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TY P E CV E AN D CV E-.1 R E L AYS
3
�
P H A S E
1 20 VOLTS
I
2
3
obtain this condition. The relay is now calibrated
for a 2 0 degree circl e .
6. Time curve - Install the p ermanent magnet on the
relay. Adj ust the p ermanent m agnet k e ep er until the
20
op erating time of the relay from the number
dial po sition is
± 0 . 6 seconds with V
to rated voltage at zero p hase angle .
7 .
Circles other than 2 0 degrees - This adjustment
20 degree circle have been completed.
should not be done until the above adjustments for a
If another circle other than
adjust
the left hand resistor to obtain the de sired
circle. For exampl e , if a 40 degree circle is desired,
with v1 and V 2 e qual to rated voltage at 40
adjust the left hand resistor until the contacts just
close
degrees phase angle. It may be necessary to readjust
the right-hand resistor to position the desired c ircle
symmetrically about the zero degree line. See "Cen
tering
Circle "
above
for procedure ,
operation will be as shown in the time curves of Fig.
9 .
E L E C T R I C A L C H E C K P O I N T S
v1
in Fig. 1 2 equal to rated voltage the
With
following
approximate
voltages
ed across the coils of the 120 volt relay. Relay set
for 20 degree circ le .
t
-
ADJUST
TO GIVE F U L L LOAD
O N
P H A S E
A N G L E
M E T E R
T I M E R
D. P. S.T.
SWI T C H
VA R I A B L E
2 3 0 VOLTS
Fig. 12 Diagram of C V E Test Con n ections.
1 1
time
and
V 2 e qu al
1
20
d e grees is desired,
The time of
be obtain
should
C V E R E L A Y ( F R O N T VIE W )
C V E
PHASE
A N G L E
M E T E R
Operating Electromagnet
Upper terminals
Lower terminals
Lag coil circuit
Restraint Electromagnet
Upper terminals
Lower terminals
With 120 volts applied to v
Operating Electromagnet
Upper terminals
Lower terminals
Lag coil circuit
Restraint Electromagnet
Upper terminals
Lower terminals
Approximate d.-e. resistances of the coils are a s fol
lows:
Operating Electromagnet
Upper terminals 59 ohms
Lower terminals 80 ohms
Lag coil - open circuit - 245 ohms
Restraint Electromagnet
Upper terminals 66 ohms
Lower terminals 92 ohms
185A001
59 volts
57
22
58
54
circuit only
2
57
59
22
54
58
9
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