Contact Resistance Tester

Description

Detailed Product Description

Circuit Breaker Contact Resistance Tester , Switch Loop Resistor Tester, 200A Test Current, Micro Ohm Meter

I. Products Description and Why need to use the tester

Conductivity performance of the conductive circuit of the breaker (hereinafter abbreviated as switch) plays important function on safe operation of the switch. Conductivity performance can be reflected by resistance of the conductive circuit. Therefore it is specified in IEC standards and by the manufacturer that resistance of the measurement circuit shall be measured, and clear indexes are specified for circuit resistance of the switch in different type. The double arm electric bridge is generally applied in past time. Because voltage and current of the electric bridge are very small, distribution of testing data is great when there is impurity between movable contact and static contact of the switch or there is surface oxidation etc. And anti-interference performance of the electric bridge is bad at same time. And it is specified in GB50150-91 and DL/T 596-1996 that “DC pressure method shall be applied” and “current isn’t lower than 100 A”. This instrument is extensively used to measure contact resistance, circuit resistance of various electrical apparatus and switches and contact resistance of cable and wire, welding seam, which is manufactured by Hongte company in order to suit to requirements of specification. so the HTHL-200A contact resistance tester is used for the above measurement purpose.

II. Features

· Testing current is great, which is completely in accordance with relevant national standard requirement on testing of contact resistance.

· Output voltage is high, measurement scope is wide, which can reach 100mΩ.

· Testing current comes from the 200A switching type constant current power supply with high accuracy, it is not necessary to carry out artificial adjustment, testing is quick and accurate.

· Four terminal wiring method is applied, which effectively excludes influence of testing wire resistance on testing result.

· Testing speed is quick, data are displayed within about 3 seconds.

· It can work continuously for long term, it is equipped with the overheat protection circuit, the instrument is reliable and stable.

· Operation is simple, weight is light, which is applicable to field operation.

III. Technical Parameters

1. Testing current: 50A, 100A and 200A(100A type, no 200A shift)

2. Measuring scope: 50A shift 0～100 mΩ

100A shift 0～50 mΩ

200A shift 0～20 mΩ

3. Minimum resolution: 0.01μΩ

4. Accuracy: 0.5%±0.2µΩ

5. Output voltage: DC 10V