Danfoss EC-C1700B-420 User Manual page 31

User Guide
EC-C1700B-420
Installation
© Danfoss | June 2023
The insulation resistance is measured between terminals and the converter enclosure. When measuring
the main circuit, the auxiliary circuits are grounded. When measuring the auxiliary circuits, the main
circuit is grounded.
Main circuit
Test voltage
500 V
DC
Measurement procedure:
1. Connect main circuits DC+, DC-, L1, L2 and L3 together.
2. Connect all pins of X1 connector to the converter enclosure.
3. Connect the measurement devices ground cable to the converter enclosure.
4. Connect the measurement probe to the main circuits.
Main circuit measurement
Auxiliary circuits
Test voltage
50 V
DC
Measurement procedure:
1. Connect main circuits DC+, DC-, L1, L2 and L3 to the converter enclosure.
2. Connect all pins of X1 connector together, except pin 35 (enclosure ground).
3. Connect the measurement devices ground cable to the converter enclosure.
4. Connect the measurement probe to the connector X1 pins 1 - 34.
Test duration
60 s
Test duration
60 s
Pass criteria
> 100 MΩ
Pass criteria
> 10 MΩ
BC454142332191en-000101 | 31