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Gossen Metrawatt AT3-III E Manual

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Operating Instructions
AT3-III E Test Adapter
For active and passive Testing Single and 3-Phase
Electric Devices and Extension Cables in Combination
with SECUTEST.../SECULIFE ST Test Instruments
as well as SECUTEST BASE(10) and PRO (Feature I01) 3-349-155-37
13/6.16
2GMC-I Messtechnik GmbH
Device Plugs and Outlets
1 CEE outlet
3P+N+PE, 32 A, 400 V
2 CEE outlet
3P+N+PE, 16 A, 400 V
3 Earthing contact outlet
1P+N+PE, 16 A, 250 V
4 Device outlet for cable testing
1P+N+PE, 10 A, 250 V
5 CEE plug for cable testing
3P+N+PE, 32 A, 400 V
6 CEE plug for cable testing
3P+N+PE, 16 A, 400 V
7 Earthing contact plug for cable testing
1P+N+PE, 16 A, 250 V
8 Device plug for cable testing
1P+N+PE 10 A 250 V
Indicator Displays
9 Mains indicator lamps for L1, L2 and L3
10 Function LED
Self-Test
11 Test key for triggering IΔn (IΔn = residual current)
Connectors for SECUTEST.../SECULIFE ST (as of version
3.1) Test Instrument
12 Earthing contact outlet for power supply to SECUTEST.../
SECULIFE ST test instruments
13 Earthing contact plug with cable, for insertion into the test
socket at SECUTEST.../SECULIFE ST test instruments
14
SECUTEST S2N+(10)(w)/SIII+/SECULIFE ST
port:
for insertion into sockets 2 and 3 at the test instrument
SECUTEST PRO (or feature I01) port: for insertion into
the sockets
V and COM
at the test instrument
15 Connector sockets for probe cable of the SECUTEST.../
SECULIFE ST test instrument (for testing cables only)
AT3-III E Power Supply
16 Via connector cable with CEE plug
3P+N+PE, 16 A
SECUTEST.../SECULIFE ST series test instruments are
not included in the scope of delivery.
Test Adapter AT3-III E
L3
L2
L1
!
123
4
56
12 7
10
11
9
16
15 15 15
8
13
SECUTEST
14
15
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.
4GMC-I Messtechnik GmbH
2 Safety Precautions
The test adapter has been manufactured and
tested in accordance with the following
regulations:
IEC 61010-1/DIN EN 61010-1/VDE 0411-1
“Regulations for electronic testers and controllers,
part 1: Safety measures for electrical measuring
instruments”
DIN VDE 0404 “Devices for technical safety
testing of electrical equipment, parts 1 and 2.”
EN 61326-1 product standard EMC requirements.
Safety is only assured for the user and the test
adapter when used for its intended purpose in
combination with SECUTEST.../SECULIFE ST test
instruments.
In order to maintain flawless technical safety
conditions, and to assure safe use, it is imperative
that you read these operating instructions
thoroughly and carefully before placing your test
adapter into service, and that you follow all
instructions contained herein.
Due to the fact that all tests performed with the AT3-
III E must be executed in combination with a
SECUTEST.../SECULIFE ST test instrument, you must
also read the safety precautions and liability limitations
included in the operating instructions for this
instrument.
Observe the following safety precautions:
Attention!
!
If the red LED (10) remains lit even after
the AT3-III E has been disconnected from
the mains and connected once again, the
test adapter is defective.
If this is the case,
the AT3-III E must be removed from service
and repaired before it is used again.
• In order to assure compliance with technical
safety requirements, the AT3-III E test adapter
should only be repaired by the manufacturer.
• The AT3-III E must be disconnected from the
mains and from the SECUTEST.../
SECULIFE ST test instrument before it is
opened.
Measurements within electrical systems are prohibited!
• The test adapter’s 16 A CEE 3P+N+PE (16)
plug may only be connected to 230/400 V
50 Hz mains power. In order to avoid
undesired shutdown of defective devices
under test, the electrical circuit for the device
under test should be separately fused.
• Before connecting the AT3-III E to the mains,
the SECUTEST.../SECULIFE ST test
instrument must first be connected to the
AT3-III E.
Attention!
!
