User manual

18 GMC-I Messtechnik GmbH

5.5.1 Measuring Equivalent Leakage Current

Attention!

Do not touch the instrument’s terminal contacts during equivalent leakage current measurements!

➭ Connect the DUT as shown in the followig picture.

➭ Set the measuring function selector switch to the “I

20 mA” position.

➭ Switch all DUT functions on and make sure, for example, that all contacts for tempera-

ture sensitive switches and the like are closed.

➭ Read the measured value in “mA” from the LCD.

According to DIN VDE 0701-0702, the displayed value for current between components

to which voltage is applied during operation and exposed metal parts may not exceed

3.5 mA, or 1 mA/kW for devices with heating power of greater than 3.5 kW.

5.5.2 Measuring Residual Current

Residual current (differential current) is measured between phase conductor L and neutral

conductor N at the device under test. This measurement may not be performed until the

protective conductor test has been passed (see chapter 5.3, page 14).

➭ Connect the device under test to the mains outlet..

➭ Set the measuring function selector switch to the “I

Diff

20 mA” position.

➭ Start up the device under test.

➭ Read the residual current value in mA from the display. According to

DIN VDE 0701-0702, the displayed current value may not exceed 3.5 mA, or 1 mA/kW

for devices with heating power equal to or greater than 3.5 kW.

Measurements must be performed with the mains plug poled in both directions. The larger of

the two measured values applies.

Note!

If no device under test is connected, random characters appear at the digital display

which may not be construed as measured values.

Note!

If the METRATESTER 5 is integrated into a 3-phase ammeter, residual current is mea-

sured as the sum of instantaneous current in conductors L1, L2, L3 and N.

To test socket

Diff

To test socket