Wenzhou Kinee Electrical Co., Ltd. is one of the most reliable manufacturers and suppliers of automatic transfer switch 3 way /4 way in China. We warmly welcome you to wholesale automatic transfer switch 3 way /4 way for sale here from our factory. All customized products are with high quality and competitive price.
Product Introduction
The automatic transfer switch 3 way/4 way,Suitable for multiple power sources such as mains electricity, photovoltaic power, and generators, and supports both DIN-rail and wall-mounted installation methods. Its core functions include: complete isolation of neutral and live wires to safely disconnect loads; real-time display of current, voltage, and phase; overvoltage, undervoltage, and overcurrent protection, with adjustable thresholds according to the usage environment; automatic or manual switching between multiple power sources, along with a priority phase sequence selection function; in addition, it offers a timed on/off function and a fault buzzer alarm tone.
Technical Parameters
| Rated supply voltage | AC 3*220V/4*220V | Mechanical life | 10⁶ |
| Operating voltage range | AC 80-300V | Protection class | IP20 |
| Rated frequency | 40-70Hz | Pollution degree | 3 |
| Hysteresis |
Overvoltage:5V Undervoltage:5V |
Altitude | ＜2000m |
| Measurement accuracy | 0.5 class | Operating temperature | -5℃~40℃ |
| Rated insulation voltage | 450V | Humidity | ≤50% or 40℃ |
| Output contact | 1NO 1NC | Storage temperature | -10℃~55℃ |
| Electrical life | 10⁵ | Product size | - |
Typical Application Scenarios
| No. | Application Scenario | Connection / Composition | Purpose / Advantage / Typical Use Case |
| 1 | ATS + PLC (Industrial/Engineering) | ATS dry contact → PLC DI input; PLC provides 24V | PLC records power failures and transfer timing, coordinates other devices (motors, fans, alarms); mandatory for factories and automation projects |
| 2 | ATS + Generator Controller | Utility power fails → ATS transfers + dry contact closes → generator starts | Safe signaling, no damage to control board; very common logic |
| 3 | ATS + Alarm / Indicator Light | Dry contact → audible/visual alarm or indicator light | Low-cost projects; typical scenarios: equipment rooms, pump rooms, agricultural power |
| 4 | ATS + Inverter / Energy Storage System | Dry contact signals power source status | Determines if grid parallel is allowed, prevents unintended parallel operation; popular with new energy customers |
| 5 | Remote Monitoring / BMS / EMS | Dry contact → data acquisition module → upload to platform | Standard for overseas projects, enables remote monitoring |
Electrical Symbol Diagram
Video
Questions and Answers
Q: When can I expect to receive a quote and detailed information after submitting an inquiry?
A: A reply will be sent within 24 hours.
Q: What makes you different from other suppliers?
A: We have a full range of electrical products and can also customize products to meet your specific needs.
Q: Do you provide samples? Are they free or extra?
A: Yes, we can provide samples free of charge, but we will not cover the shipping costs.
Q: Can I get a sample for testing before placing an order?
A: Of course!
Q: How's the delivery? I really need them urgently!
A: Samples require 5-7 days. Bulk orders require 12-15 days.
