What is the difference between explosion proof switches and ordinary switches?

The safety switch prevents personnel from entering the danger zone until all safety conditions have been met.

Provide bolt switches, safety magnetic switches, safety door lock switches, safety rope pull switches, emergency stop buttons, twisted chain interlocking switches, safety enabling switches, safety limit switches, explosion-proof switches, etc.

The safety switch is dustproof and waterproof, has strong shock resistance and long service life, and is suitable for standard mechanical engineering and fields with strict hygiene requirements.

The intelligent safety switch has the original one-to-one protection function of the line terminal, integrates the current overload protection technology into the ordinary switch and socket, and has the functions of temperature rise sensing, automatic power failure, alarm, reset, transfer, connection and so on. It not only prolongs the service life of the power supply line and eliminates the occurrence of electrical fires, but also cuts off the power supply at the fault location when the electricity is abnormal, and does not affect the normal electricity consumption of other electrical appliances.

Explosion-proof switches can be used in harsh and dangerous environments.

For example: coal mining industry, paint or ink manufacturers, wood processing plants, cement plants, shipping and sewage treatment. Explosion-proof switches are required.

Explosion-proof switches are primarily used in a variety of applications that require a safe, reliable, and easily disconnected connection. Especially in the case of machinery and equipment in manufacturing plants where explosive flammable gases may be present and in the case of system power supply; It is also used in the petrochemical industry; These include mills, grain silos, paint or ink factories, wood processing plants, cement plants, shipping and sewage treatment.

Explosion-proof switches are also suitable for use in external electrical equipment such as motors, pumps, lighting, process control devices in hazardous factories and factories, or in environments that cause flammable gases, vapors, mist gases or flammable dust.

According to the environmental characteristics, such as where there is water, it is necessary to use good waterproofness, and the explosion-proof switch is used in high-risk places, such as chemical industry, and other flammable and explosive places, which can separate the electric spark in the switch from the flammable and explosive substances to achieve the anti-riot level.

Explosion-proof switches are switches that meet the requirements of ** hazardous areas, generally increased safety type and flameproof type. The safety switch is a switch to meet the requirements of process safety production. For details, you can log in to the international cloud petrochemical industry aggregation platform, explosion-proof electromechanical has a variety of explosion-proof switches, and there are online experts to help you solve the problem.

Yun petrochemical platform for you to answer, explosion-proof switch refers to the working environment containing explosive flammable gas, steam, mist gas or flammable dust, explosion-proof switch must meet the explosion-proof requirements, to avoid danger in use.

Three wiring methods for explosion-proof double-link and double-control switching circuits.

1. One of the explosion-proof double wires must be directly connected to the middle and indirect line ends of the two double virtual and virtual control switches;

2. Another guide line in the double line connects the upper terminal (or lower terminal) of the two switches, and a branch line is connected with one end of the lamp, and the other end of the lamp is connected to the zero line.

There are four main types of explosion-proof switches, namely: cable switches, lighting switches, reverse switches, and travel switches. Explosion-proof switch refers to a switch that can be used in harsh and more dangerous environments, mainly used in the coal mining industry, paint or ink manufacturers, wood processing plants, cement plants, shipping and sewage treatment, and is also suitable for external electrical equipment, such as pumps, motors, lighting equipment.

Explosion-proof switch classification:

1. Reverse switch.

The appearance of the reverse switch is made of high-strength alloy aluminum one-time die-casting, and the surface is cleaned by high-speed shot blasting and then treated with high-pressure electrostatic spraying. The shell structure is compact and reasonable, the material density is good, the high strength is good, the explosion-proof performance is excellent, the surface plastic powder adhesion is strong, it has good anti-corrosion ability, the surface is smooth and clean, beautiful and generous, and the waterproof and dustproof performance is excellent. The machine is equipped with a reverse switch, which is mainly used in electrical circuits with a current of less than 100A, as a power introduction switch, and can control electric start, stop, and reversing.

2. Pull wire switch.

The appearance of the cable switch is made of aluminum alloy precision die-casting bright body, with high strength, light weight, and the shell protection level is IP67, which can work in harsh environments for a long time; The imported original is used in the machine, which has a large electric shock capacity, sensitive and reliable action.

3. a light switch.

The explosion-proof lighting switch has a compact and reasonable structure, good material density and high strength, excellent explosion-proof performance, and excellent waterproof performance. At present, it is widely used in dangerous environments such as oil exploitation, oil refining, chemical industry, military and poor workers, as well as offshore oil platforms, oil tankers and other places.

4. a travel switch.

The appearance of the explosion-proof travel switch is made of aluminum alloy shell, the surface is sprayed with plastic, and the built-in high-breaking miniature circuit breaker has the function of overload and short circuit protection, and can be equipped with leakage protection function according to requirements. The explosion-proof stroke is mainly routed through steel pipes or cables, and there are left rocker arm type, right rocker arm type, roller bumper plunger type, double rocker arm type, flexible contact type, mainly used in the temperature group T1-T6** gas environment.

Summary. Hello, the main difference between explosion-proof combination switch and combination switch is that the former has explosion-proof function, and the latter does not have explosion-proof function.

Hello, the main difference between explosion-proof combination switch and combination switch is that the former has explosion-proof function, and the latter does not have explosion-proof function.

