A. Product Overview

The Autonics SPR3-4150TFF 150 A 440 VAC Three Phase Power Controller is designed to regulate the amount of electrical power supplied to three phase industrial loads.

It is particularly suitable for applications where precise heater power control is required instead of simply switching the load fully ON or OFF.

The SPR3-4150TFF supports multiple control methods including phase control, fixed cycle control and ON OFF control. It also provides advanced feedback control modes for maintaining constant current, constant voltage or constant power.

The controller accepts common industrial control signals such as DC 4 to 20 mA and 1 to 5 VDC, allowing it to work with temperature controllers, PLCs and other automation equipment.

Key Features

• Brand: Autonics

• Model: SPR3-4150TFF

• Series: SPR3

• Product type: Three phase power controller

• Control phase: Three phase

• Rated load voltage: 440 VAC

• Rated load current: 150 A

• Minimum load current: 1 A

• Power supply: 100 to 240 VAC, 50 or 60 Hz

• Analog control input: DC 4 to 20 mA

• Voltage control input: 1 to 5 VDC

• Contact input: ON OFF no voltage contact

• Pulse voltage input: 5 to 12 VDC

• Manual control: External 10 kilo ohm adjuster

• Display: 3 digit 7 segment LED

• Phase control

• Fixed cycle control

• ON OFF control

• Constant current feedback control

• Constant voltage feedback control

• Constant power feedback control

• RS485 communication

• Communication protocol: Modbus RTU

• Maximum RS485 connection: 31 units

• RUN and STOP digital input

• AUTO and MANUAL selection

• RESET input

• Alarm output

• Soft start function

• Soft up and soft down functions

• Output high and low limit

• Output monitoring

• Forced air cooling

• Operating temperature: Minus 10°C to 55°C

B. Working Principle

The Autonics SPR3-4150TFF power controller regulates the electrical power supplied from a three phase AC source to an industrial load.

Instead of allowing the load to receive full electrical power continuously, the controller adjusts how much power reaches the load according to the incoming control signal.

For example, a temperature controller can send a 4 to 20 mA signal to the SPR3-4150TFF.

A lower control signal commands lower heater power, while a higher control signal commands greater heater power.

The SPR3-4150TFF can regulate output using different control methods.

Phase Control

Phase control adjusts the portion of each AC waveform supplied to the load.

This provides smooth and precise power regulation and is useful where accurate heater control is required.

Cycle Control

Cycle control switches complete AC cycles ON and OFF according to the required output percentage.

This method is commonly used with resistive heating loads.

ON OFF Control

The controller can also operate by switching the output completely ON or OFF according to the control command.

Feedback Control

The SPR3-4150TFF supports advanced feedback operation including:

• Constant current control

• Constant voltage control

• Constant power control

These modes allow the controller to compensate for changes in the load or supply conditions and maintain more stable output.

C. Why Is the Autonics SPR3-4150TFF Used?

The Autonics SPR3-4150TFF is used when an industrial process requires accurate and controlled delivery of electrical power to a three phase load.

1. Precise Heater Power Control

It allows heater power to be adjusted gradually instead of simply switching the heater fully ON or OFF.

2. Temperature Control Applications

The controller can receive a 4 to 20 mA or 1 to 5 VDC signal from a temperature controller and regulate heater power accordingly.

3. Industrial Furnace Control

It can be used to regulate heating elements in industrial furnaces requiring controlled three phase power.

4. Oven Heating Control

Industrial drying, curing and heating ovens can use the controller for accurate heater output regulation.

5. Constant Current Control

The controller can maintain more stable current even when operating conditions change.

6. Constant Voltage Control

Voltage feedback can be used where maintaining stable load voltage is important.

7. Constant Power Control

Constant power feedback helps maintain stable heating power when load resistance changes.

8. Soft Start Operation

Soft start gradually increases the output instead of immediately applying full power.

This can reduce electrical and thermal stress on heaters and connected equipment.

9. PLC and Automation Integration

The controller can be integrated with PLCs, temperature controllers and supervisory automation systems.

10. RS485 Modbus Communication

RS485 Modbus RTU communication allows operating parameters and controller information to be integrated into an industrial monitoring or automation network.

11. Alarm Monitoring

The controller provides alarms for abnormal operating conditions, helping maintenance personnel identify problems quickly.

12. High Current Three Phase Loads

With a rated load current of 150 A, the SPR3-4150TFF is suitable for relatively high power industrial heating applications.

D. Suitable Buyers

The Autonics SPR3-4150TFF Three Phase Power Controller is suitable for:

• Industrial furnace manufacturers

• Oven manufacturers

• Heater manufacturers

• Industrial automation companies

• Control panel manufacturers

• OEM machine builders

• PLC system integrators

• Temperature control system manufacturers

• Heat treatment equipment manufacturers

• Plastic machinery manufacturers

• Extrusion machine manufacturers

• Injection molding machine manufacturers

• Semiconductor equipment manufacturers

• Packaging machinery manufacturers

• Drying equipment manufacturers

• Ceramic industries

• Glass industries

• Metal heat treatment plants

• Pharmaceutical equipment manufacturers

• Food processing equipment manufacturers

• Factory maintenance departments

• Process automation companies

• Electrical panel builders

• Industrial heating system integrators

It is especially relevant for buyers searching for a 150 A power controller, 440 VAC power controller, three phase SCR power controller, thyristor power controller, industrial heater controller or Autonics SPR3 power controller.

FAQ

1. What is the Autonics SPR3-4150TFF?

The Autonics SPR3-4150TFF is a three phase industrial power controller designed to regulate electrical power supplied to heaters and other compatible industrial loads.

2. What is the rated load current of the SPR3-4150TFF?

The rated load current is 150 A.

3. What is the rated load voltage?

The rated load voltage is 440 VAC.

4. Is the SPR3-4150TFF a three phase power controller?

Yes. It is specifically designed for three phase power control.

5. What power supply does the controller require?

The controller power supply is 100 to 240 VAC at 50 or 60 Hz.

6. What control input signals are supported?

The SPR3-4150TFF supports several control inputs including:

• DC 4 to 20 mA

• 1 to 5 VDC

• ON OFF no voltage contact

• 5 to 12 VDC pulse input

• Manual adjustment

7. Can it accept a 4 to 20 mA signal?

Yes. DC 4 to 20 mA is supported as an automatic control input.

8. Can the SPR3-4150TFF be connected to a temperature controller?

Yes. A compatible temperature controller can provide a control signal to regulate the output of the power controller.

9. Does it support phase control?

Yes. Phase control is one of the main control methods supported by the SPR3-4150TFF.

10. Does it support cycle control?

Yes. It supports fixed cycle control for suitable resistive loads.

11. Does it support ON OFF control?

Yes. ON OFF power control is supported.