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745
Transformer Management Relay
5–74
1000
100
10
1
0.1
1.00
FIGURE 5–34: Volts Per Hertz Curve 2
The curve for the inverse curve 3 shape is derived from the formula:
T
----------------------------------------- -
=
V F ⁄
------------------ -
Pickup
where
T = operate time (seconds)
D = delay setpoint (seconds)
V = fundamental RMS value of voltage (V)
F = frequency of voltage signal (Hz)
Pickup = volts-per-hertz pickup setpoint (V/Hz)
10000
1000
100
10
1
0.1
1.00
FIGURE 5–35: Volts Per Hertz Curve 3
http://www.GEindustrial.com/multilin
1.20
1.40
1.60
1.80
Multiples of Volts/Hertz Pickup
V
D
when
--- -
>
Pickup
F
0.5
1
–
1.20
1.40
1.60
1.80
Multiples of Voltz/Hertz Pickup
S4 Elements
Time
Delay
Setting
10
3
1
0.3
0.1
2.00
(EQ 5.14)
Time
Delay
Setting
ò
10
3
1
0.3
0.1
2.00
GE Multilin
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