Woodward easYgen-3000XT Series, Руководство пользователя

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Falling below a limit value
• Current in phase L2 = current in phase L3 •
• Current in phase L1 has been undershot
•
• P
A
= tripping value percentage (example 10 %) •
• I
N
= rated current (example 300 A) •
Tripping value for phase L1:
• I
L1
≤ (I
L2
+ I
L3
- 3 * I
N
* P
A
) / 2 •
= (300 A + 300 A - 3 * 300 A * 10%) / 2
= (300 A + 300 A - (3 * 300 A * 10) / 100)) / 2
= 255 A
ID Parameter CL Setting range
[Default]
Description
2400
2406
Monitoring 2 [On] Unbalanced load monitoring is
carried out according to the
following parameters. 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.
2404
2410
Limit 2 0.0 to 100.0%
2404: [10.0%]
2410: [15.0%]
(Hysteresis: 0.5%)
(Reset Delay: 80 ms)
The percentage values that are to
be monitored for each threshold
limit are defined here.
If this value is reached or
exceeded for at least the delay
time without interruption, the
action specified by the alarm class
is initiated.
Notes
This value refers to the "Generator
rated current" (parameter
╚═▷
1754 )
2405
2411
Delay 2 0.02 to 99.99 s
2405: [5.00 s]
2411: [1.00 s]
If the monitored current exceeds
the threshold value for the delay
time configured here, an alarm
will be issued.
Notes
If the monitored current falls
below the threshold (minus the
hysteresis) before the delay
expires the time will be reset.
2401
2407
Alarm class 2 Class A, Class B, Class C, Class D,
Class E, Class F , Control
2401: [Class B]
Each limit may be assigned an
independent alarm class that
specifies what action should be
taken when the limit is surpassed.
448 easYgen-3000XT Series B37574
4 Configuration
4.5.1.5.4 Generator Unbalanced Load (Level 1 & 2) ANSI# 46
Released