Insulation Resistance - TESTBOY TV 470 Bedienungsanleitung

Insulation resistance

The insulation resistance should be measured as follows:
Protection class 1
Protection class 2
Protection class 3
In order to ensure that all insulation exposed to the mains is checked
with this measurement, make sure that all switches, temperature
regulator etc. are activated. The measurement voltage is 500 VDC.
Limits
Protection class
class-I
class-II
PC III
Important notes
The equivalent leakage current test should be done even when the ISO
|
test is successful.
Exposed conductive components that are connected to the PE conductor
|
should be tested with the test leads.
Good measurement values can be shown as erroneous ISO measure-
|
ments.
If all safety relevant parts are not reach when doing ISO measurements,
|
a PE conductor current measurement or a touch current measurement
should be made instead of the ISO/EV test. Either the direct method or
the indirect method I can be used. With the indirect method, the DUT
has to be in an isolated position.
®
Testboy TV 470
Information to DIN VDE 0701-0702:2008-06
between L+N against PE
between L+N and against exposed conductive com-
ponents of the device
between the voltage connection and exposed con-
ductive components of the device.
DIN VDE 0701
> 0.3 MΩ Devices with heating elements
> 1 MΩ Devices without heating elements
> 2 MΩ Exposed conductive components without
PE connection
> 2 MΩ
> 250 kΩ
DIN VDE 0702
65