Gossen metrawatt Profitest prcd User manual

Operating Instructions

PROFITEST⏐PRCD

Adapter for Standards Compliant Testing of PRCDs

by Simulating Faults 3-349-797-15

7/4.19

Important

Read carefully before use!

Keep on file for future reference!

Please observe the manufacturer‘s details

on the devices under test!

2GMC-I Messtechnik GmbH

Connections Overview

1 Coupling plug to the outlet of a

3-phase PRCD

2 Earthing contact plug to the outlet of a

single-phase PRCD

3 Probe socket for contacting the on/off

key on the PRCD

4 Earthing contact socket to the inlet of a

single-phase PRCD

5 Loop for measuring protective conductor

current with a current clamp transformer

6 CEE socket to the inlet of a 3-phase

PRCD

7 Mains power cable with earthing contact plug

8 3-phase mains power cable with

CEE outlet (1P+N+PE 16 A-6h)

9 PRCD inlet sockets connected in parallel

to sockets 4 and 6 – for connecting the

PROFITEST MXTRA during protective con-

ductor and insulation measurements

10 PRCD outlet sockets connected in paral-

lel to plugs 1 and 2 for connecting the

PROFITEST MXTRA during protective con-

ductor and insulation measurements

11 Five replaceable fuses

Instrument Overview

Mains Connection

To PRCD Outlet

To PRCD Inlet (PRCD IN)

(PRCD OUT)

Fault Selection Mains disconnect, 1~OFF/3~OFF

– For RISO measurement

Mains power on, 1~ON/3~ON

– For fault simulation

– For RLO measurement

Phase LEDs

Phase Interrupt

Reversed Wires

Orange positions: testing at single-phase PRCDs

Green positions: testing at 3-phase PRCDs

Mains

– For tripping test with INom

and measurement of time to trip

Connection

PROFITEST⏐PRCD Operating and Connections Overview

GMC-I Messtechnik GmbH 3

Meanings of Symbols on the Instrument

300 V CAT II

Maximum permissible voltage and

measuring category between con-

nections and ground

Warning concerning a point of

danger

(attention:

observe documentation!)

Indicates European 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.gossenme-

trawatt.com by entering the

search term “WEEE”.

Meanings of Symbols in the Operating Instructions

LED L1, L2, L3, N or PE at test adapter

LED on LED off

PRCD LED at the device under test

LED on LED off

Scope of Delivery

1 Test adapter

1 Probe cable with plug-in test probe

1 Set of operating instructions

Table of Contents Page

1 Safety Precautions .................................... 4

2 Applications .............................................. 5

3 Initial Start-Up ........................................... 6

3.1 Testing the LEDs ......................................... 6

3.2 Mains Connection ....................................... 6

3.3 Connecting the PRCD .................................. 7

4 Measurements with the

PROFITEST MXTRA .................................... 7

4.1

Measuring Protective Conductor Resistance (Rlo) ....... 7

4.2

Measuring Insulation Resistance (Riso) ............. 8

4.3

Tripping Test with Nominal Residual Current and

Measurement of Time to Trip ............................... 8

4.4 Varistor Test (PRCD-K) ................................. 9

5 Protective Conductor Current Measurement 9

6 Fault Simulation ...................................... 10

6.1 PRCD-S (single-phase) ............................. 10

6.1.1 Simulated Interruption ....................................... 10

6.1.2 Simulated Wire Reversal .................................... 10

6.1.3 Simulation of PE to Phase – PE-UEXT ................. 10

6.1.4 Contacting the “ON” Key at the PRCD with the Probe......11

6.2 PRCD-K (single-phase) ............................. 11

6.2.1 Simulated Interruption ....................................... 11

6.3 PRCD-S (3-phase) .................................... 12

6.3.1 Simulated Interruption ....................................... 12

6.3.2 Simulated Wire Reversal .................................... 13

6.3.3 Simulation of PE to Phase ................................... 13

7 Characteristic Values .............................. 14

8 Maintenance ........................................... 14

8.1 Housing Maintenance ................................ 14

8.2 Safety Checks – Testing in Compliance with

DGUV Provision 3 ...................................... 15

8.2.1

Testing of Protective Conductor Resistance RPE ............15

8.2.2 Testing of Insulation Resistance: ......................... 15

8.2.3 Contact Current Measurement ............................ 16

8.3 Fuse Replacement ..................................... 16

8.4 Return and Environmentally Sound Disposal 16

Repair and Replacement Parts Service, Calibration

Center and Rental Instrument Service ................. 16

10 Product Support ...................................... 16

PROFITEST⏐PRCD Symbols – Scope of Delivery – Table of Contents

4GMC-I Messtechnik GmbH

1 Safety Precautions

The test adapter has been manufactured

and tested in accordance with the following

safety regulations:

