GEYA W2R Automatic Transfer Switch User Manual

1. Introduction

The GEYA W2R Dual Power Automatic Transfer Switch (ATS) is a miniature household power transfer switch designed to ensure continuous and reliable power supply. It automatically switches between a main power source (e.g., city power or PV inverter) and a backup power source (e.g., generator or city power) in case of a power failure or voltage abnormality. This product is specifically designed for household DIN rail mounting and is suitable for PZ30 distribution boxes.

The ATS features a robust structure, reliable switching, convenient installation and maintenance, and a long service life. It can operate both electrically and manually.

GEYA W2R ATS showing main circuit and flame-retardant design — Figure 1: GEYA W2R ATS with flame-retardant main circuit for safer switching.

GEYA W2R ATS demonstrating automatic switching in under 50ms — Figure 2: Automatic switching in less than 50ms for uninterrupted power.

GEYA W2R ATS highlighting industrial silver contacts — Figure 3: Industrial silver contacts improve product life and conductive performance.

2. Specifications

Feature	Specification
Brand Name	GEYA
Model Number	W2R
Type	Conventional Circuit Breaker
Poles Number	2P, 3P, 4P
Rated Current	63A, 100A
Rated Working Voltage (Ue)	AC 220V (for 2P), AC 400V (for 3P/4P) 50/60Hz
Insulation Voltage (Ui)	AC 690V, 50/60Hz
Rated Impulse Withstand Voltage	8kV
Classification	PC class
Electrical Life	2000 times
Mechanical Life	5000 times
Rated Short Circuit Current (lq)	50kA
Conversion Time of Contactor	<50ms
Operation Conversion Time	<50ms
Return Conversion Time	<50ms
Power Off Time	<50ms
EU LVD Voltage	Below 50Vac or 75Vdc
Is Smart Device	Yes
Certification	CE
Ambient Temperature Range	-5°C to +40°C (24-hour average must not exceed +35°C)
Altitude	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	Can be installed vertically in cabinets

Dimensions

3. Setup and Installation

Important Notice: Installation and wiring must be performed by qualified personnel familiar with this manual. Before installation, check the ATS for any damage or missing parts. Unauthorized disassembly of the product is strictly prohibited to prevent instrument failure or malfunctions.

3.1 DIN Rail Installation

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

3.2 DIN Rail Disassembly

Insert a screwdriver into the round hole of the DIN rail snap fastener at the bottom of the ATS.
Use the screwdriver to pry the DIN rail snap fastener downward.
Tilt the ATS upwards and remove it from the DIN rail.

3.3 Screw Mounting

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

3.4 Wiring Instructions

Ensure the text on the ATS panel is visible from the front. Contact the manufacturer if the correct mounting orientation cannot be achieved due to wiring or space constraints.

Install suitable circuit breakers in accordance with IEC 60947-6-1 and the distribution system design to ensure personnel and equipment safety.

Diagram of GEYA W2R ATS with labeled terminals and controls — Figure 5: Component identification: Signal Terminal, Source A Power Inlet Terminal, Auto/Manual Mode Switch, Source B Power Indicator, Transfer Handle, Source B Power Inlet Terminal, Power Output (Load Port).

Wiring Diagram for 2P GEYA W2R ATS — Figure 6: Wiring Diagram (2P) showing connections for common power supply (L, N), service control line, standby power supply, backup control line, and load output.

Control circuit wiring diagrams for 1P, 2P, 3P, and 4P ATS models — Figure 7: Control circuit wiring diagrams for various pole configurations (1P, 2P, 3P, 4P).
**Wiring Steps:**
Connect the neutral and live wires from the public control input line to connect AR (live wire) / AN (neutral wire).
Connect the neutral and live wires from the backup control input line to connect BR (live wire) / BN (neutral wire).
The power indication signal is an active output and takes the generator signal (common) and (normal shutdown).
Connect the load end to the lower end of the (backup power supply side) in a stepped connection.
There is an isolation board on the load. During wiring, please remove the isolation board first, connect the load, and then install the isolation board. It is recommended to connect the load first and then the backup power supply.
**Notes for Photovoltaic (PV) Type:**
The ordinary wiring method is the same as that of the photovoltaic type.
If a photovoltaic type is selected, the commonly used power supply must be connected to the photovoltaic sine wave inverter, and the backup power supply must be connected to the stable urban power supply.
When the backup urban power supply is abnormal, the photovoltaic type switch cannot automatically switch to the commonly used power supply for operation. At this time, manual closing is required.
The power supply after photovoltaic inverter operation must meet the rated power of 1100W.

