Product introduction:

 

 

 

This instrument is suitable for high-precision measurement of high-voltage switch contact resistance (loop resistance), and also for other occasions that require large current and small resistance measurement.

 

In the past, the conventional QJ44 double-arm dc bridge was widely used in the power system to measure the dc resistance of the transformer coil and the contact resistance of the high-voltage circuit breaker, but the test current of this kind of bridge was only mA level, so it was difficult to find the defect of the reduction of the conductor area of the transformer coil conductive circuit. When measuring the contact resistance of the conductive circuit of the high voltage switch, due to the influence of the oxide layer between the oil film and the stationary and static contacts, the measurement deviation is large, which covers the real contact resistance value. Therefore, the standard sd301-88 "ac 500KV electrical equipment handover and preventive test code" and the new version of "electrical equipment preventive test code" on the breaker, the isolation switch contact resistance of the measurement of current is not less than 100A dc provisions, to ensure accuracy.

 

The circuit resistance tester is controlled by microcontroller and displayed on the interface of humanized Chinese characters. Its test current is 100A/200A dc recommended by the national standard GB763. The circuit resistance or contact resistance can be directly measured under the condition of 100A/200A current. The liquid crystal display is used to test the current value and test the resistance value. You can print it out. The instrument is accurate, stable and easy to operate. It is suitable for field maintenance of high voltage switches in power and power supply departments and circuit resistance testing in high voltage switching plants.

 

 

 

Technical parameters:

 

 

 

Technical performance and characteristics

 

1, measuring range: 1-20000 (including Ω resolution: 1 (including Ω

 

2. Measuring current: dc 100A/200A (convertible)

 

3. Measurement accuracy: 0.5% 5 words

 

4. Display mode: LCD with large screen

 

5. Power supply: AC220V 50Hz

 

6. Maximum output voltage: DC 10V

 

7. Standard output current: DC 100A/200A is convertible

 

8, with printer

 

9, the machine voltage current line regardless of direction, arbitrary wiring