ABB 615 Series - Function Block; Functionality; Identification; Technical Revision History

Characteristic Value
Trip time accuracy in IDMT mode
3)
±5.0% of the set value or ±20 ms
Suppression of harmonics -50 dB at f = f
n
-3 dB at f = 13 × f
n
1) Fundamental frequency current = 1.0 × I
n
, harmonics current before fault = 0.0 × I
n
, harmonics fault current
2.0 × Pickup value , results based on statistical distribution of 1000 measurements
2) Includes the delay of the signal output contact
3) Maximum
Pickup value = 2.5 × I
n
, Pickup value multiples in range of 2...20
4.2.5.10 Technical revision history
Table 397: 51NHA Technical revision history
Technical revision Change
B Internal improvement.
C Internal improvement.
4.2.6 Wattmetric-based ground-fault protection 32N
4.2.6.1 Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Wattmetric-based ground-fault
protection
WPWDE Po> -> 32N
4.2.6.2 Function block
TRIP
PICKUP
IG
32N
VG
BLOCK
RCA_CTL
GUID-4C60F4EA-02BE-4E2A-AEE4-CFC5B15A4B08 V1 EN
Figure 196: Function block
4.2.6.3 Functionality
The wattmetric-based ground-fault protection function 32N can be used to detect ground
faults in ungrounded networks, compensated networks (Petersen coil-grounded
networks) or networks with a high-impedance grounding. It can be used as an alternative
solution to the traditional residual current-based ground-fault protection functions, for
1MAC059074-MB A Section 4
Protection functions
615 series ANSI 409
Technical Manual