Page 10
90R CONTACT
ASSEM. HANDLE
90 R CONTACT ASSEM.
MAGNET TIME
MULTIPLIER SCALE
MAGNET ASSEM.
MOUNTING SCREWS
90 L CONTACT
ASSEM. HANDLE
VOLTAGE SCALE
DAMPING MAGNET
a
SCALE
KEEPER
LOCKI NG
SCREW
DAMPING
MAGNET
FLEXIT EST
SWITCH
BASE
Fig.
7-
Close-up of CVR-1 Relay Adjustments
while lights Ro and Lo indicate operation of
the motor control relay contactsAR andAL.
With the switch in the " CAL" position,
the operation of 90R and 90L contacts is
indicated by lights Rp and Lp.
With the switch on "AUTO" position the
relay functions in response to applied volt
age as it would under fully automatic regu
lation. Operations are indicated by all four
lights.
With the switch on " MAN" position the
raise and lower switches control the motor
control relays.
Rp and Lp now indicate
closing of the raise and lower pushbuttons.
Ro and Lo still indicate operation of AR and
AL contacts.
General operating data for the relay on
60 cycles is as follows:
Burden of the potential
circuit at 120 volts - -
-
- - - - - lOVA
with auxiliary relays energized 3
9V
A
Separate R and
X
compensation
-
24 volts
100% load compensation current
-
.2 amps
Burden on the current circuit at 100%
load - - - - - - - - - - - - - - -
13
VA
Time Delay Adjustment
The inverse time delay characteristic of the
CVR-1 relay enables it to maintain regulated
voltage within close tolerance.
Figure
7
shows the relay adjusted for a damping
factor of 2.4.
Figure 9 shows a curve of
relay adjustment versus damping factors
and Figure 10 shows a curve of relay per
formance when adjusted for a damping factor
of one. As can be seen from Figure 10, at
least three different factors control the
amount of time delay that precedes the ini
tial operation of the tap changer on a change
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