4.180
SEL-700G Relay
Instruction Manual
Date Code 20170814
Protection and Logic Functions
Other Settings
Figure 4.120
Loss-of-Potential Generic Logic (Applies to both X and Y Sides)
Other Settings
Demand Metering
The SEL-700G provides demand and peak demand metering, selectable
between thermal and rolling demand types, for the following values:
➤
IAX, IBX, ICX, IAY, IBY, ICY phase currents (A primary)
➤
IGX, IGY residual-ground current
(A primary; IG = 3I0 = IA + IB + IC)
➤
3I2X, 3I2Y negative-sequence current (A primary)
Table 4.51 shows the demand metering settings. Also refer to Section 5:
Metering and Monitoring and Section 7: Communications for other related
information for the demand meter.
1 s
S
R
Q
Q
0
0
1 s
1 cycle
0
LOPX/LOPY
| V1 | > 10.5 V
Δ
| V1 | > 25%
Δ
| I1 |> 0.1 • I
NOM
Δ
| I2 | > 0.1 • I
NOM
Δ
| I0 | > 0.1 • I
NOM
| V2 | < 5 V
| V0 | < 5 V
| V1 | > 0.75 • Nominal Voltage
(RESET has priority)
Notes:
I
NOM
is 1 A or 5 A, depending on the part number.
I
NOM
is the phase secondary input rating.
LOPX is determined using measurements and settings from the X side and
LOPY is determined using measurements and settings from the Y side.
When DELTAY_X := DELTA and EXT3VO_X := VS/VN, the V0 input to the logic
is not taken into account.
Relay
Word
Bit
Δ
I1 > 10°
Δ
I2 > 10°
Δ
I0 > 10°
LOPBLKX or LOPBLKY
OOS (X or Y Side)
Table 4.51
Demand Meter Settings
(Sheet 1 of 2)
Setting Prompt
Setting Range
Setting Name :=
Factory Default
a
ENABLE DEM MTR
THM, ROL
EDEM := ROL
DEM TIME CONSTNT
5, 10, 15, 30, 60 min
DMTC := 15
PH CURR DEM LVL
OFF, 0.50-16.00 A
b
OFF. 0.10-3.20 A
c
PHDEMP
m
:= OFF
PHDEMP
m
:= OFF
Содержание SEL-700G Series
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