DC high voltage generator

NegotiableUpdate on 05/06

Model

Nature of the Manufacturer: Producers

Product Category

Place of Origin

Online Consult

Overview

The ZGF series DC high-voltage generator adopts a high-frequency voltage doubling circuit, applies * PWM high-frequency pulse width modulation technology, closed-loop adjustment, and adopts voltage feedback to greatly improve voltage stability. Use high-performance high-power IGBT devices and driving technology, and adopt special shielding, isolation, and grounding measures based on electromagnetic compatibility theory. It achieves high quality, portability, and can withstand rated voltage discharge without damage. It has the characteristics of high output power and small size, reliable overvoltage, overcurrent, and zero position closing protection functions, and has a 0.75 times voltage switching function. Mainly applicable

Product Details

Scope of application

1DC high voltage generatorConductivity current test of valve type lightning arrester.
2DC high voltage generatorDC withstand voltage test and leakage current measurement of power transformers.
3. DC withstand voltage test and leakage current measurement of high-voltage cables (35-500kV and below).
4. U1mA DC reference voltage test and 0.75U1mA leakage current test for zinc oxide lightning arrester.

Product parameters

technical parameters

Specifications	200/2	200/3	200/5	300/2	300/3	300/5
Rated voltage (kV)	200	200	200	300	300	300
Rated current (mA)	2	3	5	2	3	5
Rated power (W)	400	600	1000	600	900	1500
Control box mass (kg)	5.5	6.0	6.5	6.5	6.5	7.5
Mass of pressure doubling cylinder (kg)	10.3	10.3	10.3	11.5	11.5	11.5
Height of pressure doubling cylinder (mm)	970	970	970	1250	1250	1250
voltage accuracy	± (1.0% reading+2 words)
Current accuracy	± (1.0% reading+2 words)
ripple factor	≤0.5%
voltage stability	≤ 1% when the power supply voltage changes by ± 10%
overload capacity	The no-load voltage can exceed the rated voltage by 10% and be used for 10 minutes
	The maximum charging current is 1.25 times the rated current
power supply	Single phase AC 50Hz 220V ± 10%
working method	Intermittent use: rated load for 30 minutes
	1.1 times rated voltage usage: 10 minutes
working environment	Temperature: -10 ℃ to+40 ℃
	Relative humidity: not exceeding 85% at room temperature of 25 ℃ (no condensation)
	Altitude: below 1500 meters
Capacity with capacitive load	The capacitance of the test sample is unlimited
	Can be charged with 1.5 times the rated current
structural characteristics	Electrical insulation voltage doubling cylinder
	Air insulation, no leakage concerns
Characteristics of the operation box	High precision 0.75UDC1mA single touch button (accuracy ≤ 1.0%), suitable for testing zinc oxide lightning arresters
	Overvoltage protection adopts digital dip switch, which is clear at a glance
	Portable chassis, more convenient on-site

Selection reference

Selection Reference - Zinc Oxide Surge Arrester DC Reference Voltage and Leakage Current Test

Rated voltage of lightning arrester (kV)	10	35	66	110	220
DC reference voltage kV	28	90	135	168	314
Equipment selection kV/mA	ZGF - 60 / 2	ZGF - 120 / 2	ZGF - 200 / 2	ZGF - 200 / 2	ZGF - 400 / 3

Selection reference - choose according to the voltage level of the substation

Substation voltage level kV	10	35	66	110	220	330
Maximum test voltage kV	47	105	135	192	305	Greater than 400
Equipment selection kV/mA	ZGF - 60 / 2	ZGF - 120 / 2	ZGF - 200 / 2	ZGF - 200 / 2	ZGF - 400 / 3	ZGF - 800 / 10

Selection reference - choose based on the qualification level of repair and testing

Maintenance and testing level	Level 5	Level 4	Level 3	Level 2	Level 1
Maximum test voltage kV	28	90	168	305	Greater than 400
Equipment selection kV/mA	ZGF - 60 / 2	ZGF - 120 / 2	ZGF - 200 / 2	ZGF - 400 / 3	ZGF - 800 / 10

Selection reference - DC withstand voltage and leakage current test of paper insulated cable

Rated voltage of cable Uo/U kV	3.6 / 6	6 / 6	6 / 10	8.7 / 10	21 / 35	26 / 35
DC test voltage kV	17	30	40	47	105	130
Equipment selection kV/mA	ZGF - 60 / 2	ZGF - 60 / 2	ZGF - 60 / 2	ZGF - 60 / 2	ZGF - 120 / 3	ZGF - 200 / 5

Selection reference - Rubber insulated cable DC withstand voltage and leakage current test

Rated voltage of cable Uo/U kV	6 / 10	8.7 / 10	21 / 35	26 / 35	48 / 66	64 / 110	127 / 220
DC test voltage kV	26	37	63	78	144	192	305
Equipment selection kV/mA	ZGF - 60 / 2	ZGF - 60 / 2	ZGF - 120 / 5	ZGF - 120 / 5	ZGF - 200 / 5	ZGF - 200 / 10	ZGF - 400 / 5

Selection reference - DC withstand voltage and leakage current test for main insulation of self accommodating oil filled cable

Rated voltage of cable Uo/U kV	48 / 66	64 / 110	127 / 220	190 / 330	290 / 500
DC test voltage kV	175	275	475	585	775
Equipment selection kV/mA	ZGF - 200 / 3	ZGF - 300 / 3	ZGF - 500 / 5	ZGF - 600 / 5	ZGF - 800 / 10

Product features

1. DC high voltage generator has low ripple coefficient, stable and reliable voltage output, no noise, and good reliability
2. Equipped with overvoltage, overcurrent, zero voltage starting and fault protection functions, the voltage protection value can be set and displayed intuitively
3. Voltage and current are displayed digitally, and there are readings when the power is turned on, making it easy to monitor the output status
4. Equipped with 0.75 times voltage conversion, convenient for testing zinc oxide lightning arresters
5. The product has a compact structure, small size, and is easy to carry