General; Analog Inputs - Siemens SIPROTEC 7SD610 Manual

Technical Data

4.1 General

4.1 General
4.1.1

Analog Inputs

Nominal Frequency
Current inputs
Nominal current
Power consumption per phase and earth path
- at I = 1 A
Nom
- at I = 5 A
Nom
Current Path Loadability
- thermal (RMS)
- dynamic (pulse)
Requirements for current transformers
1. Condition:
for maximum fault current, current transformers
must not be saturated stationary
2. Condition:
The operational accuracy limit factor must at least be 30 or
a non-saturated period t'
AL
3. Condition:
Maximum ratio between primary currents of current transformers at
the ends of the protected object
Voltage inputs
Nominal voltage U
N
Measuring range
Power consumption per phase
Voltage overload capability per phase
- thermal (RMS)
322
f
N
I
N
1
of at least / must be ensured
4
At 100 V
50 Hz or 60 Hz
1 A or 5 A
Approx. 0.05 VA
Approx. 0.3 VA
500 A for 1 s
150 A for 10 s
4 · I continuous
N
1250 A (half-cycle)
n' ≥ 30
or
1
t' / AC cycle
≥
AL 4
80 V to 125 V (adjustable)
0 V to 218.5 V (rms)
≤ 0.1 VA
230 V continuous
C53000-G1176-C145-6, Release date 02.2011
(adjustable)
SIPROTEC, 7SD610, Manual