![](/images/new-backgrounds/1101755/10175577x1.webp)
| Table | |
|
|
|
Overload |
| Threshold for generator overload (in % of Nominal power) |
|
| Step: 1% of Nominal power; Range: 0 − 200% |
|
|
|
Overload Wrn |
| Threshold for generator overload warning (in % of Nominal power) |
|
| Step: 1% of Nominal power; Range: 0 − 200% |
|
|
|
Overload del |
| Delay for generator overload alarm. Step: 0.1s; Range: 0 − 60.0 s |
Ishort |
| Shutdown occurs when short circuit limit Ishort limit is reached. |
|
| Step: 1 % of Nominal current; Range: 100 − 500 % |
|
|
|
2Inom del |
| IDMT curve shape selection. 2Inom del is Reaction time of IDMT |
|
| protection for 200% overcurrent Igen = 2* Nominal current. |
|
| Step: 0,1 s; Range: 0,1 − 20 s |
|
| IDMT is “very inverse” generator over current protection. Reaction time is |
|
| not constant but depends on generator over current level according |
|
| following formula. Reaction time is limited up to 900 sec = 15 minutes. |
|
| IDMT protection is not active for Reaction time values longer than 15 |
|
| minutes. |
|
| 2lnom del * Nomin current |
|
| Reaction Time + lgen * Nomin current |
Curr unbal |
| Threshold for generator current asymmetry (unbalance). |
|
| Step: 1% of Nominal current; Range: 1 − 100% of Nominal current |
|
|
|
Curr unbal del |
| Delay for generator current assymetry. Step: 0.1 s; Range: 0 − 60.0 s |
Gen >V |
| Shutdown level for generator overvoltage. All three phases are checked. |
|
| Maximum out of three is used. |
|
| Step: 1% of Nominal voltage; Range: Gen >V Wrn −200% |
|
|
|
Gen >V Wrn |
| Warning level for generator overvoltage. All three phases are checked. |
|
| Maximum out of three is used. |
|
| Step: 1% of Nominal voltage; Range: Gen <V Wrn − Gen >V |
|
|
|
Gen <V Wrn |
| Warning level for generator under voltage. All three phases are checked. |
|
| Minimum out of three is used. |
|
| Step: 1% of Nominal voltage; Range: Gen <V − Gen >V Wrn |
Gen <V |
| Shutdown level for generator under voltage. All three phases are checked. |
|
| Minimum out of three is used. |
|
| Step: 1% of Nominal voltage; Range: 0% − Gen <V Wrn |
|
|
|
Gen V del |
| Delay for generator under voltage and over voltage alarm |
|
| Step: 0.1s; Range: 0 − 60 s |
|
|
|
Volt unbal |
| Threshold for generator voltage unbalance alarm. |
|
| Step: 1% of Nominal voltage; Range: 0 − 100% of Nominal voltage |
|
|
|
Volt unbal del |
| Delay for generator voltage unbalance alarm. |
|
| Step: 0.1s; Range: 0 − 60.0 s |
|
|
|
Gen >f |
| Shutdown level for generator over frequency. |
|
| Step: 0.1% of Nominal frequency; Range: Gen > Wrn − 200.0% |
|
|
|
Gen >f Wrn |
| Warning level for generator over frequency. |
|
| Step: 0.1% of Nominal frequency; Range: Gen <f Wrn − Gen >V |
|
|
|
Gen <f |
| Shutdown level for generator under frequency. |
|
| Step: 0.1% of Nominal frequency; Range: 0.0 − Gen <f Wrn |
|
|
|
Gen <f Wrn |
| Warning level for generator under frequency. |
|
| Step: 0.1% of Nominal frequency; Range: Gen <f − Gen >f Wrn |
|
|
|
Gen f del |
| Delay for generator under frequency and over frequency alarm. |
|
| Step: 0.1s; Range: 0 − 60.0 s |
MN2417 | Operation |