Instructions

PM 1002308 000 00 Summation current transformer SIRAX CT6xx line 9/12
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.