K
is a constant which depends of the generators size and design
NS2PTOC has a wide range of
K
settings and the sensitivity and capability of
detecting and tripping for negative sequence currents down to the continuous
capability of a generator.
In order to match the heating characteristics of the generator a reset time parameter can
be set.
A separate definite time delayed output is available as an alarm feature to warn the
operator of a potentially dangerous situation.
8.9.3
Function block
IEC08000359-2-en.vsd
NS2PTOC
I3P*
BLOCK
BLKST1
BLKST2
TRIP
TR1
TR2
START
ST1
ST2
ALARM
NSCURR
IEC08000359-1-EN V2 EN
Figure 121:
NS2PTOC function block
8.9.4
Signals
Table 141:
NS2PTOC Input signals
Name
Type
Default
Description
I3P
GROUP
SIGNAL
-
Group connection for neg seq.
BLOCK
BOOLEAN
0
Block of function
BLKST1
BOOLEAN
0
Block of step 1
BLKST2
BOOLEAN
0
Block of step 2
Table 142:
NS2PTOC Output signals
Name
Type
Description
TRIP
BOOLEAN
Common trip signal
TR1
BOOLEAN
Trip signal for step 1
TR2
BOOLEAN
Trip signal for step 2
START
BOOLEAN
Common start signal
ST1
BOOLEAN
Start signal for step 1
Table continues on next page
Section 8
1MRK 502 048-UEN A
Current protection
244
Technical manual
Summary of Contents for REG650 ANSI
Page 1: ...Relion 650 series Generator protection REG650 Technical manual ...
Page 2: ......
Page 36: ...30 ...
Page 42: ...36 ...
Page 50: ...44 ...
Page 64: ...58 ...
Page 86: ...80 ...
Page 262: ...256 ...
Page 300: ...294 ...
Page 438: ...432 ...
Page 476: ...470 ...
Page 592: ...586 ...
Page 664: ...658 ...
Page 678: ...672 ...
Page 726: ...720 ...
Page 727: ...721 ...