According to ГОСТ 11677 (Interstate Standard 11677),
IEC – 76 standards

Single-phase transformers ОМП type are intended for feeding cathode protection devices.

They are manufactured for voltage of 6 and 10 kV and power of 1.25, 2.5, 4, 6 and 10 kVA. They also can be used for feeding other single-phase consumers.

The УХЛ climatic modification is of installation category 1 and 2; the ambient medium is inexplosive and it must not contain dust of high concentration that can reduce the item parameters. Voltage is regulated on HV side by ±5 % or on LV side by ±2 х 2.5 % steps of rated voltage while the windings are switched off the network (without excitation switching).

The transformers are equipped with oil level indicators for oil level monitoring.

On LV side a film cutout with 701–1000 V breakdown voltage is mounted.

Single-phase transformers ОМП type.
	Transformers general view, overall dimensions and weight
	Transformers specification
Single-phase transformers ОМП type with voltage regulation on lv side.
	Transformers specification
Single-phase transformers ОМП-10, ОМП-6 with voltage regulation on lv side.
	Overall, mounting, conjunction dimensions and weight
Single-phase transformers ОМП – 1,25, ОМП – 2,5, ОМП – 4,0 with voltage regulation on lv side.
	Overall, mounting, conjunction dimensions and weight