Operation Manual

GMC-I Messtechnik GmbH 17

INS

Insulation Resistance

PC1 Connection PC2 ConnectionI

Sequence

Protection class I devices

: The protective conductor test must already

have been passed as a prerequisite for the insulation resistance test.

Ð Select the test: ↑↓ keys.

Ð Select the protection class and the type of connection:

PC1 / PC2 / FIX. key.

Connect the DUT to the test socket, and connect the probe if necessary.

Note



All switches at the device under test must be set to the on posi-

tion during measurement of insulation resistance, including

temperature controlled switches and temperature regulators as

well. Measurement must be performed in all program steps for

devices equipped with program controllers.

Ð Start the test: Press the START⏐STOP key.

Attention!

Testing is conducted with up to 500 V. Current limiting is uti-

lized (I < 10 mA), but if the terminals (L and N) are touched,

electrical shock may occur which could result in conse-

quential accidents.

Note: Open-circuit voltage is always greater than nominal voltage.

Ð PC2 connection: Contact exposed conductive parts with the

probe during measurement.

Ð All measured values are displayed.

Ð End the test: Press the START⏐STOP key.

Ð Read the measured value and compare it with the table of

permissible limit values.

Examples of Minimum Permissible Limit Values for Insulation Resistance

Permanent connection

Test

Standard

Test Volt a ge

ISO

PC I PC II PC III Heat

IEC 62353

(VDE 0751-1)

500 V

2MΩ 7MΩ

70 MΩ 70 MΩ

VDE0701-0702

1MΩ 2MΩ 0.25 MΩ 0.3 MΩ