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TY P E CV E A N D CV E - 1 R E L AY S
INTERNAL SCHEMATIC
v
,
v ,
v,
LEFT MUD
RESI STOR( f,V, )
m
,--- -- -- --- - -- -- -- -- -- �
VOLTAGE U
TELEPMOME
TYPE lEU
-
LE" HAIID
( f . Y · )
-- -
L
__
--
- -
I
3
FRO!H
Fig. 5.
Internal Schematic of C V E- 1
It is recommended that the number of reclosures
be limited b y using either a single - or a multi-shot
reclosing relay in conjunction with the
C H A R A C T E R I S T I C S
T h e typ e
CVE
relay and
for operating circles from
in Fig.
8 .
As shipped from t h e factory t h e relay i s
calibrated for t h e
2 0
degree circle.
if
apply w hen one side has rated voltag e .
op erat e s ,
the other voltage falls within the appro
priate circl e.
The op erating time of the relay i s s hown in Fig.
9.
These time curves are obtained fro m the #
dial s etting w hen the applie d voltages are equal to
rated voltage and of the same frequency.
op eratin g times c an be obtained at different time
dial s ettings as shown in Fig.
�
F ig.
1 1
shows how hig h a slip freque ncy will
cause operation. T he maximum slip frequency is a
function o f the c ircle and time dial settin gs. This
c harac teri stic is of interest in e s timating the angular
differ ence
at the instant of breaker closur e , for
c ases w here the two systems ar e slipping slowl y .
4
VOLTAGE UMIT
TELEPHOIIE
TYPE RELAY
I I
GMT HAJID( F . V . )
RIGHT HAMD
RESI STOR( f.'/. )
OPEIIATIIIG
ELECTROMAGIIET
(REAl)
RESTitliiiT
ELECTROMAGMET
{FROIIT)
-
IIED HAIIOLE
TEST SWITCH
--
- -
-
S <b '·
TERMIIIAL
VIEW
188A624
CVE- 1
Relay:
CVE- 1
can b e adjusted
20
to
60
degree s as shown
T h e s e circl es
T h e r elay
11
time
Shorter
10 .
Fig. 1 5 s hows typic al
40°,
and
6 0°
circle s e ttin gs.
B u r d en
T he burden imposed on e ac h po tential source
by t he
CVE
relay and
CVE-1
age applied to bo th circuits of the r el ay is as follows:
Voltages
in Phase
Volt-amperes
1 5 . 4
Power Factor
. 42 2
Watts
6 . 5
The burden of t h e
with rated voltage appli ed to one circuit is as follow s :
Volt-amperes
10. 8
Power Factor
. 422
4 . 6
Watts
T h e burden o f each telephone relay at
is as follows :
1 0 . 6 2
volt- amp eres
C o n t i n u o u s R a t i n g
These relays will c ontinuously stand 1 10% of
rated
voltage
applied
to the two circuits ,
separately or simultaneously,
S E T T I N G S
D i s c U n i t
As
s hipped
from
calibrated
for a 20 degree circle.
adjusting the left hand resistor in the relay. The
circles
from 20 to 60 degrees can be obtained by
procedure is described under
tenance .
Set the time dial s o that the relay will not oper
ate
when the systems are swinging too fast. The
# 1 1 time dial is recommended when the 60° circle
40° circl e. A setting as low
setting is used. A setting of #4 time dial or higher
V 2
recommended with .the
as the
time dial s hould be s atisfactory with the
20°
· circle. Note from Fig.
tt in g .
ate in
1 . 4
s econds in the
with the 20° s
If a longer delay is desired a
e
time- dial setting
higher
m ay be u s e d.
2 0°,
CVE
re s e t times for
r elay , with rated volt
Voltage s 1 80
Out
Phase
Degrees
of
13 . 5
. 42 2
5 . 7
C V E
relay and
CVE- 1
relay
1 20
volts
P ower Factor
0 . 64
either
the
factory the
relays are
other operating
Adjustments and Main
'12
10
that the relay will oper
time dial positions
and
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