User Manual

ManualsBrandsGossen Metrawatt ManualsTest EquipmentGossen Metrawatt M535C Electrical tester set Calibrated to DAkkS standards

28 GMC-I Messtechnik GmbH

8.1.1 Measurement with Positive Half-Waves

(only MTECH+/MXTRA/SECULIFE IP)

Measurement by means of half-waves plus direct current makes it

possible to measure loop impedance in systems which are

equipped with RCCBs.

For DC measurement with half-waves you can choose between

two alternatives:

DC-L: lower premagnetization current allowing for faster mea-

surement

DC-H: higher premagnetization current, therefore higher protec-

tion against tripping of RCD

Select Measuring Function

Set Parameters

* Parameters used for report generation only which do not influence the measurement

Sine (full wave) Setting for electric circuits without RCD

15 mA sinusoidal Setting only for motor protection switch

with low nominal current

DC+half-wave Setting for electric circuits with RCD

Start Measurement

Semiautomatic

Measurement

8.2 Evaluation of Measured Values

The maximum allowable

loop impedance Z

L-PE

which may be displayed

after allowance has

been made for maxi-

mum operating mea-

surement error (under

normal measuring con-

ditions) can be deter-

mined with the help of

Table 1 on page 92.

Intermediate values can

be interpolated.

The maximum allowable

nominal current for the

protective device (fuse

or circuit breaker) for a line voltage of 230 V after allowance has

been made for maximum measuring error can be determined with

the help of Table 6 on page 93 based upon measured short-cir-

cuit current (corresponds to DIN VDE 0100 Part 600).

Special Case: Suppressing Display of the Limit Value

The limit value cannot be

ascertained. The inspec-

tor is prompted to evalu-

ate the measured val-

ues himself, and to

acknowledge or reject

them with the help of the

softkeys.

Measurement passed:

key

✔

Measurement failed:

X key

The measured value can

only be saved after it has

been evaluated.

L-PE

Tripping characteristics:

Diameter*: 1.5 to 70 sq. mm

Cable types*: NY...- H07...

Number of wires*: 2 to 10-strand

Nominal current:

2 ... 160 A, 9999 A

A, B/L, C/G, D, E, H, K, GL/GG & Factor

Sine

15 mA sinusoidal

Waveform:

DC-L offset and positive half-wave

Contact voltage:

DC-H offset and positive half-wave

2-pole

Measurement with country-specific

plug insert (e.g. Schuko)

Note

Selecting test probe and Lx-PE

reference or AUTO is only relevant for

report generation.

Semiautomatic measurement