Siemens siprotec 7SD5 User Manual

4 Technical Data
534
7SD5 Manual
C53000-G1176-C169-1
Delay Times
Self-Restraint
Inrush Restraint
Conditioning for Transformers (optional)
Emergency Operation
Frequency Operating Range
Delay of I-DIFF stage T-DELAY I-DIFF> 0.00 s to 60.00 s
or ∞ (no trip)
Increments 0.01 s
Delay of I-DIFF stage
for 1-phase pickup in isolated/compensated net-
works
T3I0 1PHAS 0.00 s to 0.50 s
or ∞ (stage disabled
for 1-phase pickup)
Increments 0.01 s
Expiry tolerances 1 % of set value or 10 ms
The set times are pure delay times
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 Increments 0.01
Transformer error at n'/n 0.5 % to 50.0 % Increments 0.1 %
Transformer error at n x I
N
(class) 0.5 % to 50.0 % Increments 0.1 %
Further restraint quantities
(adaptive self-restraint)
Frequency deviations, delay time differ-
ences, harmonics, synchronous quality,
jitter
Restraint ratio
2. Harmonic I
2fN
/I
fN
0 % to 45 % Increments 1 %
Max. current for restraint I
N
= 1 A 1.1 A to 25.0 A Increments 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 dis-
abled)
or ∞ (active until
dropout)
Increments 0.01 s
Vector group matching 0 to 11 (x 30°)Increments 1
Star-point conditioning earthed or non-earthed
(for each winding)
In the event of a communication failure, with distance
protection out of service
See Section „Time Overcurrent Protection“
Frequency 0.8 ≤ f/f
N
≤ 1.2
stable when starting machine
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Siemens siprotec 7SD5 Specifications

General

Brand	Siemens
Model	siprotec 7SD5
Category	Relays
Language	English