Basler Electric DECS-250N - Manual (Page 77)

9440500990 Rev D 61
DECS-250N Limiters
Figure 47. Takeover OEL Settings
A OEL Enable: Select checkbox to enable OEL.
B OEL Mode: Select Summing Point or Takeover.
C Summing Point OEL Offline Low Level: Adjustable from 0 to 20 Adc. The setting increment is 0.01 Adc.
D Summing Point OEL Offline High Level: Adjustable from 0 to 40 Adc. The setting increment is 0.01 Adc.
E Summing Point OEL Offline High Time: Adjustable from 0 to 10 s in 1 s increments.
F Summing Point OEL Online Low Level: Adjustable from 0 to 20 Adc. The setting increment is 0.01 Adc.
G Summing Point OEL Online Medium Level: Adjustable from 0 to 30 Adc. The setting increment is 0.01
Adc.
H Summing Point OEL Online Medium Time: Adjustable from 0 to 120 s in 1 s increments.
I Summing Point OEL Online High Level: Adjustable from 0 to 40 Adc for the DECS-250. The setting
increment is 0.01 Adc.
J Summing Point OEL Online High Time: Adjustable from 0 to 10 s in 1 s increments.
K dv/dt Enable: Check box to enable OEL voltage dependency.
L dv/dt Level: Adjustable from –10 to 0 in 0.1 increments (per unit).
M Takeover OEL Low Level: Adjustable from 0 to 15 Adc in increments of 0.01 Adc.
N Takeover OEL High Level: Adjustable range varies depending on value of Low Level setting.
O Takeover OEL Time Dial: Adjustable from 0.1 to 20 in increments of 0.1.
P Reset Method: Select Inverse, Integrating, or Instantaneous.
Q Reset Coefficient: Adjustable from 0.01 to 100 in increments of 0.01.
F Takeover OEL curve.
G Curve display selections/legend.
Underexcitation Limiter
BESTCOMSPlus Navigation Path: Settings Explorer, Operating Settings, Limiters, UEL
HMI Navigation Path: Settings, Operating Settings, Limiters, UEL
Operating a generator in an underexcited condition can cause the stator end iron to overheat. Extreme
underexcitation may lead to a loss of synchronism. The underexcitation limiter (UEL) senses the leading
var level of the generator and limits decreases in excitation to limit end-iron heating. When enabled
A , the