Volts - Westinghouse CVE Instructions Manual

TY P E CV E AN D C V E -. 1 R E L AYS
3
�
P H A S E
2
1 2 0 V O LT S
I 3
obtain this condition. The relay is now calibrated
for a 20 degree circle .
6. Time Curve - Install the p ermanent magnet o n the
relay. Adj ust the p ermanent m agnet k eep er until the
20 ±
op erating time of the relay from the number 1 1 time
dial po sition is 0 . 6 seconds with V
to rated voltage at zero p hase an gle .
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 20 degrees is desired,
adjust the left hand resistor to obtain the desired
circle. For example , if a 40 degree circle is desired,
adjust the left hand resistor until the contacts j ust
close with v 1 and V 2 e qual to rated voltage at
e rees phase angle. It may
d g
the right-hand resistor to position the desired circle
symmetrically about the zero degree line. See "Cen­
tering Circle" above for procedure .
operation will b e as shown in the tim e 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
With i n Fi g . 1 2 equal to rated voltage the
following approximate
ed across the coils of the 1 20 volt relay. Relay set
for 20 degree circ le .
t -
ADJUST TO G IV E F U L L LOAD
O N P H A S E A N G L E
D. P. S.T.
SWI T C H
230
V A R I A B L E

VOLTS

Fig. 12 Dia gram of CVE Test Conn ectio n s.
1
and V 2 e qu al
necessary to readjust
be
The time
voltages should be obtain­
M E T E R
PHASE
A N G L E
M E T E R
; - 0--0 - 0 _ 0 _ _ _ _ _ _ - -
Operating Electromagnet
Restraint Electromagnet
With 120 volts applied to v
Operating Electromagnet
Restraint Electromagnet
40
Approximate d : c . resistances of the coils are a s fol­
of
lows:
Operating Electromagnet
Restraint Electromagnet
C V E R E L AY ( F R O N T V I E W )
C V E
-
:
Upper terminals 59 volts
Lower terminals
57
Lag coil circuit
22
Upper terminals
58
Lower terminals
54
circuit only
2
Upper terminals
5 7
Lower terminals
59
Lag coil circuit
2 2
Upper terminals
54
Lower terminals
58
Upper terminals 59 ohms
Lower terminals 80 ohms
Lag coil - open circuit - 245 ohms
Upper terminals 66 ohms
Lower terminals 92 ohms
1 85A001
9