And - Westinghouse CVE Instructions Manual

TY P E C V E A N D CV E- 1 R E LAY S
2 3
1
25
Y 1
- SYMCHRO VER I F I ER RELAY-TYPE CV£-1
0 - OPERAT I N G ELECTROIIA6MET
Y 2
R - IE STU I NT ELECTROMAGNET
- VOLTAGE BUS UN I T
- VOLTAGE U I M E UN I T
F i g. 7 External S chematic of C VE- 1 for Dead- L ine-Hot- B u s and Hot- L i ne-Dead- B u s R e closing.
A c c e p ta n c e C h e c k
The following check is rec ommended t o insure
that t he re lay is in proper working order:
I n d i c a t i n g C o n t a c to r Sw i t c h ( I C S) - W h e n U s e d
Close the main relay c ontacts and pass sufficient
d-e current through the disc-unit contact circuit to
close the contacts of the ICS. This valu e of current
should be not greater than the value marked on the
name plate . The o peration
drop fre e ly .
The contact gap should b e approximately . 047 "
between the bridging moving contact and the adjust­
able stationary contacts.
tact should touch both stationary contacts simultan­
eously.
D i s c Unit
frame will coincide with the "0" mark on the time
1 . Contacts - The index
dial when the stationary contact has moved through
approximately one -half of its normal deflection. There­
fore , with the stationary contact resting against the
6
1
D EV I CE NUMBER CHART
O F
TYPE
CVE-1
indicator target s h ould
The bridging moving con­
mark on the movement
CLO S I NG C I RCU I T OF 52
b
52 - POWER C I RCU I T BREAKER
- BREAKER AUJ I U I ARY CONTACT
101 - C I RC U I T BREAKER CONTROL SWI TCH
"0" m ark by approximately 0 . 0 20 " .
bac kstop , the index mark is offset to the right of the
of the various time dial positions in line with the
index mark will give operating times as shown on
the time curve .
2 .
Operating Circle - C o nn ect the relay p e r the t e st
1 2 .
diagram of Fig. T he contacts should j ust clo s e
under t h e following two conditi o n s :
= . =
1 ) W h e n v 2 v 1 rated voltage and their phase
difference is betw e e n 1 8 ° and 2 2° ( either leadi ng
or l agging).
=
±
2 )
When v 1 rated voltage and
94 4V. i n phase with
3 . Time Curv e - With the time dial set at position
1 1 , the c ontact should c l os e in 20
v 1

and

v 2 are equal to rated v ol tag e at zero phas e
angl e .
T o check the time curv e , s e t the time dial i n
1 1 and apply v
position
tage. The contacts s h ould close in
62 9 A086
The placement
v 2 i s increased to
V 1
± 1
seconds whe n
± 1 seconds.
equal to rated vol­
and V
1 2
2 0