Gossen Metrawatt AT3-III E Safety Tester Operating Instructions
Operating Instructions
AT3-III E Safety Tester
For Testing Single and 3-Phase Consumers
and Extension Cables in Combination with
SECUTEST.../SECULIFE ST Test Instruments
3-349-155-37
10/5.12
Safety tester AT3-III E
L3
L2
L1
!
1
2
3
4
5
6
12
7
10
11
9
16
15
15
15
8
13
SECUTEST
14
15
Device Plugs and Outlets
1 CEE outlet
3P+N+PE, 32 A, 400 V
2 CEE outlet
Indicator Displays
10 Function LED
2 GMC-I Messtechnik GmbH
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
9 Mains indicator lamps for L1, L2 and L3
Self-Test
11 Test key for triggering I
Connectors for
SECUTEST... (as of version 3.1) Test Instrument
12 Blue earthing contact outlet for power supply to
SECUTEST... test instruments
13 Earthing contact plug with cable, for insertion into the
test socket at SECUTEST... test instruments
14 SECUTEST port: for insertion into sockets 2 and 3 at the
SECUTEST... test instrument
15 Connector sockets for probe cable of the SECUTEST...
test instrument (for testing cables only)
AT3-III E Power Supply
16 Via connector cable with CEE plug
3P+N+PE, 16 A
SECUTEST... series test instruments are not included in
the scope of delivery.
n
(In = residual current)
Table of Contents
Note!
Page
1 Applications ...............................................3
2 Safety Precautions .....................................3
3 Connecting the Safety Tester to the Mains ... 4
4 Connecting a Device Under Test
to the Safety Tester ...................................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 .................5
5.4 Testing of Differential Current
during Automatic Testing per Test Standard ..6
5.5 High-Voltage Test ........................................6
6 Testing Extension Cables ...........................6
6.1 Measuring Protective Conductor Resistance ...7
6.2 Measuring Insulation Resistance ...................7
6.3 Testing for Short-Circuits, Interruptions and
Reversed Conductors ...................................7
7 Self-Test ....................................................8
8 Technical Data ...........................................8
9 Maintenance ..............................................9
10 Repair and Replacement Parts Service,
Calibration Center and Rental Instrument
Service .......................................................9
11 Product Support .........................................9
1 Applications
The portable safety tester, 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... (as of version 3.1)
test instrument.
Suitable instruments are identified in the following
pages with the following abbreviated designation:
SECUTEST....
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 following values are tested by the safety tester in
combination with a SECUTEST... test instrument:
• Protective conductor resistance
• Insulation resistance
• Dielectric strength (HV test) *
• Earth leakage current
• Residual current
• Contact current
• Protective conductor current (AC and DC are
tested separately) *
• For extension cables:
– Short-circuit
– Conductor continuity
And for 3-phase extension cables:
– Phase reversal at L1, L2 and L3
for substantiation of clockwise rotation
* Only if the utilized SECUTEST... is capable of performing this
measurement
Measurement results are displayed at the
SECUTEST... test instrument.
The AT3-I I I E safety tester 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.
2 Safety Precautions
The safety tester 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 safety
tester when used for its intended purpose in
combination with SECUTEST... 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 safety
tester into service, and that you follow all
instructions contained herein.
GMC-I Messtechnik GmbH 3
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