Explosion-proof complete transformer substation, type КТПВ

Explosion-proof complete transformer substations КТПВ, with rated power from 100 to 630 kVA, are designed to supply three-phase AC power to electrical equipment installed in underground workings hazardous due to gas and dust, as well as to provide leakage-current protection and maximum current protection of low-voltage lines. The substation is equipped with transformers of the ТСВ type. The power transformer is assembled on a core-type magnetic circuit made of cold-rolled electrical steel with low specific losses. The magnetic core of the power transformer is three-phase, core-type, manufactured using “Step-Lap” technology from cold-rolled grain-oriented electrical steel. The lamination stacking is performed in five sheets. The transformer windings are made of copper wire with heat-resistant insulation. Insulation type — aramid paper “prepreg” or “Nomex”. Winding type — multilayer cylindrical. The ВН winding has tappings that allow adjusting the transformation ratio within ±5%, brought out to an insulation panel. Components and operating principle of the substation: The substation consists of a power transformer compartment, high-voltage switchgear (РУВН), low-voltage switchgear (РУНН), and a wheel assembly (optional). By switching on the РУВН disconnector, the primary voltage is fed to the power transformer compartment. The power transformer converts the voltage of electric energy and transfers it to the РУНН. In the РУНН, the voltage is distributed and supplied to consumers.