Page
8
8
P OT
{ ___.
BREAKER
TRANS.
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PTT
1
-,
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\
,/
,_
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TEST
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VOLTMETER
1
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43T
•
MAN
AUTO
CONTROL
SEL ECTOR
SWITCH
-
-
- -
-
-- -----
--
-
-
,
VOLTAGE
S ENSING
EL EMENT
COMPENSATOR
90R
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AUXILIAR Y
REL AYS
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..
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L---------
--- _____
...J
CV R -I REL AY
Fig.
5-
Simplified Control Sche!N!tic with CVR-1 Relay
3. Manually operate the tap changer in
the raise direction until a voltage 2 or 3
volts in excess of the 90L contact settingis
read by means of a voltmeter connected to
test terminals PTT1 and PTT2.
I\
ow cut in resistance on the Test Rheo
stat until the voltage on the test terminals
is at the desired value for the 90R setting.
After 60 seconds set the control selector
switch on "AUTO" and move the 90R sta
tionary contact until it picks up the auxiliary
control relay.
Set control selector to
"MAN".
4. Adjust the Test Rheostat for the de
sired value of the 90L setting and again,
after 60 seconds, set the control selector on
"AUTO". Move the 90L stationary contact
until it picks up the motor control relay.
5. Refer to Time Voltage Curve (Figure
1 0) and set damping magnet for desired time
delay characteristic.
6. Set resistance and reactance com
pensator dials as required. (See Page 14)
7.
Return Test Rheostat knob to the
"OFF" position.
Setting the CVR-1 Relay while Removed
from Flexitest Case
When removed from its case, the type
CVR-1 relay may be checked conveniently
by means of a pair of FlexitestGJplugs, Style
No. 1164046, which may be plugged into the
jacks in top and bottom of the relay chassis.
The circuit may also be made by means of
clip leads connected to corresponding ter
minals on the relay.
Preparatory to making this test, jumper
numbered terminals 5 to 6, 4 to 15,3 to 16,
5 to 18, and
7
to 9 on the CVR-1 chassis.
Apply a variable voltage to points 14 and 9
�orresponding to PTT1 and PTT2 on the con-
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