China Medium voltage protection devices Manufacturer, Supplier, Factory

12KV Indoor Medium Voltage Vacuum Circuit Breaker is a high-voltage solution for indoor applications, featuring a rated voltage of 12KV and a frequency of 50Hz for three-phase AC systems. This product, known for its reliability, complies with the GB1984-89 standard. The design of this product is available in two configurations: the switch body and operating mechanism are integrated, and a modular version where the switch body and operating mechanism are separate. The integrated design is denoted as the ZN28-12 type, while the modular design is referred to as the-12 type, suitable for use in fixed switches such as GG-1A(Z) and XGN2A10(Z). This product can be paired with DC electromagnetic types CD17 and CD10A, as well as spring energy storage types CT17 and CT19.

The SC(B) series epoxy resin dry-type transformer has been meticulously designed to provide exceptional performance and reliability. Its robust construction and explosion-proof features make it a trustworthy choice for a wide range of applications. The compact size and maintenance-free operation of this transformer make it well-suited for direct installation in load centers without any hassle. Furthermore, its encapsulated winding not only ensures a pollution-free environment but also adds to its durability. This transformer incorporates advanced design and casting processes that significantly reduce partial discharge, minimize noise levels, and improve heat dissipation, thereby enhancing its overall reliability. Moreover, with forced air cooling, it can operate reliably under a 125% rated load for extended periods, making it a dependable solution for demanding operational requirements.

KYN28A-24 (SDK1-24) armored removable AC metal-enclosed switchgear 24KV 3150A High Current Electrical Switchgear (from now on referred to as switchgear) is suitable for indoor three-phase 50/60Hz, rated voltage 24kV power systems. It is mainly used in power plants. In substations, industrial and mining enterprises, and high-rise buildings, it receives and distributes electric energy and controls, protects, and monitors circuits.

The 72.5KV Outdoor high-voltage SF6 ceramic column circuit breaker is designed for controlling and protecting 72.5KV transmission and transformation systems. It operates on a three-phase AC 50HZ outdoor high-voltage switchgear and can function and opener group. By utilizing the intelligent arc extinguishing principle of "thermal expansion+auxiliary blowing" and equipped with a CTB-1 operating mechanism, this circuit breaker meets the standards of GB1984-2003 and International Electrotechnical Commission standard IEC62271-100:2001 for High Voltage AC Circuit Breakers.

In recent years, with the advancement of technology and the growth of society and the economy, engineering construction has become increasingly intricate. There is a rising demand for compact switchgear that is low-maintenance and smart. Both local and global switch manufacturers are currently engaged in the development of 40.5KV 630A Sf6 Sulfur Hexafluoride Filled Gas Insulated Switchgear, which are also referred to as gas-insulated switchgear (C-GIS). This type of switchgear houses high-voltage elements like busbars, circuit breakers, isolating switches, and power cables in a container with reduced gas pressure.

This circuit breaker is a multifunctional low-voltage protection device designed for distribution systems with AC 50Hz, rated voltage below 400V, and rated current below 63A. It is suitable for industrial, commercial, and civilian power networks. Its core functions integrate security protection, equipment protection, and intelligent monitoring, which can significantly improve the reliability and operation efficiency of the distribution system. Core functional highlights: 1. Safety protection 1) Personal safety assurance: Through high-precision residual current detection technology (RCD), indirect contact protection is provided, effectively reducing the risk of electric shock. 2) Equipment and line protection: Integrated overload and short circuit dual protection mechanism, accurately cutting off fault current, avoiding electrical fires and equipment damage. 2. Intelligent monitoring and early warning 1) Leakage pre-alarm function: Real-time monitoring of residual current in the circuit. When abnormal leakage (such as insulation degradation) is detected, an alarm signal is output through a passive normally open contact (dry contact). It can be linked to SCADA, fire protection system or sound and light alarm device without an external power supply to achieve early warning of faults and ensure power supply continuity. 2) Flexible threshold configuration: supports custom setting of leakage alarm values, adapting to sensitivity requirements of different scenarios (such as 30mA/100mA adjustable). 3. Diversified control ability Line and motor control: suitable for occasional switching operations of distribution lines or intermittent start-stop control of small motors, meeting the requirements of nonfrequent operation scenarios. Typical application scenarios: 1) Key power supply areas: places with high requirements for power continuity, such as data centers and hospital IT systems, have alarm nontrip mechanisms to avoid accidental power outages. 2) Equipment protection: Front-end protection for devices such as frequency converters and outdoor electrical cabinets that are susceptible to electrical leakage or environmental impact. 3) Intelligent operation and maintenance: By connecting to the building management system (BMS) through touch signals, remote monitoring and preventive maintenance can be achieved. Product advantages: 1) High reliability: thermal magnetic double trip structure, balancing overload delay protection and short-circuit instantaneous action characteristics. 2) Flexible expansion: an optional communication module, supporting remote status monitoring and fault diagnosis. 3) Easy installation: Standardized modular design, compatible with mainstream rail installation, suitable for compact distribution boxes. Summary: This circuit breaker is designed with the concept of "warning first, safety oriented", which ensures the safety of personnel and equipment while maximizing the stability of system operation. It is the preferred protective device for modern intelligent distribution systems.