Woodward easYgen-2000 Series User Manual page 121

Examples
Exceeding a limit value
Faling below a limit value
ID Parameter
2400 Monitoring
2406
2404 Limit
2410
2405 Delay
2411
2401 Alarm class
2407
37535B
Configure Monitoring > Generator > Generator Unbalanced Load ...
Current in phase L1 = current in phase L3
n
Current in phase L2 has been exceeded
n
P = tripping value percentage (example 10 %)
n
A
I = rated current (example 300 A)
n
N
Tripping value for phase L2:
I ≥ (3 * I
n
L2
= (3 * 300 A * 10 % + 300 A + 300 A) / 2
= ((3 * 300 A * 10) / 100 + 300 A + 300 A) / 2
= 345 A
Current in phase L2 = current in phase L3
n
Current in phase L1 has been undershot
n
P = tripping value percentage (example 10 %)
n
A
I = rated current (example 300 A)
n
N
Tripping value for phase L1:
I ≤ (I
n
L1
= (300 A + 300 A - 3 * 300 A * 10 %) / 2
= (300 A + 300 A - (3 * 300 A * 10) / 100)) / 2
= 255 A
CL Setting range Description
[Default]
2 [On] Unbalanced load monitoring is carried out according to the following parame‐
ters. Monitoring is performed at two levels.
Both values may be configured independent from each other (condition:
Level 1 < Level 2).
Off No monitoring is carried out for either Level 1 limit or Level 2 limit.
2 0.0 to 100.0 % The percentage values that are to be monitored for each threshold limit are
defined here.
2404: [10.0 %]
If this value is reached or exceeded for at least the delay time without inter‐
2410: [15.0 %]
ruption, the action specified by the alarm class is initiated.
Notes
This value refers to the "Generator rated current" (parameter
2 0.02 to 99.99 s If the monitored current exceeds the threshold value for the delay time config‐
ured here, an alarm will be issued.
2405: [10.00 s]
2411: [1.00 s]
Notes
If the monitored current falls below the threshold (minus the hysteresis)
before the delay expires the time will be reset.
2 Class A/B/C/D/ Each limit may be assigned an independent alarm class that specifies what
E/F action should be taken when the limit is surpassed.
2401: [B]
2407: [E]
easYgen-2200/2500 | Genset Control
* P + I + I ) / 2
N A L1 L3
+ I - 3 * I * P ) / 2
L2 L3 N A
Configuration
1754 Ä p. 95)
121