KULUN / SCR Power Controller

ST300 Single-phase SCR Power Controller (2-in 2-out)

Name: ST300 Single-phase SCR Power Controller (2-in 2-out)
Brand: KULUN

KULUN ST300: single-phase SCR power controller for kilns, vacuum coating, glass fiber and sapphire. Phase-shift, zero-crossing, constant V/I/P.

Output Voltage Range0–100% of mains input voltage

Output Current RangeAC 10–1500 A

产品特征

Two incoming lines on top, two outgoing lines at bottom — saves mains cabling and simplifies wiring
Optional built-in dual semiconductor fuses
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
True RMS measurement as standard
LED/OLED Chinese & English display; operating panel can be mounted remotely on the cabinet door

Input	Mains supply	Single-phase AC 110–440 V, 45–65 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 10–1500 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, 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 single-phase heating cabinets needing 2-in 2-out wiring, serving dual zones or dual branches.

For kilns, glass fiber, vacuum coating and industrial resistance heating equipment.

For high-current single-phase heating loops; configure cabling, fusing and cooling as a whole.

What does the 2-in 2-out structure do?

It simplifies dual-loop or dual-branch wiring; follow the electrical drawings and load configuration.

Are built-in semiconductor fuses available?

Yes by model and capacity; fuse rating must match the controller, load and short-circuit protection requirements.

Is it suitable for glass fiber and vacuum coating?

Yes for single-phase heating loops; confirm actual current, zones, control mode and process cycle.

What characterizes zero-crossing control?

It suits heating loads with high thermal inertia and reduces higher-harmonic impact.

Can it handle dual-zone control?

Yes per circuit requirements; zone independence, sensors and control logic should be fixed at the design stage.

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。