| Brand | Wone |
| Model NO. | JN15-12 indoor high-voltage AC grounding switch |
| Rated voltage | 12kV |
| Rated short circuit breaking current | 80KA |
| Phase distance | 210mm |
| Series | JN15-12 Series |
Description：
The grounding switch refers to a mechanical earthing device that releases the electrostatic charge of the equipment to be repaired and the circuit and ensures the personal safety of the maintenance personnel during power failure. It can withstand a certain period of time under abnormal conditions such as a short circuit, but does not pass through the load current under normal conditions. It is usually part of the disconnector.
Industry applications：
It is suitable for power systems with AC 50Hz of 12kV and below. It can be used for grounding protection during the maintenance of high-voltage electrical equipment, and can also be used with various types of high-voltage switchgear.
Features：
Ambient temperature: -15°C~+40°C.
Altitude: 1000m and below.
Relative humidity: daily average not more than 95%, monthly average not more than 90%.
The daily average value of water vapor pressure is not more than 2.2 kPa.
The monthly average water vapor pressure is not more than 1.8 kPa.
There is no fire, explosion hazard, serious pollution, chemical corrosion and severe vibration.
Our company has developed products suitable for high altitude (E≥230mm, altitude up to 4000m) for users to choose.
Technical parameters：
Serial number |
Name | Unit | Data | ||
| 1 |
Rated voltage | KV |
12 |
||
| 2 | Rated short-time withstand current | KA |
31.5 | 40 | |
| 3 | Rated short-circuit duration | S |
4 |
2 |
|
| 4 | Rated peak withstand current | KA |
80 | 100 | |
| 5 | Rated short-circuit 3-off current | KA | 80 |
100 | |
| 6 | Center distance between phases | mm | 150、210、275 |
||
| 7 |
1min power frequency withstand voltage (RMS) | KV |
42 |
||
| Lightning impulse withstand voltage (peak) | 75 |
||||
Dimension：
Product show：
Why choose us：
We have a professional service team
We have good after-sales
We can guarantee the quality of our products
What are the structural characteristics of indoor high-voltage AC grounding switch？
Contact System：
Materials: The contact system typically uses high-performance conductive materials such as copper alloys to ensure good conductivity and the ability to withstand high current impacts.
Design: The shape of the contacts can vary, including knife-type contacts and finger-type contacts, among others. These designs aim to increase the contact area, reduce contact resistance, and minimize heat generation.
Operating Mechanism：
Manual: Simple and reliable, with lower costs. Suitable for applications where the frequency of operation is low.
Electric: Enables remote control and automated operations, making it easy to integrate with the monitoring systems of substations.
Spring-Operated: Combines the advantages of manual and electric mechanisms. It uses pre-stored spring energy to achieve fast and reliable opening and closing operations.
Insulation Section：
Insulators: Primarily composed of insulators made from materials such as ceramic, glass, or composite materials.
Ceramic Insulators: High mechanical strength and excellent insulation properties.
Glass Insulators: Good self-cleaning performance, capable of resisting windblown sand and dirt to some extent.
Composite Material Insulators: Combine multiple advantages, such as being lightweight and having excellent pollution resistance.
-
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
