Siemens SIPROTEC 7SD610 User Manual

Technical Data
4.3 Differential Protection
SIPROTEC, 7SD610, Manual
C53000-G1176-C145-6, Release date 02.2011
339
Self-Restraint
Inrush stabilization
Conditioning for Transformers (optional)
Emergency operation
Frequency
Standard precision of operational measured values
Current transformer error at each end of the protected object
Ratio between operating accuracy limit factor
and nominal accuracy limit factor n'/n
1 to 10.00 Increment 0.01
Transformer error at n'/n 0.5 % to 50.0 % Steps 0.1 %
Transformer error at n
.
I
N
(class) 0.5 % to 50.0 % Steps 0.1 %
Further restraint quantities
(adaptive self-restraint)
Frequency deviations, delay time differences, har-
monics, synchronous quality, jitter
Restraint ratio
2. Inrush stabilization I
2fN
/I
fN
0 % to 45 % Steps 1 %
Max. current for restraint I
N
= 1 A 1.1 A to 25.0 A Increment 0.1 A
I
N
= 5 A 5.5 A to 125.0 A
Crossblock Function Can be switched on/off
Max. action time for crossblock CROSSB 2HM 0.00 s to 60.00 s
or 0 (crossblock disabled)
or ∞ (active until dropout)
Increments 0.01 s
Matching of Vector Group 0 to 11 (x 30°) Increment 1
Star-point conditioning earthed or non-earthed
(for each winding)
Communication failure see section „Time Overcurrent Protection“
Operating range 0.8 ≤ f/f
N
≤ 1.2
stable when starting machine
The standard precision of the operational measured values of the differential protection from ± 0,5 % of the rated opera-
tional current is ensured up to a transformer error adjustment of 2:1.

Siemens SIPROTEC 7SD610 Specifications

General

Brand	Siemens
Model	SIPROTEC 7SD610
Category	Relays
Language	English