Manual Gossen Metrawatt SECULIFE ST HV (page 46 of 72) (English)

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46 GMC-I Messtechnik GmbH

15.7 Testing Extension Cables for VDE 0701-0702 (VDE 0701 Part 1)

(optional 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 con-

nected data processing systems (DIN VDE 0701, part 240).

Extension and Connector Cables Longer than 5 m

An additional cable resistance of 0.1 Ω, however, not more than 1 Ω, is al-

lowable 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 20.

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

õ Connect the extension cable to the EL1 adapter as shown in the figure

above.

õ Select the “

Ext. Cable

WITH EL1

” test from the initial menu with the cursor

and acknowledge with the key:

õ Select “Start Testing” with the key.

õ Start the test sequence with the key.

First perform and acknowledge visual inspection of the extension cable.

õ Enter the length of the cable with the

and keys. Acknowledge with

the key.

For conductors with a rated current of

> 16 A, the cross section (Diameter)

has to be taken into account during

measurement.

The cross section is only queried if a 3-

phase current adapter has been connec-

ted and the connection parameter has

been set to VL2E or AT3-IIIE. Upon ente-

ring the cross section, the limit value for

the protective conductor resistance is

recalculated.

PROBE 5 4

(21)

EL1

SECUTEST

Device Under Test =

Extension Cable

Test Socket

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Gossen Metrawatt SECULIFE ST HV Manual

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