GEYA W2R-100 Dual Power Automatic Transfer Switch User Manual

1. Product Overview

The GEYA W2R-100 series Mini ATS is a PC level dual power automatic transfer switch designed for household and light commercial applications. It ensures uninterrupted power supply by automatically switching to a backup power source when the primary power source becomes abnormal. This device is suitable for various power source combinations including City Power to Generator, City Power to City Power, Generator to Generator, and PV/Inverter (over 3000W AC Power) to City Power or Generator.

Figure 1: GEYA W2R-100 Dual Power Automatic Transfer Switch

Product Components

Figure 2: Product Overview Diagram with labeled components

1. Composite Terminal Block for Main Power A
2. Main Power Indicator
3. Standby Power Indicator
4. Manual/Automatic Selector Switch
5. Composite Terminal Block for Standby Power B
6. Main Power Terminals
7. Standby Power Terminals
8. Load Terminals
9. Mounting Hole (4P)
10. Manual Rotary Switch

2. Setup and Installation

Important Notice: Read this manual carefully before installing or operating the product. Installation and wiring must be performed by qualified personnel familiar with this manual. Unauthorized disassembly is strictly prohibited.

2.1 Mounting Options

The W2R-100 ATS can be mounted using either a DIN rail or screws directly to a panel.

2.1.1 DIN Rail Installation

1. Insert the upper end of the ATS base into the DIN rail.
2. Push the lower end of the ATS base into the DIN rail until the snap fastener locks securely.

Figure 3: DIN Rail Installation

2.1.2 Screw Mounting

1. Pull out the upper and lower snap fasteners located at the bottom of the ATS.
2. Secure the ATS to the panel with screws.

Figure 4: Screw Mounting

2.2 Pre-Installation Checks

• Before installation, check the ATS for any damage or missing parts.
• Manually operate the mechanism using the operation handle to verify smooth movement, correct switching of all phases, and the load status of both power sources.
• Ensure the text on the ATS panel is visible from the front.
• Install suitable circuit breakers in accordance with IEC 60947-6-1 and the distribution system design.

2.3 Wiring Instructions

Observe the required safety clearances. Use copper wires with a cross-sectional area of at least 2.0 mm², and keep control circuit wiring as short as possible.

• Connect the phase (AR) and neutral (AN) to the main power input terminals (mandatory).
• Connect the phase (BR) and neutral (BN) to the backup power input terminals (mandatory).
• Connect the load to the lower terminals on the backup power side using stepped wiring. Remove the isolation board before wiring the load, reinstall the board, and ensure proper alignment. It is recommended to connect the load before wiring the backup power.

2.3.1 Wiring Diagram for 2P (2-Pole) Model

Figure 5: 2-Pole Wiring Diagram (Common Power Supply, Service Control Line, Standby Power Supply, Backup Control Line, Load Output)

2.3.2 Wiring Diagram for 3P (3-Pole) Model

Figure 6: 3-Pole Wiring Diagram (Common Power Supply, Common Control Line, Common Neutral Line, Alternate Control Line, Backup Power, Load Output)

2.3.3 Wiring Diagram for 4P (4-Pole) Model

Figure 7: 4-Pole Wiring Diagram (Common Power Supply L1, L2, L3, N, Backup Power L1, L2, L3, N)

3. Operating Instructions

3.1 Manual/Automatic Operation

• Electric (Automatic) Operation: Ensures reliable switching. Keep the switch in automatic mode during normal operation.
• Manual Operation: Manual operation may cause contact wear and unstable performance. Switch to manual mode only after power is disconnected and maintenance is completed. Return to automatic mode promptly after any manual operation.

3.2 Voltage Status Indicators (LED)

The voltage status can be directly determined by the LED indicators on the device:

• Normal Voltage: LED steady on.
• Abnormal Voltage: Switches to backup power after a delay (default: 10 seconds).
• Over-voltage: LED flashing twice every 2 seconds.
• Under-voltage: LED flashing once every 2 seconds.
• Voltage Anomaly: LED flashing for 10 seconds (bright to dim for under-voltage, dim to bright for over-voltage).

3.3 Safe Operating Limits

To prevent overheating and permanent damage, do not operate the device at control voltages below:

• 190 V (for models with Rated Voltage Ue: AC 220 V, 50/60 Hz)
• 95 V (for models with Rated Voltage Ue: AC 110 V, 50/60 Hz)

Important: Always set the switch to Manual Mode before rotating the knob/handle.

4. Maintenance

Maintenance and inspection must be performed by qualified personnel after disconnecting all power supplies.

• Inspection Frequency: The first inspection should be completed within 6 months of commissioning, and at least once per year thereafter. In harsh environments, increase inspection frequency as needed.
• Key Tasks: Include removing dust and debris, checking contact parts for damage, discoloration, or burn marks, and measuring contact resistance if necessary.
• Humidity: If the ATS is damp or idle for an extended period, dry it thoroughly and measure insulation resistance with a 500V megohmmeter (minimum 10 MΩ).
• Storage: Store the ATS in a clean, dry environment, protected from mechanical impact.

5. Troubleshooting

This section provides guidance on common issues. For complex problems, contact technical support.

• Control Circuit TSE: The TSE is instantly energized during transfer. If internal switches malfunction after transfer, the control coil may be damaged.
• Coil Operation: The coil operates reliably within 85%-110% of its rated voltage. Insufficient voltage can cause overheating and failure. Ensure a stable power supply to avoid coil damage.
• Dielectric Testing: This product has undergone insulation testing before leaving the factory. Incorrect dielectric testing will damage the control system, and it is strictly prohibited to conduct dielectric testing with ATS.

6. Specifications

6.1 Dimensions

Figure 8: Product Dimensions (in mm)

• Overall Height: 103 mm
• Overall Depth: 78.5 mm
• Width (2P): 107.5 mm
• Width (3P): 125 mm
• Width (4P): 142.5 mm
• Safety Distance S1: ≥30mm
• Safety Distance S2: ≥203mm

6.2 Working Conditions

• Ambient Temperature Range: -5°C to +40°C (24-hour average must not exceed +35°C)
• Altitude: Should be higher than the installation site and not exceed 2000 meters.
• Operating Humidity: Up to 50% at +40°C; up to 90% at +25°C (condensation prevention required).
• Contamination Level: Level 3.
• Mounting Orientation: The ATS can be installed vertically in cabinets.

7. User Tips

• This ATS model features an integrated logic circuit for switching, offering advanced control compared to analog logic systems.
• The device actively monitors input voltage. If the input voltage is outside the 190V-250V range (for 220V models), the relay will signal the issue by flashing the LED on the problematic input and will not switch to that line, even if the primary power fails.
• Always switch the device to Manual Mode before rotating the selector knob/handle to prevent damage or unintended operation.

8. Warranty and Support

For warranty information, technical support, or any product-related inquiries, please contact GEYA customer service or your local distributor. Refer to the official GEYA website for contact details.

A detailed user manual in PDF format is also available for download: GEYA W2R-100 User Manual (PDF).