Technical Guides · 2025-08-28
BSTY Three-Phase AC Power Regulator: Reliable Power Control for Industrial Applications
The BSTY Three-Phase AC Power Regulator is a reliable solution for industrial voltage control, supporting multiple input signals (0–5V, 0–10V, 4–20mA, potentiometer) and optional RS485 communication. With built-in soft-start, over-temperature protection, and complete isolation between control and power circuits, it ensures safe and stable operation. Designed for fans, pumps, torque motors, and heating equipment, the BSTY regulator combines flexible control, simple wiring, and robust protection for demanding industrial environments.
I. Product Overview
The BSTY series three-phase AC power regulator is designed for stable and accurate voltage control in industrial environments. With wide input compatibility, built-in protection, and flexible control options, it offers a reliable solution for powering resistive and inductive loads.
II. Key Features
- Wide input range: 100–450VAC (three-phase)
- Compatible with 0–5VDC, 0–10VDC, 4–20mA, or potentiometer control
- Optional RS485 communication module for PC/PLC remote control
- Built-in soft-start (2s) to reduce inrush current
- 85°C thermal protection with LED status indicators
- No phase sequence requirement for easy wiring
- Safe isolation between power and control circuits
III. Control Methods Explained
- Potentiometer (10K/2W) – Direct manual adjustment, powered internally by +5VDC
- 0–5VDC / 0–10VDC – Linear voltage signal control
- 4–20mA – Standard current loop control for automation systems
- RS485 Communication – Remote monitoring and control via computer or PLC (optional module)
IV. Application Scenarios
- Industrial fans, blowers, and pumps
- Torque motors where precise speed control is not critical
- Heating equipment and other resistive loads
- Automation systems requiring safe and isolated AC regulation
V. Technical Guidelines
- Load Sizing:
- Resistive load: Regulator current ≥ 2.5–3 × load rated current
- Inductive load: Regulator current ≥ 4–6 × load rated current - Protection: Use a fast fuse or breaker rated at 1.5 × load current
- Cooling:
- 10A: Heatsink required
- 40A: Forced air cooling or water cooling required
VI. Dimensions
- BSTY60–200A: 105 × 74 × 40 mm (Mounting: 92 × 48 mm)
- BSTY200–450A: 140 × 96 × 49 mm (Mounting: 125 × 80 mm)
(All models supplied with a transparent protective cover)
VII. FAQ
Q1: Can the BSTY regulate motor speed precisely?
A: No, it is only suitable for applications where exact motor speed is not required (e.g., fans, torque motors).
Q2: Does the regulator provide built-in overcurrent protection?
A: No, an external fast fuse or circuit breaker must be installed.
Q3: Is external power required for potentiometer control?
A: No, the regulator provides +5V internally to power the potentiometer.