Gossen Metrawatt AT32-DI Manual

Gossen Metrawatt Måleudstyr AT32-DI

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AT32-DI

3-Phase 32 A Current Adapter with Residual Current Logging 3-349-353-03

8/4.21

Operating Instructions

1 Applications

Devices which are equipped with a 5-pole, AT32-DI 32 A / 6 h

CEE plug can be quickly and efficiently tested with the CEE

adapter. Connect the adapter to a test instrument which is

designed for testing portable devices, is equipped with an earth-

ing contact outlet for connecting the device under test and is

capable of directly measuring protective conductor current.

The following tests can be performed on devices with CEE plugs

with the help of the AT32-DI adapter:

• Testing of protective conductor continuity

• Insulation resistance measurement

• Protective conductor current measurement in the following

measuring modes:

– Direct (direct method via test socket)

– Differential (differential current measuring method)

– Alternative (equivalent leakage current measuring method)

Attention!

Application Restrictions

The CEE adapter AT32-DI may only be used for its in-

tended purpose and only with test instruments in accor-

dance with DIN VDE 0404 or IEC 61557-16.

Other use of the adapter, in particular for continuous

connection of 3-phase current devices to 3-phase elec-

trical systems, is not permissible under any circum-

stances!

In any case, maximum permissible conventional thermal

current is 30 A AC per phase.

2 Safety Features and Precautions

The CEE adapter is manufactured and tested in accordance with

safety regulations IEC 61010-1 / EN 61010-1 / VDE 0411-1.

When used for its intended purpose, safety of the operator, as

well as that of the instrument, is assured.

The instrument may only be connected to electrical systems (TN, TT or IT)

with a maximum of 240 V which complies with applicable safety regula-

tions (e.g. IEC 60346, VDE 0100) and is protected with a fuse or circuit

breaker with a maximum rating of 32 A.

Carefully read the operating instructions before use, in particular

the operating instructions included with the test instrument with

which you intend to use the adapter. Follow all instructions con-

tained therein.

The adapter may only be used for testing devices with 5-pin CEE plugs

and current consumption of no greater than 3 x 32 A (AC1).

The AT32-DI CEE adapter may not be used:

• With open housing

• If external damage is apparent

•

If the CEE outlet or the connector cable is damaged

• After excessive stress, i.e. if the load capacities specified in

the technical data have been exceeded

• After a long period of storage under unfavorable conditions

(e.g. humidity, dust or extreme temperature)

Measurement with line voltage:

Exposed parts may conduct dangerous touch voltage during

testing. Do not touch under any circumstances! Use a special

cover in order to avoid touch contact.

Under certain circumstances, full mains disconnection at the

device side may not occur in the event of leakage current, or it

may be inadequate to meet the requirements of a PRCD.

Work only at a protected workstation, i.e. use enhanced touch

protection, use a 30 mA RCD and wear personal safety equip-

ment (PSE).

3 Meanings of Symbols on the Instrument

Warning concerning a point of danger

(attention, observe documentation!)

CAT II Measuring category II device

CE Conformity Marking

This device may not be disposed of with the trash. Fur-

ther information regarding the WEEE mark can be

accessed on the Internet at www.gossenmetrawatt.com

by entering the search term “WEEE”.

4 Connecting the AT32-DI

Before testing can be started, the AT32-DI must be connected to

the test instrument and to mains power. Proceed as follows:

➭Connect the mains cable from the test instrument to the

earthing contact outlet labeled “Tester Outlet” included on the

AT32-DI.

➭Connect the earthing contact cable from the AT32-DI to the

test/mains outlet at the test instrument. The connection at the

AT32-DI is labeled “to test instrument test/mains outlet”.

➭Plug the CEE connector cable from the AT32-DI into a suitable

32 A / 6 h CEE outlet within your electrical installation. The

connection at the AT32-DI is labeled “Mains, 3~ 400 V, 32 A

50...60 Hz”. As of this point in time, the AT32-DI and the test

instrument are supplied with electrical power.

➭Finally, connect the device under test to the CEE outlet at the

AT32-DI. The outlet is labeled “To test/mains outlet for DUT

connection”.

Testing can now be started (see section 5).

5 Testing with the AT32-DI

You can now execute all tests which are otherwise possible with

the test instrument, and which are supported by the AT32-DI

adapter,

on devices with CEE plugs just as you would for devices with

earthing contact plugs. Proceed as described in the operating

instructions for the test instrument to this end.

AT32-DI

3-Phase 32 A Current Adapter with Residual Current Logging

Edited in Germany • Subject to change, errors excepted • PDF version available on the Internet

All trademarks, registered trademarks, logos, product names, and company names are the property of their respective owners.

