Measuring The Insulation Resistance - KSB UPA Installation & Operating Manual

13 The measured value must be steady. A longer measurement period might be needed for larger cable cross-
sections.
14 The insulation resistance depends on the cable type and cable length.
5 Installation at Site

5.2.8 Measuring the insulation resistance

DANGER
Hazardous voltage during and after measurement
Danger of death from electric shock!
▷ Do not touch the contact points during and immediately after measurement.
▷ Insulation resistance measurement must be effected by a trained electrician
only.
1. Measure the insulation resistance prior to installation and prior to connection to
the power supply.
2. Insulation resistance measurement must be effected by a trained electrician only.
3. Prior to the measurement, ensure compliance with the operating manual of the
insulation resistance measuring device.
ü An insulation resistance measuring device with a measuring voltage of 1000 V DC
is available.
ü The contact points are clean and dry.
1. Measurement period: 1 minute
2. Recommendation: insulation resistance at 20 °C - 30 °C: > 200 MOhm
Rinsul
(MΩ)
U V W
M 3~
Fig. 8: Insulation resistance measurement, 1 power cable
Risol
(MΩ)
U1 V1 W1
U2 V2 W2
M 3~
Fig. 9: Insulation resistance measurement, 2 power cables (open)
UPA / UPA S
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