wall bushings serve as critical electrical components, facilitating connections between high-voltage cables and equipment such as transformers and circuit breakers. The structure generally consists of an inner cylinder, outer cylinder, insulating sleeve, support ring, and support bucket. Key advantages include superior strength, high resistance to breakdown, protection against pollution flashover, and excellent corrosion resistance.
The TG3A-40.5-395 40.5KV Insulated Electrical wall bushing High Voltage Epoxy Resin is a high-quality electrical component designed for medium and high-voltage switchgear and electrical cabinets. It ensures superior electrical insulation, mechanical strength, and operational stability, supporting reliable energy transmission.
This guide covers daily maintenance, maintenance techniques, transportation requirements, and operational instructions, providing detailed information to ensure safe, efficient, and long-lasting performance.
Rated Voltage: 40.5KV
Material: High-strength epoxy resin
Design: Wall bushing for electrical cabinets and switchgear
Current Rating: Suitable for continuous high-voltage operations
Dimensions: 395 mm diameter
Operating Temperature: -40°C to +120°C
Dielectric Withstand Voltage: 95 kV/1 min
| Feature | Specification | Benefit |
|---|---|---|
| Electrical Insulation | Durable epoxy resin | Prevents leakage and short circuits |
| Mechanical Strength | Reinforced epoxy body | Withstands vibration and impact |
| Thermal Stability | High heat resistance | Maintains insulation at high loads |
| Energy Efficiency | Low dielectric loss | Reduces energy waste |
| Environmental Compliance | RoHS certified | Safe and eco-friendly |
| Longevity | Robust design | Reduces replacement frequency |
| Safety | Rated for 40.5KV | Protects personnel and equipment |
Routine maintenance ensures consistent performance and safety. Regular inspections detect potential issues early, preventing failures.
Visual Inspection: Check for cracks, discoloration, and surface contamination.
Connection Check: Ensure terminals and bolts are tight.
Cleaning: Remove dust or debris with a soft brush or compressed air.
Environmental Monitoring: Confirm the installation environment is dry and ventilated.
| Task | Frequency | Method |
|---|---|---|
| Visual Inspection | Daily | Check epoxy surface for damage |
| Terminal Tightness | Weekly | Tighten bolts to specified torque |
| Cleaning | Weekly | Use soft brush or compressed air |
| Environmental Check | Weekly | Ensure dry and ventilated cabinet |
Proper maintenance techniques extend the bushing’s lifespan and ensure reliable high-voltage operation.
Tighten all connectors and mounting bolts to recommended torque values.
Inspect for mechanical damage caused by vibration or external impact.
Replace any worn or damaged components immediately.
Measure insulation resistance using a megohmmeter at least quarterly.
Conduct partial discharge tests to detect early insulation issues.
Monitor for overheating with infrared thermography.
Use a soft, non-abrasive brush to remove dust.
Apply compressed air for hard-to-reach areas.
Avoid using solvents that may degrade the epoxy resin.
| Issue | Cause | Solution |
|---|---|---|
| Overheating | Excessive current or poor ventilation | Reduce load, improve airflow |
| Partial Discharge | Moisture or contamination | Clean or replace bushing |
| Cracks or Surface Damage | Mechanical stress | Replace damaged bushing |
| Loose Connections | Improper torque | Retighten connectors |
Proper transportation ensures the bushing remains undamaged before installation.
Use shock-absorbing materials such as foam or bubble wrap.
Place the bushing in a sturdy crate to prevent impact.
Ensure epoxy surfaces are protected from scratches and dust.
Handle with care using lifting equipment suitable for the weight.
Avoid dropping or applying force to the bushing body.
Maintain upright orientation to prevent internal stress on insulation.
Transport in a temperature-controlled environment to avoid extreme heat or cold.
Protect from humidity and rain to prevent moisture absorption.
Store in a dry, ventilated warehouse until installation.
| Requirement | Recommendation |
|---|---|
| Packaging | Shock-absorbing crate with foam padding |
| Handling | Lift with proper equipment, avoid dropping |
| Storage | Dry, ventilated environment |
| Temperature | Maintain between -20°C and +40°C |
| Moisture Protection | Keep covered and moisture-free |
The TG3A-40.5-395 bushing must be installed and operated according to manufacturer guidelines to ensure safety and performance.
Inspect the bushing for transport damage.
Confirm cabinet compatibility and dimensions.
Verify that all mounting and electrical accessories are included.
Align the Bushing: Position it correctly with the cabinet wall opening.
Mounting Flange: Secure the bushing using recommended torque values.
Connect Terminals: Attach conductor terminals with appropriate connectors.
Seal Installation: Use gaskets to prevent moisture ingress.
Pre-Energization Testing: Measure insulation resistance and verify dielectric withstand voltage.
Do not exceed rated voltage or current.
Maintain adequate cooling and ventilation around the bushing.
Monitor periodically for surface contamination, overheating, and partial discharge.
Follow emergency procedures in case of abnormal conditions.
| Issue | Cause | Solution |
|---|---|---|
| Overheating | High current or poor ventilation | Reduce load, improve airflow |
| Partial Discharge | Contamination or moisture | Clean or replace bushing |
| Voltage Drop | Loose connections | Retighten terminals |
| Surface Damage | Mechanical impact | Inspect and replace if necessary |
Reliable High-Voltage Insulation: Minimizes electrical faults.
Low Maintenance: Reduces downtime and operational costs.
Durable Epoxy Resin: Resists mechanical and environmental stress.
Energy Efficient: Low dielectric loss improves system efficiency.
Compliant with Standards: Meets industry testing and safety requirements.
Eco-Friendly: RoHS-compliant, reducing environmental impact.
Wide Application: Suitable for switchgear, electrical cabinets, and high-voltage installations.
The TG3A-40.5-395 40.5KV Insulated electrical wall bushing High Voltage Epoxy Resin is a robust and reliable solution for high-voltage applications. By following proper maintenance, transportation, and operational procedures, users can achieve long-term, safe, and efficient performance. Its durable epoxy construction, energy efficiency, and compliance with industry standards make it ideal for industrial, utility, and renewable energy environments.
Phone: +8613736779975
E-mail: sales@vcbbreaker.com
Address: 66 Punan Road, Yueqing Economic Development Zone, Zhejiang, China
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