ABB Relion 611 Series, Technical Manual

Page: 307 / 536

4.7.9 Technical data
Table 329: STTPMSU Technical data
Characteristic Value
Operation accuracy Depending on the frequency of the measured
current: f
n
±2 Hz
±1.5% of the set value or ±0.002 × I
n
Start time
1)2) Minimum Typical Maximum
I
Fault
= 1.1 × set
Start
detection A
27 ms 30 ms 34 ms
Operate time accuracy ±1.0% of the set value or ±20 ms
Reset ratio Typically 0.90
1) Current before = 0.0 × I
n
, f
n
= 50 Hz, overcurrent in one phase, results based on statistical distribution
of 1000 measurements
2) Includes the delay of the signal output contact
4.7.10 Technical revision history
Table 330: STTPMSU Technical revision history
Technical revision Change
B Internal improvement
C Added setting Ini start up counter.
1MRS757454 D
Section 4
Protection functions
611 series 301
Technical Manual