GEYA GYHO8 MTS Dual Power Manual Conversion Isolating Switch User Manual

1. Introduction

The GEYA GYHO8 Dual Power Manual Conversion Isolating Switch is designed for safe and reliable switching between two power sources or loads. It offers four primary functions: on, off, conversion, and isolation. This device is suitable for industrial equipment and circuits requiring manual transfer capabilities, ensuring power continuity and safety.

It is built with a high flame-retardant PA66 injection molded shell and is designed for easy installation on a standard DIN rail (35x7.5 mm).

2. Safety Information

WARNING: Installation and maintenance of this device should only be performed by qualified personnel. Always disconnect power before working on electrical circuits to prevent electric shock.

• Ensure the device is protected by an appropriate Miniature Circuit Breaker (MCB) to guard against short circuits and disconnection.
• Verify all connections are secure and correctly wired according to the diagrams provided.
• Do not exceed the rated voltage and current specifications.
• Operate the switch firmly to ensure proper contact and avoid intermediate positions unless specified.
• The product is rated for low voltage (below 50Vac or 75Vdc) according to EU LVD Voltage standards.

3. Product Overview

The GYHO8 series offers various pole configurations (1P, 2P, 3P, 4P) to suit different electrical system requirements. Each switch features a clear ON/OFF/ON (I-0-II) handle for manual operation.

4. Specifications

4.1 Dimensions

5. Installation and Setup

The GYHO8 switch is designed for mounting on a 35mm DIN rail. Ensure proper protection with an MCB.

5.1 General Connection Steps

1. Bottom Wiring: Connect the incoming power sources (Main Supply and Standby Supply) to the designated bottom terminals.
2. Tighten Screws: Securely tighten all screw terminals to ensure good electrical contact and prevent loose connections.
3. Insulating Sheet: Paste any provided insulating sheets as instructed to maintain proper insulation and safety.
4. Top Wiring: Complete the wiring on top, connecting the outgoing load terminals. Ensure all connections are tightened.

5.2 Wiring Diagrams

The following diagrams illustrate typical wiring configurations for different pole versions. The incoming changeover switch must be protected by an appropriate MCB.

Single Phase Wiring (1P & 2P)

Three Phase Wiring (3P & 4P)

Important Note: When used for dual power switching, the lower terminals must be used for incoming power and the upper terminals for outgoing power.

6. Operating Instructions

The GYHO8 switch features a three-position handle for manual operation: I, 0, and II.

6.1 2-Pole Manual Transfer Switch (MTS) Operation Example

• Handle on 'I' position:
  • Terminals 1 and 2 are connected.
  • Terminals 5 and 6 are connected.
  • This typically connects the main power supply to the load.
• Handle on 'II' position:
  • Terminals 1 and 4 are connected.
  • Terminals 5 and 8 are connected.
  • This typically connects the standby/generator power supply to the load.
• Handle in the middle ('0') position:
  • Both groups of connections are disconnected.
  • This provides complete isolation from both power sources.

The specific terminals connected will vary based on the number of poles (1P, 2P, 3P, 4P) as detailed in the wiring diagrams. Always refer to the appropriate diagram for your specific model.

7. Maintenance

• Regularly inspect the switch for any signs of physical damage, overheating, or loose connections.
• Ensure the operating handle moves freely and clicks firmly into each position (I, 0, II).
• Keep the device clean and free from dust and debris. Use a dry cloth for cleaning.
• Do not use abrasive cleaners or solvents.
• If any issues are detected, disconnect power immediately and consult a qualified electrician.

8. Troubleshooting

If you encounter problems with your GEYA GYHO8 switch, consider the following:

• No power to load:
  • Check if the handle is firmly in the 'I' or 'II' position. Ensure it's not in the '0' (OFF) position.
  • Verify that the incoming power sources (main and standby) are active.
  • Inspect all wiring connections for looseness or damage.
  • Check the upstream MCB for tripping.
• Switch feels stiff or jams:
  • Ensure there is no physical obstruction preventing the handle from moving.
  • Operate the switch with a firm, deliberate motion.
  • If the issue persists, the internal mechanism might be faulty, and the unit may need replacement.
• Overheating:
  • Disconnect power immediately.
  • Check if the load current exceeds the rated current of the switch.
  • Ensure all terminal connections are tight to prevent resistance heating.
  • Verify proper ventilation around the switch.

For complex issues, always consult a qualified electrician.

9. User Tips

• Quality Assurance: Users generally report good quality and performance. Ensure you receive the correct model and inspect it upon arrival.
• Smooth Operation: While generally reliable, some users have noted that the switch might feel less robust in certain modes. Always operate the handle with a firm and complete motion to ensure proper contact and avoid intermediate states.
• Installation: The DIN rail mounting makes installation straightforward. Double-check all wiring against the provided diagrams for safety and functionality.

10. Warranty and Support

For warranty information, technical support, or service inquiries, please contact your point of purchase or the manufacturer directly. Keep your purchase receipt as proof of purchase.

GEYA products are certified to required industry standards, including CE, CB, SAA, ISO 9001, UK CA, and RoHS, ensuring compliance and quality.