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09/15/04

Test station for fully automatic test sequence

 

Fully automatic test system shipped for the homologation testing of large household devices. Using the computer-controlled function and safety test system, cookers and similar products of a leading supplier of household devices in Turkey are subjected to thorough testing in the development stage and as a means of series monitoring.

Teststation für vollautomatischen Prüfablauf

The system is composed of a double system rack 19"43HE and a separate electronic voltage source for supplying test items with 60 Hz mains frequency.

To test this system, models 90-1K, 90-2E, 90-2C, 90-3K and 90-2M were selected from the Elabo standard test unit range and configured in accordance with the customer′s requirements.

The protective earth conductor test is performed manually using the PE test sensor. All the other tests are performed fully automatically or after actuating the two-hand operation console.

The test system is controlled entirely by computer with a graphic user interface under Windows NT. The computer guides the system operator when performing the tests. A menu system is used to access the individual components of the software (e.g. test program, test plan administration, user administration, etc.). To prevent unauthorised usage, the test engineer is required to enter his name and password at system start-up. By generating test plans, it is possible for the test system to be adapted to new or modified products. The parameters of the test item and the tests are freely definable within the defined limits.

 

Tests:

 

PE resistance measurement with 90-2CZ:

Output voltage max. 12 V

Test current, preselectable 10 to 80 A

Adjustable maximum PE resistance Rmax (0 to 500 mOhm)

 

Insulation resistance measurement with 90-2E:

Test voltage 10 to 500 V DC

Measuring range 0 to 10 / 100 mOhm

Limit value Rmin for error evaluation is defined in the test plan.

 

High-voltage test with 90-1K:

High voltage 0 to 5 kV AC

Tripping current adjustable from 0 to 100 mA

If required, this test can be performed under operating voltage.

 

Leakage current measurement at single/three-phase consumers with 90-2M:

Test voltage 0 to 300 / 450 V via internal transformer unit

Test item current max. 40 A three-phase or 60 single-phase

Frequency 50 / 60 Hz

Measuring ranges 1 mA / 10 mA

Test method as per EN 60335-1

 

Resistance measurement with 90-3K:

Measuring ranges 0.2 / 2 / 20 / 200 Ohm; 2 / 20 / 200 / 2000 kOhm

 

Function test at single/three-phase consumers:

Output measurement 0 to 35 kW

Current measurement 3 x 0 to 60 A

Voltage measurement 3 x 0 to 300 / 450 V

 

 

Source: elabo GmbH

Author: Christian H. Bunke / Thomas Seeger

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