Benning IT 115 - 5.2 Insulating Resistance Measurement

BENNING IT 115 Device description
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5.2 Insulating resistance
The measurement of the insulating resistance is performed in order to prove the proper
condition of the insulation and in order to exclude electrical danger.
Typical applications are the following cases:
 Insulating resistance between the active conductors (L/N) of an installation and the
protective conductor / earth (PE) => protection against electric shock,
 Insulating resistance between the active conductors (L/N) of an installation => protection
against short-circuit (over-current) and guarantee of the functional safety,
 Insulating resistance of non-conductive rooms (walls and floors),
 Insulating resistance of earthing cables and
 Resistance of semiconductive (antistatic) floors.
Key function as described in chapter
4.2 Function selector switch
Figure 5.5:
Insulating resistance
Testing parameters
Uiso
Nominal t
esting voltage
[50 V, 100 V, 250 V, 500 V, 1000 V]
Limiting value
Minimum insulating resistance [without limits (---), 0.01 M

÷ 200 M

]
Connection plan
Figure 5.6: Connection of the three-wire test cable and
the optional "Commander" test probe (044155)