Three-Phase Intelligent Digital SCR Power Regulator

SCR - [1] [2] [3] [4] [5] [6] [7]

Example 1: SCR-7-3628-MM — 7 Series, 3-phase, 60A, 220VAC auxiliary power, 4-20mA input, with over-temperature alarm, with RS-485 Modbus RTU communication.

Example 2: SCR-7-3128-NN — 7 Series, 3-phase 4-wire system, 100A, 220VAC auxiliary power, 4-20mA input, without alarm, without RS-485 communication.

Important Notes:

• This SCR is compatible with resistive loads only. Capacitive loads are not suitable.
• In a Star configuration with a 3-phase 4-wire system, the neutral wire CANNOT be connected to the system; the 3 phases must be balanced.
• A fast fuse rated at 1.5× the actual load current must be installed to protect the SCR from overload.
• Silicon rubber pad or silicon compound must be applied to the bottom of the SCR to aid heat radiation.
• When calculating the required SCR rating, use twice the actual phase current as the minimum SCR rating.

Click below link to download catalog for SCR-7 Power Regulator

Catalog -(SCR-7)

This video demonstrates a test we did on Maxwell SCR 3 phase power regulator The instruments you are able to see right away is an oscilloscope which shows the square wave of the load, the one our test engineer holds on hand is a standard signal generator which generates 4-20mA standard input signals, we feed the SCR with a small input and gradually increase the input, as you can see from the video, The lights in the video turned brighter as the input increase. And the 3 voltage meter shows the voltage of each phase, Voltage of each phase increases from 0V to somewhere close to 380Vac, other features like soft-start, minimum and maximum output, manual control, over temperature protections are also available with this SCR. RS-485 Modbus communication are also available

The SCR-7 series intelligent power regulator is specifically designed for high-precision temperature control in industrial heating applications. Its robust design, digital interface, and RS-485 communication capability make it an ideal choice for a wide range of demanding industrial environments. The unit is particularly well-suited for applications requiring smooth, surge-free power delivery, where the soft start function and configurable output limits provide critical protection for sensitive heating elements.

• Industrial furnaces, kilns, and high-temperature ovens
• Plastic extrusion and injection molding heating zones
• Glass and ceramics manufacturing processes
• Environmental test chambers and temperature cycling systems
• HVAC and industrial heating systems with centralized control
• Chemical processing and reactor temperature regulation
• Food processing and drying equipment
• Semiconductor and electronics manufacturing clean-room heating
• Infrared heating systems and radiant heater control
• Automated factory heating networks with PLC/SCADA integration