Merlin Gerin Varlogic NR12 User Manual

26
USER´S MANUAL
6.2 Manual calculation of response value
Normally the response value, more generally known as the C/K value, is set automatically as
a part of the Auto Setup sequence, but there are cases when these values must be entered
manually. The correct value can be calculated using an equation requiring the 1
st
step size
(in vars), line-to-line voltage of the network used (in volts) and the CT ratio as follows
where Q
1st
= size of 1
st
step in vars
U
LL
= line-to-line voltage in volts
I
1
/5A = CT ratio
Alternatively, the C/K value can be taken from the table below (valid for 400 V networks)
Table 1: C/K-values for 400 V network
By successive connections (or disconnections) of steps we adjust the reactive power between
two symmetrical limits corresponding to response value
n
1
/n
2
Smallest step (kvar)
12,5 20 25 30 40 50 60 100
100/5 0,91 1,44
150/5 0,60 0,96 1,20 1,44
200/5 0,45 0,72 0,90 1,08 1,44
250/5 0,36 0,58 0,72 0,87 1,16 1,44
300/5 0,30 0,48 0,60 0,72 0,96 1,20 1,44
400/5 0,36 0,45 0,54 0,72 0,90 1,08
500/5 0,29 0,36 0,43 0,58 0,72 0,87 1,44
600/5 0,30 0,36 0,4 0,60 0,72 1,20
800/5 0,27 0,36 0,45 0,54 0,90
1000/5 0,29 0,36 0,43 0,72
1500/5 0,24 0,29 0,48
2000/5 0,22 0,36
2500/5 0,29
3000/5 0,24
35
/
1
1
××
=
LL
st
UAI
Q
KC

Merlin Gerin Varlogic NR12 Specifications

General

Brand	Merlin Gerin
Model	Varlogic NR12
Category	Controller
Language	English