Voltage and frequency monitoring relay
max. 1.13 V, max. 0.5 Hz/s | PMVF10
(e.g. wind turbine or photovoltaic systems, diesel generating set, etc.) is connected in parallel with the electrical grid (local low-voltage utility):
- Limits of minimum and maximum voltage values
- Limits of minimum and maximum frequency values
- Limit of the Rate Of Change Of Frequency (ROCOF).
When at least one of these limits are not respected, abnormal conditions need to be signalled using a contact.
Typically, the contact is used to isolate the independent power source from the electrical grid.