IEC/EN 61010-1 / VDE 0411-1, DIN VDE

0404, IEC/EN 61577 / VDE 0413-2,-4 /

DIN EN 61557-16 / VDE 0413-16 (draft)

Safety of the operator, as well as that of the

test adapter and the PRCD, is only assured

when it is used for its intended purpose.

Read the operating instructions carefully and

completely before placing your test instrument

into service. Follow all instructions contained

therein. Make sure that the operating instructions

are available to all users of the instrument.

Read the operating instructions for the PROFITEST

MXTRA as well, in particular the sections con-

cerning the RLO, RISO and time-to-trip measure-

ments, as well as the tripping test.

Tests may only be performed by a qualified

electrician, or under the supervision and

direction of a qualified electrician. The user

must be instructed by a qualified electrician

concerning performance and evaluation of

the test.

Observe the following safety precautions:

• The instrument may only be connected

to electrical systems with a maximum of

230/400 V which comply with applicable

safety regulations (e.g. IEC 60346, VDE

0100) and are protected with a fuse or

circuit breaker with a maximum rating of

16 A.

• The test adapter may only be used for

testing PRCDs.

• No power consuming devices may be

connected to the earthing contact and

CEE sockets.

• The test adapter may not be used as an

extension cord.

• Measurements within electrical systems

are prohibited.

• Make certain that the measurement

cables are in flawless condition, e.g. no

damage to insulation, no cracks in

cables or plugs etc.

• When using a test probe with coil cord

(PROFITEST MXTRA):

Grip the tip of the test probe firmly, for

example during insertion into a jack

socket. Tensioning at the coil cord may

otherwise cause the test probe to snap

back resulting in possible injury.

• Touch current at the probe socket is

limited by the internal protective circuit to

less than the maximum permissible value

of 0.5 mA in accordance with

DINEN61010-1.

• Insulation resistance can only be mea-

sured at voltage-free objects.

• Do not touch the insulation measuring

instrument’s test probes (PROFITEST

MXTRA) during insulation resistance mea-

surements!

• Please observe the manufacturer‘s

details on the devices under test!

Fuse Replacement

All fuses for neutral and phase conductors

are accessible from the outside (see section

8.3). The fuses may only be replaced when

the instrument is voltage-free, i.e. the instru-

ment must be disconnected from mains

supply power and may not be connected to

a measuring circuit. The fuse type must

comply with the specifications in the techni-

cal data or the labeling on the instrument

(see section 7).

Opening the Instrument / Repairs

The test adapter 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 test adapter

has been opened by unauthorized person-

nel, no guarantee claims can be honored by

the manufacturer with regard to personal

safety, measuring accuracy, compliance

with applicable safety measures or any con-

sequential damages.

PROFITEST⏐PRCD Safety Precautions

GMC-I Messtechnik GmbH 5

The test adapter may not be used:

• If external damage is apparent, for exam-

ple if parts which conduct dangerous

touch voltage are freely accessible,

if its LEDs are defective (voltage at the

PRCD IN would no longer be indicated in

this case)

• If the seal or sealing lacquer has been

removed as the result of repairs or

manipulation carried out by a non-autho-

rized/certified service provider

• With damaged connection and/or mea-

surement cables, e.g. interrupted insula-

tion or kinked cable

• If it no longer functions flawlessly

• After extraordinary stressing due to transport

In such cases, the test adapter must be

removed from operation and secured

against unintentional use.

