Manual Gossen Metrawatt Profitest Intro (page 18 of 62) (English)

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18 GMC-I Messtechnik GmbH

Test Standard

The following must be substantiated per

DIN VDE 0100-600:2008:

– Touch voltage occurring at nominal residual current may not

exceed the maximum allowable value for the system.

– Tripping of the RCCB must occur within 400 ms (1000 ms for

selective RCDs) at nominal residual current.

Important Notes

•The PROFITEST INTRO permits simple measurements at all

types of RCDs. Select RCD, SRCD, PRCD etc.

• Measurement must be executed at one point only per RCD

(RCCB) within the connected electrical circuits. Low-resis-

tance continuity must be substantiated for the protective con-

ductor at all other connections within the electrical circuit (RLO

or UB).

• The measuring instruments often display 0.1 V touch voltage

in TN systems due to low protective conductor resistance.

• Be aware of any bias currents within the system. These may

cause tripping of the RCDs during measurement of touch volt-

age UB, or may result in erroneous displays for measurements

with rising current: Display = IF

- Ibias_current

• Selective RCDs identified with an can be used as the sole

means of protection for automatic shutdown if they adhere to

the same shutdown conditions as non-selective RCDs (i.e.

ta< 400 ms). This can be substantiated by measuring break-

ing time.

• Type B RCDs may not be connected in series with type A or F

RCDs.

Note

Bias Magnetization

Suppression of RCD tripping by means of bias magneti-

zation with direct current is only possible via a country-

specific measuring adapter, e.g. PRO-Schuko measuring

adapter (Z503K) or the KS-PROFITEST INTRO (Z503L) for

3-pole measurement.

7.1 Measuring Touch Voltage (with reference to nominal resid-

ual current) with 1/3 Nominal Residual Current and Tripping

Test with Nominal Residual Current

Select the Measuring Function

Connection

Setting Parameters for IΔN

IΔN

Nom. res. current:

10 ... 500 mA

Type 1:

RCD, SRCD, PRCD etc.

Nominal current: 6 ... 125 A

Type 2: AC , A/F ,

B/B+ *, EV/MI

* Type B/B+/EV/

AC/DC sensitive

Phase displacement: 0°/180°

X times tripping current

Negative/positive half-wave

Positive direct current

1, 2, 5 (IΔN max. 300 mA)

Waveform:

Touch voltage:

Time to trip:

< 25 V, < 50 V, < 65 V

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Gossen Metrawatt Profitest Intro Manual

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