Why is the disconnector not allowed to be operated with load? Does anyone know?

The disconnector is not allowed to pull the switch with load, because the disconnector is inherently deficient.

Disconnect**.

This defect is that the disconnector does not have an arc extinguishing device, which cannot effectively block or extinguish the arc.

If it is really a load disconnector, it will definitely cause a very serious accident due to the arc short circuit!

The best function of the disconnector is that it has an obvious disconnection point, which provides safety and psychological comfort to people during maintenance!

No matter what kind of isolating switch, it is not allowed to split and close the disconnector with load! This must not be overlooked!

If the disconnector is operated under load, it will cause a large arcing phenomenon due to the slow opening and closing speed of the dynamic and static cutter heads, and the contact point of the cutter head will be ablated. Especially in the state of high current, it is more serious, and even causes the interphase arc short circuit of the disconnector and causes power supply accidents. Therefore, the disconnector is not allowed to operate with load.

Disconnect**. In terms of function, it is used to disconnect and close the connection of the line, and there is an obvious disconnection point when the switch is in the open state. Generally, there is no arc extinguishing device on the isolation switch.

It is more serious in the state of high current, and even causes the interphase arc short circuit of the disconnector and causes a power supply accident.

Therefore, the disconnector is not allowed to operate with load.

Hazards of operating disconnectors with loads:

1. In addition to causing a serious threat to the safety of power supply, it may also endanger the personal safety of the operator due to the serious arc light generated by misoperation, and even cause the isolation switch in serious cases, causing greater harm to people.

2. The indirect harm of pulling the disconnector with load on the indoor power distribution installation is sometimes quite serious. For example, when an arc flash short circuit occurs in some indoor power distribution installations, if the circuit breaker jumps off, it will cause fuel injection and cause serious consequences.

3. For indoor power distribution devices, due to the role of grounding components in the live interval, it generally will not directly cause short-circuit discharge to people. However, if the charged spaced doors and windows are mesh windows, the operator is equally likely to suffer arc burns.

4. For the outdoor power distribution device, the operator directly stands under the isolation switch to operate, and there is no baffle protection between the isolation switch and the person, when the person pulls the isolation switch, due to the short circuit to the ground after the arc is elongated, the operator will suffer from arc burns, and in serious cases, it may cause a direct short circuit discharge to the person.

The isolation switch is not designed to cut off the load current, it generally does not have an arc extinguishing device, and the current is slightly larger, it is easy to short circuit the arc light or burn out the contact, so it is only used to isolate and ensure the safety of the load side maintenance personnel. When the power is transmitted, it is isolated first, and when the gate is pulled, the isolation is pulled later, which is to ensure that it operates without load.

Summary. Hello, the operation of the disconnector at full load will lead to the following problems:1

Arcing: When the disconnector is operated at full load, it may produce arcing, which will lead to burning and wear of the contact part of the switch, affecting the service life of the switch. 2.

Burnout: If the disconnector cannot withstand the load current when operating at full load, the switch may be blown out, causing the circuit to break. 3.

Danger: The full load operation of the disconnector may lead to excessive heat in contact with the switch, and even cause disasters and other dangerous situations. Therefore, in order to ensure the normal use and safety of the disconnector, sufficient inspection and testing should be carried out before full load operation to ensure that the switch can withstand the load current and avoid long-term full load operation.

Hope I have to help you<>

What happens when the disconnector is operating at full load.

Hello, the operation of the disconnector at full load will lead to the following problems:1Arc:

When the disconnector is operated at full load, it may produce arcing phenomenon, which will lead to the burning and wear of the contact part of the switch, affecting the service life of the switch. 2.Burned:

If the disconnector is unable to withstand the load current when operating at full load, the switch may be burned and the circuit may be interrupted. 3.Danger:

The operation of the disconnector at full load may lead to excessive heat in contact with the switch, and even dangerous situations such as disasters. Therefore, in order to ensure the normal use and safety of the eggplant lead boy when the vibrator leaves the off, sufficient inspection and testing should be carried out before full load operation to ensure that the switch can withstand the load current and avoid full load operation for a long time. Hope I have to help you<>

Will it cause the leakage protector of the upper level to trip?

Hello, the full load operation of the disconnector will not necessarily cause the tripping of the upper level leakage protector, it depends on the specific circuit design and equipment parameters. If the rated current and load current of the disconnector are the same, and the load current is within the rated current range, then the full load operation of the disconnector will not cause the leakage protector of the upper level to trip. However, if the current of the family load exceeds the rated current of the disconnector, or if there is a fault in the disconnector itself, then it may cause the leakage protector of the upper level to trip.

Therefore, in actual operation, it should be evaluated and dismantled and controlled according to the specific situation to ensure the safe and reliable operation of the circuit.

What is a load disconnector? What are the functions of load disconnectors? Let's answer them one by one!

Introduction to load disconnectors.

A load disconnector is a device that isolates the blackout part from the live part and creates a significant disconnect point to isolate faulty equipment or undergo power outage maintenance. Load disconnectors are widely used in power distribution systems and automation systems in construction, electric power, petrochemical and other industries.

The modular design structure has flexible and diverse combinations, and the shell is made of glass fiber reinforced unsaturated polyester resin, which has high dielectric properties, protection capabilities and reliable operational safety.

