4.97
Date Code 20170814
Instruction Manual
SEL-700G Relay
Protection and Logic Functions
Group Settings (SET Command)
The residual time-overcurrent elements, 51GXT and 51GYT, respond to
residual current IGm, as shown in Figure 4.61.
Figure 4.61
Residual Time-Overcurrent Elements
Time-Overcurrent Curves
The following information describes the curve timing for the curve and time
dial settings made for the time-overcurrent elements (see Figure 4.58–
Figure 4.61). The U.S. and IEC time-overcurrent relay curves are shown in
Figure 4.62–Figure 4.71. Curves U1, U2, and U3 (Figure 4.62–Figure 4.64)
q
From Figure 4.54 or Figure 4.55
w
From Figure 4.83
e
From Figure 4.55
51GXP
|IGX|
Setting
51GXTC
Torque Control Switch
Torque
Control
51GXP
(Pickup)
51GXR
(Reset)
51GXT
(Curve
Timeout)
Torque
Control
Torque Control
State Switch
Position
Logical 1
Closed
Logical 0
Open
Setting
51GXRS =
Reset Timing
Y
Electromechanical
N
1
Cycle
Relay
Word
Bits
SEL
OGIC
Setting
51GXT Phase
Time-Overcurrent Element
Curve Timing and Reset Timing
Settings
51GXP
Pickup
51GXC
Curve
Type
51GXTD Time
Dial
51GXRS Electromechanical
Reset? (Y/N)
51GXCT
Const. Time Add.
51GXMR Min.
Response
Relay
Word
Bits
(a
) Generator Protection (SEL-700G0, SEL-700G1, and SEL-700GT)
(b)
Intertie Protection (SEL-700GT)
GX1DIR
1
2
51GYP
|IGY|
Setting
51GYTC
Torque Control Switch
Torque
Control
51GYP
(Pickup)
51GYR
(Reset)
51GYT
(Curve
Timeout)
Torque
Control
Torque Control
State Switch
Position
Logical 1
Closed
Logical 0
Open
Setting
51GYRS =
Reset Timing
Y
Electromechanical
N
1
Cycle
SEL
OGIC
Setting
51GYT Phase
Time-Overcurrent Element
Curve Timing and Reset Timing
Settings
51GYP
Pickup
51GYC
Curve
Type
51GYTD Time
Dial
51GYRS Electromechanical
Reset? (Y/N)
51GYCT
Const. Time Add.
51GYMR Min.
Response
GY1DIR
1
2
51GmP
|IGm|
Setting
51GmTC
Torque Control Switch
SEL
OGIC
Torque Control
51GmP
(Pickup)
51GmR
(Reset)
51GmT
(Curve
Timeout)
Relay
Word
Bits
SEL
OGIC
Setting
51GmT Phase
Time-Overcurrent Element
Curve Timing and Reset Timing
Settings
51GmP Pickup
51GmC Curve
Type
51GmTD Time
Dial
51GmRS Electromechanical
Reset? (Y/N)
51GmCT
Const. Time Add.
51GmMR Min.
Response
(c)
Feeder Protection (SEL-700GW)
51GmTC Torque
Control
State Switch
Position
Logical 1
Closed
Logical 0
Open
Setting
51GmRS =
Reset Timing
Y
Electromechanical
N
1
Cycle
m = X or Y
3
Summary of Contents for SEL-700G Series
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