Description
What is Automatic Transfer Switch
- This microcomputer fast switching device, also known as High-Speed ATS and Automatic Transfer Switch, is newly developed on our latest embedded hardware and software platform, serving as a multifunctional ATS product tailored for metallurgy, petrochemical and other industrial scenarios.
- Safety: During switching, it tracks the voltage, frequency and phase of power sources on both sides of the circuit breaker in real time. Equipped with multiple reliable startup and switching modes, it realizes rapid and safe standby power supply switching without severe impact on motors.
- Flexibility: Conventional devices are custom-built for specific wiring and operating modes, requiring complicated modifications when working conditions or wiring schemes change. This device adapts to diverse on-site operating scenarios, and only partial parameter setting adjustments are needed to fit various engineering applications.
- High Speed & Precision: Adopting advanced DSP+ARM+CPLD hardware architecture and high-precision AD sampling chips, it ensures real-time data processing and rapid switching response.
- High Reliability: Dedicated anti-interference designs are applied to both hardware and software, together with comprehensive self-check and interlock logic. The device has passed top-grade third-party EMC tests, delivering outstanding anti-interference capability.
Features of the System
Full-range switching functions
- Multiple startup modes: manual, protection-initiated, undervoltage, false tripping, no-current and reverse power startup
- Parallel, series and simultaneous switching modes available
- Supports fast switching, synchronous capture switching, residual voltage switching and long-delay switching
- Complete switching interlock protection
Reliable hardware and software design
- Adopts fully enclosed back-plug structure with anti-interference design, greatly enhancing electromagnetic interference resistance.
- Equipped with interlock relay at outlet to ensure stable output action.
- Logic unit and management unit operate independently, avoiding interference to switching logic from communication and display functions.
Passed comprehensive third-party tests
- The device has attained the highest-level EMC certification, ensuring stable operation under harsh working conditions.
Communication Functions
- Supports Ethernet and RS485 interfaces, compatible with IEC60870-5-103, IEC61850 and Modbus protocols.
Powerful Fault Recording & Data Logging
- Comprehensive logs cover actions, alarms, switching status changes, self-check data, operating records and fault waveforms, enabling full operational status monitoring.
Clock Synchronization
- Equipped with software and hardware time synchronization functions.
Key Technical Specifications
Operating Environment
- Temperature: -25℃ ~ +60℃ for normal operation
- Humidity and pressure comply with DL478 standard
Mechanical Performance
- Withstands Class I severe vibration and shock response
Rated Parameters
- DC voltage: 220V, tolerance +15%, -20%
- AC voltage: 100V (line voltage), 57.74V
- AC current: 5A
- Frequency: 50Hz
Power Consumption
- AC voltage: less than 0.5VA per phase
- AC current: less than 1.0VA per phase (rated 5A); less than 0.5VA per phase (rated 1A)
- DC power: below 15W in normal operation; below 25W during tripping
Fault Recording
- Records 15 cycles before switching initiation and 235 cycles after initiation. Recording data conforms to COMTRADE99 standard.
Wiring Method of Automatic Transfer Switch
Single-mother segmentation method
The simplified wiring diagram of single busbar sectional connection is shown in Figure 1. Incoming lines 1 and 2 can be power supply equipment such as transmission lines, main transformers and line-transformer units.
Under normal operating conditions, Bus 1 is powered by Incoming Line 1 and Bus 2 by Incoming Line 2. Switches K1 and K2 stay closed while bus tie switch K0 remains open. The device will switch over to the alternate power supply once either incoming power fails.
Single-mother household
The wiring diagram of single busbar operation mode is shown in Figure 2.
In normal operation, the busbar is powered by either incoming line 1 or line 2. When powered by line 1, switch K1 closes and K2 opens, with line 2 acting as standby power supply. The device will start quickly and switch to line 2 power once line 1 power fails due to faults. The same logic applies when line 2 serves as the main power source.
List of Setting Parameters for Automatic Transfer Switches
| No. | Parameter Name | Range | Factory Default |
|---|---|---|---|
| 1 | Control Mode | Local / Remote | Local |
| 2 | Fault Switching Mode | Series / Simultaneous | Series |
| 3 | Manual Switching Mode | Parallel / Series | Series |
| 4 | K1→K2 Switch Initiation | Enable / Disable | Enable |
| 5 | K2→K1 Switch Initiation | Enable / Disable | Enable |
| 6 | K1→K0 Switch Initiation | Enable / Disable | Enable |
| 7 | K2→K0 Switch Initiation | Enable / Disable | Enable |
| 8 | K0→K1 Switch Initiation | Enable / Disable | Enable |
| 9 | K0→K2 Switch Initiation | Enable / Disable | Enable |
| 10 | Fast Switch Initiation | Enable / Disable | Enable |
| 11 | Synchronous Capture Switch Initiation | Enable / Disable | Enable |
| 12 | Residual Voltage Switch Initiation | Enable / Disable | Enable |
| 13 | Long-delay Switch Closing | Enable / Disable | Enable |
| 14 | Manual Initiation | Enable / Disable | Enable |
| 15 | Protection Initiation | Enable / Disable | Enable |
| 16 | False Tripping Initiation | Enable / Disable | Enable |
| 17 | Undervoltage Initiation | Enable / Disable | Enable |
| 18 | No-current Initiation | Enable / Disable | Enable |
| 19 | Reverse Power Initiation | Enable / Disable | Enable |
| 20 | Frequency-Voltage Initiation | Enable / Disable | Enable |
| 21 | Decoupling Protection Initiation | Enable / Disable | Enable |
| 22 | Undervoltage Incoming Line Detection | Enable / Disable | Enable |
| 23 | Directional Overcurrent Interlock | Enable / Disable | Enable |
| 24 | Output Interlock | Enable / Disable | Enable |
| 25 | PT Broken Wire Detection | Enable / Disable | Enable |
| 26 | Line Auto-recovery Function | Operation Mode Recovery / Switch Function Recovery / Disable | Disable |
FAQ
Q：What equipment is the generator automatic transfer switch mainly applied to, and what are its features?
A:
Applicable Equipment
This ATS automatic transfer switch is mainly applied to busbar, station service and standby power systems in industrial plants, and power stations.
Core Features
Instantly switch standby power to guarantee uninterrupted power supply for loads.
Multiple startup & switching modes fit various main wiring configurations.
High anti-interference performance and stable operation under harsh industrial conditions.
Comprehensive interlock protection avoids misoperation and fault spread.
Multiple startup & switching modes fit various main wiring configurations.
High anti-interference performance and stable operation under harsh industrial conditions.
Comprehensive interlock protection avoids misoperation and fault spread.
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