| Brand | Switchgear parts |
| Model NO. | 126kV/800kV drum platform components |
| Rated voltage | 126/800kV |
| Series | RN |
126kV/800kV cylindrical platform components are key structural parts in high-voltage power equipment, and their design needs to meet insulation, mechanical, and environmental adaptability requirements under high voltage levels. The following is a comprehensive technical analysis:
1、 Design Features and Material Selection
Voltage level difference
126kV cylinder platform components are usually made of epoxy resin composite materials, with a dielectric strength of ≥ 30kV/mm and a local discharge capacity of ≤ 5pC
800kV cylinder platform components require the use of high dielectric constant materials (such as alumina filled epoxy resin) with a dielectric strength of ≥ 50kV/mm, and are insulated with SF6 gas
Structural optimization
The 800kV cylindrical platform needs to adopt a multi-layer composite structure, such as a "metal insulation metal" sandwich design, to suppress electric field distortion
The 126kV cylindrical platform can adopt a single-layer insulation structure, but it is necessary to ensure that the creepage distance is ≥ 3.2mm (pollution level 2)
2、 Performance parameters and validation
Electrical performance
126kV parts have a power frequency withstand voltage of 230kV and a lightning impulse withstand voltage of 550kV; 800kV parts have a power frequency withstand voltage of 800kV and a lightning impulse withstand voltage of 1200kV
The 800kV drum platform needs to pass a 1200V DC/1-minute withstand voltage test with a leakage current of<1mA
Mechanical performance
The maximum deformation of the 126kV drum platform is ≤ 0.45mm, and the interface stress is below 70MPa; The 800kV cylinder platform needs to pass a water pressure test at 1.5 times the rated pressure
3、 Typical Applications and Standards
Application scenarios
126kV tube platform is used for urban substations and industrial power supply systems (such as automobile manufacturing plants)
800kV tube platform is used for ultra-high voltage transmission projects (such as ± 800kV DC lines)
Standard specifications
The design must comply with GB/T 11022-2020 "Common Technical Requirements for High Voltage Switchgear and Control Equipment Standards"
800kV components must meet the aging testing requirements for insulation materials in DL/T 246-2006 "Guidelines for Chemical Supervision"
4、 Manufacturing and Testing
Process requirements
The 126kV cylinder platform can use vacuum casting technology, while the 800kV cylinder platform requires 3D printing and gradient material composite technology
800kV parts require X-ray inspection for laminated defects
Environmental friendliness
800kV cylinder platform needs to reduce SF6 gas consumption by 15%, in line with the environmental protection requirements of the "Guiding Catalogue for the First Batch of Application Demonstrations of Key New Materials"
Note: Customization with drawings is available
-
Why Regular Transformer Maintenance Matters: 5 Serious Consequences of Neglecting ItI. Allowable TemperatureWhen a transformer is in operation, its windings and iron core generate copper loss and iron loss. These losses are converted into heat energy, causing the temperature of the transformer's iron core and windings to rise. If the temperature exceeds the allowable value for a long time, the insulation will gradually lose its mechanical elasticity and age.The temperature of each part of the transformer during operation is different: the winding temperature is the highest, folRockwell09/12/2025 -
How to Implement Condition-Based Maintenance for Power Transformers? A Complete 4-Step Process Analysis1. Definition of Condition-Based MaintenanceCondition-based maintenance refers to a maintenance method where decisions on whether and how to perform maintenance are determined based on the real-time operating status and health condition of equipment. It has no fixed maintenance methods or schedules. The prerequisite for condition-based maintenance is the establishment of equipment parameters and the comprehensive analysis of various operational information of the equipment, so as to make reasonaNoah09/12/2025 -
Can't choose a dry-type transformer? Get expert advice – free.Traction Rectifier TransformersRated capacity: 800 to 4400 kVA; Voltage class: 10 kV and 35 kV; Rectifier pulse number: 12-pulse and 24-pulse. Compared with 12-pulse rectifier circuits, 24-pulse rectifier circuits can reduce the harmonic pollution of the power grid by 50%, and no filtering equipment is needed at this location. It is suitable for power supply systems of urban subways and rail transit.Excitation Rectifier TransformersRated capacity: 315 to 3000 × 3 kVA; Voltage class: 10 kV, 13.8Vziman09/12/2025 -
SG10 Series Transformer Overload Protection Solution | Prevent Overheating and Damage, View NowOperating Conditions in National Standard GB 6450-1986Ambient temperature: Maximum ambient temperature: +40°C Daily average maximum temperature: +30°C Annual average maximum temperature: +20°C Minimum temperature: -30°C (outdoor); -5°C (indoor) Horizontal axis: Product load; Vertical axis: Average coil temperature rise in Kelvin (note: not in Celsius).For Class H insulation products, the long-term temperature resistance of insulation materials is stipulated by the state as 180°C. However, the inRockwell09/12/2025 -
High harmonics? Your transformer may be overheating and aging fast.This report is based on the analysis of one-day power quality monitoring data of your company's distribution system. The data shows that there is significant three-phase current harmonic distortion in the system (with a high total harmonic distortion of current, THDi). In accordance with international standards (IEC/IEEE), harmonic currents at this level have posed substantial risks to the safe, reliable, and economical operation of the power supply transformer, mainly manifested in additional hLeon09/12/2025 -
Ultimate Guide to AC Contactor Abnormal Noise: From Electromagnetic Noise to Mechanical Vibration, Accurate Diagnosis and HandlingIn electrical control systems, AC contactors are among the commonly used electrical components, and they are also a common source of various electrical faults. After long-term use—especially in harsh environments with high levels of dust—AC contactors may sometimes emit squeaking or rattling noises after being pulled in and held. The causes of this phenomenon are analyzed as follows.Squeaking Noise After Pull-In and HoldingA fully functional AC contactor makes no noise when energized and pulledFelix Spark09/11/2025
