Hipot or dielectric withstand testing instruments manufactured by Chroma are used for conducting electrical safety tests on electrical components and products to make certain they are in compliance with IEC, UL, TUV, CSA, EN and other electrical safety requirements. In addition, these instruments are designed for general product or component testing as well as complex medical safety testing (60601-1) ensuring human safety and product reliability.

19070 Series Hipot Tester AC/DC/IR

• AC/DC/IR 3 in 1 hipot tester
• AC 5kV and DC 6kV output
• 1kV insulation resistance test
• Insulation resistance measurement from 1M to 50
• Ground continuity check
• Open Short Check(OSC) function
• GFI shutdown the instrument when imbalance current > 0.5mA
• Flashover (ARC) detection
• Quick discharge of DUT in IR and DC test
• Pause mode
• Large LCD display (240 x 64 dots matrix)
• UL and TUV approved (*see spec)
• CE mark
• Programmable ramp/fall and test time
• Programmable high/low limit
• Save/Recall program test function
• Remote control and interface support
• Download Data Sheet

The Chroma Hipot Tester 19070 series provides 3 models for choice. The 19071 is for AC Hipot testing, the 19073 which combines both AC and DC Hipot with insulation resistance (IR) measurements into a single compact unit.

Open Short Check (OSC)

O.S.C function is used to check the connection is open or short circuit between instrument and DUT (equipment under test) before the Electrical Safety Test. If the connection is bad between the instrument and DUT, sometimes like leads or relay oxidation, the judgment is also PASS. In some cases, the DUT is short before testing. Testing continually leads to our instrument broken because suffered the high load current. Therefore, we have to check the open and short circuit to ensure the test effectively and protect instruments.

Generally, the DUT have capacitive load (Cx) from tens to thousands of pF. If the connection opening, a capacitance will appear and then total capacitive load is lower than that in normal condition. If the DUT shorting, total capacitive load is higher than that in normal condition. Therefore, we can measure the value of capactive load to check the contact is good or not.

Ground Fault Interrupt (GFI)

The requirement of test environment indicates that test equipmentis equipped with auto interrupt device so that Chroma develops into Ground Fault Interrupt (GFI) function. When the current meter A1 and A2 detect the difference (i2-i1=iH) between the value i1 and actual i2 test current over high, this device can cut the power transiently for protecting human body safety. It is not only compliance with the safety standard but also more safeguards for test personnel.

Quick Discharge

In DC hipot and IR test the device under test is discharged back through the HV transformer. This technique results in a rapid and safe discharge.

Flashover (ARC) Detection

Fast transient in Voltage or Current occured while Hi-Pot testing is called Electrical Flashover. Normally, in AC line frequency (50Hz/60Hz) or DC Hi-Pot testing, the leakage current is the same as 50Hz/60Hz or DC (charge current is excepted). As shown in Figure leakage current varies smoothly.

On the other hand, electrical discharge occurred because of poor insulation in material, electrode gap or surface clearance etc., fast transient in leakage current apparent as shown in figure. This is phenomenon of poor withstanding. Most of Electrical Safety regulations mention the necessity in Withstand Strength Test. Nevertheless, general Hi-Pot tester detects the RMS value of leakage current only without capability to detect Flashover. Therefore, FLASHOVER detection function equipped with Hi-Pot tester is necessary.

 

Model	Description	Quote	Buy
19071	Hipot Tester (AC)
19073	Hipot Tester (AC/DC/IR)
A190701	Remote Control Box		Call
A190702	40kV Test Probe		Call
A190704	Start Switch
A190706	19' Rack Mount Kit for Model 19070 series
A190708	ARC Verification Fixture		Call
A190344	HV Gun