We have two types of the high-voltage output circuits for our AC withstanding voltage testers: a variable-voltage transformer circuit and a PWM switching amplifying (PWM-based amplifier) circuit.
Variable-Voltage Transformer Circuit:
The circuit uses the variable transformer for high-voltage outputs. The input voltage range is: 100 V +/- 10%.
Main models:
860(A), 871, 865(A) (AZ) (Z), 866(A) (AZ) (Z), 863(A), TOS8850(A), TOS8750, TOS8650, TOS8651, TOS8630, TOS8610, TOS8830, TOS8030, TOS8040, TOS5000 series
Note: If you want to avoid input fluctuations or change an input frequency, place an AC power supply device (e.g., PCR series) to the input terminal of an AC withstanding voltage testers. However, above testers use a typical commercial transformer, so please set the input frequency at 50 or 60 Hz.
PWM Switching Amplifying (PWM-based amplifier) Circuit:
The circuit uses the PWM switching power supply for high-voltage outputs. The switching power supplies feature a universal AC input, so the products with this system can be used anywhere in the world.
Main models:
TOS9300 series, TOS9200 series, TOS9000, TOS5300 series, TOS5200, TOS5052
Note: The variable-voltage transformer system used to be a major system for our electrical safety testers, however it is now shifted to the switching system, which is more efficient and higher reliable. The switching system is considered more suitable to make expansion to overseas plants or build automated testing systems.
