Product Overview
JTY300 series is a full‑digital SCR power controller covering single‑phase and three‑phase applications. Main‑circuit voltage ranges from AC 100 V up to 1140 V. Built‑in 24‑bit AD chip supports optional true‑RMS measurement for real‑time voltage, current and active‑power acquisition.
Equipped with digital phase‑locked‑loop plus Fourier algorithm for outstanding noise immunity under severe industrial interference. It supports multiple load connection configurations including star‑connection (neutral‑connected / neutral‑isolated) and delta‑connection. It integrates soft‑start, soft‑stop, phase‑loss protection, SCR over‑temperature detection and emergency stop functions. Optional RS485 Modbus‑RTU communication and analog re‑transmission output are available.
Adaptive mains frequency from 47 Hz to 63 Hz enables stable operation with generator power supplies. It works for resistive heating, rectification, electroplating and field‑excitation control scenarios, for new‑machine integration as well as legacy‑equipment retrofits.
Core Product Highlights
⚡Wide‑range single‑phase & three‑phase compatibility
Three‑phase main‑circuit: AC 100‑690 V; Single‑phase main‑circuit: AC 100‑1140 V
Supports star‑load (neutral‑connected / neutral‑isolated), delta‑load, two‑leg three‑phase control modes
Adaptive grid frequency 47‑63 Hz, compatible with generator‑supplied power systems
⚡Multi‑mode power regulation
Phase‑angle voltage regulation, zero‑cross burst‑firing, constant‑current, constant‑voltage and constant‑power control are selectable. Suited for resistive heating, rectification, electroplating and excitation‑control loads. Zero‑cross firing mode generates minimal harmonic distortion for grid‑friendly operation.
⚡Adjustable soft‑start & soft‑stop protection
Power‑on soft‑start time configurable 0‑400 seconds, soft‑stop time 0‑60 seconds. Effectively suppresses inrush current upon power‑on, protects heating elements and power‑grid equipment and extends service life of thermal components.
⚡High‑precision measurement & multi‑layer fault protection
24‑bit high‑resolution AD sampling; optional true‑RMS measurement for voltage, current and power. Comprehensive protection covers heatsink over‑temperature, phase loss, over‑voltage, over‑current and load‑break detection. Passive relay alarm contacts (NO + NC) provide interlock and external alarming. Stores up to 10 historical fault records for troubleshooting.
⚡Flexible signal I/O options
Analog setpoint inputs: 0‑20 mA, 4‑20 mA, 0‑10 mA, 0‑5 V, 0‑10 V, 1‑5 V, 2‑10 V and external potentiometer manual adjustment. Optional DA re‑transmission output mirrors voltage/current/power via standard analog signals. Manual‑Auto switch supports convenient on‑site commissioning.
⚡Modbus‑RTU communication for system integration
Optional RS485 Modbus‑RTU interface. Supports read/write of parameters, runtime status and fault codes. Seamlessly connects to carbon‑potential controllers, PLC and SCADA host software for remote monitoring, parameter downloading and centralized automation management.
⚡Local HMI for on‑site operation
Onboard display and touch keys for local parameter configuration. Real‑time readout of voltage, current, power and alarm codes. Historical fault log query accelerates on‑site diagnosis and maintenance.
Interface & Wiring Description
【Image: terminal block diagram】
Analog setpoint input (C1/C2‑Gnd): Accepts standard mA / V control signals
Manual‑Auto switch: External toggle switch plus 10 kΩ potentiometer for local manual debugging
RS485 communication (A+, B‑): Modbus‑RTU, optional feature
DA re‑transmission output (DA+, DA‑): Optional analog mirror output for voltage/current/power
Alarm relay output (ANO / ACOM / ANC): Passive NO + NC contacts for fault interlock & alarm
Controller power supply: Default AC 85‑260 V; AC 380 V / DC24 V optional
Main‑circuit power terminals: Connect to mains and heating loads, supporting star / delta three‑phase wiring topologies.
Note: When operating in three‑phase star‑connection with neutral, neutral conductor current capacity must reach ≥ 1.5 × phase‑conductor rated current.
