4.96
SEL-700G Relay
Instruction Manual
Date Code 20170814
Protection and Logic Functions
Group Settings (SET Command)
this transient condition, do not use a time-dial setting that results in curve
times below three cycles.
The neutral time-overcurrent element, 51NT, responds to neutral channel
current IN, as shown in Figure 4.60.
Figure 4.60
Neutral Time-Overcurrent Element 51NT
Table 4.23
Neutral Time-Overcurrent Settings
Setting Prompt
Setting Range
Setting Name :=
Factory Default
NEUT TOC LEVEL
OFF, 0.50–16.00 A
a
a
Setting range shown is for 5 A nominal CT rating. Divide by 5 for 1 A CTs.
51NP := OFF
NEUT TOC CURVE
U1–U5, C1–C5
51NC := U3
NEUT TOC TDIAL
0.50–15.00
b
0.05–1.00
c
b
Setting range shown is for 51_C := U_.
c
Setting range shown is for 51_C := C_.
51NTD := 3.00
EM RESET DELAY
Y, N
51NRS := N
CONST TIME ADDER
0.00–1.00 s
51NCT := 0.00
MIN RESPONSE TIM
0.00–1.00 s
51NMR := 0.00
NSEQ TOC TRQCTRL
SEL
OGIC
51NTC := 1
q
From Figure 4.53 or Figure 4.54
w
From Figure 4.84
Table 4.24
Residual Time-Overcurrent Settings
Setting Prompt
Setting Range
Setting Name :=
Factory Default
a
a
m = X or Y.
RES TOC LEVEL
OFF, 0.50–16.00 A
b
b
Setting range shown is for 5 A nominal CT rating. Divide by 5 for 1 A CTs.
51GmP := OFF
RES TOC CURVE
U1–U5, C1–C5
51GmC := U3
RES TOC TDIAL
0.50–15.00
c
0.05–1.00
d
c
Setting range shown is for 51_C := U_.
d
Setting range shown is for 51_C := C_.
51GmTD := 1.50
EM RESET DELAY
Y, N
51GmRS := Gm
CONST TIME ADDER
0.00–1.00 s
51GmCT := 0.00
MIN RESPONSE TIM
0.00–1.00 s
51GmMR := 0.00
TOC TRQ CONTROL
SEL
OGIC
51GmTC := 1
51NP
|IN|
Setting
51NTC
NX1DIR
Torque Control Switch
Torque
Control
51NP
(Pickup)
51NR
(Reset)
51NT
(Curve
Timeout)
Relay Word
Bits
SEL
OGIC
Setting
51NT Neutral
Time-Overcurrent Element
Curve Timing and Reset Timing
Settings
51NP
Pickup
51NC
Curve
Type
51NTD
Time
Dial
51NRS
Electromechanical
Reset? (Y/N)
51NCT
Const. Time Add.
51NMR Min.
Response
Note: 51NT element is shown above
51N2T is similar.
1
2
51NTC
Torque Control
State Switch
Position
Logical 1
Closed
Logical 0
Open
Setting
51NRS =
Reset Timing
Y
Electromechanical
N
1
Cycle
Summary of Contents for SEL-700G Series
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