Tests during which mains power is
applied may only be selected with the
function selector switch at the
SECUTEST.../SECULIFE ST test
instrument after safety class I devices
under test have passed the protective
conductor test.
If the protective conductor is defective
(interruptions / reversed conductors), line
voltage may be present at the housing of
a defective device under test, at the
earthing contacts of the test plugs (4 – 7)
and at the safety socket (15)!
•For REASONS OF SAFETY, the device under test
must be turned off before switching to
“MAINS” so that dangerous devices under
test (e.g. a circular saw) can only be switched
on intentionally.
• Be prepared for the occurrence of
unexpected voltages at devices under test
(e.g. due to charged capacitors).
• Before connecting the device under test to
the test adapter, subject it to a thorough
VISUAL INSPECTION first. Damaged devices
under test must be repaired prior to testing.
• Only extension cables which have been
plugged into the test outlets (1 – 4) at the test
adapter may be connected to the device
plugs (4 – 7) at the test adapter.
• Due to test adapter design in accordance with
DIN VDE 0404, the “PE” contacts at the
outlets (1 – 4) are only connected to the mains
protective conductor when the SECUTEST.../
SECULIFE ST test instrument has been set for
testing with mains power.
• If the test adapter and/or its connector cables
demonstrate visible damage, no longer
function, have been stored for a lengthy
period of time under unfavorable conditions or
have been subject to excessive stress during
transport, it must be assumed that hazard-
free operation is no longer possible. Remove
the AT3-III E from service and secure it
against inadvertent use in such cases.
Opening of Equipment / Repair
The equipment may be opened only by authorized
service personnel to ensure the safe and correct
operation of the equipment and to keep the
warranty valid.
Even original spare parts may be installed only by
authorized service personnel.
In case the equipment was opened by unauthorized
personnel, no warranty regarding personal safety,
measurement accuracy, conformity with applicable
GMC-I Messtechnik GmbH 5
safety measures or any consequential damage is
granted by the manufacturer.
Meanings of Symbols on the Instrument
Warning concerning a point of danger
(Attention: observe documentation!)
Indicates EC conformity
This device may not be disposed of
with the trash. Further information
regarding the WEEE mark can be
accessed on the Internet at
www.gossenmetrawatt.com by
entering the search term ’WEEE’.
3 Connecting the Test Adapter to the Mains
The following connections must first be
established before connecting the test adapter to
the mains:
a) Insert the mains plug from the
SECUTEST.../
SECULIFE ST
into the earthing contact outlet (12)
at the AT3-III E.
b) Insert the earthing contact plug (13) from the
AT3-III E into the test socket at the
SECUTEST.../SECULIFE ST.
c) In order to measure protective conductor
current, connect the SECUTEST port (14) of
the AT3-III E into sockets 2 and 3 at the
SECUTEST.../SECULIFE ST or into sockets V
and COM at the SECUTEST PRO.
d) In order to test extension cables, insert the test
probe at the end of the SECUTEST... probe cable
into the socket (15) at the AT3-III E.
Connect the test adapter to 230/400 V mains
power. The test adapter now performs a self-test.
If the tester is intact, the red LED lights up briefly.
4 Connecting a Device Under Test
to the Test Adapter
After the device under test has passed a visual
inspection and before connecting it to the
appropriate plug or socket at the test adapter, as
well as before each new test, the SECUTEST.../
SECULIFE ST test instrument must be returned to
its initial setting depending upon the type of test.
Connect the device under test to the test adapter
and switch all of its functions on, making sure
that, for example, thermostat contacts are closed
etc. Always measure protective conductor
resistance first for safety class I devices, because
if the protective conductor is defective, insulation
resistance, equivalent leakage current and
protective conductor current cannot be
measured, and high-voltage testing cannot be
performed.
5 Testing Devices
Perform testing in accordance with the operating
instructions included with the SECUTEST.../SECULIFE ST
test instrument!
Observe the following instructions when using the
SECUTEST.../SECULIFE ST in combination with the AT3-
III E during automatic test sequence :
5.1 Measuring Protective Conductor Resistance
The clip or the test probe at the end of the probe
cable from the SECUTEST.../SECULIFE ST test
instrument must be connected to the housing of
the device under test such that good contact is
assured.
Note!
