... low-Frequency High Voltage TesterThe new generation of AC withstand tester, replacing harmonic withstand tester, is widely used in AC withstand test of ... .3. Auto-protection of over-current and over-voltage, the research,design and manufacture of independent intellectual ... ) strengthen the load-bearing capability.Technical parameters:1. Output voltage ratings: 30KV, 40KV,50KV,60KV,70KV, 80kV,90KV2. ...