The operating mechanism is an acceleration mechanism for spring energy storage and transient release, and a contact structure with double interrupt points for transient connection and breaking. Independent of the speed of the operating handle, the electrical and mechanical properties are greatly improved.

A variety of structures and operation methods, there are windows for direct observation of the on-off state of the contact, there are cabinet and cabinet operations, there are front and side operations, and there are board rear wiring.

The load disconnector is beautiful, novel, concise, and small in size, and the function is an ideal choice for similar products.

The role of the load disconnector.

The load switch is composed of a fuse and an isolation switch, the isolation switch disconnects the normal operation current, and the fuse breaks the circuit fault current, so the load switch has a certain protective effect on the motor. However, a contactor should be added to the back of the load switch as an operating element of the motor circuit and an overload and overcurrent protection element. The circuit should not be operated only with a load switch, because the load switch is not an element that allows for frequent operation and does not fully protect the motor.

Functional characteristics of load disconnectors.

1. The acceleration mechanism of the transient release of spring energy storage realizes fast switching or breaking (meters and seconds), which has nothing to do with the speed of the operating sheath, and greatly improves the ability to extinguish the arc. 2. The shell made of glass fiber reinforced unsaturated polyester resin has good flame retardant properties, dielectric properties, carbonization resistance and impact resistance.

3. The parallel double interrupt point contact has a self-cleaning effect.

4. All contact materials are copper silver-plated alloys with two separate contact faces.

5. The isolation distance is large.

6. When the "0" position, the handle can be locked with three locks at the same time to reliably avoid misoperation.

The introduction of the load disconnector is here today, I hope the above content can explain to everyone!

The isolation switch is a switchgear without arc extinguishing device, which is mainly used to disconnect the circuit with no load current, isolate the power supply, and have an obvious disconnection point in the open state to ensure the safety maintenance of other electrical equipment.

In the closed state, it can reliably pass the normal load current and the short-circuit fault current. Because it does not have a special arc extinguishing device, it cannot cut off the load current and short-circuit current. Therefore, the disconnector can only be operated when the circuit has been disconnected by the circuit breaker, and it is strictly forbidden to operate with load, so as not to cause serious equipment and personal accidents.

Only voltage transformers, lightning arresters, no-load transformers with excitation current of no more than 2A, and no-load lines with current of no more than 5 A can be directly operated with isolation switches.

The load switch is a kind of switching appliance between the circuit breaker and the isolation switch, which has a simple arc extinguishing device, which can cut off the rated load current and a certain overload current, but cannot cut off the short-circuit current.

Difference: Different from the disconnector, the load switch has an arc extinguishing device, which can automatically trip the load switch through the thermal tripper when overloaded.

Switches are one of the most widely used devices in our daily lives, and they are also an essential part of our daily lives. At home, our most common power supply device is switch, socket, main power switch, etc., so do you know what is a load switch? So what is the difference between load switch and isolation switch?

What is a load switch.

The load switch is a kind of circuit switch device that can be disconnected and closed by itself under the normal working state of the circuit, and this load switch contains an arc extinguishing device, and its internal structure is also very simple. Such a simple sentence solves the problem of what is a load switch, I don't know if you understand it? Let's take a look at what a disconnector is.

What is a disconnect.

What is a disconnect. The disconnector is the most used and most frequently used electrical device in the coarse high-voltage switch. The disconnector is to play an isolation role in the circuit, and its internal structure is also very simple, but because it is used the most, the requirements are relatively high when working, and if it is applied to the power plant, the impact on the design and safety of the power plant is relatively large.

This is the so-called disconnector, and it's actually not that hard.

The difference between load switch and isolation switch is one.

The difference between the load switch and the disconnector is that the current cut off by the two is not the same. Because the disconnector does not have an arc extinguishing device, it is only suitable for cutting off the current of no load, and cannot cut off the load current and short-circuit current, so the electrical appliance can only be operated safely under the condition of safe disconnection of the circuit, and it is strictly operated with load, so as not to cause safety accidents. Because the load switch has an arc extinguishing device, it can overload the current and the rated load current, but it cannot cut off the short-circuit current again.

The difference between load switch and isolation switch is one.

The first point of the difference between the load switch and the isolation switch is that the load switch has an arc extinguishing device, while the disconnector does not have such a device, so what is the difference between whether there is this arc extinguishing device? The so-called arc extinguishing device is to better help the disconnection and closure of the switching appliance, and can also effectively limit the arc and help the arc to extinguish. There is such an arc extinguishing device, which is safer for switching appliances.

Therefore, most of the switching appliances are made of arc extinguishing devices. Especially switching appliances for household use.

The difference between load switch and isolation switch is three.

The role of the two is different, and this is one of the differences between load switch and disconnector. Because there is no arc extinguishing device, the isolation switch can only be used in the part of the high-voltage circuit device that needs to be charged and the part that needs to be cut off for an isolation function, so as to ensure the maintenance and inspection of the high-voltage circuit and ensure the safety of the personnel. The load switch is applied to fixed high-voltage equipment, which can cut off the fault current and rated current in high-voltage equipment, so the role of the two is different, but both are applied to high-voltage equipment.

The disconnector does not have an arc suppression device, and there is no requirement for the ability to cut off the current in its technical conditions.

The charge current will produce a short circuit of arc light, causing major accidents such as equipment burning, and at the same time, a large amount of electricity will be emitted due to a strong arc.

heat and light, but also electric shock and electrical injury to the operator.