Connector cable (13) resistance is 0.07 Ω. In
order to compensate for this error, proceed
as described in the operating instructions
included with the
SECUTEST.../SECULIFE ST test instrument
under Individual Measurements → Protective
Conductor Resistance → Zero Balancing.
If the AT3-III E is out of use for a prolonged period
of time, the earthing contact faces of the plug-
and-socket connectors and the connecting plug
(13) may corrode, thus leading to slightly elevated
resistance measurement values. In this case, plug
and unplug the connections several times until the
expected values are reached again.
5.2 Measuring Insulation Resistance and Equivalent
Leakage Current
L1, L2, L3 and N (short-circuited) are measured
against PE during insulation testing.
5.3 Measuring Protective Conductor Resistance with
the Residual Current Method (except for
SECUTEST BASE(10))
The DUT is placed into operation during residual
current measurement. The L1, L2 and L3 mains
lamps light up at the AT3-III E during this test.
This measurement may not be performed on safety
class I devices until after the protective conductor test
has been passed in accordance with chapter 5.1.
ÐTurn off the device under test.
ÐSelect the IL-DI measurement setting at the
SECUTEST.../SECULIFE ST.
ÐThe line contactor switches mains power to
the test outlets (1 – 4) at the AT3-III E. Signal
lamps L1, L2 and L3 indicate the presence of
line voltage.
ÐNow switch on the DUT
(as described in chapter 2).
Contact current is measured by means of residual
current measurement for safety class II devices,
!
6GMC-I Messtechnik GmbH
and safety class I devices with accessible
conductive parts which are not connected to the
protective conductor. Contact all accessible
conductive parts at the device under test with the
test probe at the end of the probe cable form the
SECUTEST.../SECULIFE ST to this end.
These measurements must be performed with the plug
in both positions for DUTs with earthing contact plugs!
Note!
This test must be performed in accordance
with the specified test sequence.
Mains power
must be indicated by signal lamps L1, L2 and L3 (9)
before switching the device under test on.
The test outlets (1 – 4) are disconnected
from the mains by the safety shutdown
function included with the AT3-III E for
devices under test with fault currents of
greater than 18 mA during measurement of
protective conductor current with residual
current. Mains power may be disconnected
if the AT3-III E is used in systems protected
with RCCBs rated less than 30 mA. Mains
signal lamps L1, L2 and L3 (9) go out. The
function LED (10) blinks.
Disconnect the AT3-III E from the mains to reset.
Reconnect the AT3-III E to the mains. The test adapter
is once again ready for use after a brief self-test.
The short-circuit test displayed at the
SECUTEST.../SECULIFE ST cannot be performed
due to safety impedances which have been
integrated into the AT3-III E for testing 3-phase
devices.
Figure 1 Connecting Single and 3-Phase Devices to the AT3-III E and the SECUTEST...
230/400 V 50 Hz
test adapter AT3-III E
L3
L2
L1
!
SECUTEST
13
230/400 V 50 Hz
test adapter AT3-III E
L3
L2
L1
!
SECUTEST
13
SECUTEST PRO
COM V 1
GMC-I Messtechnik GmbH 7
5.4 Testing of Differential Current
during Automatic Testing per Test Standard
SECUTEST SII / SIII / SECULIFE ST:
ÐInitiate the standard-specific setup.
ÐSelect „Sequence“ and deactivate the auto-
matic test method.
During testing according to standard, a menu
appears which proposes two options, i.e. equiva-
lent leakage current and differential current.
ÐSelect „Differential current“.
SECUTEST S2N+ / S2N+10 / S2N+W:
ÐSelect switch position „active“ here.
Line voltage is applied to the DUT via the AT3-III E
tester. The differential current of the DUT is mea-
sured while allowing for a function test of the DUT.
SECUTEST PRO (or feature I01):
Ð
Select connection type AT3-adapter for IPE
measurement in the setup of the test sequence.
5.5 High-Voltage Test
Caution: High-Voltage!
Prior to performing the test remove the
probe including probe tip from sockets 4
and 5 of the SECUTEST.../SECULIFE ST.
Do not touch the DUT, the device plug
and the earthing contact cable of the
AT3-III E during the voltage test.
Do not unplug the AT3-III E connector
cable (13) from the test socket at the
SECUTEST.../SECULIFE ST: the device
under test may still be charged, and high
voltage may be present at the earthing
contact plug.