2 Applications

Testing of PRCDs with the Test Adapter by

Simulating Faults

The following faults can be simulated with

regard to mains supply power to the PRCD:

• Wire reversals

• Failure of individual conductors

(undervoltage detection)

• Interference voltage on the protective

conductor

a) by connecting the phase conductor

to the protective conductor

(PE-UEXT switch setting) or

b) by touching the “on” key of the

single-phase PRCDs with the probe

The evaluation of the PRCD’s reaction to

each respective fault is strictly visual:

• PRCD active or inactive

(indicator lamp on the PRCD)

• Fault indication by means of LEDs on the

test adapter

Attention!

In any case, comply with the manu-

facturer’s recommendations con-

cerning tests to be conducted in

accordance with DGUV Provision 3.

Testing of PRCDs with the Test Adapter by Simu-

lating Faults and Measuring Protective Conductor

and Insulation Resistance, as well as Tripping

Current and Time to Trip, using the PROFITEST

MXTRA Test Instrument

The following functions are possible after

connecting the PROFITEST MXTRA test instru-

ment to the test adapter:

• There are three preset test sequences:

Single-phase PRCDs:

– PRCD-S: 11 test steps

– PRCD-K: 4 test steps

3-phase PRCDs:

– PRCD-S: 18 test steps

• The test instrument runs through all test

steps semi-automatically:

Single-phase PRCDs: 10 test steps

3-phase PRCDs: 17 test steps

• Each test step is evaluated and

assessed by the user (go/no-go) for later

documentation.

• Measurement of the PRCD’s protective

conductor resistance using the test

instrument’s RLO function. Please note

that the protective conductor measure-

ment is a modified RLO measurement

with ramp sequence for PRCDs, which is

only available with the PROFITEST MXTRA

test instrument.

• Measurement of the PRCD’s insulation

resistance using the test instrument’s

RISO function.

• Tripping test with nominal residual cur-

rent using the test instrument’s IF

function.

• Measurement of time to trip using the

test instrument’s IΔNfunction.

• Varistor test for PRCD-K:

Measurement via ISO ramp

PROFITEST⏐PRCD Applications

6GMC-I Messtechnik GmbH

Simulation of “Interference Voltage in the Protec-

tive Conductor” with Probe

In the case of type S PRCDs (PRCD-S), the

on/off key is made of a conductive material

or coated with conductive plastic so that the

sensor inside the device is capable of

detecting dangerous contact voltage at the

protective conductor terminal of the electri-

cal power connection in the form of a differ-

ence in potential relative to the user’s con-

tacting finger.

During simulation of the “interference voltage

in the protective conductor” fault (tripping

test / potential fault as extended function

test for PRCD-S) by touching the on/off key

of the single-phase PRCD (PRCD-S) with

the probe, a difference in potential between

the contactable sensor surface and the pro-

tective conductor terminal is generated

which causes tripping of the PRCD-S.

The probe socket on the PRCD adapter is

connected to the phase conductor (L) of the

power supply network via a series resistor

(safety impedance) with a value of 1 MΩ

using the test adapter’s earthing contact

plug to this end.

Touch current at the probe socket is limited

by the internal protective circuit to less than

the maximum permissible value of 0.5 mA in

accordance with DIN EN 61010-1.

Execution of this test results in maximum

touch current of:

Measuring Protective Conductor Current

Protective conductor current or bias current

may result in premature tripping of PRCDs.

For this reason, the protective conductor is

led out of the housing as a loop between

surface mount sockets 4 and 6. This makes

it possible to measure any protective con-

ductor current with the help of a current

clamp transformer.

3 Initial Start-Up

See the connections overview on page 2 for

all connection variants.

3.1 Testing the LEDs

Before performing any measurements, the

LEDs should be tested for correct function-

ing.

Single-Phase Mains Connection

➭Insert the earthing contact plug into the

earthing contact mains outlet, remove it,

rotate it 180° and insert it again.

When connected with correct polarity, the

PRCD IN L1 LED must light up, and when

rotated 180° the PRCD IN L1 and PRCD IN PE

LEDs must light up simultaneously.

3-Phase Mains Connection

➭Insert the CEE plug into the CEE outlet.

The PRCD IN L1, L2 and L3 LEDs must light

up. If any of the phase conductors are con-

nected to the neutral conductor, i.e. L1-N,

L2-N or L3-N, N lights up instead Lx. If any

of the phase conductors are connected to

protective earth, i.e. L1-PE, L2-PE or L3-PE,

PE lights up instead of Lx.

