Electrical isolation test is performed to prevent electric shock and leakage accidents during product use, and to confirm product safety. It is also used to check the function and performance of insulators. For example, CV cables that transport high voltage from generators, wire harnesses and signal cables that transport electrical signals are covered with insulating materials such as plastic and film.

There are two types of insulation tests: insulation resistance tests and voltage resistance tests (dielectric breakdown tests). The insulation resistance test is a test to check if the insulation is properly maintained. The insulation resistance is calculated by applying a certain voltage to the insulated area and measuring the leakage current. A voltage resistance test is a test to check if insulation is not destroyed by applying a high voltage. For each electrical product, the details of the insulation resistance test and the resistance value to be guaranteed are listed.

In order to perform the insulation test, a transformer must be used to create a high voltage. Matsusada Precision has a range of power supply equipment that can be used for insulation resistance testing.

Dielectric breakdown test circuit

Dielectric breakdown test circuit
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Recommended products

Power supply equipment for insulation testing is available.

AU series

AU series

output voltage
0 to +120kV/-120kV
output current
0 to 2.2A
output power
0 to 2.2kW
Low profile and lightweight

Digital interface is available.Wide lineup of over 300 models, Various remote control and monitor functions

AUH series

AUH series

output voltage
0 to 200kV
output power
0 to 2kW
output current
0 to 13.3mA
Ultra high voltage, High power

High power of 2 kW, Safety design, Ultra high voltage of maximum 200 kV in the 19-inch rack size

EPR series

EPR series

output voltage
0 to 30kV
output current
0 to 150mA
output power
0 to 150W
High Power 150W with 84mm wide

Small and lightweight design with universal input for use anywhere

SK series

SK series

output voltage
0 to 10 kV
output current
0 to 20 mA
output power
0 to 200 W
High voltage/High speed pulse power supply

Ultra compact and light weight design, High power design applicable in low impedance

SKS series

SKS series

output voltage
0 to 10kV
output current:
0 to 10mA avg.
High-Speed High-Voltage Pulse Power Supply

High-speed operation with 50 kHz repetition frequency

AMPS series

AMPS series

output voltage
0 to ±30kV
output current
0 to ±2A
output power
0 to 1.2kW
Ultra high speed/High voltage

Ultra high slew rate 1200 V/µs, High-speed response of frequency bandwidth 100 kHz

AMP series

AMP series

output voltage
0 to ±40 kV
output current
0 to ±2A
output power
0 to 1.2kW
Fast response of slew rate 700 V/µ s

Slew rate with actual load is as high as 700 V/µs.

AMS/AMT series

AMS/AMT series

output voltage
0 to ±20kV
output current
0 to ±200W
output power
0 to 100mA
Fast response of slew rate 360V/µs

High speed response 360 V/µs, DC bias function, Various types of output wave forms according to the input wave

AMJ series

AMJ series

output voltage
0 to ±4kV
output current
0 to ±80mA
output power
0 to 40W
Ultra Compact and Fast Response

High speed response 75kHz, DC bias function

REK/REKJ series

REK/REKJ series

output votage
0 to 1500V
output current
0 to 1200A
output power
0 to 15kW
Versatile, High-performance

Compact and High power, PFC circuit and universal input, Various operations is available

TB series

TB series

output voltage
0 to 1000V
output current
0 to 108A
output power
0 to 1080W
Wide range output/Turbo power supply

"Turbo function" installed, Compact size, Suppressing voltage/current overshoot

R4K-80 series

R4K-80 series

output voltage
0 to 320V
output current
0 to 10A
output power
0 to 80W
Ultra slim design and High power 80W

Various lineups for output current control at 0.1mA increment

R4G/R4GN series

R4G/R4GN series

output voltage
0 to 650V
output current
0 to 10A
output power
0 to 180W
Compact and High resolution

High resolution and Ultra low noise, Digital communication function

AC + DC

DRS series

DRS series

output power
0 to 2000VA
output voltage
0 to 310V
output frequency
1 to 550Hz
Programmable AC Power Source

Simple operations and high power in overwhelming compact size