Gossen MetraWatt 702 - Manual (Page 34)

34 GOSSEN METRAWATT GMBH
11.7 Testing Extension Cables for VDE 0701, Part 1, and VDE 0702
(option: EL1 adapter)
Extension Cables up to 5 m Long
Protective conductor resistance between the earthing contact at the
mains plug and all exposed metal parts may not exceed 0.3
Ω for safety
class I devices. This value may not exceed 1 Ω for permanently
connected data processing systems (DIN VDE 0701, part 240).
Extension and Connector Cables Longer than 5 m
Per DIN VDE 0702, an additional cable resistance of 0.1
Ω, however, not
more than 1 Ω, is allowable as of a length of 5 m for each additional
7.5 m.
Resistance testing for cables longer than 5 m is thus advisable (see also
limit values on page 17).
Note
☞
The EL1 accessory adapter is required for testing for short-
circuiting and interruption of single-phase extension cables.
Connecting the Extension Cable or the Multiple Outlet
Note
☞
The keys in the adapter’s handle have no function.
Performing the Test
➭ Connect the extension cable to the EL1 adapter as shown in the figure
above.
➭ Select the “Ext. Cable” test from the initial menu with the cursor and
acknowledge with the key: Ext. Cable x WITH EL1.
➭ Select “Start Test” with the key.
➭ Start the measurement sequence with the key.
➭ First perform and acknowledge visual inspection of the extension cable.
➭ Enter the length of the cable with the
and keys. Acknowledge with
the key.
PROBE 5 4
(21)
EL1
SECUTEST
Device Under Test =
Extension Cable