3.2 Mains Connection

The test adapter must be connected to the

mains for fault simulation, as well as for indi-

cation by means of the phase LEDs.

➭Connect the test adapter to the mains

via the single or 3-phase mains power

cable. Refer to the characteristic values

on page 14 for nominal mains values.

Attention!

Single-Phase Mains Connection

For correct phase connection, the

earthing contact plug must inserted

into the mains outlet such that only

the PRCD IN L1 LED lights up.

The PRCD IN PE LED lights up as well

in the case of polarity reversal.

IT[A] = UMains (L–PE) [V]

1 MΩ

PROFITEST⏐PRCD Initial Start-Up

GMC-I Messtechnik GmbH 7

3.3 Connecting the PRCD

The respective PRCD must be connected to

the test adapter for all tests.

Connecting a Single-Phase PRCD

➭Insert the earthing contact inlet plug from

the PRCD into the earthing contact out-

let (4) at the test adapter.

➭Insert the earthing contact plug (2) from

the test adapter into the outlet coupling

socket at the PRCD.

Example of a Single-Phase PRCD

Connecting a 3-Phase PRCD

➭Insert the CEE inlet plug from the PRCD

into the CEE outlet (6) at the test

adapter.

➭Insert the CEE plug (1) from the test

adapter into the CEE outlet coupling

socket at the PRCD.

4 Measurements with the

PROFITEST MXTRA

In order to perform protective conductor mea-

surements (Rlo) at

type S PRCDs

with the

PROFITEST

MXTRA

, the test adapter must remain connected

to the mains.

The test adapter can remain connected to the

mains for protective conductor measurements

conducted at PRCDs whose protective conduc-

tor is not switched, as well as for insulation mea-

surements (Rins) with the

PROFITEST MXTRA

4.1 Measuring Protective Conductor

Resistance (Rlo)

As opposed to the usual default setting for

low-resistance measurements, the device

under test does not have to be discon-

nected from all sources of voltage in this

case. Depending on the PRCD, the rotary

selector switches have to be set to the ON

and the 1~ ON or 3~ ON positions, in order to

be able to activate the PRCD and switch the

protective conductor through.

Example of a Single-Phase PRCD

➭Before performing protective conductor

measurements, execute an offset mea-

surement to assure that the test

adapter’s connector contacts are not in-

cluded in the measurement results.

➭Insert the respective test plug into the

appropriate socket at the test adapter to

this end: 2 to 4 or 1 to 6.

➭Start the offset measurement at the

PROFITEST MXTRA.

➭Connect the PRCD as described in sec-

tion 3.3.

➭Connect the PROFITEST MXTRA test instru-

ment to sockets 9 and 10 via the 2-pole

measuring adapter.

PROFITEST⏐PRCD Measurement with the PROFITEST MXTRA

8GMC-I Messtechnik GmbH

➭Activate the PRCD.

➭Perform the measurement as described

in the operating instructions for the

PROFITEST MXTRA

(section 12.2 as of V10).

4.2 Measuring Insulation Resistance (Riso)

Attention!

The right-hand rotary selector switch

must be set to the mains disconnect

position: 1~ OFF or 3~ OFF.

➭In order to perform the insulation mea-

surement (Rins), connect the PROFITEST

MXTRA test instrument, via the measuring

adapter, to socket 9 for the cable at the

mains side and to socket 10 for the

cable at the test object’s outlet side.

Example, Single-Phase PRCD OUT Sockets

➭Connect the PRCD as described in sec-

tion 3.3.

➭Single-phase PRCD: Connect the

PROFITEST MXTRA test instrument, via the

2-pole measuring adapter, to the PRCD IN

/ OUT L1, N and PE sockets, one after the

other.

➭Perform the measurement as described

in section 11 of the operating instruc-

tions for the PROFITEST MXTRA.

➭

3-phase PRCD:

Connect the

PROFITEST

MXTRA

test instrument, via the 2-pole mea-

suring adapter, to the

PRCD IN / OUT

L1, L2,

L3, N and PE sockets, one after the other.

4.3 Tripping Test with Nominal Residual Cur-

rent and Measurement of Time to Trip

Note!

