The lighting shield (SHO) is intended for the reception, as well as the distribution of electrical energy up to 380 volts with a frequency of 50 Hz. Usually shields are installed in residential, administrative or other types of houses. Thanks to the installation of such shields, you can provide protection against overload and short circuit currents.
Sho
In this article, we looked at the features and design of lighting shields. You will also learn how to install lighting shields with your own hands.
School classification
In modern lighting shields manufacturers install special devices for protection against current leakage, automation, control and monitoring items. For mounting items should use DIN rails. As a material for the hull, ucho use:
- Metal.
Metal lighting shield
- Non-flammable plastic.
Plastic sho
Metal enclosures are usually used for shields that will be installed in the future. Such shields will have high IP protection from the influence of environmental factors. To extend the service life of the metal shield, you need to use paint coatings. Due to high security, such shields are installed on all objects where an increased danger is present. In addition, metal shields have a special mount for connecting a grounding wire.
Scho from non-combustible plastic possess aesthetic appearance and are suitable for installation indoors. Plastic of such shields does not completely distribute burning and does not require grounding. Depending on the type of installation, such shields can be:
- attached;
- built-in.
Hinged structures can be used for production workshops or auxiliary premises. Built-in lighting shields have an attractive appearance and are suitable for installation in residential buildings, where the aesthetic issues are paid to the lot of attention.
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Design and equipment
If we consider the design in more detail, then it can be understood that it provides for a switchbar on which switching machine controls will be located:
- a variety of automation elements;
- automatic switches of exhaust lines;
- Automatic input switches.
Manufacturers today produce a variety of dimensions, the number of plug-in lighting lines, as well as power. Convenience of mounting allows you to provide a DIN rail.
Design of lighting shield
Most shields are equipped with a special door, which prevents unauthorized access to switching devices. Using additional devices, you can specify programs that include and turn off the lighting at a given time. This contributes to the savings of electrical energy and maximum automation of the disconnection process.
To control the isolation of lighting networks and prevent the emergence of fires recently use a variety of insulation leakage control devices. Special devices timely turn off the damaged electric portion without a violation of the normally functioning sections of the electrical circuit.
Use lighting shields
Lighting shields can be used not only in enterprises, but also in everyday life. They allow you to immediately turn off the lighting devices in the event of freelance situations. To achieve a larger effect, it is necessary to compact contactors and switches. Access to such devices can get all groups of persons. Each door in the shields has a comfortable castle that will prevent unauthorized access.Power pads of portable lighting devices
No more than 50 volts should be used to power portable luminaires in rooms with increased danger. For its conversion, use lower transformers. For such transformers manufacturers produce special shields that contain in their composition:
- lowering transformer that corresponds to the required voltage;
- circuit breaker to protect the high voltage transformer winding;
- circuit breakers that will protect the discharge lines;
- A socket for connecting portable lamps.
Yatp-0.25
In addition to the cluster, cable lines leading to stationary lamps can be connected to the housing. The supply voltage of the lamps is not higher than 12 volts can be used in the following cases:
- Close premises.
- With an uncomfortable position of the employee.
- There is a constant contact of the employee with metal structures.
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To save your means to install a lowering transformer in a regular shield. To do this, select the appropriate model of the transformer and proceed to the installation.
Outdoor lighting shield
From a regular panel, such a device is distinguished only by the fact that there are automatic or manual lighting devices. To ensure automatic control of outdoor lighting, use:
- Photorele;
- motion sensors;
- Sound sensors;
- annual relays;
- Relays that control the inclusion of lighting depending on the geographic coordinates of the place where it is installed.
Manual control mode may be required in the following cases:
- repair of the lighting network during the daytime;
- inclusion of lighting with a faulty relay;
- Enable lighting when conditions are not respected to trigger the relay.
SHNO-400-6 / 1000-D
To go to manual lighting control mode, special switches are used. Sensors that are needed for control are located in places comfortable for work. Manual control can be carried out in the following ways:
- One of the positions of the manual control key.
- Switch outdoor or internal installation.
- Push-button station.
Scheme Pisno
If the load that connects to the shield exceeds the maximum allowable norm, then the connection is carried out through the starter. In this case, the relay will control the enlargement of the starter, and it will turn on the lamps. Such lighting shield is labeled as "Scho".
Emergency lighting shields
Emergency lighting is now a fully automated system. It has independent meals and stretches from the introductory switchgear. Emergency lighting shields Manufacturers are denoted by the contraction of "SHAO" with further addition of the sequence number. For example, "SHAO-1" or "SHA 2-1". Emergency lighting lamps must be dispersed among lamps of ordinary lighting. After disconnecting the main power after a certain time, they automatically turn on.
In contrast to the working light, the emergency you cannot disable manually. It either will be enabled constantly or join after the automation is triggered using a magnetic starter.
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Now you know what kind of design has lighting shield and where it is used. We hope that this information was useful and interesting.
The process of installing the lighting flap.