1. Introduction
This manual provides comprehensive instructions for the installation, operation, and maintenance of the RWRAPS W2R series Mini ATS Dual Power Automatic Transfer Switch, specifically for the 2P 100A, 110V model. This device is designed to automatically switch between a normal power supply and a backup power supply, ensuring continuous and reliable power for household applications.
The W2R series ATS is a PC level micro household power transfer switch. When the normal city power supply becomes abnormal, the backup power source is activated immediately, preventing interruptions and maintaining power supply continuity, reliability, and safety.
2. Safety Information
WARNING: Electrical installation and maintenance should only be performed by qualified personnel. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Always disconnect power before installing or servicing the device.
- Ensure that the rated voltage of both common and backup power supplies is within the range of 85%-110% of the device's specified voltage.
- The current should not be less than 5A; otherwise, the coil may overheat or spontaneously combust.
- If your local voltage is unstable, consider adding voltage protectors to the system.
- Do not operate the switch in a manual position unless specifically instructed for maintenance or testing.
- Ensure all connections are secure and properly insulated.
3. Product Overview
The RWRAPS W2R-100 II Automatic Transfer Switch is designed for reliability and ease of use. Key features include:
- Silver Contacts: Enhances conductivity and extends product lifespan.
- Automatic Operation: Seamlessly switches between power sources.
- Built-in Signal Output: Provides an opening signal port for connection to an indicator light, allowing convenient observation of status outside the cabinet.
- Robust Construction: Features good insulation, high-temperature resistance, and anti-aging properties for safe and reliable operation.
- DIN Rail Mounting: Designed for easy installation on standard DIN rails.
Figure 3.1: Front view of the RWRAPS W2R-100 II Automatic Transfer Switch, showing the manual/auto switch, indicator lights, and terminal blocks for power sources A and B.
4. Specifications
| Feature | Specification |
|---|---|
| Model | W2R-100 II |
| Operation Mode | Automatic |
| Current Rating | 100 Amps |
| Operating Voltage | 110 Volts AC (50/60Hz) |
| Contact Type | Normally Open |
| Connector Type | Din Rail Screw Terminals |
| Mounting Type | DIN Rail |
| Circuit Type | 2-way |
| Contact Material | Silver |
| Item Weight | 2.2 pounds (approximately 1 kg) |
5. Setup and Installation
Follow these steps for proper installation of your RWRAPS W2R-100 II Automatic Transfer Switch. Ensure all power sources are disconnected before beginning.
5.1 Mounting
- Select a suitable location within your electrical panel or enclosure that allows for proper ventilation and access for wiring.
- Mount the Automatic Transfer Switch onto a standard DIN rail. Ensure it is securely fastened.
5.2 Wiring Diagram and Connections
Refer to the wiring diagram below for correct connection of the common power supply (Source A), backup power supply (Source B), and load output.
Figure 5.1: Wiring diagram illustrating connections for common power supply (Source A), backup power supply (Source B), and load output for a 2-pole configuration.
- Common Power Supply (Source A): Connect the main utility power to the terminals labeled "Source A". Ensure correct polarity (L for Live, N for Neutral).
- Backup Power Supply (Source B): Connect your generator or other backup power source to the terminals labeled "Source B". Ensure correct polarity.
- Load Output: Connect the electrical load (e.g., household circuits) to the terminals labeled "Load output".
- Control Lines: Connect the common control line (L and N) for Source A and the alternate control line for Source B as indicated in the diagram.
- Signal Indicator (Optional): If desired, connect an external signal indicator light to the built-in regular standby opening signal output port for remote status monitoring.
After all connections are made, double-check for tightness and correct wiring before restoring power.
6. Operating Instructions
The RWRAPS W2R-100 II ATS offers both automatic and manual operation modes.
6.1 Mode Selection
Locate the switch on the front panel labeled "Manual" and "Auto".
- Auto Mode: For normal operation, set the switch to "Auto". In this mode, the device will automatically detect the availability of the common power supply (Source A) and switch to the backup power supply (Source B) if Source A fails. It will automatically switch back to Source A when it is restored.
- Manual Mode: The "Manual" position is primarily for testing or emergency situations where manual intervention is required. Note: Manual operation must be performed carefully and only when necessary. Ensure the device is in the "Manual" position before attempting to manually switch between sources.
6.2 Indicator Lights
The device features indicator lights (typically labeled A and B) to show which power source is currently active.
- An illuminated indicator for "A" signifies that the common power supply (Source A) is active.
- An illuminated indicator for "B" signifies that the backup power supply (Source B) is active.
7. Maintenance
The RWRAPS W2R-100 II Automatic Transfer Switch is designed for minimal maintenance. However, periodic checks are recommended to ensure optimal performance and safety.
- Visual Inspection: Periodically inspect the device for any signs of physical damage, loose connections, or discoloration.
- Terminal Tightness: Ensure all screw terminals remain tight. Loose connections can lead to overheating and potential hazards.
- Cleaning: If necessary, gently clean the exterior of the device with a dry, soft cloth. Do not use liquid cleaners or solvents.
- Functional Test: It is advisable to periodically test the automatic transfer function by temporarily disconnecting the main power supply (Source A) to ensure the switch correctly transfers to the backup power supply (Source B) and back when Source A is restored.
CAUTION: Always disconnect power to the device before performing any maintenance or inspection that involves touching internal components or wiring.
8. Troubleshooting
If you encounter issues with your Automatic Transfer Switch, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not switch automatically. |
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| Coil overheating or burning smell. |
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| No power to load. |
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If the problem persists after attempting these solutions, please contact RWRAPS customer support.
9. Warranty and Support
For warranty information and customer support, please refer to the documentation provided with your purchase or visit the official RWRAPS website. Keep your purchase receipt as proof of purchase.
For technical assistance or inquiries, please contact your retailer or the manufacturer directly.
