The HVW40D is a DC winding resistance of a transformer for transformer testing, installation, commissioning testing and electric power department’s preventive testing of semi-finished products and finished products in transformer manufacturing.

It can be used to effectively detect the selection of transformer coils, welding, loose connection parts, missing strands, broken wires, etc.

The instrument uses a new power supply technology and has features such as small size, light weight, high output current, etc. It is a test instrument optimized for measuring the three-phase winding DC resistances of large-capacity transformers.

The instrument can be used to measure the three-phase winding DC resistances of a transformer at the same time. For an on-load tap changing transformer, there is no need for discharging and tapping is directly adjusted with the instrument; the measuring time is 1/3 of traditional single-phase measuring time, which can greatly shorten testing time.

The whole instrument is controlled by SCM and automatically achieves functions such as self-check, data processing, display, etc.

The unit has functions such as automatic discharging, audible alarming of discharging, etc. The unit has advantages such as stable test data, high accuracy, quick speed and good repeatability, and is the best choice for measuring the DC resistance of transformer on site.