Gossen MetraWatt PROFiTEST DC-II Operating Instructions Manual

Operating Instructions

PROFiTEST DC-II

Test Instrument for the Suppression of RCCB Tripping
and for Tripping Tests of DC Components
in AC-DC Sensitive RCCBs

3-348-973-37

7/5.14

2 GMC-I Messtechnik GmbH

Contents Page

1 Safety Precautions .....................................2

2 Description .................................................3

2.1 Loop Resistance Measuring Mode with the

PROFiTEST... with Suppression of RCCB Tripping ...3

2.2 Tripping Test Operating Mode

for AC-DC Sensitive RCCBs ...................................3

2.2.1 With Rising DC Residual Current and Measurement of

Tripping Current for Undelayed RCCBs ...................3

2.2.2 With Rising DC Residual Current and
Measurement of Tripping Current for

Selective or Short-Time-Delay RCCBs ....................3

2.2.3 With Constant DC Residual Current and Measurement

of Time to Trip ......................................................4

3 Connecting the PROFiTEST DC-II Test

Instrument to the System Under Test ........4

3.1 Testing in Systems with Neutral Conductor .............4

3.2 Testing in Systems without Neutral Conductor ........4

4 Operation ...................................................5

4.1 Loop Resistance Measurement Mode
with the PROFiTEST... with

Suppression of RCCB Triggering ............................5

4.2 Tripping Test Operating Mode

for DC Components in AC-DC Sensitive RCCBs .......5

4.2.1 With Rising DC Residual Current
and Measurement of Tripping Current

for Undelayed RCCBs ............................................5

4.2.2 With Rising DC Residual Current
and Measurement of Tripping Current

for Delayed RCCBs ................................................6

4.2.3 With Constant DC Residual Current
and Measurement of Time to Trip

for Undelayed RCCBs ............................................6

5 Characteristic Values .................................6

6 Maintenance ..............................................7

6.1 Internal Fuse ........................................................7

6.2 External Fuse ........................................................7

6.3 Housing ...............................................................7

6.4 Recalibration ........................................................7

6.5 Return and Environmentally Sound Disposal ...........8

7 Repair and Replacement Parts Service

Calibration Center

and Rental Instrument Service ..................8

8 Product Support .........................................8

1 Safety Precautions

The PROFiTEST DC-II test instrument has been
manufactured in accordance with safety regula­tions EN 61010-1,

VDE 0411-1 and IEC 61010-1.
If used for its intended purpose, the safety of both
the operator and the instrument is assured. Their
safety is however not assured,

if the test instrument

is operated inco

rrectly or handled improperly.

The test instrument should only be connected to
the mains as long as is necessary to perform the
desired measurement, in order to avoid unneces­sarily high temperatures within the instrument.

Attention!

!

Always be certain to select the correct
line voltage when operating the test in­strument (voltage selector switch at the
right hand side of the housing labelled:
230/400 V).

Opening the instrument / repairs

The instrument may only be opened by autho­rized, trained personnel in order to ensure flawless
operation and to assure that the guarantee is not
rendered null and void.

Even original replacement parts may only be
installed by authorized, trained personnel.

If it can be ascertained that the instrument has
been opened by unauthorized personnel, no guar­antee claims can be honored by the manufacturer
with regard to personal safety, measuring accu­racy, compliance with applicable safety measures
or any consequential damages.

Any warranty claims will be forfeited when the
warranty seal has been damaged or removed.

Meanings of symbols on the instrument

Warning concerning a point of danger
(Attention: observe documentation!)

Protection class II device

EU seal of approval

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”.

Meaning of symbols in the operating instructions

Selective RCCB

Pulse-controlled RCCB

AC-DC sensitive RCCB

I

F

Rising DC residual current

!

S

GMC-I Messtechnik GmbH 3

2Description

2.1 Loop Resistance Measuring Mode
with the PROFiTEST...
with Suppression of RCCB Tripping

The PROFiTEST DC-II test instrument allows for
the measurement of loop resistance in TN
systems with RCCBs (10/30/100/300/500 mA
nominal residual current) without DC sensitive
components.

The test instrument generates a DC residual cur­rent which saturates the magnetic circuit of the
RCCB.
The PROFiTEST 0100S/S-I I,PROFi TEST 2 or
PROFiTEST



C superimposes a measuring current
which demonstrates only half-waves of like polar­ity. The RCCB cannot detect this measuring cur­rent and can thus no longer be tripped during
measurement.

2.2 Tripping Test Operating Mode
for AC-DC Sensitive RCCBs

2.2.1 With Rising DC Residual Current and
Measurement of Tripping Current
for Undelayed RCCBs

A slowly rising direct current is applied to N and
PE with the selector switch in the I

F

position.
The measured current value is displayed continu­ously. When the RCCB is tripped, the last mea­sured current value is stored for several seconds
and can be read from the display.

2.2.2 With Rising DC Residual Current and

Measurement of Tripping Current for
Selective or Short-Time-Delay RCCBs

The current ramp demonstrates a gradual overall
rise with the selector switch in the position.
Test duration is considerably longer. Use this
selector switch position for testing tripping current
for selective or short-time-delay AC-DC sensitive
RCCBs.

Start

t1 t3

Measure

t2

Active

RCCB inoperable!

t

I

F

/mA

Suppression of RCCB Tripping
with Pulse-Controlled RCCB

S

0.4 0.8 1.0 1.6 2.0 2.4 2.8 3.2 3.6 4.0 4.4 4.8

100

200

300

400

500

600

I

F

/mA

t/s

A residual current curve with a lesser slope
between 0 and 100 mA provides for
enhanced resolution.

Start

Tripping Occurs

A residual current curve with
a steeper slope as of
100 mA allows for more
rapid testing.

Measurement of Tripping Current for AC-DC Sensitive RCCBs