Netherlands - grid protection settings according to NEN-EN 50549-1:2019
In the Netherlands, installations up to 1.0 MW are categorized as Type A.
Type A systems - protection settings
For Type A systems, install a grid monitoring relay, for example ABB CM-UFD.M31 or CM-UFD.M31M, and configure it with the protection settings shown below:
| Relay protection setting | Time | Level |
|---|---|---|
|
Overvoltage |
0 s |
1.15 x Un |
|
Overvoltage - step 2 |
10 minutes |
1.1 x Un |
|
Undervoltage - step 1 |
2.0 s |
0.8 x Un |
|
Undervoltage - step 2 |
0.2 s |
0.7 x Un |
|
Overfrequency |
2.0 s |
51.5 Hz |
|
Underfrequency |
2.0 s |
47.5 Hz |
Automatic reconnection settings for type A
Configure the relay to allow automatic reconnection only when the mains frequency has remained within the range of 49.9 Hz to 50.1 Hz for at least 60 seconds.
In addition, automatic reconnection based on voltage is only permitted when the grid voltage has remained within the range of 207 V to 253 V for a continuous period of 60 seconds.
Note:
- For detailed ABB relay-specific configuration, see the section Netherlands type A later in this manual.
- For settings related to Ziehl devices, consult the corresponding device manual.
- For additional configuration and parameter guidelines, refer to the local Dutch grid code or the document Regulering_20_1d4b9b30b6.pdf.