If you operate your test adapter at an

electrical system with a 30 mA breaker,

the mains RCCB may be tripped during

the tripping test (tripping current and

time to trip) instead of the PRCD. In this

case the

MAINS L1

LED goes out.

In order to prevent an upstream RCD (also

non-selevtive RCD) from being tripped and

to ensure that the actual tripping current

and/or the correct time-to-trip are deter-

mined, we recommend the following proce-

dure (except for PRCD-K):

➭Connect the PROFITEST MXTRA test instru-

ment via the 2-pole measuring adapter

with pole (L1) to L1 (PRCD-OUT) and

with pole (PE) to N (PRCD-IN).

Observe the correct polarity between

earthing contact plug and PRCD!

Exception type K PRCDs

➭Connect the PROFITEST MXTRA test instru-

ment via the 2-pole measuring adapter

with pole (L1) to L1 (PRCD-OUT) and

with pole (PE) to PE (PRCD-OUT).

Observe the correct polarity between

earthing contact plug and PRCD!

Optionally you can connect the PROFIT-

EST MXTRA test instrument with the out-

put of the type K PRCD via the PRO-

SCHUKO adapter.

➭Refer to the operating instructions for the

PROFITEST MXTRA regarding performance

of the measurement:

Type K PRCD, section 7.3.2

Type S PRCD, section 7.3.3

PROFITEST⏐PRCD Measurement with the PROFITEST MXTRA

GMC-I Messtechnik GmbH 9

4.4 Varistor Test (PRCD-K)

During this measurement, the voltage is

ascertained at which the varistor becomes

conductive, thus checking the varistor for

correct functioning as well. Measurement

can be performed by means of an ISO ramp,

or with a fixed test voltage of 50 V.

As a prerequisite for this measurement, the

device under test must be switched on.

➭Connect the PROFITEST MXTRA test instru-

ment to the PE IN and PE OUT sockets via

the 2-pole measuring adapter.

➭Perform the measurement as described

in the operating instructions for the PROF-

ITEST MXTRA (section 11).

➭

The evaluation of the measured varistor re-

sistance depends on the manufacturer’s

specifications (PRCD-K from Kopp: e.g. 12

to 22 V according to Kopp).

Note on Kopp Test Specification:

PRCD-K (Varistor in Protective Earth Circuit)

Test Sequence by Kopp:

1.) Connect operating voltage (e. g. 230 V/

50 Hz) and 24 V AC voltage source.

2.) Select resistance (R) depending on the

residual current of the PRCD-K:

For PRCD-K

with In = 30 mA →R = 220 Ω/1 W.

For PRCD-K

with In = 10 mA →R = 620 Ω/0.5 W.

3.) Switch on PRCD-K by pressing the ON

button.

4.) Press key <T> →device must trip →PE

circuit is functioning properly.

The shutdown test of the PRCD-K stipulated

by KOPP at this point is performed in con-

nection with the testing of the RCD protec-

tion device with a continuously rising resid-

ual current until the device is tripped.

5 Protective Conductor Current

Measurement

➭Connect the PRCD as described in sec-

tion 3.3.

➭Switch mains power on by turning the

right-hand rotary selector switch to the

1~ ON or 3~ ON position depending on

the number of phases.

➭Single-phase PRCD: Turn the left-hand ro-

tary selector switch to the first ON posi-

tion in the orange area for single-phase

interruption.

➭3-phase PRCD: Turn th e left-hand rotary se-

lector switch to the first ON position in the

green area for 3-phase interruption.

➭Enclose the external protective conduc-

tor loop (5) with the jaws of the current

clamp transformer.

➭Read the measured value for protective

conductor current at the current clamp

transformer.

Protective conductor current should not

exceed 3.5 mA.

Example of a Single-Phase PRCD

PROFITEST⏐PRCD Measurement with the PROFITEST MXTRA

10 GMC-I Messtechnik GmbH

6 Fault Simulation

Note!

If you operate your test adapter at an

electrical system with a 30 mA

breaker, the mains RCCB may be

tripped during the tripping test (trip-

ping current and time to trip) instead

of the PRCD. In this case the MAINS

L1 LED goes out.

6.1 PRCD-S (single-phase)

➭Switch mains power on by

turning the right-hand rotary

selector switch to the 1~ ON position.

