... Digital Very-low-Frequency High Voltage Tester 1,Small volume, light weight, easily to operate. 2,Unlike DC test, 0.1HZ Digital Very ... -low-Frequency High Voltage TesterThe new generation of AC withstand tester, replacing harmonic withstand tester, is widely used in AC withstand test ... ×24×3925+4512A 0.1HZ Digital Very-low-Frequency High Voltage Tester