... transformer Very Low Frequency Tester for High Voltage Cable 80KVProduct DescriptionAC testing of cables and ... additional protective resistor connected outside.Technical parameters:1. Output voltage ratings: 30KV, 40KV, 50KV, 60KV, 70KV, ... or 60 Hz. The output test voltage is AC voltage but only at a lower frequency ... test at site cable etc with AC voltage using a small, lightweight, economical unit.600 ...