This article describes instructions for measuring the insulation resistance of the Editron EC-C1200 inverter.
Insulation resistance testers generate lethal voltages. Only qualified personnel should perform insulation resistance measurements. | |
Before performing the insulation resistance measurement, disconnect all cables and connectors from the device under test. |
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
Following table lists test conditions and pass criteria for EC-C1200-450-L and EC-C1200-450-S inverters.
Test voltage |
Test duration |
Pass criteria for "-L" |
Pass criteria for "-S" |
500 VDC |
60 s |
>100 MΩ |
>5 MΩ |
Connect main circuits DC+, DC-, L1, L2 and L3 together.
Connect all pins of X1 connector to the converter enclosure.
Connect the measurement devices ground cable to the converter enclosure.
Connect the measurement probe to the main circuits.
Figure 1. Main circuit measurement.
Auxiliary circuits
Test voltage |
Test duration |
Pass criteria for all models |
50 VDC |
60 s |
>10 MΩ |
Connect main circuits DC+, DC-, L1, L2 and L3 to the converter enclosure.
Connect all pins of X1 connector together, except pin 35 (enclosure ground).
Connect the measurement devices ground cable to the converter enclosure.
Connect the measurement probe to the connector X1 pins 1 - 34.