The acceptance process for high-frequency switching power supplies and phase-controlled rectifier devices involves several key steps to ensure safety, reliability, and compliance with technical standards. These include:
1. The equipment cabinets and panels must be securely fastened and properly grounded. The connection between the cabinet door and the main frame should be made using a bare flexible copper wire with a cross-sectional area of at least 6 mm². This ensures a continuous and reliable grounding path. Additionally, the surface coating should remain intact, and the equipment should be kept clean and well-maintained.
2. All electrical components installed inside the cabinets must be complete, in good condition, and correctly positioned. Circuit breakers or fuses should be selected according to specifications, and their operation should be selectively coordinated to prevent unnecessary tripping or failure during fault conditions.
3. The secondary wiring must be correctly connected, secure, and clearly marked. The insulation resistance should meet the required standards to ensure safe and stable operation.
4. In tropical and humid environments, the cabinets must be designed to resist moisture, mold, and heat. They should comply with the general technical requirements for tropical electrical products to ensure long-term performance and durability.
5. After installation, all cable entry points and gaps should be sealed to prevent water ingress, especially in areas where freezing temperatures may occur. This helps protect internal components from damage due to condensation or ice formation.
6. The system’s operational tests and interlocking functions should be verified. The AC power supply must switch reliably, and the overall system should meet the design specifications.
A new requirement has been added regarding the grounding of the cabinet doors and panels using a bare flexible conductor with a minimum cross-section of 6 mm². This is essential because the metal casing of secondary electrical equipment must be grounded to provide a safe path for fault currents. If the cabinet door is not properly grounded and an appliance is mounted on it, a failure in the insulation could result in dangerous voltages appearing on both the cabinet and the door, posing a serious risk to personnel. Additionally, grounding the door helps reduce electromagnetic interference, which is particularly important for sensitive electronic devices like microcomputers.
The use of a bare conductor with a minimum cross-section of 6 mm² ensures good electrical conductivity, sufficient mechanical strength, and ease of connection. By using a bare wire rather than an insulated one, it becomes more visible if the connection is broken, allowing for quicker detection and maintenance. This enhances both safety and system integrity.
Our company`s current transformers have high precision,wide range,small volume and good linearity that can be used to the field of electronic watt-hour meter, electric energy metering, electronic detection.
Performance
â—Power frequency insulation strength:The insulation between the primary winding and the secondary winding and the ground part of the CT can bear 4kV power frequency voltage for 1minute
â—Interturn insulation strength:The secondary open circuit, the primary winding through the rated current 1min, no inter-turn damage in the transformer
â—The deviation is better than the industry standards and national standards
Anyang Kayo Amorphous Technology Co.,Ltd. , https://www.kayoamotech.com