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Functions
6.8.2
Programming Settings
General
Setting Values
6-96
φ
Pickup A
# !ÃTU6SUVQÃ8VSS@IU
# "ÃTU6SUVQÃUDH@
# #ÃGP8FÃSPUPSÃUDH@
0
T
φ
A
F# 6805
>Rotor locked
F# 6801
>BLK START-SUP
# ÃA8UÃ#'%%
PI
PAA
„1"
Figure 6-44
Logic Diagram for Motor Starting Protection
Motor starting protection is only effective and accessible if address was set
to Enabled during configuration of protective function. If the motor starting protection
feature is not required, address should be set to Disabled. The function may
switched 21 or 2)) at address )&7 .
Example: Motor with the following data:
Nominal Voltage
Nominal Current
Start-Up Current
Long-Term Current Rating
Start-Up Duration for I
CT Ratio I
/ I
N CT prim
N CT sec
The setting for Address 67$5783 &855(17 is calculated as follows:
I
STARTUP-sec
For reduced voltage, the start-up current is also reduced almost linearly. At 80% nom-
inal voltage, the start-up current in this example is reduced to
0.8 * I
=
2.5 A.
.STARTUP
or
or
or
Hrh†ˆ…r€r‡Ã
hqÃU…vƒƒvtÃG‚tvp
or
V
= 6600 V
N
I
= 126 A
G
I
= 624 A
STARTUP
I
= 135 A
MAX
T
STARTUP
STA MAX
200 A / 1 A
I
STARTUP
⋅
----------------------- - I
=
=
N CT sec
I
N CT prim
Fault Cond.
F# 6823
START-SUP PU
F# 6821
or
START-SUP TRIP
R
F# 6822
Rotor locked
&
S Q
F# 6812
START-SUP BLK
F# 6811
START-SUP OFF
= 8.5 sec
624 A
⋅
-------------- - I
3.12 A
=
A
200 A
7SJ63 Manual
C53000-G1140-C120-1
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