ABB REG316 4 Series Operating Instructions Manual page 205

REG 316*4 1MRB520049-Uen / Rev. F
Angle
Characteristic angle between voltage and current for maxi-
mum sensitivity.
0° = active power measurement
90° = reactive power measurement (inductive),
Settings between these limits are possible, e.g. for directional
measurements at locations on the power system.
The correction of phase errors caused by the input circuit is
also possible.
Drop-Ratio
Reset value in relation to the pick-up value. Thus depending
on the sign of the pick-up value, the setting of the reset ratio
must be greater or less than 100 %.
Forbidden settings:
· Reset ratios
· Reset ratios
· Reset ratios
· Reset ratios
A large hysteresis must be selected for low pick-up settings
and a small one for high pick-up settings
Forbidden settings for hysteresis (= ½ 100% - reset ratio ½ )
settings:
(
£
0 5% . P Setting -
·
³ 10% P Setting
-
·
These conditions are fulfilled by setting, for example,
·
P - Setting
£
for 0 2 ,
and
P
£
for 0 005 .
Delay
Time between the function picking up and tripping. The time
the function takes to reset is also influenced by the delay set
for operation, i.e.:
for t > 100 ms, the function resets after 50 ms, otherwise re-
setting is instantaneous.
>100 % for MAX
<100 % for MAX
<100 % for MIN
>100 % for MIN
)
+
P 0 01 .
N
P
N
£
1 :
P
N
- Setting
£
0 2 . :
P
N
ABB Switzerland Ltd
and P-Setting >0
and P-Setting <0
and P-Setting >0
and P-Setting <0.
(see Fig. 3.5.15.1).
95%
60%.
3-167