Atec 19020 User Manual

Multi-Channel Hipot Tester

MODEL 19020 SERIES

Key Features :

■ 10 channels in one design

■ 10 sets of sync output and measurement

■ AC/DC/IR 3 in 1 EST test

■ Master/Slave link - 10 units max.

■ Programmable V-output and limits

■ OSC (Open/Short Check)

■ Flashover detection

■ 5kVAC & 6kV DC hipot test

■ 1MΩ~50GΩ insulation resistance test

■ Standard RS232 / Handler interface

■ Optional GPIB interface

■ Large LCD panel

■ Key lock function

■ CE Mark

MULTICHANNEL HIPOT TESTER MODEL 19020 SERIES

High Eciency Hipot Test Solution

Hipot test is one of the major test items in electrical safety test. All electrical components and products including transformers, capacitors, power supplies, chargers and home appliances all require Hipot test.

Wi th more tha n 2 5 ye ars of ex pe ri en ce in de vel o p i ng t h e i n st ru me nts fo r t es t an d measurement, Chroma creates the 19020 multichannel Hipot tester with a brand new architecture. It can measure the Hipot leakage current of all channels at the same time and conduct tests on 100 DUTs maximum simultaneously.

There is no need to purchase various Hipot testers to save the production line space. I ts one time multi -c hannel tes t can increase the eff iciency of e le ctrica l re gul atory test . It i mpr ov es t he productivity and reduces the risk of test for the products that require Hipot test only.

Chrom a 190 20 also has powe rful func tion s in Fla shover detection and Open/S hort Check . It contains several international patents and is the best tool for electrical regulatory Hipot test as not only reliable quality can be obtained, but highly ecient test platform can also be created.

World's First Sync Hipot Test (Patent Registered)

Chroma 19020 has equipped wit h the world 's firs t sync Hi pot test functio n that on e single unit can perform 10 channels sync output and measurements simultaneously. Maximum 10 units (master & slave) can be controlled to have 100 channels in total. They can be grouped for output to avoid creating voltage dierence due to adjacent tests as well as to improve the productivity.

Applications

Chroma 19020 can be applied to various electrical products for time consuming tests such as quality assurance sampling test and production line test.

• Power cord

• Capacitor

• Resistance

• Switch

• Connector

• Transformer

• Charger

• Adapter

out

SYNCHRONOUS HI-POT TEST

The issue frequently encountered when testing multiple DUTs for Hipot is unable to synchronize the voltage output. When planning for production line or

automation, minimized facility and optimized space are often utilized in the plant; therefore, the distance between two DUTs is usually very short. Taking the

output voltage 5kVac for example, when the output of Hipot tester is not synchronized, the two DUTs may create a discharge of high voltage dierence (up

to14kV peak-peak) and cause the xture to be damaged and erroneous judgment. Chroma 19020 synchronizes the output signal so there is no high voltage

dierence on the adjacent two ends that not only can extend the life of production equipment but also reduce the occurrence of misjudgment.

~0kV

Figure 1 : Unsynchronized Output

~14kV p-p

10 Channel Output

Figure 2 : Synchronized Output

FLASHOVER DETECTION

Same as other Chroma EST Series, 19020 has Flashover detection function. Flashover is the electrical discharge generated by high electric eld inside or on the

surface of insulation material that makes the DUT to lose its insulation characteristic and form a transient or discontinuous discharge. It can cause a carbonized

conductive path or damage the product under test. Flashover cannot be detected by monitoring leakage current only. The change rates of test voltage or

leakage current are monitored to detect ashover as its detection is one of the most indispensable test items for electrical safety test.

Gap Discharge Voltage

Test Voltage Waveform

Gap Discharge Voltage

180 360

Leakage Current (normal capacitive)

-10

Figure 3 : Normal Leakage Current Waveform

180 360

Leakage Current (abnornmal with ashover)

-10

Figure 4 : Leakage Current Waveform when Flashover occurred

OPEN / SHORT CHECK (OSC)

OSC function can check if there is any Open (bad connection) or Short (DUT short circuited) occurred during test. If a DUT is open circuit during test, the unit might be misjudged as a good one. If a DUT has short circuit, OSC function can lter it out to diminish the damage to xture and save the test cost.

In general, products under Hi-pot test have capacitance (CX). CX could be tens of pF to several μF in normal condition. When the circuit connection is interrupted, a small capacitance (Cc in Figure 6) will be formed on the broken interface that is usually lower than 10pF. It makes the entire capacitance of the product lower than normal value. The capacitance of a product may be higher than normal when the product is short-circuited or near short circuit. Thus the high/low limit of capacitance variation can be used to identify the short circuit problem.

µA

Figure 5 : Normal Connection Figure 6 : Connection Open Figure 7 : Connection Short

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