ABB 615 Series - Technical Data; Technical Revision History

Name Type Values (Range) Unit Description
IA-bias FLOAT32 0.00...80.00 Measured bias current
amplitude phase IA
IB-bias FLOAT32 0.00...80.00 Measured bias current
amplitude phase IB
IC-bias FLOAT32 0.00...80.00 Measured bias current
amplitude phase IC
4.3.2.10 Technical data
Table 440: 87T Technical data
Characteristic Value
Operation accuracy Depending on the frequency of the measured
current: f
n
±2 Hz
±3.0% of the set value or ±0.002 × I
n
Pickup time
1)2)
Minimum Typical Maximum
Low stage
High stage
36 ms
21 ms
41 ms
22 ms
46 ms
24 ms
Reset time Typically 40 ms
Reset ratio Typically 0.96
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 output contact. When differential current = 2 × set operate value and f
n
= 50 Hz.
4.3.2.11 Technical revision history
Table 441: 87T Technical revision history
Technical revision
Change
B 5th harmonic and waveform blockings taken to event
data set
C Added setting Slope section 3 . Added input
TAP_POS
1MAC059074-MB A Section 4
Protection functions
615 series ANSI 537
Technical Manual