Bedienungsanleitung Gossen Metrawatt AT3-III E (Seite 3 von 12) (Englisch)

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GMC-I Messtechnik GmbH 3

Table of Contents

Page

1 Applications ...............................................3

2 Safety Precautions .....................................4

3 Connecting the Test Adapter to the Mains 5

4 Connecting a Device Under Test

to the Test Adapter ....................................5

5 Testing Devices .........................................5

5.1 Measuring Protective Conductor Resistance ...5

5.2 Measuring Insulation Resistance and Equivalent

Leakage Current ..........................................5

5.3 Measuring Protective Conductor Resistance with

the Residual Current Method (except for

SECUTEST BASE(10)) ...................................5

5.4 Testing of Differential Current

during Automatic Testing per Test Standard ..7

5.5 High-Voltage Test ........................................7

6 Testing Extension Cables ...........................7

6.1 Measuring Protective Conductor Resistance ...7

6.2 Measuring Insulation Resistance ...................7

6.3 Testing for Short-Circuits, Interruptions and

Reversed Conductors ...................................8

7 Self-Test ..................................................10

8 Technical Data .........................................10

9 Maintenance ............................................11

10 Repair and Replacement Parts Service,

Calibration Center and Rental Instrument

Service .....................................................11

11 Product Support .......................................11

1 Applications

The portable test adapter, which can also be

permanently mounted with the wall bracket, is

used for measuring and testing single and

3-phase electrical devices and extension cables in

combination with SECUTEST.../SECULIFE ST (as

of version 3.1) test instrument.

Suitable instruments are identified in the following

pages with the following abbreviated designation:

SECUTEST.../SECULIFE ST.

Testing must be performed by a qualified

electrician with an appropriate test instrument

after repair or modification, and is also required for

periodic testing per DIN VDE 0105/0701-0702.

According to these regulations, testing must be

performed for protective conductor resistance,

insulation resistance, equivalent leakage current,

residual current and contact current, as well as for

the absence of voltage depending upon the type

of device under test.

The test adapter, in combination with the SECUTEST.../

SECULIFE ST test instrument, allows for

– the passive testing:

• of protective conductor resistance

• of insulation resistance

• of protective conductor current by means of

equivalent leakage current method

• of dielectric strength (HV test up to 1.5 kV)1)

• at extension cables:

– testing for conductor short-circuiting,

– testing for conductor interruption

and aditionally at 3-phase extension cables:

– testing for conductor reversal on L1, L2

and L3

for the determination of clockwise rotation.

• with protection by means of electronic resid-

ual current monitoring with mains shutdown

at DUTs with residual current of more than

20 mA and visual error messages

– the active testing: (nominal current 16 A –

maximum 20 A current consumption by DUT)

• of protective conductor current 1 3

– by means of the differential current method

(requires voltage measurement sockets at

SECUTEST.../SECULIFE ST 2)

– by means of direct method (requires direct

measurement of protective conductor

current at SECUTEST.../SECULIFE ST)

• of contact current 3

1only if the utilized SECUTEST.../SECULIFE ST is

capable of performing this measurement

2not with SECUTEST BASE(10), but with

SECUTEST PRO and/or Feature I01

3Please note that the pole reversal function is not active

with the applied test instrument if you use the AT3-IIIE

adapter for the testing of single-phase test objects

(socket 3 / earthing contact plug). In this case, all

leakage current measurements must be performed

manually in both pole directions.

Measurement results are displayed at the

SECUTEST.../SECULIFE ST test instrument.

Note!

The AT3-III E test adapter is equipped with

electronic error monitoring which

disconnects the device under test from the

mains in the event of fault currents of greater

than 18 mA.

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