Yes, we welcome sample order to test and check the quality.
Yes, of course, we also do OEM to print client’s brand on the product.
We provide one year of warranty for the products. Please feel assured.
- An earth switch in switchgear primary’s function is to protect technicians and switchgear from an inadvertent operation. It can be reliably closed against short-circuit currents.
- It is connected to circuit breakers, and when they are cleared and racked out, the bus bar that is adjacent to the circuit breakers is grounded through earthing switches automatically. This process protects technicians, maintenance personnel, and users from any unfortunate accidental voltages.
- It is used for static electricity and electromagnetic induction current. In two or more overhead transmission lines with the same tower or adjacent parallel arrangement, when one or several lines are out of power, due to the electromagnetic induction and electrostatic induction between it and the adjacent live lines, the outage circuit will generate induced voltage and induced current. Hence, the grounding switches for this type of line.
- It’s used to close short-circuit current. An earthing switch with a rated short-circuit making current shall be able to close at any applied voltage including its rated voltage and any current including its rated short-circuit making current. The earthing switch has a rated short-circuit making the current equal to the rated peak withstand current.
- An earthing switch in a substation performs cogent functions in a big or heavy-duty power transformer as it allows the electrical grid to have a consistent point of reference for voltage. Otherwise, voltages may vary from one place to another. It guarantees safety for both the transformer and people to use power.
1. Indoor high voltage grounding switch
When the operating mechanism is operated to close the grounding switch, it acts as a torque to make the main shaft overcome the resistance torque. Drive the crank arm to rotate in the closing direction, and make the operating lever on the grounding knife pass through the dead point of the compression spring, and the compression spring releases energy. Make the earthing switch close quickly in the closed position. The grounding knife on the grounding knife assembly is in a firm and reliable contact with the flange portion (knife edge) of the static contact through the disc spring.
When the torque is applied, the main shaft overcomes the main torque and the spring force drives the arm to rotate in the direction of opening, and makes the grounding knife pressure spring pass through.
2. Indoor high voltage electric grounding switch
3. FES Fast Earthing Switch
The FES fast earthing switch (FES) has the ability to close short-circuit current, and open and close induced current, so it is an important protection device during maintenance. It’s also operated by an electric spring mechanism. The fault earthing switch is suitable for the grounding switch on the outside of the line. The mechanism operation is generally installed on the line side of the line outlet disconnector, and is electrically interlocked with the related disconnectors and circuit breakers.
While the earthing switch is used to ground or disconnect. When the equipment is overhauled, an obvious grounding point should be formed on all sides where incoming electricity may be generated. It mainly includes busbar grounding switches, ground switches for outgoing and incoming lines (installed on the busbar side and outgoing side of the main transformer circuit breaker, and on the busbar side of the circuit breaker).
Below are common questions and answers that are asked about circuit breakers and disconnect switches.
- What can a circuit breaker do that a disconnector switch cannot do?
Unlike a circuit breaker, a disconnector switch cannot suppress electric arcs which occur when conductors carrying high currents are electrically interrupted.
- Does a main switch have to be a circuit breaker?
Unlike a circuit breaker, a switch does not provide any form of protection. All you need to ensure that your switch has is the capability to carry the maximum load without failing. The purpose of a main switch to a circuit breaker is different. A main switch does not have to be a circuit breaker.
- How do a disconnect switch and a disconnect differ?
- A “disconnect switch” is also referred to as a load break switch. Its primary function is to serve as a disconnect means for a service entrance, while a “disconnect” major function is to protect heavy machinery like motors.
- How does a safety switch and a circuit breaker differ?
- A safety switch keeps engineers and technicians safe from electrical accidents like electrocution, while a circuit breaker protects the wiring and electrical system.
- How does a fusible switch and a non-fusible switch differ?
- A fusible switch has a fuse built into the switch and enclosure assembly, allowing you to open and close the circuit while also protecting it from overcurrent. A non-fusible switch, on the other hand, does not have a built-in switch and it doesn’t give any circuit protection.
A switchgear is used to switch, isolate, protect, and control electrical equipment. It regulates current changes, load faults, protects users during maintenance, etc. A switchgear is made up of four major components. They are: load break switch, disconnector, disconnector switch, and circuit breaker. These four components have their distinct functions, ensuring that electrical equipment functions properly.
These components have an overall responsibility of ensuring safety in electrical engineering, but they have their distinct functions. As a high voltage disconnect switch manufacturer with vast knowledge about electrical equipment, we will be discussing with you the difference between these four components – load break switch vs disconnector vs disconnect switch vs circuit breaker.
- A load break switch is a mechanical switch that can make, break, and carry currents in normal, energized circuit conditions. It also has the capability of carrying specified time currents in specified circuit conditions (like a short-circuit). However, according to IEC 60947-1 and IEC 60947-3, a load switch may be able to carry time currents in short-circuits, but it cannot break time currents.
- A disconnector is used to separate electrical equipment when they need to be checked as a normal maintenance routine, or when they need to be repaired. The primary purpose of using a disconnector is for protection; the device keeps the inspector or repairer safe from electrical hazards.A disconnector is a mechanical device that cuts off all or specific areas of the installation for safety reasons. Electricity is stopped from flowing through, thereby allowing inspection and maintenance to be done. An example is an earth switch that closes against short-circuit currents, keeping the technicians and switchgear safe from inadvertent operations.A disconnector makes sure that electricity does not flow in a system from “pole to pole” and from “input to output.” It can be operated automatically or manually, depending on the type of device you’re using it on, however, it must never be used in connecting or stopping an energized circuit.
- Judging from the name, a disconnector switch is a device that combines the functions of a switch and a disconnector. A disconnector switch is a mechanical device that can make, break, and carry energized circuits. At the same time, it has the capability of isolating electrical equipment fully or a specific section for safety reasons.There are different types of disconnector switches. Amongst them are the normal switch disconnectors, fuse switch disconnectors, and circuit breakers.
- A circuit breaker, also known as the “heart of the electrical system,” is an electrical switch that safeguards an electrical circuit from any damage that could be caused by excessive current induced by an overload or short circuit.A circuit breaker will distribute electric energy and switch off the circuit automatically when it is highly overloaded, short-circuited, or under-voltage. Its function is similar to that of a fuse switch. It can make, carry, and break currents in normal circuit conditions. It can also make and carry currents in specified circuit conditions, as well as break currents in certain abnormal circuit conditions, such as a short-circuit.Circuit breakers are designed to fulfill the functions of load break switches and disconnectors.
Medium-voltage switchgear is a crucial component in electric power systems, operating in the range of 1KV to 75KV. It plays a vital role in controlling, protecting, and isolating electrical equipment, including motors, generators, feeder circuits, and transmission and distribution lines. The switchgear incorporates electrical disconnect switches, fuses, or circuit breakers, ensuring the reliability of electricity supply by enabling safe maintenance work and swiftly clearing faults downstream. Its significance in power distribution makes it a key element in ensuring a stable and efficient electrical infrastructure.
Vacuum Circuit Breaker (VCB) is a type of circuit breaker that utilizes vacuum as the arc extinction medium. The fixed and moving contacts are enclosed in a permanently sealed vacuum interrupter. When the contacts are separated in high vacuum, the arc is extinguished. VCB is commonly used for medium voltage applications, ranging from 11 KV to 33 KV. It is known for its reliable arc quenching properties and environmentally friendly operation.
Yes, we can customized according to client’s needs.
We accept T/T, L/C, etc.
It usually takes about 5-25 workdays to produce. Different products have different delivery time.