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T Y P E C V E A N D C V E - 1 R E LAYS
the
right hand plug all the way i n , adjust the l eft
hand plug such that th e disc does not move from the
number
1 1
time dial position. This can be determined
by no movement of the disc when the time dial is
moved beyond the number
3. Centering Circle - To center the circl e , s et
the right hand resistor ( front view) between on e-third
to one-half of its adj ustment. This will set the center
of the circle within two d e grees o f zero.
4 .
Sprin g Adjustment - Adjust the l eft hand re
sistor ( front view) s uch that th e moving contact just
leaves the backstop of the time dial at the number 1 1
posi tion with
v 1
equal to
64
volts . Then adjust the reset spring such that the
contacts
will just cl ose with
and V
equal to
94
volts .
2
The relay is now calibrated for approximately a
circle by applying V 1 e qual to
degree circ l e . Check the other in phas e point of the
±
ing the value of V
until the contacts are just making.
2
V
8 volts .
1 9 0
2
4 .
Time curve
- Install the p ermanent magnet
o n the relay.
Adjust the p ermanent magnet
until the operating time of t h e rel ay from the
±
2 0
dial
position
i s
5. Circles Other Than
ment should not be done until th e above adj ustment
set V 1 equal to noted vol ta ge and apply
2 0
for a
degree circle h as been completed.
a s determined b y Fig.
13.
Adjust the l e ft hand resistor
until the contacts just close .
Ch eck th e circl e by timin g the relay with V
time dial position within ± 7 p ercent of
equal to rated voltage. The relay should operate fro m
the number
1 1
the ti m e s s hown in Fi g .
1 4 .
E L E C T R I C A L C H E C K P O I N T S
1 2 equal to rated voltage the
With
v 1
in Fi g .
following
approximate
voltages
ed across the coils of the 120 volt relay. Relay set
1 0
1 1
position.
volts and V
1 20
equal to
2
equal to
v 1
1 20
2 0
1 20
volts and increas
k e eper
1 1
time
seconds with V
and V
0. 6
1
2 0
D e grees - This adjust
to a val u e
v 2
and V
1
should
be obtain
With 120 volts a);lplied to v
Operating Electromagnet
Lower terminals
Lag coil circuit
Restraint Electromagnet
Upper terminals
Lower terminals
Approximate d . c . resistances of the coil s are as fol
lows:
Operating Electromagnet
Lag coil - open circuit - 245 ohms
2
Restraint Electromagnet
Upper terminals 66 ohms
Lower terminals 92 ohms
for various operating circles. Resistance values can
Approximate
res istance values of left hand resistor
vary appreciably between relays.
20 degree circle
40 degree circle
60 degree circle
2
R E N E W A L P A R T S
Repair work can be done most s atisfactorily at
the factory. However, interchangeable parts can
furnished ta the customers who are equipped for do
ing repair work, When ordering parts , always give the
complete nameplate data.
57
22
58
54
2
5 7
59
2 2
54
58
4800
ohms
2250
o hms
890
ohms
be
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