ABB 615 Series - Function Block; High-Impedance Differential Protection 87 A, 87 B, 87 C; Identification; Technical Revision History

Characteristic Value
Retardation time <35 ms
Trip time accuracy in definite time mode ±1.0% of the set value or ±20 ms
Suppression of harmonics DFT: -50 dB at f = n × f
n
, where n = 2, 3, 4, 5, …
1) Current before fault = 0.0, f
n
= 50 Hz, results based on statistical distribution of 1000 measurements
2) Includes the delay of the signal output contact
4.3.3.10 Technical revision history
Table 450: 87LOZREF Technical revision history
Technical revision Change
B Unit for setting Pickup value 2.H changed from %In
to %.
C Internal Improvement.
4.3.4 High-impedance differential protection 87A, 87B, 87C
4.3.4.1 Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
High-impedance differential protection
for phase A
HIAPDIF dHi_A> 87A
High-impedance differential protection
for phase B
HIBPDIF dHi_B> 87B
High-impedance differential protection
for phase C
HICPDIF dHi_C> 87C
4.3.4.2 Function block
TRIP
PICKUP
87A
BLOCK
I_A TRIP
PICKUP
87B
BLOCK
I_B TRIP
PICKUP
87C
BLOCK
I_C
GUID-936A0B51-A681-4814-A3C8-742DDC670FCF V1 EN
Figure 276: Function block
Section 4 1MAC059074-MB A
Protection functions
550 615 series ANSI
Technical Manual