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0
9
=
where:
angle I AB leads V A s
=
angle of maximum torque
See Table I I for values of Ts for the various angles of maximum torque.
LOWE R UNIT
This unit is identical to the upper unit except it is polarized to have maximum
torque 180 degrees from the upper unit.
The value Ts is given in Table I I for various an gles of maximum torque.
of Ts is equal to the tap value when the maximum torque angle is set for five degrees.
If only the upper potentiometer (P1 for the upper unit, or P2 for the lower unit) is
adjusted, the value of T R will be as shown in Table I I. The value of Ts can be adjusted
by using the lower potentiometer (P3 for the upper unit, or P4 for the lower unit) ;
however, it may n ot be possible to make Ts equal to the tap value at all angles of
maximum torque settings.
ANGLE OF
MAXIMU M TORQUE
s o
100
150
200
25 °
300
350
TAPPED AUTOTRANSFORMER
The reach in ohms of the angle-impedance may be adjusted by two taps on the
autotransformer.
The tap block and the tap plugs are located on the right side of the
relay. The two tap leads marked #1 control the upper unit, and the two tap leads marked
#2 control the lower unit.
in the upper half of the block (zero to ten percent) .
should be connected to a tap in the lower half of the block (10 to 90 percent) .
restraint tap setting� T R , is the sum of the two tap values into which the #1 or #2 leads
GEK-49778
z = -----'---'---
cos
TABLE I I
STUDS 13-14
STUDS 15-16
Jumper
Jumper
Jumper
Jumper
Jumper
Open
Open
The upper #1 and #2 tap leads should be connected to a tap
'
Therefore, the equation is:
(0-9
+
180)
BASIC REACH OH M S Ts )
0. 5 OHM TAP 1. 5 OH M TAP 3. 0 OHM TAP
0. 48 - 0. 53 1. 43 - 1. 58 2.85 - 3. 15
0. 41 - 0. 47
1. 22 - 1. 40 2. 43 - 2. 79
0. 38 - 0. 42 1. 14 - 1. 26
0. 34 - 0. 38 1. 02 - 1. 13 2. 04 - 2. 25
0. 32 - 0. 36
0. 94 - 1. 07
0. 31 - 0. 37
0. 92 - 1. 11 1. 83 - 2. 22
0. 35 - 0. 40 1. 05 - 1. 20 2. 10 - 2. 40
The lower #1 and #2 tap leads
7
The value
2. 28 - 2. 52
1. 89 - 2. 13
The
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