HVHIPOT GDZRS-40S 20A 3 phase 40A DC Transformer Coil Resistance Tester

• After-sales Service: Yes
• Warranty: 1 year
• Test current: 20A, 10A, 5A, 1A, 200mA, 20mA(single phase) 10A+10
• Data saving capacity: 100 groups
• Size: 428mm*350mm*230mm
• Weight: 10.2kg
• Model NO.: GDZRS-40S
• Transport Package: Plywood Case
• Specification: ISO
• Trademark: HV HIPOT
• Origin: Wuhan, China

Product Description

I. General Information

GDZRS series Winding DC resistance tester is a must-test item for semi-finished products and finished products in the factory test, installation, handover test and preventive test of the power department in the manufacture of transformers.
In order to meet the needs of fast measurement of DC resistance of transformers, our
company has developed a three-channel DC resistance tester that integrates three-identity testing, magnetic aid function, and degaussing function. The instrument realizes the simultaneous power-on of three phases, independent current sampling and voltage sampling, and simultaneously measures and displays the three-phase resistance value and three-phase unbalance rate function, which greatly shortens the test time of transformer DC resistance and solves various problems of power transformers. The problem of time-consuming tap winding DC resistance test.

II. Features
 

1. It can select corresponding output current value according to test products, and is mainly suitable for measuring the inductive DC resistance on transformers.
2. On large transformers with a five-leg core and low-voltage windings connected in delta, the tester can be used for the test in HV & LV series excitation mode. The magnetic augment circuit of the windings can be automatically connected in the tester, to quickly and accurately test the DC resistance of the low-voltage windings.
3. With three phases test function to measure the three-phase DC resistance of the star-connected windings synchronously and calculate the three-phase unbalance rate automatically, so as to greatly reduce the measurement period and improve the test efficiency. Its phase by phase test function can also be used for phase by phase test on transformers with YN and D (Y) connections.
4. Equipped with a 7-inch color touch screen. to display the test data clearly in real-time.
5. Equipped with a RS232 communication port, to transmit the test data to the background, with the control software in the host computer.
6. Built-in calendar and clock, as well as saving( save 100 groups of data), review, and printing functions of test data.
7. The tester has more complete parameter settings, including test windings, tapping positions, test phases, tested sample temperature, conversion temperature and others of the transformers.
8. The tester is equipped with an industrial plastic case which ensures its good portability and improvesits service life.

III. Specifications
 

Current	40A;20A;10A;5A;1A;200mA;20mA (single phase) 20A+20A;10A+10A;5A+5A;1A+1A;200mA+200mA;20mA+20mA (three phases)
Range	Three phase test	20A+20A:0.5mΩ~0.3Ω; 10A+10A:1mΩ~0.6Ω; 5A+5A:2mΩ~1.2Ω; 1A+1A:10mΩ~6Ω; 200mA+200mA:100mΩ~30Ω; 20mA+20mA:10Ω~200Ω;
	Single phase test	40A:0.25mΩ~0.5Ω; 20A:0.5mΩ~1Ω; 10A:1mΩ~2Ω; 5A:2mΩ~4Ω; 1A:10mΩ~20Ω; 200mA:100mΩ~100Ω; 20mA:10Ω~20KΩ;
Accuracy	±(0.2%+2 digits)
Max. resolution	0.1μΩ
Data saving capacity	100 groups
Power supply	AC 220V±22V, 50Hz/60Hz±1Hz
Working conditions	Environmental temperature:-10-40ºC; Relative humidity: ≤80%
Instrument volume	Length 428mm*width 350mm*height 230mm
Instrument net weight	12.8kg