13.2.29. isolation_monitor

This interface defines an isolation monitoring device (IMD) according to IEC 61557-8 for DC charging. This is used to verify isolation of the DC lines before starting high voltage charging and during charging.

13.2.29.1. Variables

isolation_measurement:object (isolation_monitor-IsolationMeasurement)

Isolation monitoring measurement results

There is an extended definition for this object here.

self_test_result:boolean

Indicates the self test is done and publishes the result. Set “true” for success, “false” for failure.

13.2.29.2. Commands

start:void

Start recurring isolation measurements. The device should monitor the isolation status until stopped and publish the resistance data in regular intervals. The actual interval is device dependent.

stop:void

Stop recurring measurements. The device should stop to monitor the isolation resistance and stop publishing the data.

start_self_test:void

Start self test. This will be done during the CableCheck phase, so a DC voltage will be present according to IEC 61851-23 (2023). The command should return immediately. The “self_test_result” variable must be published once the self testing is done. Note that on many hardware devices this can take a long time (e.g. 20 seconds).

test_voltage_V:number <required>

Specifies the test voltage [V] that is applied on the DC pins during self test. This can be used to verify the internal voltage measurement of the IMD.