What is a fire strong cut and what does a fire strong cut mean

Fire strong cut: shunt tripper.

Essentially, it's a split coil plus tripper. This tripper is also used for thermal and electromagnetic tripping. Add the specified voltage to the shunt trip coil, and the circuit breaker will trip and open.

Shunt trippers are commonly used in the control of long-distance automatic power cut-off, and now the most used is the fire control room.

Cut off non-fire power supply. The circuit breaker can not be closed remotely immediately after the shunt tripping, nor can it be directly closed manually, and the circuit breaker must be deducted again before it can be closed, which is the same as the tripping after overload tripping. This is the difference between a shunt trip and an electrically operated switch.

There are three positions for the circuit breaker operating handle, except for the well-known two positions of the upper and lower parts, the handle will stay in the middle position after tripping. The so-called re-buckle is to pull the handle from the middle position to the minute position to re-hook the tripper, and then it can be closed.

The voltage types of shunt trip coils are AC and DC, and the voltage size has various voltage levels.

When cutting off the non-fire power supply, it is the most convenient and easiest to use the DC24V fire power supply as the shunt trip coil power supply. The shunt trip coil can only be energized for a short time, and it will burn out after a long time; Therefore, in the control loop, the normally closed contact of a circuit breaker should be connected in series, and the current of the shunt trip coil should be cut off after the circuit breaker trips.

The shunt coil is used to trip The closing coil is used to close the closing coil to close all the normally open and all the normally closed After the shunt coil is engaged (tripped) all the normally open is disconnected and all the normally closed is closed.

In the case of a fire, the linkage form of power supply through the control module to cut off the ordinary power supply circuit is called fire strong cut.

To be precise: in the state of fire, the non-fire-fighting power supply is cut off through the control module, and the linkage form is called fire-fighting strong cutting.

In the fire state, the non-fire-fighting power supply is cut off by the control module, and the linkage form is called fire-fighting strong cutting. In the case of a fire, to ensure that the fire will not be deflagrated again due to wire burning, a small relay is installed in the module, and the relay is attached to the fire-fighting strong current distribution box when the module acts.

Tripping and reaching a power-off state.

"Fire fighting" refers to the elimination of hidden dangers, the prevention of disasters, that is, the prevention and solution of man-made and natural, accidental disasters encountered in the process of living, working, and learning.

Question 1: What does it mean to cut off all lighting and power that is not related to fire fighting, which is generally called non-fire power cut.

Question 2: I see that some have the function of fire fighting, and some do not, when will the fire force cut? 1. The "Code for the Design of Automatic Fire Alarm System" has clear provisions on the strong cut of non-fire power supply.

For buildings equipped with automatic fire alarm systems and fire control rooms, the fire control equipment should have strong cutting functions.

2. There are no clear provisions in the fire protection code for building design and the fire protection code for the design of high-rise civil buildings, and only stipulates that special circuits must be used for fire power supply.

3. It has always been a controversial issue when the fire is strong. The purpose of the strong cut is to prevent fire and electric shock, and the other is to prevent the spread of fire caused by electrical wiring or other electrical facilities fire. There is no clear rule on when to force the cut, at the same time, the strong cut should also be within a certain range, my personal understanding is that the range that affects the development of fire and extinguishing the fire, in the actual operation to pay attention to grasp.

Question 3: What is the fire strong cut The linkage form of power supply through the control module to cut off the ordinary power supply loop in the fire state is called fire strong cut.

Question 4: Is the fire code a strong cut or a strong fire What is the fire protection strong cut The strong cut of the fire protection requirement is to cut off all the non-fire power supply after the first fire, and the strong start is to start the fire emergency lighting.

Question 5: What legend is used to represent the fire strong cut, and how to wire the fire strong cut is mainly carried out by connecting the input and output modules to the tripper, and the legend is only the legend of the input and output module and the distribution box As shown in the figure below, the specific wiring is as follows.

Question 6: How many wires can be cut by fire protection The fire protection needs to connect the four wires of the alarm line and the power cord.

Question 7: What is the problem of fire fighting? Your problem is mainly that the fire partition is not understood.

For example, it is divided by floor, which means that there is a fire on the second floor, and the non-fire power supply on the second floor is cut off, and Li Min is only asked to light up the emergency lighting on the second floor.

The fire partition was determined at the time of the original design.

Question 8: The difference between fire protection and non-cutting seems to come from the same meaning, but different professional fields have different names for it.

Question 9: Fire Fighting Cutting Problem Of course. According to the specification, the fire is to cut the non-fire power supply, if there is a need to cut the strong cut, set the strong cut. Strong cutting is mainly afraid of secondary disasters such as electrical fires caused by fires.

If you are doing design, you need to communicate with the user Party A, and there must be instructions before the design. If there is no special instruction, it is okay to follow the specification. If it is the installation and construction according to the drawing design to disturb the cover construction, if you have any questions, you can communicate and make modifications later. Anyway, blueprint modification is troublesome.

Question 10: Ask: What is the fire strong cut switch In the event of a fire, there will be a linkage module on the bus panel of the fire control room, which will directly cut off the domestic electricity and power supply of the place and start the fire backup power supply.

Legal Analysis: Requirements: A set of DC24V power supply relays as the action signal of non-fire electric cut-off need to be provided for non-fire-fighting power supply switches, and a set of passive normally closed point return spring backup signals need to be provided as the return signal of non-fire electric switches after the operation of the switch.

