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GE K-4 5495
TABLE II
BASIC MTN
REACH
RANGE
ANGLE OF
ONE SECOND
BASIL REACH TAPS
(ØN
OHMS)*
(0-N
OHMS)
MAX TORQUE
RATING
0.5
0.5
-
2.0
600
**
150
0.5
-
1,0
-
1.5
1.0
1.0
-
4.0
600
**
150
1.5
1.5
-
6.0
60°
**
150
1
1—4
600
**
150
1-2-3
2
2-8
600
**
150
3-
*Adjustment taps are set using middle tap at the factory.
**MaxiIiluIli torque angle can be adjusted up to 75 degrees.
The
reach of the iriho units will
increase to approxim ately 120 percent of its reach at the 60 degree setting.
CONTACTS
The contacts of the CEY52 relay will close and carry momentarily 30 amperes direct current.
However,
the circuit breaker trip circuit must be opened by an auxiliary switch contact or other suitable means since
the relay contacts have no interrupt ing rating.
TARGET SEAL-IN UNIT
The target seal-in unit used in the CEY52 relay has ratings as shown in Table III.
TABLE III
TARGET SEAL-IN UNIT
0.2
AMP
TAP
0.6 AMP TAP
0 AMP TAP
inum Operatin g
-
0.2 amp
0.6 amp
—
2.0 amp
Carry Continuously
0.4 amp
1.5 amp
3.5 amp
Carry 30 amps for
0.03_=
0.5 sec.
4.0
sec.
Carry 10 amps for
0.25 sec.
4.0 sec.
30.0 sec.
0-C
Resistan ce
+lOt
7.0 ohms
0.6 ohms
0.13 ohms
60 Cycle Impedance
52 ohms
6.0 ohms
0.53 ohms
OPERATING PRINCIPLES
The nihc units of the CEY52 relay are of the four pole inductio n cylinder construc tion in which torque
'o:roduc ed ty the interacti on
between a polarizin g
flux
and fluxes proporti onal to the restraini ng or
operatin g quantitie s.
The sc[.emlii : connecti ons of the rho jr
t
are shown
n Fia .a.
Tue
two side poles, oneraize d
by
se—tc-jhuse c' tage, prodoce the gel arzinc iu
The
flu
in the front p010, which
is
energize d by a
Dr entaq
f the
5éiPi
priase
-to-phas a vo1tiçc
ntr s
iith the polorizin g flux to produce restrain
tcr we.
Th Cl ux
in
the
rear
pole, which 1. •nero1z: by the two
I
inc
currents
associate d with the seme
zhse-
to-phase
taqe, interacts with the nolan
cc
t produce operatin g torque.
The torque ot the balance point
o
the
wit car
trierefor o
.ne
rxpr'.sed by the followin g equation :
Torque
=
0
El cos
(0-9)
-
KE
2
where:
E
phase-to—phase voltage (E
12
)
I
=
delta
current
1
-
12)
0
=
angle of maximum torque of the unit
0
=
power factor angle of fault impedance
K
=
design constant
4
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