KULUN / SCR Power Controller

APR3S Three-phase SCR Power Controller (Compact)

Name: APR3S Three-phase SCR Power Controller (Compact)
Brand: KULUN

KULUN APR3S: compact three-phase SCR power controller for space-limited heating cabinetry, industrial and vacuum furnaces and material heating.

Output Voltage Range0–100% of mains input voltage

Output Current RangeAC 10–50 A

产品特征

Three output modes: phase-shift, zero-crossing fixed-cycle and zero-crossing variable-cycle
Three closed-loop modes: constant voltage, constant current and constant power (also effective in zero-crossing mode)
Optional built-in temperature PID closed-loop control
True RMS measurement as standard
LCD display; operating panel can be mounted remotely on the cabinet door
Optional built-in TCP Ethernet communication

Input	Mains supply	Three-phase AC 260–440 V, 40–65 Hz
Input	Control supply	AC 85–265 V, 50/60 Hz
Output	Output voltage	0–100.0% of mains input voltage
Output	Output current	AC 10–50 A
Performance	Control stability	Better than 0.2%
Performance	Control accuracy	Better than 0.5%
Key features	Closed-loop mode	Open loop, constant current, constant voltage or constant power, selectable
	Firing mode	Phase-shift, zero-crossing fixed-cycle, zero-crossing variable-cycle
	Setpoint signal	Analog, keypad digital or communication setpoint, selectable
	Inputs	2 analog inputs, 2 digital inputs
	Outputs	1 relay output, NO contact, AC 240 V/3 A, DC 24 V/5 A
	Communication	Modbus RTU/TCP, PROFIBUS, PROFINET
	Power sharing	Intelligent power sharing across up to 40 units
	Temperature PID loop	8-segment temperature profile; smart PID, fuzzy PID or standard PID; AT auto-tuning
Protection	Mains fault	Protection on mains frequency out of range, undervoltage or input phase loss
	Load aging	Protection on load aging fault
	Overheating	Protection when thyristor temperature > 85 °C
	Overcurrent	Protection when output current reaches the set multiple
	Load break	Protection when load current falls below the threshold setting

For space-limited three-phase electric heating cabinets, modular equipment and integrated temperature control units.

For three-phase heating loops in small industrial furnaces, vacuum furnaces, material heating and test equipment.

For equipment retrofits or OEM integration; capacity and installation space confirmed on site.

What is the main difference between APR3S and APR3?

APR3S targets compact three-phase installations; functions, capacity and expansion depend on the actual configuration.

What to confirm when space is limited?

Provide cabinet dimensions, mounting orientation, ventilation, ambient temperature and cable entry.

Is it suitable for vacuum or small industrial furnaces?

Yes for three-phase electric heating; verify load current, zone count, control signal and continuous-duty requirements.

Which setpoint methods are available?

Analog, keypad digital or communication setpoint, depending on configuration.

Is separate cooling required?

Determine ventilation and cooling from load current, duty time, cabinet temperature rise and ambient temperature.

请提供应用行业、设备工况、电压电流、功率范围和现场环境，工程师将协助确认方案。