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T YPE CVE RELAY
6.
Typical Voltage- Angle Characteristic of CVE for
Fig.
Various Closing Angle Settings. Ratec/ Voltage on
One Circuit.
where T B
b reak. e r closing time in seconds
=
Let T B =0.5 seconds
(:1+ 17.3x0.5=48.6°
Then
Ind icati n g C a n tactor S w i tch ( I C S) - When U s ed
No setting is required on the ICS unit except the
selection of the 0.2 or 2.0 ampere tap setting. This
selection is made by connecting the lead located in
front of the tap block to the desired setting by means
of the connecting screw.
I NST ALLATI ON
The relays should be mounted on switchboard
panels
or their equivalent in a location free from
dirt,
moisture, excessive vibration, and heat. Mount
the relay vertically by means of the four mounting
holes on the flangs for semi-flush
means of the rear mounting stud or studs for pro-
184A997
Fig.
jection mounting. Either a mounting stud
mounting screws may be utilized for grounding the
relay.
directly to the terminals by means of screws for steel
panel mounting or the terminal studs furnished with
the
studs may be easily removed or inserted by locking
two
with a wrench.
For detailed FT Case information refer to I.L. 41-076.
ADJUSTMENTS AND MAINTENANCE
tion
Upon receipt of the relay, no customer adjustments,
other than those covered under "Settings" should be
required.
A ccep tance C heck
mounting or by
that the relay is in proper working order:
32
30
28
26
24
22
20
18
16
4
12
10
4
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w
0
w
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o
PHASE ANGLE
(DEGREES)
7.
Typical Time - Phase Angle Curves of CVE. Ratec/
Voltage on Both Circuits. No.
The
electrical
connections
relay
for thick panel mounting. The terminal
on
nuts
the stud and then
The proper adjustments to insure correct opera
of this relay have been made at the factory.
The following check is recommended to insure
CIRCLE
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w
..
w
�
>
rig�
i':
�
w
ct
E
0
"'
w
�
"'
i=
"
w
"
-'
<(
�
60'
CIRCLE
w
w
4
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o
�
ro
BETWEEN
VOLT AGES
184A998
�t11
Time 0/al Setting.
or
the
may
be made
prope r nut
turning
the
5
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