The explosion-proof combination switch is the function of taking the pre-backup of the splitting and closing, and the low-power motor can also be started without any protection. The explosion-proof magnetic starter is with AC contactor and thermal relay, which is the most commonly used way to start the motor, and has short-circuit protection, thermal protection and other functions for the motor.

The explosion-proof combination switch is equipped with a transfer switch for electrical circuits with a current of less than 60A as a power introduction switch, and can control the motor start, change, stop, commutation and other round loose banquets. Combined switch is a wide range of electrical equipment, but in many cases due to the influence of external environmental conditions, the performance of the combined switch will also receive some interference, then the advantages of explosion-proof combined switch will appear. Especially in some occasions where the external environmental conditions are extremely harsh, digging plums has strong stability.

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1) FXD— Series explosion-proof distribution box This series of explosion-proof distribution box is suitable for places with ** gas mixture, in the AC 50Hz, voltage 380V line, as a distribution and lighting line overload and short circuit protection, can also be used as a motor infrequent start. Explosion-proof sign DUBT6.

2) DZ series explosion-proof automatic air switch DZ series explosion-proof automatic air switch is suitable for dangerous places with high-quality mixtures in factories and enterprises, in the AC 50Hz, electric acupressure 380V line, as a non-frequent use of dividing and combining circuits.

3) SW-10 series explosion-proof lighting switch S w-10 series explosion-proof lighting switch is suitable for dangerous places with ** gas mixture, in the circuit of AC 50Hz and voltage 220V, as a switch on and off lighting power supply potato rolling.

4) BCA series explosion-proof control button BCA series explosion-proof control button is a control switch in the explosion-proof control circuit electrical series, which can be reliably used in the most dangerous places in petroleum, chemical, metallurgy, military and other industrial enterprises for controlling contactors.

Relays, signal lights, etc.

5) H3 explosion-proof knife switch.

It is suitable for dangerous places with ** mixture, and is used as a cut-off or backup Zhengtong circuit in the line with AC 50Hz and voltage 380V.

6) CDD-G250 B400 Flameproof LampCDD-G250 B400 Flameproof Lamp is suitable for petroleum, chemical and other industrial environments with the highest quality mixture of places, it has a cast aluminum alloy shell, and the surface of the paint and tempered glass.

Cover. It has the advantage of being able to open the lid quickly and is easy to install.

7) AYD series flameproof fluorescent lighting fixtures 1Characteristics: fast persuasion, reasonable structure, convenient assembly and disassembly, high efficiency and energy saving.

Hello Zen Tong Mo, there are the following:

1.Increased safety type.

2.Flameproof type.

3.Oil-filled type.

4.Sediment-filled type.

5.Positive pressure type.

6.Intrinsically safe.

7.Special type.

Under normal operating conditions, it can not produce arcs, sparks or overheating that ignite the ** mixture, and take measures to improve its safety degree to avoid electrical equipment under normal and specified overload conditions.

I hope mine can help you He Dou, move the wheel and move the little hands to give it a thumbs up.

1. Preparation before starting:

A: Use the body to press the twist to start, first hit the far and near twist switch on the body in the near control position, and then connect the 2 wires and 9 wires of the wiring cavity to the ground respectively.

B: When using remote control, turn the far and near twist switch on the body on the remote control position, and remove the connection between the 2 wires and the ground in the wiring cavity. 9 wires remain grounded.

Second, the working principle: close the isolation switch GK, control the transformer TB through the insurance RD to obtain the power supply, the secondary 36V output, the motor comprehensive protector is electrified, 33 lines for the circuit insulation detection, if there is no leakage contact closed. Allow the switch to start.

1. Starting process during close control:

After pressing the starting button and twisting close to QA, the contactor coil 1 and coil 3 are directly connected. The circuit is as follows: TB-4-protector)-D1-coil 1-C1-coil 3-D4-6-Near Ta-near QA-near-2-ground-ground-9-TB.

The contactor contact C is closed and the switch is activated.

C1 is open (the coil 2 and the coil 4 are connected to the control loop), C2 is closed (the control path is used when the far QA is disconnected), C3 is disconnected (the connection between the insulation detection circuit and the main circuit is cut off to prevent the high voltage from entering the protection circuit), and C4 is closed (the interlock switch is allowed to start). 2. Self-protection and maintenance process

After the switch starts, the self-protection contact C2 is closed, and the high-current starting contact C1 is opened, and the switch is in the self-protection and small current maintenance state. [Circuit: TB-4-protector)-D1-coil 1-coil 2-coil 4-coil 3-D4-6-Near TA-C2-2-ground-ground-9-TB].

3. Stop:

When you need to stop, press the near ta to cut off the current path of the control loop. [C1 and C3 are closed, C2 and C4 are open, and they are ready for the next start]. Prompt: When the remote control starts:

Press the far Qa circuit as follows: TB-4 - protector ) - D1 - coil 1 - C1 - coil 3 - 6 - near ta - 1 (at this time, far and near are selected in the far position) - far Qa - far ta - ground - ground - 9 - TB remote control self-protection, maintenance process:

Circuit: TB-4-protector)-D1-coil 1-coil 2-coil 4-coil 3-D4-near TA-C2-2-TA-ground-ground-9-TB. Remote Control Stop:

Pressing either the far ta or the near ta can cut off the current path of the control loop.

That is, the possible ignition phenomenon is enclosed in a box with sufficient strength, and ordinary switches can become explosion-proof switches.