Legal basis: "Fire Protection Law of the People's Republic of China" Article 45 Fire and rescue agencies shall give priority to ensuring the safety of the lives of persons in distress by uniformly organizing and directing fire fighting at the scene of fire.

The commander-in-chief of the fire scene has the right to decide on the following matters according to the needs of fighting the fire:

a) the use of various water sources;

2) Cutting off the transmission of electricity, combustible gases and combustible liquids, and restricting the use of fire and electricity;

3) Demarcate warning areas and implement local traffic control;

4) the use of adjacent buildings and related facilities;

5) Demolishing or damaging buildings, structures, or facilities adjacent to the fire scene in order to rescue personnel and important materials and prevent the spread of fire;

6) Mobilize relevant units such as water supply, power supply, gas supply, communications, medical aid, transportation, and environmental protection to assist in fire fighting and rescue.

According to the urgent needs of fighting fires, the local people concerned shall organize personnel and mobilize the necessary materials to support the firefighting.

Fire protection is to cut off the non-fire power supply.

The purpose of the control of the non-fire-fighting power supply is to reduce the continuous development of the fire and reduce the electric shock accident caused by the extinguishing of the fire hydrant. Non-fire-fighting power supplies include electricity for equipment such as general lighting, domestic water pumps, and air conditioners. When reporting the fire alarm and the initial stage of the fire, it should be cautious to treat the non-fire power supply, especially the lighting power supply, and try to minimize the chaos caused by the power outage.

When it is confirmed that a fire has actually occurred, the first thing to do is to cut off the power supply of the air conditioner and ventilation system that is not related to fire fighting, as it may contribute to the fire and there will be no impact on people after the power is off. To treat the power failure of the lighting power supply, the emergency evacuation lighting should be started first, the lighting power supply in the fire area should be cut off, and then the lighting power supply in the fire zone around the fire area should be cut off, and the power supply should be cut off step by step with the development of the fire to reduce the chaos.

The automatic fire alarm system is made up of a trigger device.

du, fire alarm.

Device zhi, joint dao

Dynamic output device and other special auxiliary functions.

It is composed of a device, which has the ability to produce smoke, heat, flame and other physical quantities produced by combustion in the early stage of the fire, through the fire detector into an electrical signal, transmitted to the fire alarm controller, and at the same time in the form of sound or light to notify the fire layer and the upper and lower adjacent layers to evacuate, the controller records the location and time of the fire, so that people can find the fire in time, and take effective measures in time to extinguish the initial fire, and minimize the loss of life and property caused by the fire. It is a powerful tool for people to fight fire. The forced shut-off function of the automatic fire alarm has the following linkage relationships:

1. Fire alarm self-check function;

2. Silence and reset functions;

3. Fault alarm function;

Fourth, the fire priority function;

5. Alarm memory function;

6. Automatic conversion of power supply and automatic charging function of standby power supply;

7. Under-voltage and over-voltage alarm functions of standby power supply.

Firefighting strong cut"is a firefighting term that is often used to describe the emergency measures taken by firefighters to quickly control the spread of a fire during a fire rescue process.

"Strong cut" refers to cutting or breaking into a building or fire scene in order to control the fire more quickly, rescue trapped people, or perform other first aid tasks. Typically, firefighters use special tools and equipment, such as cutters, crowbars, hammers, etc., to quickly open the passage of buildings or obstructions and enter the fire scene.

The purpose of fire fighting is to quickly extinguish the fire and rescue operations, reduce the time and opportunity for the spread of fire, and protect the safety of life and property. In fire rescue, time is of the essence, and firefighters need to assess the fire and the structural stability of the building, and judge whether to take strong measures based on the conditions and conditions of the site. At the same time, they must also follow fire safety procedures to ensure their own safety and the safety of others.

Firefighting is a complex and dangerous task that requires firefighters to have professional knowledge, skills, and experience. As such, the term is often used to describe the swift response and courageous actions of firefighters in firefighting and rescue operations, reflecting their efforts and sacrifices to protect lives and property. Firefighting shows the professional ability and rescue spirit of firefighters, which is one of their important jobs.

Summary. Kiss <>

We'll be happy to answer for you. The reason for the installation of fire control cabinet is that when the fire comes, start the fire control cabinet at the first time, start the rescue and disaster relief, and cut off the fire power supply at the same time when the control cabinet receives the fire alarm and starts the fire pump, so as to avoid most of the electrical appliances secondary fire incident. And reduce the number of electrical appliances that are burned, thereby reducing the difficulty of extinguishing fires.

Therefore, it is very necessary to install a fire strong cut in the fire control cabinet.

Install a fire force cut.

Kiss <>

We'll be happy to answer for you. The reason for the installation of fire protection is that when the fire comes, the first time to start the fire control cabinet, start the rescue and disaster relief, and at the same time cut off the fire power supply of the liquid collapse fire pump at the first time when the control cabinet receives the fire alarm. And reduce the number of electrical appliances that are burned, thereby reducing the difficulty of extinguishing fires.

Therefore, it is very necessary to install a fire strong cut in the fire control cabinet.

Extended information: fire protection refers to the fire department in accordance with the "Fire Protection Law" and other laws and regulations, fire safety facilities and equipment, fire safety management, etc., and do not meet the requirements of the units and individuals to take mandatory precautions to ensure fire safety. Objectively speaking, the purpose of fire protection is to ensure fire safety, ensure the normal operation of fire safety facilities and equipment, prevent fires, and protect the safety of people's lives and property.