During this test, L1, L2, L3 and N (short-circuited)
are measured against PE with the preset high
voltage (max. 1.5 kV!).
Please observe all additional safety precautions
on performing the test as well as the note on the
exclusion of liability in the operating instructions of
the SECUTEST... test instrument.
6 Testing Extension Cables
The SECUTEST port (14) may remain connected
to sockets 2 and 3 at the SECUTEST.../
SECULIFE ST during this test. Perform testing in
accordance with the operating instructions
included with the SECUTEST... test instrument!
Observe the following instructions when using the
SECUTEST.../SECULIFE ST in combination with
the AT3-III E:
The test probe at the end of the probe cable of the
SECUTEST.../SECULIFE ST must first be
connected to the respective socket (15) (probe 1
to 4) of the associated plug at the AT3-III E. In
order to test, only connect the plug and socket at
the ends of the respective extension cable to be
tested to the associated device plug and socket at
the AT3-III E. The associated connection
diagrams are shown on the following pages.
SECUTEST SII / SIII / SECULIFE ST:
Select the following test sequence from the initial
window at the SECUTEST.../SECULIFE ST test
instrument:
Extension cable: “X” WITH EL1
Note!
Testing cables by means of the AT3-III E is
only possible with this setting.
SECUTEST S2N+ / S2N+10 / S2N+W:
ÐSelect the following switch position:
VDE 0701-0702
ÐSelect EL1 as connection type.
SECUTEST BASE(10)/PRO (or feature I01):
ÐSelect AT3-III E as connection type.
6.1 Measuring Protective Conductor Resistance
Testing is performed according to the instructions
included in chapter 5.1.
6.2 Measuring Insulation Resistance
L1, L2, L3 and N (short-circuited) are measured
against PE during insulation testing. Due to good
cable insulation, a value of 2 MΩ should not be
significantly exceeded.
Note!
In conductors with control lamp (usually glow
lamp in the switch), the result of the
continuity test for L and N may be distorted
by the additional resistance of the glow
lamp.
In case of doubt, we recommend performing
a continuity test for L and N by means of
resistance measurement (R-PE or R-ISO):
e. g. SECUTEST S2/ S3...: R-PE between probe
and socket 3 or R between socket 1 and 2.
SECUTEST PRO: R-PE between probe 1 and
probe 2.
SECUTEST BASE(10):
R-PE between probe 1
and measurement cable at the earth contacts
of the test socket (test type PE(PD)-P1).
8GMC-I Messtechnik GmbH
6.3 Testing for Short-Circuits, Interruptions and
Reversed Conductors
Testing of single-phase cables is performed as
described in the instructions included with the
SECUTEST.../SECULIFE ST under (optional EL1
test adapter). The EL1 test adapter accessory is
included in the AT3-III E as a subassembly.
Note!
While testing the continuity of single-phase
extension cables, AT3-III E may NOT be sup-
plied with line voltage.
While testing the continuity of 3-phase exten-
sion cables, AT3-III E must be connected
with line voltage.
Note:
When testing device cable connections (socket
4/plug 4) polarity L/N is not being checked.
Testing of 3-phase cables is the same, except that it
also includes an additional test for reversing of
conductors L1, L2, L3 and N.
3-phase cables have only passed testing for
short-circuits, interruptions and reversed
conductors (clockwise rotation) if the following test
result appears: “Cable OK”.
Messages such as “interruption / short-circuit”
always indicate that the cable is defective. If this is
the case, conductors L1, L2, L3 and N may also
be reversed. The actual defect must be
determined.
Figure 2 Connecting Single or 3-Phase Extension Cables to the AT3-III E with the SECUTEST...
SECUTEST
34
4
4
3
SECUTEST
1
2
21
230/400 V 50 Hz
230 V 50 Hz
GMC-I Messtechnik GmbH 9
Figure 3 Connecting Single or 3-Phase Extension Cables to the AT3-III E
with the SECUTEST BASE(10)/PRO
SECUTEST
34
4
4
3
SECUTEST
1
2
21
230/400 V 50 Hz
SECUTEST BASE(10)/PRO
230 V 50 Hz
1
1
SECUTEST BASE(10)/PRO
… 9 …


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