GTB Dry Type AC/DC Hipot Test Set
Product Introduction
The series of AC dry-type test transformers produced by our company completely overcomes the shortcomings of old-fashioned and bulky models. This instrument is equipped with a high-voltage silicon stack produced by our company, which can provide a DC high-voltage testing power supply. This instrument is used in conjunction with control cabinets, automatic protection microamperes, ball gaps, etc., and is particularly suitable for on-site testing, making heavy work convenient, fast, simple, flexible, and efficient. Therefore, it has received high praise and appreciation from customers in the power system and large industrial and mining enterprises.
Các thông số kỹ thuật
| impedance voltage | ≤12% |
| output voltage wave form | sinusoid |
| surface temperature rise | ＜55℃ |
| no-load current | ＜4% |
Safety Precautions
Arrangement of test instrument, please keep an enough safe distance. Do not arrange equipment and high voltage test down-leads in the gateway.
Test site should install fences and hang "Stop! High Voltage" labels.
Test high voltage down-lead should be equipped with support or traction insulation. At the other end and Intervals of cable arrange people to guard for keeping people away.
DC high voltage test micro-ammeter, you'd better set it at the highest potential, in addition the screening box and automatic over-current protection devices can prevent sudden short-circuit breakdown or discharge burns meter.
Power frequency withstand voltage test, please check the capacity of instrument to avoid resonance.
Working earth wire (earth wire of high voltage end and stabilized voltage capacitor end) and protective earth wire (the shell of control cabinet) should be firmly grounded respectively.
In test if the power irregularly swings, it must affect the stability of high voltage output. At this time please stop the impact of electric welding or look for other reasons.
Climate (temperature, humidity) in test should comply with the requirements of test procedures. If necessary, shielding measures may be taken.
During test if you found the pointer of voltmeter swings rapidly, the pointer of current meter sharp increases or there is smoke, flash, burnt smell, abnormal noise, etc. please immediately stop test and cut off the power supply,
then check the reason.
High voltage test must strictly enforce the safety regulations issued by the Ministry of Electric Power.
