Sudden oil pressure relay

Protective relay (relay) for detecting internal faults in transformers.

This relay is attached with the top or side of an oil-immersed transformer,and at the designed to detect an abnormal pressure rise in the tank close the contacts when an accident inside the transformer.

Type： SSPO-2LLB／SSPO-3C

Catalogue (PDF)

Type	SSPO-2LLB	SSPO-3C
Minimum operating pressure difference	25kPa±15%	31kPa±15%
Minimum rate of operating pressure rise	2.0kPa/s±25%	2.9kPa/s±25%
Kinds of contact	Normally-open contact
Insulation resistance	More than 100MΩ by 500V megger
Withstand Voltage	Between electric circuit and the case, AC2000V
Ambient Temperature	-30～80℃