AC and DC Hipot Testing for Electrical Safety Evaluation
The KIKUSUI TOS5401 combines AC and DC withstanding voltage testing in a single electrical safety tester for electronic equipment, components, quality assurance, and production test environments.
The instrument provides AC withstand testing up to 5 kV / 100 mA with 500 VA rated output and DC withstand testing up to 6 kV with a maximum rated current of 10 mA. A high-efficiency PWM switching amplifier stabilizes the high-voltage output against AC line-voltage fluctuations.
5 kV / 100 mA AC
500 VA AC withstand capability for electrical safety testing.
6 kV DC
DC withstand testing with up to 10 mA rated current and 50 W maximum rated output.
Discharge Detection
Adjustable LPF and HPF detection helps identify momentary, arc, corona, and high-frequency discharge behavior.
7-inch Touchscreen
Touch-panel operation plus LAN, USB, and RS232C support bench and automated testing.
Programmable voltage rise and fall control, current-based PASS/FAIL judgment, DC forced discharge after testing, automated two-step test programs, and remote communication functions support repeatable R&D, QA, certification, and production-line workflows.
5 kV / 100 mA AC Hipot Testing
Provides an AC test-voltage range of 0.05 kV to 5.00 kV with 500 VA maximum rated output and 100 mA maximum rated current at output voltages of 0.5 kV or higher.
6 kV DC Hipot Testing
Supports DC withstand testing from 0.05 kV to 6.00 kV with 10 mA maximum rated current and 50 W maximum rated output.
Stable PWM High-Voltage Output
A PWM switching amplifier maintains stable output despite changes in the AC input supply. At 5 kV with no load, KIKUSUI specifies ±0.3% output variation for an input range of 90 V to 250 V.
Adjustable Discharge Detection
Separate LPF and HPF discharge detection can be configured to identify normal overcurrent behavior as well as smaller, high-frequency discharges such as arc and corona events.
7-inch Touch Panel
The touchscreen presents test settings, operating information, diagrams, and status information through an interface designed for efficient setup and operation.
Faster Test-Cycle Control
AC start-phase control can begin the waveform approximately 90 degrees from the zero crossing under supported settings, reducing the need for a conventional voltage rise interval in applicable production tests.
Current Measurement and PASS / FAIL Judgment
Built-in voltage and current measurement supports programmable upper and lower current limits, with automatic output shutdown when a fail condition is detected.
LAN / USB / RS232C Automation
Standard LXI-compatible LAN, USB 2.0 with USBTMC support, and RS232C enable integration into automated safety-test systems and production environments.
Electronic equipment AC/DC withstand voltage testing
Electrical and electronic component hipot testing
Product development and R&D electrical safety evaluation
Quality assurance and incoming inspection
Production-line AC/DC hipot inspection
Certification and compliance laboratory testing
Automated electrical safety test systems
TOS5401 Specifications
| Model | TOS5401 |
|---|---|
| Product Type | AC/DC Hipot Tester |
| Test Functions | AC Withstanding Voltage / DC Withstanding Voltage |
| AC Output Range | 0.05 kV to 5.00 kV |
| AC Output Setting Range | 0.000 kV to 5.500 kV* |
| Maximum AC Rated Voltage | 5 kV |
| Maximum AC Rated Current | 100 mA at 0.5 kV or higher |
| Maximum AC Rated Output | 500 VA (5 kV / 100 mA) |
| AC Frequency | 50 Hz / 60 Hz |
| AC Output Method | PWM switching |
| DC Output Range | 0.05 kV to 6.00 kV |
| DC Output Setting Range | 0.000 kV to 6.200 kV |
| Maximum DC Rated Voltage | 6 kV |
| Maximum DC Rated Current | 10 mA |
| Maximum DC Rated Output | 50 W (5 kV / 10 mA) |
| Output Setting Resolution | 1 V |
| AC/DC Output Setting Accuracy | ±(2% of setting + 20 V), no load |
| Voltage Measurement Range | AC/DC: 0.000 kV to 6.500 kV |
| AC Current Measurement Range | 0.00 mA to 110 mA |
| DC Current Measurement Range | 0.00 mA to 11 mA |
| AC Upper Judgment Setting | 0.01 mA to 110.00 mA |
| DC Upper Judgment Setting | 0.01 mA to 11.00 mA |
| Discharge Detection | LPF / HPF selectable with adjustable sensitivity |
| DC Forced Discharge | 125 kΩ discharge resistance; up to 1 µF specified for discharge within 2 s |
| DC Discharge Time Setting | 0.0 s to 100.0 s |
| Auto Test | 61 programs / 2 steps |
| Auto-Test Step Interval | 0.1 s to 100 s |
| Display | 7-inch touch panel |
| Standard Interfaces | LAN / USB / RS232C |
| AC Input | 100 Vac to 240 Vac nominal (90 Vac to 250 Vac allowable) |
| Input Frequency | 47 Hz to 63 Hz |
| Dimensions (W × H × D) | 320 × 132 × 350 mm |
| Weight | Approx. 16 kg (35.27 lb) |
* AC output-setting limitations change when cycle-based test timing and specific phase-shift settings are used. Maximum rated voltage, current, and power values should not be interpreted as simultaneously available outside the operating conditions specified by KIKUSUI.
Discharge Detection and DC Test Safety Control
The TOS5401 provides both discharge-event detection during withstand testing and a forced-discharge function after DC testing. These are separate functions designed for different parts of the test process.
During a withstand test, discharge detection monitors the EUT separately from the normal upper-current judgment. Selectable low-pass and high-pass detection modes allow the instrument to respond to different discharge characteristics.
LPF Detection
Fast, Medium, and Slow response settings support conventional withstand-current monitoring.
HPF Detection
High, Medium, and Low sensitivity settings target small and high-frequency discharge events.
DC Forced Discharge
Discharges stored energy from a capacitive EUT after completion of a DC withstand test.
Start Long
Optional hold-to-start operation helps reduce unintended initiation of a high-voltage test.
For DC withstand testing, the forced-discharge circuit uses a 125 kΩ discharge resistance. KIKUSUI specifies a maximum capacitance of 1 µF for discharge within approximately two seconds; higher capacitance can be tested but requires additional discharge time.
