Gossen Metrawatt PROFITEST PRCD M512R handleiding

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Gossen Metrawatt

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Handleiding

6 GMC-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.

[A] =

Mains (L–PE)

[V]

1 MΩ

PROFITEST⏐PRCD Initial Start-Up

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