6.1.1 Simulated Interruption

➭Start with the left-hand rotary se-

lector switch in the first ON position in the

orange area for single-phase interrup-

tion.

➭Switch through the positions, one after

the other, in the clockwise direction (ta-

ble from top to bottom).

6.1.2 Simulated Wire Reversal

➭Turn the left-hand rotary selector

switch to the L1-PE position in the orange

area for single-phase wire reversal.

Instead of the

L1 LED

, the

PE LED

must light up.

It must not be possible to activate the PRCD

when this fault is simulated.

6.1.3 Simulation of PE to Phase – PE-UEXT

➭Set the left-hand rotary selector switch

to the PE-UEXT position.

The L1 LED and the PE LED PE light up.

It must not be possible to activate the PRCD

when this fault is simulated.

Step

Rotary

Switch

Test

Adapter

PRCD

Action

LED

1Activate the PRCD.

2The PRCD is

tripped. It must not

be possible to

reactivate it.

3Activate the PRCD.

The PRCD is

tripped. It must not

be possible to

reactivate it.

5Activate the PRCD.

6The PRCD is

tripped. It must not

be possible to

reactivate it.

Step

Rotary

Switch

Test

Adapter

PRCD

Action

LED

It must not be

possible to activate

the PRCD.

Step

Rotary

Switch

Test

Adapter

PRCD

Action

LED

It must not be possi-

ble to activate the

PRCD.

PROFITEST⏐PRCD Fault Simulation

GMC-I Messtechnik GmbH 11

6.1.4 Contacting the “ON” Key at the PRCD

with the Probe (PRCD-S)

➭Turn the left-hand rotary selector switch

to the first ON position in the orange area

for single-phase interruption.

The L1 LED must light up.

➭Activate the PRCD.

➭Plug the probe into the PROBE socket

and contact the ON key at the PRCD with

the test probe.

➭Observe the notes in chapter 2 „Applica-

tions“ and in the subsection entitled Sim-

ulation of “Interference Voltage in the

Protective Conductor” with Probe.

The PRCD is tripped.

It must not be possible to activate the PRCD

as long as the probe is in contact with the

ON key at the PRCD.

➭Step 11: see section entitled “Protective

Conductor Current Measurement” on

page 9.

6.2 PRCD-K (single-phase)

➭Switch mains power on by

turning the right-hand rotary

selector switch to the 1~ ON position.

6.2.1 Simulated Interruption

➭Start with the left-hand rotary se-

lector switch in the first ON position in the

orange area for single-phase interrup-

tion.

➭Switch through the positions, one after

the other, in the clockwise direction (ta-

ble from top to bottom).

Due to its design, the following tests are omitted

for the PRCD-K:

– PE interruption

– Simulated wire reversal

– Simulation of PE to phase

– Contacting the “ON” key at PRCD with

the test probe

Step

Rotary

Switch

Test

Adapter

PRCD

Action

LED

9Activate the PRCD.

Contact “ON” key at PRCD with test probe.

The PRCD is

tripped. It must not

be possible to reac-

tivate it.

Step

Rotary

Switch

Test

Adapter

PRCD

Action

LED

1Activate the PRCD.

2The PRCD is

tripped. It must not

be possible to

reactivate it.

3Activate the PRCD.

The PRCD is

tripped. It must not

be possible to

reactivate it.

PROFITEST⏐PRCD Fault Simulation

12 GMC-I Messtechnik GmbH

6.3 PRCD-S (3-phase)

➭Switch mains power on by

turning the right-hand rotary

selector switch to the 3~ ON position.

6.3.1 Simulated Interruption

➭Start with the left-hand rotary se-

lector switch in the first ON position in the

green area for single-phase interruption.

➭Switch through the positions, one after

the other, in the clockwise direction (ta-

ble from top to bottom).

Conductor Interruption Using a 3-Phase PRCD from Kopp as an Example

Regarding step 8: The N LED also lights up due to star connection, although N is interrupted!

Note!

Tripping performance may deviate

from this example in the case of

PRCDs from other manufacturers –

adhere to the manufacturer’s test

instructions!

Step

Rotary

Switch

Test Adapt er

PRCD

Action

LED

1Activate the PRCD.

2The PRCD is tripped. It must