Diagram showing main power supply options (City Power, Generator, PV) and connection method for single relay closing indicator light — Figure 8: Main power supply options (Common type: Utility power / Grid power, Generator / Utility power; Solar energy type: PV (inverter AC power supply), must be connected to mains power/grid). Also shows connection method for single relay closing indicator light (Common closing indication, Standby closing indication, C-NC: Generator Start Signal Contact).

4. Operating Instructions

4.1 Manual / Automatic Operation

The ATS features an active rotation button design for selecting between manual and automatic modes. The switch comes with manual and automatic mode, with an air switch style, and a durable chain structure.

Manual/automatic selection switch and manual handle on GEYA W2R ATS — Figure 9: Manual/automatic selection switch and manual handle for mode control.

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

4.2 Demonstration Video

Video 1: Demonstration of GEYA W2R ATS operation, including manual switching, automatic switching upon main power disconnection/restoration, and automatic switching due to overvoltage/undervoltage conditions.

4.3 Automatic Switching Logic (Automatic Mode)

Main Power Disconnection: When the main power supply is disconnected, the product automatically switches to the backup power supply.
Main Power Restoration: When the main power supply is restored, the product automatically switches back to the main power supply.
Undervoltage (Main Power): If the main power supply voltage drops below 175 volts, the product automatically switches to the backup power supply.
Overvoltage (Main Power): If the main power supply voltage reaches 260 volts or above, the product switches to the backup power source.
Voltage Restoration: When the voltage returns to above 195 volts (from undervoltage) or below 240 volts (from overvoltage), the product switches back to the main power supply.

Note: When abnormal voltage returns to normal voltage, the indicator light flashes for 15 seconds (with a delay of 15 seconds) and then returns to normal light. The power supply of this circuit will only be considered normal in the chip judgment after 15 seconds. Switch between primary and backup logic again.

4.4 Power-on State

After enabling this function, the device can perform automatic switching just like a normal ATS. However, when source A is powered on, the pointer of the ATS points to source B. If source B loses power at this time, source B cannot switch to source A.

5. Maintenance and Inspection

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

5.1 Key Maintenance Tasks

Remove dust and debris.
Check contact parts for damage, discoloration, or burn marks.
Measure contact resistance if necessary.

5.2 Storage

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). Store the ATS in a clean, dry environment, protected from mechanical impact.

6. Troubleshooting

Product Malfunction due to Low Voltage: If the product is used under a voltage lower than 180V (for AC 220-230V models) or lower than 90V (for AC 110V models), it will cause the product to malfunction. Ensure the control voltage is within the specified operating limits.
Control Circuit TSE Malfunction: The TSE is instantly energized during transfer. If internal switches malfunction after transfer, the control coil may be damaged. 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.
Abnormal Voltage Indication: If the power indicator light flashes for 15 seconds after abnormal voltage returns to normal, this is normal behavior. The circuit will only be considered stable after this delay.
Photovoltaic Type Switching Issue: When the backup urban power supply is abnormal, the photovoltaic type switch cannot automatically switch to the common power supply for operation. Manual closing is required in this scenario.
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.

7. User Tips

It is recommended to add overvoltage and undervoltage protectors for the circuit to enhance system reliability.
Always ensure the input power supply is connected in the correct phase sequence.
Use copper wires with a cross-sectional area of at least 2.0 mm² for wiring, and keep control circuit wiring as short as possible to minimize interference.

8. Warranty and Support

Please read this manual carefully before installing or operating the product. If you have any questions or require support, please contact the manufacturer or your supplier. Unauthorized disassembly of the product is strictly prohibited and may void any warranty.

For further documentation, you may refer to the User Manual (PDF).

GEYA W2R