PM 1002308 000 00
Summation current transformer SIRAX CT6xx line
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6. Technical specifications
SIRAX CT600
SIRAX CT610
Input
Primary current input
2...4 x 5A
5...8 x 5A
Dynamic short circuit current I
dyn
2.5 x I
th
Thermal short circuit current I
th
60 x I
pr
Nominal frequency
50 ... 60 Hz
Output
Secondary current
5 A
Class of accuracy
0.5
1
0.5
1
Rated burden
5; 10; 15; 20; 25 VA
Instrument security factor FS
FS5; FS10
Environmental conditions
Ambient temperature
-25 ... +40 °C
Storage temperature
-50 ... +80 °C
Safety
Overvoltage category
III
Degree of pollution
2
Test voltage
3 kV; 50 Hz; 1 min
Rated insulation level
0.72 kV
Insulation class
E (120 °C)
Body protection IP
IP20
Mechanical properties
Housing material
Polycarbonate
Flammability class
UL94 V-0, self-extinguishing, non-dripping, halogen-free
Dimensions (height / width / depth)
112.5 x 75 x 70 mm
112.5 x 150 x 70 mm
Connections
Connection
M4 screws with self lifting clamp strap
Maximum conductor cross section
∅
2,5 mm solid;
∅
1,5 mm flexibel
Standards
Standards accepted
IEC 61869-1; IEC 61869-2; IEC 60044-1
Calculation example
Main transformer ratio:
500 / 5A
400
/
5A
300 / 5A
Total current =
1200 / 5A
Burden - 1 Ammeter
Erforderliche aktive Leistung des Stromwandlers:
Ammeter
1.5
VA
Measurement conductor loss
1.5 VA
Consumption in summation CT
4.0 VA
Total
VA
7.0
VA
Der einzelne Stromwandler muss seinen VA-Anteil aus diesen 7.0 VA ziehen.
1. Current transformer 500 / 5A
(500 / 1200) x 7 = 2.92 VA + additional lesses
≈
3.75 VA*
2. Current transformer 400 / 5A
(400 / 1200) x 7 = 2.33 VA + additional lesses
≈
2.5 VA*
3. Current transformer 300 / 5A
(300 / 1200) x 7 = 1.75 VA + additional lesses
≈
2.5 VA*
* The VA values of the current transformer are to be rounded up to the corresponding values in our chart.
