4.68
SEL-700G Relay
Instruction Manual
Date Code 20170814
Protection and Logic Functions
Group Settings (SET Command)
Figure 4.39
Dual-Level Volts/Hertz Time-Delay Characteristic 24CCS = DD
Figure 4.40
Composite Inverse/Definite-Time Overexcitation Characteristic, 24CCS = ID
.01
0.1
1.0
10
100
1000
100
110
120
130
140
24D2P2 = 118%
24D2D2 = 6 s
24D2P1 = 110%
24D2D1 = 60 s
Time (Minutes)
Transformer Limit Curve
on Gen. Voltage Base
Mfg-Generator
Limit Curve
Volts/Hertz (%)
Relay Characteristic
Time (Minutes)
Generator Manufacturer's
Recommended Protection Curve
Transformer Limit Curve on
Generator Voltage Base
.001
.01
0.1
1.0
10
100
100
110
120
130
140
Volts/Hertz (%)
1000
24D2P2 = 118%
24D2D2 = 1.2 s
24IP=108%
Summary of Contents for SEL-700G Series
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