Gossen Metrawatt GmbH

Südwestpark 15

90449 Nürnberg • Germany

Phone +49 911 8602-111

Fax +49 911 8602-777

E-Mail info@gossenmetrawatt.com

www.gossenmetrawatt.com

The following characteristics of the AT32-DI adapter must be

taken into consideration when performing tests with the test

instrument:

•

During insulation or equivalent leakage current testing, the three

phase terminals (L1, L2 and L3) and the neutral terminal (N) at the

DUT are short circuited.

• When testing protective conductor resistance, measured pro-

tective conductor resistance is increased by an amount which

results from the protective conductor system of the AT32-DI

CEE adapter itself.

If the adapter has not been used for a long period of time,

contact resistances in the internal relays may increase.

If this is the case, the relays should be activated several times.

Connect the adapter several times in succession to an earth-

ing contact outlet with a nominal voltage of 230 V to this end

(orange lamp on the AT32-DI lights up). In case of doubt, i.e. if

measurement results are close to the permissible limit value,

measure the adapter’s protective conductor resistance at the

PE terminal of its CEE outlet, and subtract the results from the

measured value obtained for the DUT-adapter system. (use

your test instrument’s zero balancing function to this end).

• In order to measure protective conductor resistance using the resid-

ual current method, set the measurement type selector switch to



(residual current). During 3-phase residual current measurement, the

resulting residual current is transmitted via the protective conductor

to the test instrument as protective conductor current, and recorded.

• In order to measure protective conductor current directly, set

the measurement type selector switch to I

direct.

Note

Protective conductor current can only be detected by test

instruments which offer direct leakage current measure-

ment as a measuring method. The operating instructions

for the test instrument must be observed in this regard.

• Before executing the leakage current measurement, or any

other tests for which the DUT is supplied with mains power

and must be placed into operation, it must be assured that

there are no short-circuits in the DUT between phase conduc-

tors L1, L2 and L3 and/or neutral conductor N! Nonob-

servance may result in damage to, or destruction of the

AT32-DI adapter, and possibly the device under test as well!

• Always start the test at the test instrument (orange lamp on

the AT32-DI lights up) before switching the device under test

on! In the case of extreme initial current at the DUT, nonob-

servance of this startup sequence may result in damage to, or

destruction of the AT32-DI adapter!

Attention!

Disabling of Protective Devices – Max. Current Consumption

As soon as the orange lamp at the AT32-DI lights up, the

terminals at the mains outlet from which power is sup-

plied are connected to the test/mains outlet at the AT32-

DI adapter without the use of a fuse or any other protec-

tive devices. Make sure that only devices designed for

use with 3-phase current with a maximum current con-

sumption of 3 x 32 A (AC1) are connected to this outlet.

Attention!

Testing the DUT for Short-Circuits

Short-circuiting of two or all three phases of the device

under test cannot be detected by the test instrument

until after residual current testing has been executed! In

such cases, the AT32-DI adapter may be severely dam-

aged as a result of current surges when this test is exe-

cuted!

Before connecting a device to the AT32-DI, make sure that

there are no short-circuits between the DUT’s phases by means

of appropriate testing, for example with a continuity tester!

Attention!

Connection of the DUT in Correct Phase Sequence

In particular after repairing 3-phase devices or connect-

ing new CEE plugs to such devices, make sure that the

phases are connected in the correct sequence.

Attention!

Test Sequence – Initial Current Problem – Starting the Test

Always start the test at the test instrument (orange lamp

on the AT32-DI lights up) before switching the device

under test on!

– Ending the test

Switch the DUT off first, and then stop testing at the test

instrument. In the case of extreme initial current at the

DUT or inductivity within the electrical circuit, nonob-

servance of this sequence may result in damage to, or

destruction of the AT32-DI adapter!

6 Characteristic Values

Electrical Safety

Protection class

I per DIN EN 61140/VDE 0140-1

Operating voltage 300 V

Test voltage 2.2 kV

Current-carrying

capacity 30 A continuous 3-phase current / 35 A

(AC1) brief operation, 15 min.

Intrinsic connected load

“Mains active” 7 VA, cos 0.5

Measuring category II

Pollution degree 2

EMC EN 61326-1

Residual Current

Measuring range 0.08 to 10.0 mA AC

Inherent error 4% rdg.  40 A

Operating uncertainty

6% rdg. 60 A

Mechanical Design

Protection Housing: IP 40, connections: IP 20

Dimensions W x H x D: 320 x 120 x 105 mm

(without cables and grommets)

Weight 2.75 kg

Produkt Specifikationer

Mærke:	Gossen Metrawatt
Kategori:	Måleudstyr
Model:	AT32-DI

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