protection device(SPD) is an indispensable device for lightning protection of electronic equipment. It is used to limit the instantaneous overvoltage of the power line and signal transmission line to the voltage range that the equipment or system can withstand, or A powerful lightning current drains into the ground to protect the protected equipment or system from impact and damage.

Pressure relief devices for liquid-immersed transformers open in case of an internal fault and guarantee that the occured overpressure can properly release. Pressure relief devices close with decreasing pressure back to completely closed and leaktight position. Pressure relief devices for transformers can be installed in any position or inclination on the cover or the wall of a transformer. Upon request a transformer can be equipped with several pressure relief valves.

The oil drain device Type C2 is used for oil sampling or emptying the transformer tank. The device is welded into the transformer case. The device is designed for use together with connection pipe F DIN 42551 for draining the transformer case for regeneration purpose of the oil. The oil drain device Type C2 is deisgned in accordance with EN 50216-4:2002 type C2.