PFW03 / PFWD01, CTSW, CWBC reactive power controllers, thyristor switches and capacitor contactors
Country: Brazil · Model: PFW03 / PFWD01, CTSW, CWBC
A set for controlling capacitor steps in low-voltage reactive power compensation units. It includes PFW03 controllers for 8, 12 or 24 steps, the dynamic PFWD01, CTSW thyristor switches for 15, 25 or 50 kvar and CWBC9…CWBC125 contactors.
- PFW03 — number of steps
- 8, 12 or 24
- PFW03 — measurement
- single-phase (M8, M12, M24) or three-phase (T12, T24)
- PFW03 — dimensions
- 96 × 96 × 80 mm (M8); 144 × 144 × 75 mm
- PFW03 — harmonics
- up to the 51st
Technical specifications
| PFW03 — number of steps | 8, 12 or 24 |
|---|---|
| PFW03 — measurement | single-phase (M8, M12, M24) or three-phase (T12, T24) |
| PFW03 — dimensions | 96 × 96 × 80 mm (M8); 144 × 144 × 75 mm |
| PFW03 — harmonics | up to the 51st |
| PFWD01 — steps / speed | 12 dynamic steps, 25 switchings per second |
| PFWD01 — cos φ range | 0.8 ind. … 0.8 cap. |
| CTSW — voltage / power | 220, 400, 440, 480, 690 V; 15, 25, 50 kvar |
| CWBC — sizes | CWBC9 … CWBC125 |
| CWBC — insulation | Ui 690 V, Uimp 6 kV |
| Communication | RS485, Modbus-RTU (PFW03, PFWD01) |
| Standards | IEC 61010-1, IEC 61000-4 (PFWD01); IEC 60947-4-3 (CTSW); IEC/EN 60947-1, -4-1, -5-1, UL (CWBC) |
Specifications are taken from the manufacturer’s technical documentation. Updated .
Description
PFW03 monitors reactive power and cos φ and switches capacitor and reactor steps. Models M8, M12 and M24 measure one phase, T12 and T24 three. The enclosure is 96 × 96 × 80 mm or 144 × 144 × 75 mm, the front panel is IP40 (IP66 with a silicone membrane), harmonics are analysed up to the 51st, and communication goes through RS485 with Modbus-RTU. The current inputs withstand an overload of 100 A for 1 s. PFWD01 is intended for welding, cranes, presses and rolling mills, performs up to 25 switchings per second in the cos φ range from 0.8 ind. to 0.8 cap., the panel is IP54, and the supply is 400 or 230 V. CTSW switches turn the capacitor on at the voltage zero crossing, so there is no inrush current.
How to choose
For a slowly changing load take PFW03 with CWBC contactors, for a fast-changing one PFWD01 with CTSW switches for 220, 400, 440, 480 or 690 V. Capacitors for CTSW must discharge through resistors. Look for the capacitors themselves among the UCWT, UCW and BCW series. Capacitors for CTSW comply with IEC 60947-4-3, and CWBC contactors with IEC/EN 60947-1, -4-1, -5-1 and UL.
Request a price and lead time
PFW03 / PFWD01, CTSW, CWBC reactive power controllers, thyristor switches and capacitor contactors. We reply within one business day.
Or email office@usk.ua or call +38 (044) 339-50-20.
FAQ
How does PFWD01 differ from PFW03?
PFW03 controls 8, 12 or 24 steps, while PFWD01 has 12 dynamic steps and up to 25 switchings per second, so it is suitable for fast-changing loads.
Why use a CTSW thyristor switch instead of a contactor?
The switch operates in milliseconds, while discharging the capacitors in an ordinary scheme takes 30–90 s. Switching at voltage zero gives no current surges.
What operating conditions do CWBC contactors have?
Temperature from −25 to +55 °C, altitude up to 3000 m, up to 120 operations per hour. Mechanical endurance is 1 million cycles, electrical endurance in category AC-6b is 0.1 million.
What insulation do CWBC contactors have?
The rated insulation voltage Ui is 690 V, the impulse voltage Uimp is 6 kV. The contactors have a block of leading contacts with pre-insertion resistors.
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