IM3G-VX
Doc. N° MO-0068-ING
Rev.
1
Pag.
9
of
36
Copyright 2010 - Microener
F2 46
: Unbalance Alarm
- Alarm level :
2Is
= (0.03-1)Ib, step 0.01Ib
- Setting
2Is
= Dis blocks funct
ion’s operation
- Independent trip time delay :
t2Is
= (1-100)s, step 1s
2.3.6 - F32 - Reverse active power
- Active current (I cos
) setting range :
Ir
= (0.02-0.2)Ib, step 0.01Ib
Setting
Ir
= Dis blocks function’s operation
- Operation level : Ic cos (
c-180°)
[Ir]
- Independent trip time delay :
tIr
= (0.1-60)s, step 0.1s
- Operation zone : 90°<
c<270°
2.3.7 - F37 - Underpower W<
The element measures the 3-phase active power and trips when the power generated (forward)
drops below the set level [W<]
- Pick-up (operation) level : W
<
= (0.05-1.00)Wb, step 0.05Wb
Setting
W<
= Dis blocks function’s operation
- Independent trip time delay :
tW<
= (0.1-60)s, step 0.1s
2.3.8 - F40 - Loss of excitation : capacitive underimpedance Zc<
- For each phase the relay computes the impedance
Zc
E
I cos(
90 )
x
x
x
x
- Characteristics angle of the impedance
Z
= 270°
N.B.
By definition the relation between current displacement
and impedance displacement
is :
= 360°-
Angles are counted anticlockwise from 0° (real axis = direction of phase-to-neutral voltage E)
through 360°.
For example : the displacement of a totally capacitive current is
= 90°;the angle of a totally
capacitive impedance is
= 270°.
- Operation zone is that included in the circle having (see figure) :
Center on the axle displaced by
Z
at distance
from the axles’ origin and
Diameter = K1
2
K1
K2
Содержание IM3G-VX
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