Manual ground-fault location can be implemented to meet the following requirements:
- In addition to permanently installed EDS systems, a portable ground-fault evaluator is used for ground-fault location in secondary outgoing circuits.
- If the installation does not have an ground-fault test device, a portable ground-fault test device is used.
- If the IT system has been de-energized, a portable ground-fault test device with built-in measuring voltage source is used.
The essential difference in the two applications is in the significantly reduced test current for application in control circuits and/or the response sensitivity.