An overview,

Dc resistance of transformer is a required item of semi-finished product in transformer manufacturing, factory test of finished product, installation, overhaul, after changing tap switch, handover test and preventive test of electric power department. It can check the welding quality of the winding joint and whether the winding has inter-turn short circuit. It can detect whether the contact of each position of the electric voltage tap switch is good and whether the actual position of tap switch is consistent with the indicated position, whether the lead wire is broken, and whether the multi-strand wire is broken and wound. In order to meet the need of transformer DC resistance rapid measurement, our company developed zY-50A DC resistance tester. The instrument adopts new power supply technology, with small volume, light weight, large output current, good repeatability, strong anti-interference ability, perfect protection function and so on. The whole machine is controlled by high speed single chip microcomputer, high degree of automation, with automatic discharge and discharge alarm function. The instrument has high precision and easy operation, and can realize the rapid measurement of transformer direct resistance.

Two, technical indicators

Output current: 5A, 10A, 20A, 50A

Range: 40μ ω ~ 500m ω (50A)

100μ ω ~ 1 ω (20A)

500μ ω ~ 2 ω (10A)

1M Ohm to 4 Ohm (5A)

Accuracy: 0.2%

Resolution: 0.1μ ω

Operating temperature: 0 ~ 40℃

Ambient humidity: ≤90%RH, no condensation

Power supply: AC220V±10%, 50HZ±1HZ

Net weight: 12 kg

Dimensions: 440*240*390