ABB Relion 615 series, Technical Manual

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Characteristic Value
Reset ratio Typically 0.96
Retardation time <35 ms
Trip time accuracy in definite time mode ±1.0% of the set value or ±20 ms
1) Measurement mode = default (depends on stage), current before fault = 0.0 × I
n
, f
n
= 50 Hz, fault current with
nominal frequency injected from random phase angle, results based on statistical distribution of 1000
measurements
2) Includes the delay of the signal output contact
4.3.4.11 Technical revision history
Table 470: 87A, 87B, 87C Technical revision history
Technical revision Change
B Function name changed from HIPDIF to HIAPDIF,
HIBPDIF, HICPDIF
4.3.5 Motor differential protection 87G
4.3.5.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Motor differential protection MPDIF 3dI>M 87G, 87M
4.3.5.2 Function block
TRIP
OPR_LS
I_C2
87G/87M
BLOCK
BLK_OPR_LS
BLK_OPR_HS
OPR_HS
INT_BLKD
I_A1
I_B1
I_C1
I_A2
I_B2
GUID-DB494388-9E4F-42FE-B03F-F4705B717173 V1 EN
Figure 287: Function block
4.3.5.3 Functionality
The motor winding failure protection function 87G, 87M is a unit protection function. The
possibility of internal failures of the motor is relatively low. However, the consequences
Section 4
1MAC059074-MB A
Protection functions
568 615 series ANSI
Technical Manual