Benning 044159, Operating Manual

Page: 13 / 16

BENNING MA 3 measuring adapter
10
6.2.2. RInsu – Insulating resistance
Before testing
Switch the rotary switch of
the BENNING MA 3 to the
locking position “L1-L2-L3”.
Test procedure VDE 0701-0702
Class I; RInsu
Cable test

Connect both cable connections to the corresponding
CEE connectors of the BENNING MA 3 .

Start the RInsu measurement on your appliance
tester.
Insulation faults
In case of an insulation fault, i. e. if the value
falls below the admissible insulation re-
sistance, you can determine the external con-
ductor at which the insulation fault occurs by
changing the position of the rotary switch.

To do this, successively turn the rotary switch to the po-
sitions “ L1 ”, “ L2 ” and “ L3 ” while observing the RInsu
values displayed on the appliance tester.
1. If the measured insulating resistance is within the ad-
missible limits, the selected external conductor is not
defective.
2. If the measured insulating resistance is outside the ad-
missible limits, the selected external conductor or the
neutral conductor is defective.
3. If a fault occurs in every locking position of the rotary
switch, the neutral conductor is affected.
Application
Class I; RInsu; LN to PE
Cable test
Connection diagram
Circuit diagram
6.2.3. Functional test and phase sequence test of
cables
Before testing
The functional test and phase sequence test of cables can
be applied to CEE connecting cables and extension ca-
bles.
The BENNING MA 3 measuring adapter is
supplied with mains voltage.
The functional test and phase sequence test of
cables may only be carried out after the RPE
and RInsu tests have been passed.
For single-phase connecting cables or exten-
sion cables (CEE
socket , 3-pin), the rotary
switch must be set to the locking position “L1“
or “L1-L2-L3“.
Test procedure
Class I; functional test and phase sequence test of
cables
Cable test
Switch the rotary switch of
the BENNING MA 3 to the
locking position “L1-L2-L3”.

Connect both cable connections to the corresponding
CEE sockets of the BENNING MA 3 .

Switch the mains voltage to the test socket of the appli-
ance tester.

Observe the status LED display of the corresponding
CEE socket
.

Compare the displayed LED status with the function
table in chapter 8 .

Successively turn the rotary switch to the positions
“L1”, “L2” and “L3”.

Compare the respectively displayed LED status with
the function table in chapter 8 .
The LED display must show the status “pass” in any rotary
switch position.