Operating Characteristics; Burdens; Potential; Construction - GE CAP15A Instructions Manual

G~I-12083
OPERATING CHARACTERISTICS
The phase angle and time characteristics of the 60 cycle relay are shown in Figures 1, 1A and 2 with
the recommended connections.
BURDENS
CURRENT
The burden imposed by each current coil at five amperes is given in the table below. With standard
connections, one of the three current transformers supplies two current coils in series so that the burden
on that transformer will be twice the amount given below. The other two current transformers will each
supply one current coil and will have a burden as given in the following table:
TYPE CAP15A
Frequency
Volt Amps
~Iatts
P. F.
60 0.40 0.20 0.50
50
0.35 0.20 0.57
25 0.60
0.55
0.92
TYPE CAP15B
60 3.6 1.8 0.50
50 3.2 1.8 0.57
25 2.6 2.4 0.92
POTENTIAL
The potential burdens per relay circuit (studs 13-14, 15-16, 17-18 and 19-20) are listed in the
following table.
Relay Frequency Volt Amps Watts P. F.
CAP15A
60
5.3 1.60
0.30
50 6.2
2.15
0.35
25
3.5 1.85 0.53
CAP15B 60 4.7 2.35 0.50
50 5.8 2.89 0.50
25 3.5
1.85
0.53
CONSTRUCTION
The stator has eight laminated magnetic poles projecting inward and arranged symmetrically around a
central magnetic core. The poles are fitted with current and potential coils. In the annular air gap
between the coils and the central core, is the cylindrical part of the cup-like aluminum rotor, which
turns freely in the air gap. The central core is fixed to the stator frame and the aluminum cup rotates
carrying the moving contacts.
This construction provides a higher torque and a lower rotor inertia than the induction disk construc-
tion, and makes the relay faster and more sensitive than the disk-type relays.
The CAP relays are contained in an S2 drawout case providing a means to remove the relay from the
circuitry without disconnecting any wiring.
The outline and panel drilling diagram is shown in Figure 15.
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