20kW Three Phase Power Controller

Product catalog summary

Overview: The S3-20NV is a 20kW three-phase power controller designed by Power Products International Ltd for controlling resistive loads in electric furnaces and HVAC systems. It features zero crossover switching and burst pulse control to minimize electrical disturbances.

Specifications and Characteristics:

Type Number: S3-20NV
Total Rating: 20kW
Maximum Current: 28A
Supply Voltage: 415 Vac with a tolerance of -15% to +10%
Frequency: 50-60 Hz
Cooling: Natural air convection
Input Signal: 0-10 Vdc
Operating Temperature: -10°C to +40°C
Dimensions: 150mm x 150mm x 94mm
Compliance: CE Compliant, BSEN50178 Build Standard

Operation: The controller regulates resistive loads by switching them on and off in proportioned bursts based on a 0-10Vdc input signal. It uses burst fire zero-voltage switching for minimal RFI and harmonic distortion.

Installation: The controller should be installed with heatsink fins vertically and requires 100mm clearance for ventilation. Proper wiring and connection tightening are essential, and installation should be performed by a qualified electrician.

Safety: A safety device must disconnect the mains supply if overheating occurs. Suitable fuses should be used for cable protection, and ultra-fast fuses should be replaced with the same type.

Insulation Tests: Proper procedures must be followed to avoid damaging thyristors during insulation testing. Shorting line and load terminals can protect them from over-voltage.

Input Configuration: The controller accepts a 0-10Vdc input signal for proportional control, with internal and external semiconductor fuses as needed.

Catalog excerpts

S3-20NV 20kW Three Phase Power Controller The Spectral range of S3 thyristor power controllers are designed for the control of resistive loads in electric furnaces, and heater batteries in HVAC systems. The S3 series, like all Spectral controllers uses zero crossover switching, and burst pulse control ensures the load is switched only in multiples of complete mains half cycles thus keeping supply and electrical disturbance to a minimum and featuring variable frequency PWM for near infinite resolution. 0 – 10V Input Control 20kW Output PWM Control Zero Cross Over Switching Self Powered IP 20 Enclosure CE Compliant BSEN50178 Build Standard Specifications and Characteristics Type Number Total Rating (kW) Maximum Current rms (A) Losses (W) Supply Voltage (Vac) Frequency (Hz) Power Supply Controlled Arms Cooling Fuse Type Terminal mm2 Input Signal (Vdc) Input Impedance (ohms) Cycle Time (S) Isolation (V) Operating Temperature (0C) De rating Dimensions (mm) H W D Power Products International Ltd Commerce Way, Edenbridge, Kent T: 01732 866424 F: 01732 866399 [email protected]

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OPERATION This power controller is designed to regulate a resistive load by switching the load on and off in time proportioned bursts according to the incoming dc signal (Factory set 0-10Vdc). LOCATION Install power controller with heatsink fins in the vertical plane. Allow a minimum of 100mm clearance top and bottom. Control panels should have sufficient ventilation to maintain the ambient temperature through the thyristor unit to below 40 Degrees C to run unit to specified kW rating. SAFETY It is essential to fit a safety device that will disconnect the mains supply from the Spectral controller...

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Typical Single Phase Installation: L1 L3 THERMAL OVERLOAD SWITCH CONTACTOR SUPPLY INTERNAL SEMICONDUCTOR FUSES WHEN FITTED SPECTRAL CONTROLLER INPUT CONTROL EXTERNAL SEMICONDUCTOR FUSES WHEN REQUIRED HEATER BATTERY STAR OR DELTA CONNECTED Input Configuration: SIGNAL IN LOAD POWER IN LOAD LOAD Power Products International Ltd Commerce Way, Edenbridge, Kent T: 01732 866424 F: 01732 866399 [email protected]

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20kW Three Phase Power Controller

20kW Three Phase Power Controller

Catalog excerpts

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