Description

ZGF Series DC High Voltage Generator(DC Hipot tester)
 
General
 
ZGF is the special equipment of DC voltage withstand test and leakage current test for the light arrestor,cable and HV equipment for the power department and industry or mine customers.The device is the updated replacement for which is developed based on PRC Energy Department's Standard and complied with the requirement of No-Gap Oxygen-Zn Light Arrestor(GB *******9).
 
The ZGF adopts new technology,new material and new parts with the features like:big power capacity,small volume,light weight and the protection functions like reliable over-voltage,over-current and *-voltage position switch-off.It has 0.*5 times voltage storage and time relay and can set timing sound alarm in the testing.The whole instrument is portable ,easy operation,safe and reliable which is quite suitable for the site test of power department.
 
Technical data
 
Power supply:  AC**0V(1±*0%)   *0Hz(1±*0%)
 
Indication accuracy of output voltage:        < 1 class
 
Indication accuracy of output current:        < 1 class
 
Wave coefficient:   ≤0.5%
 
Indication accuracy for 0.*5 times output voltage:  < 1 class with lock storage
 
Comparative humidity:      no more than *5% when *5°c,no dew
 
Operation method:   interval application *0 minutes
 
Temperature:  **0°c~*0°c
 
Altitude:  under ***0m
 
Features
 
Light and portable for site application
The instrument is samll volume and light weight and portable. 
 
Seal-type,good mechanical strength and humidity-proof,anti-dust.
The high voltage circuit,current-limit resistor and measuring resistor are all sealed in one metal shelter without the influence of environment humidity and dust.It can work in humid,tough wind and *0°c~*0°c environment stable function and high mechanical strength.
 
High accuracy
Has two functions to measure the leakage current (load current) at high voltage end and low voltage end.Measuring leakage current at high voltage end adopts ball-type shielding digital display,no shift change with accuracy 1μA or 0.1μA clear indication,high accuracy and no worry of discharge impulse.The leakage current of instrument is less than 1μA
Two levels for high voltage and measurement: with high stability high accuracy resistor the control box has HV output voltage and current plug which can connect with high accuracy meter to measure or calibrate.
 
Auto-protection and safe,convenient operation
With adjustable valve value for over-voltage,over-current protection and *-voltage position and earthing protection.The voltage adjustment button can't start if not at  *-voltage position and if earth -wire not well connected and no misaction.
The high voltage generator is seal earthed with no high voltage tap disclosed easy operation and strong anti-interference.
 
High reliability
Power frequency **0V is applied to transformer after self-coupling voltage adjustment,then output high voltage when rectified.Seldom malfunction happens due to the simple circuit.The high voltage generator has good sealing and high reliability.