4.1.9.10
Technical revision history
Table 317:
49M Technical revision history
Technical revision
Change
B
Added a new input
AMB_TEMP
.
Added a new selection for the
Env temperature
mode setting "Use input".
C
Internal improvement.
D
Time constant stop range maximum value changed
from 8000 s to 60000 s.
E
Internal improvement.
4.2
Ground-fault protection
4.2.1
Non-directional ground-fault protection 51N, 51G, 50N, 50G,
50N-3, 50G-3
4.2.1.1
Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Non-directional ground-fault protection,
low stage
EFLPTOC
Io>
51N, 51G
Non-directional ground-fault protection,
high stage
EFHPTOC
Io>>
50N, 50G
Non-directional ground-fault protection,
instantaneous stage
EFIPTOC
Io>>>
50N-3, 50G-3
4.2.1.2
Function block
51N,51G
IG
TRIP
BLOCK
PICKUP
ENA_MULT
50N,50G
IG
TRIP
BLOCK
PICKUP
ENA_MULT
50N-3,50G-3
IG
TRIP
BLOCK
PICKUP
ENA_MULT
GUID-7EBE9C0C-3933-49AD-90BB-C4DF391547D6 V1 EN
Figure 148:
Function block
4.2.1.3
Functionality
The non-directional ground-fault protection function 51N, 51G, 50N, 50G, 50N-3, 50G-3
is used as non-directional ground-fault protection for feeders.
Section 4
1MAC059074-MB A
Protection functions
314
615 series ANSI
Technical Manual
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