Technical data

Siemens SIP · 2008
12 Motor Protection / 7SK80
12
Technical Data page 9
Technical data
Flexible protection functions (e.g. ANSI 27, 32, 37, 47, 50, 55, 59, 81R) (cont'd)
Times
Pickup times
Current, voltage
(phase quantities)
With 2 times the setting value
With 10 times the setting value
Current, voltages
(symmetrical components)
With 2 times the setting value
With 10 times the setting value
Power
Typical
Maximum (low signals and
thresholds)
Power factor
Frequency
Rate-of-frequency change
With 1.25 times the setting value
Binary input
Approx. 30 ms
Approx. 20 ms
Approx. 40 ms
Approx. 30 ms
Approx. 120 ms
Approx. 350 ms
300 to 600 ms
Approx. 100 ms
Approx. 220 ms
Approx. 20 ms
Dropout times
Current, voltage (phase
quantities)
Current, voltages (symmetrical
components)
Power
Typical
Maximum
Power factor
Frequency
Rate-of-frequency change
Binary input
<20ms
<30ms
<50ms
< 350 ms
< 300 ms
< 100 ms
< 200 ms
<10ms
Tolerances
Pickup thresholds
Current
Current (symmetrical
components)
Voltage
Voltage (symmetrical
components)
Power
Power factor
Frequency
Rate-of-frequency change
Times
3%ofsettingvalueor75mA
1)
4 % of setting value or 100 mA
1)
3 % of setting value or 0.2 V
4 % of setting value or 0.2 V
3 % of setting value or 0.5 W
(for rated values)
3 degrees
15 mHz
5%ofsettingvalueor0.05Hz/s
1%ofsettingvalueor10ms
Additional functions
Operational measured values
Currents
I
A(L1)
, I
B(L2)
, I
C(L3)
Positive-sequence component I
1
Negative-sequence component I
2
I
E
or 3I
0
In A (kA) primary,
in A secondary or in % I
nom
Range
Tolerance*)
10 to 150 % I
nom
1.5 % of measured value or 1 % I
nom
and from 151 to 200 % I
nom
3 % of measured value
Voltages
Phase-to-ground voltages
V
A-N
, V
B-N
, V
C-N
Phase-to-phase voltages
V
A-B
, V
B-C
, V
C-A
, V
SYN
V
N
, Vp
h-N
, V
x
or V
0
Positive-sequence component V
1
Negative-sequence component V
2
In kV primary, in V secondary
or in % V
nom
Range
Tolerance*)
10 to 120 % of V
nom
1%ofmeasuredvalueor0.5%ofV
nom
S, apparent power In kVAr (MVAr or GVAr) primary
and in % of S
nom
Range
Tolerance*)
0 to 120 % of S
nom
1.5 % of S
nom
for V/V
nom
and I/I
nom
= 50 to 120 %
P, active power With sign, total and phase-segregated in
kW (MW or GW) primary and in % S
nom
Range
Tolerance*)
0 to 120 % of S
nom
2%ofS
nom
for V/V
nom
and I/I
nom
= 50 to 120 %
and ⏐cos ϕ⏐ = 0.707 to 1 with
S
nom
=
3 ⋅⋅VI
nom nom
Q, reactive power With sign, total and phase-segregated
inkVAr(MVArorGVAr)primary
and in % of S
nom
Range
Tolerance*)
0 to 120 % of S
nom
2%ofS
nom
for V/V
nom
and I/I
nom
= 50 to 120 %
and ⏐sin ϕ⏐ = 0.707 to 1 with
S
nom
=
3 ⋅⋅VI
nom nom
cos ϕ, power factor (p.f.) Total and phase-segregated
Range
Tolerance*)
–1 to +1
3%for⏐cos ϕ⏐≥0.707
Frequency f In Hz
Range
Tolerance*)
f
nom
± 5Hz
20 mHz
Temperature overload protection
Θ/Θ
Trip
In %
Range
Tolerance*)
0 to 400 %
5 % class accuracy per IEC 60255-8
Temperature restart inhibit
Θ
L
/Θ
LTrip
In %
Range
Tolerance*)
0 to 400 %
5 % class accuracy per IEC 60255-8
Restart threshold Θ
Restart
/Θ
LTrip
In %
Inhibit time T
Reclose
In min
Currents of sensitive ground-fault
detection (total, active, and reactive
current) I
Ns
, I
Ns active
, I
Ns reactive
;
(I
EE
, I
EE active
, I
EE reactive
)
In A (kA) primary and in mA
secondary
Range
Tolerance*)
0 mA to 8000 mA for I
nom
=5A
1)
3 % of measured value or 1 mA
*) With rated frequency.
1) At I
nom
= 1 A, all limits divided by 5.