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GEI-83910
CHARACTERISTICS
OPERATING PRINCIPLES
The three main units of the CLPG12C relay are of the high-speed efficient
eight-pole cup structure.
They most closely resemble an induction motor, except
that the rotor iron is stationary whi 1 e the rotor conductor port i on (the cup) is
free to rotate.
PICKUP
The relays can be set to pick up, i.e. close the N.O. Contacts, at the values
of current shown in the
RATINGS
section.
The method of adjusting pickup is
described in the INSTALLATION PROCEDURE section.
OPERATING TIME
Figure 3 shows the operating time of the two overcurrent units (Gl and G2) as
a function of operating current.
Figure 4 shows the operating time of the
directional unit (GO) as a function of multiples of product pickup.
TABLE I
60 C.P.S. CURRENT BURDENS AT MINIMUM Gl PICKUP
MEASURED BURDENS IN
OHMS IMPEDANCE AT:
Gl Transformer
Gl
G2 Tap R
X
Z
5
10
20
60
Circuit
Connection
Rating
Range Ohms Ohms Ohms
Amps Amps Amps
Amps
Amps
Amps
Operating
Shunt
0.4-1.6 0.5-2 0.80 1.84 2.00
2.00 1.80 1.50
0.95
(Studs 3-4)
Shunt
0.4-1.6 1 - 4 0.60 1.36 1. 50
1.50 1.20 1.00
0.70
Stepup
0.4-1.6 0.5-2 2.44 3.42 4.20
4.20 3.10 2.20
1.20
Stepup
0.4-1.6 1 - 4 2.12 3.12 3.80
3.80 2.60 2.00
1.10
Shunt
0.8-3.2 1 - 4 0.30 0.70 0.76
0.76 0.70 0.57
0.40
Shunt
0.8-3.2 2 - 8 0.23 0.52 0.58
0.58 0.50 0.42
0.31
Stepup
0.8-3.2 1 - 4 0.73 1.04 1.26
1.26 1.20 1.05
0.75
Stepup
0.8-3.2 2 - 8 0.64 0.94 1.14
1.14 1.00 0.80
0.50
Polarizing
All
All
All
0.25 0.04 0.26
0.26 0.23 0.21
0.20
(Studs 5-6)
8URDEN
The burdens imposed on the current transformers are shown in Table
I.
The
capacitive potential circuit burden, calculated at 120 volts, 60 Hz, is shown in
the following table:
Potential Circuit Burdens
WATTS
VARS
VOLT AMPERES
18
3.18
18.35
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