4–4
M-2601/02/03 Instruction Book
N
O
I
T
C
N
U
F
E
G
N
A
R
T
N
I
O
P
T
E
S
T
N
E
M
E
R
C
N
I
L
A
I
T
I
N
I
G
N
I
T
T
E
S
r
e
t
n
e
c
d
n
a
B
V
0
.
5
3
1
o
t
0
.
0
9
V
1
.
0
V
0
.
0
2
1
F
Q
R
V
V
0
.
2
o
t
4
.
0
V
1
.
0
V
6
.
0
e
c
n
a
t
s
i
s
e
R
C
D
L
V
4
2
+
o
t
4
2
-
V
1
V
0
e
c
n
a
t
c
a
e
R
C
D
L
V
4
2
+
o
t
4
2
-
V
1
V
0
Table 4-1
Level 1 Password Adjustable Parameters
If the CT and VT phasing corrections have been
made, only positive values of R and X
compensation need to be used.
Table 4-2, Approximate Ratio of Line Reactance
to Resistance (X/R) of Typical Distribution Circuits,
gives the X/R ratio for various wire sizes.
By knowing the ratio of the maximum expected
load to the present load, the amount of voltage
compensation needed is found as shown in the
following example.
Example:
Desired:
local voltage @ min load=120 volts
local voltage @ max load=124 volts
Using the following assumptions:
Desired Bandcenter = 120 volts
Desired Bandwidth = 1 volt
The device being controlled is 50%
loaded
Setting
Start with R=0 and X=0, and increase both values
using the ratio shown in the table for the feeder
conductor. Keeping the X/R ratio, increase R
set
and X
set
until tapchanger raises the voltage by
two volts (50% of the desired voltage rise at full
load).
With this simplified method of LDC setting, the
first customer’s voltage will be limited by the upper
voltage limit at the highest daily load, depending
on the accuracy of the daily load projection. At
the same time, the furthest customer will receive
the highest voltage possible under the line and
loading conditions. The first customer protection
can be set on the control. Refer to Section 4.3,
Regulation Limits.
R
S
C
A
R
E
P
P
O
C
M
C
M
R
/
X
M
C
M
R
/
X
5
9
7
0
.
4
0
5
7
0
.
6
7
7
4
5
.
2
0
0
5
5
.
4
6
3
3
0
.
2
0
5
3
3
.
3
6
6
2
5
.
1
0
5
2
4
.
2
G
W
A
R
/
X
G
W
A
R
/
X
0
/
4
2
.
1
0
/
4
0
.
2
0
/
2
0
.
1
0
/
2
5
.
1
2
5
.
0
2
7
.
0
6
2
.
0
6
3
.
0
Table 4-2
Approximate Ratio of Line
Reactance to Resistance
(X/R) of Typical
Distribution Circuits
Summary of Contents for M-2601
Page 1: ...Instruction Book M 2601 02 03 Autodaptive Regulator Control ...
Page 21: ...This Page Left Intentionally Blank ...
Page 47: ...5 2 M 2601 02 03 Instruction Book This Page Intentionally Left Blank ...
Page 65: ...1 3 A B C 7 14 M 2601 02 03 Instruction Book This Page Left Intentionally Blank ...
Page 67: ...M 2601 02 03 Instruction Book A 2 This Page Left Intentionally Blank ...
