Atec 19050, 19070 User Manual

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AC/DC/IR HIPOT TESTER

MODEL 19070 & 19050 SERIES

Complete Dielectric Testing Solution

The 19050 seri es elect rical safety tester s are

adv ance d digi tal hip ots wi th load an d lin e

regulation to ensure the measurement integrity.

Mult i-s te p cap ab ility allows users to per form

multipl e test s in a sequence such as AC hipot

followed by IR.

The Chroma Hipot Tester 19050 series provides

3 models for choice. The 19052 is for AC/DC/IR

Hip ot te stin g and in sula tion resi stan ce (I R)

measurements. The 19053 IR measurement is with

8 scan channels, and the 19054 IR measurement

is with 4 scan channels capability into a single

compact unit.

The Chroma Hipot Tester 19070 series provides

2 models for choice. The 19071 is for AC Hipot

testing. The 19073 com bi ne s bot h AC and DC

Hipot with insulation resistance (IR) measurements

into a single compact unit.

Open Short Check (OSC)

The OSC function is used to check whether the

connection is open circuit between instrument

and DUT or breakdown inside DUT before testing

the electrical safety.

Flashover (ARC) Detection

The 19070 series is sensitive enough to monitor

current spikes even if they do not exceed the

maximum trip current level.

Ground Continuity Check

All of the 19050 seri es testers ha ve a gro un d

con ti nui ty ch eck fea tu re to de te rmine th e

resistance, th at is between the ground blade

of power cord and any exposed metal on the product, is less than 1Ω.

Ground Fault Interrupt (GFI)

GFI is required by the National Elec trical Code

in wet locat ions. Such d evices automati cally

interrupt power when a ground current > 0.5mA

ex is ted fo r more th an a few mi ll i-se conds to

protect users.

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.

AC/DC/IR Hipot Tester

MODEL 19070 SERIES 19050 SERIES

Basic Specifications:

■ AC/DC/IR 3 in 1 hipot tester

■ AC 5kV and DC 6kV output

■ 1kV insulation resistance test

■ Insulation resistance measurement from

1MΩ to 50GΩ

■ Ground continuity check

■ Standard RS-232 interface

Key Features:

■ 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

Others:

■ 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

TECHNICAL NOTE

FLASHOVER 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 gure. 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.

Gap Discharge Voltage

Test Voltage Waveform

180 360

Leakage Current (normal capacitive)

-10

Figure 1 : Normal Leakage Current Waveform

Test Voltage Waveform

Gap Discharge Voltage

180 360

Leakage Current (abnornmal with ashover)

-10

Figure 2 : Leakage Current Waveform when ahover occurred

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 suered the high load current. Therefore, we have to check the open and

short circuit to ensure the test eectively 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.

µA

Normal Condition

Ground Fault Interrupt (GFI)

The requirement of test environment indicates that test equipment

is equipped with auto interrupt device so that Chroma develops into

Ground Fault Inter rupt (GFI) function. When the current meter A

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.

µA

If Circuit Opened :

C = Cc*Cx/(Cc+Cx) << C

µA

If Circuit Shorted :

C >> C

Hipot Tester

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