Typical Application Scenarios
✅ Heat‑treatment industry: Well‑type furnaces, chamber furnaces, carburizing furnaces, ovens, matched with carbon‑potential controllers for closed‑loop heating power regulation
✅ Industrial electric heating: Infrared heating, duct heaters, high‑power resistance heating systems
✅ Special‑process power control: Rectifier power supplies, electroplating power sources, motor excitation control
✅ Generator‑powered sites: Work reliably under unstable generator‑supplied mains (47‑63 Hz adaptive frequency)
✅ Legacy‑equipment retrofitting: Upgrade old‑style power regulators for higher stability and communication capability
Main Technical Specifications
| Item | Specification |
|---|---|
| Model | JTY300 Series SCR Power Controller |
| Main‑circuit Voltage | 3‑Phase: AC 100‑690 V; Single‑phase: AC 100‑1140 V |
| Control Power Supply | Default AC 85‑260 V; optional AC 380 V / DC24 V |
| Frequency Adaptation | 47 Hz‑63 Hz (generator‑grid compatible) |
| Control Modes | Phase‑angle voltage regulation / Zero‑cross burst‑firing; Constant‑current / Constant‑voltage / Constant‑power control |
| Analog Setpoint Input | 0‑20 mA, 4‑20 mA, 0‑10 mA, 0‑5 V, 0‑10 V, 1‑5 V, 2‑10 V; potentiometer manual mode |
| Soft‑Start Time | 0‑400 s adjustable |
| Soft‑Stop Time | 0‑60 s adjustable |
| Measurement | 24‑bit AD sampling; optional True‑RMS for voltage, current, active‑power |
| Protection Functions | Heatsink over‑temperature, 3‑phase phase‑loss, over‑voltage, over‑current, load‑break detection |
| Alarm Output | Passive relay contacts (NO + NC); stores up to 10 historical fault records |
| Communication (Optional) | RS485 Modbus‑RTU protocol |
| Re‑transmission Output (Optional) | 0‑20 mA,4‑20 mA,0‑5 V,0‑10 V,1‑5 V,2‑10 V |
| Human‑Machine Interface | Onboard display & touch keys for local parameter setup & fault query |
| Cooling | Forced air cooling with built‑in cooling fan |
Ordering Code Explanation (Simplified)
JTY300‑[PH‑Code]‑[Input‑Signal]‑[Rated‑Current]‑[Wiring‑Mode]‑[Options]‑[Main‑Voltage]‑[Frequency]‑[Control‑Supply]‑[Control‑Mode]‑[Soft‑Start‑Time]‑[Retrans‑Signal]‑[Custom]
PH‑Code: 1PH = single‑phase; 3PH = three‑phase
Rated‑Current: 30A / 50A / 100A / 280A / 450A / 750A / 1000A / 3000A
Options: S2 = RS485 communication; DA = analog re‑transmission output
Example: JTY300‑3PH‑4MA20‑100A‑3D‑S2‑380‑50‑220‑P‑20‑4MA20‑XXX 3‑phase, 4‑20 mA input, rated 100 A, 3‑leg control, with RS485, main‑circuit 380 V, 50 Hz, control supply AC220V, constant‑power mode, soft‑start 20 s, 4‑20 mA re‑transmission output.
Solution Advantages
Full‑digital domestic design: Short delivery lead‑time, local technical support and fast after‑sales response.
Wide‑voltage & wide‑frequency adaptability: Works for standard mains as well as generator‑powered field sites. Multiple three‑phase load‑connection modes reduce engineering‑design constraints.
Complete multi‑dimension protection: Soft‑start/soft‑stop plus phase‑loss, over‑temperature, over‑current and load‑break protection lower failure risk for heating loads. Historical fault logging simplifies maintenance.
Seamless integration for heat‑treatment systems: Compatible with carbon‑potential controllers and PLCs, forming complete closed‑loop atmosphere‑control systems for carburizing furnaces.
Flexible I/O configuration: Optional Modbus‑RTU and analog re‑transmission output support centralized SCADA monitoring to satisfy industrial traceability requirements.
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