If you want to use power supply with the presence of high-current circuit breaker set.This device controls the switching on and off the network, without creating a heavy load.On the peculiarities of use and installation circuit breaker discussed later.
- Features and device-switch
- principle and function of circuit breakers
- circuit breaker main types of circuit breakers
- recommendations operation and installation circuit breaker
- Installation and wiring diagram circuit breaker transition
Designfeatures and device-switch
One of the non-automatic communication devices is a switch.This device is used during the opening and closing an electrical circuit.
There are several types of circuit breakers, differing parameters and device structure.Knife with single-pole, double-pole and three-pole execution have poles, which are characterized by the presence of a fuse.Some circuit breakers do not have poles, they drive lev
design circuit breaker depends on its type.For example, devices with only a central handle disconnect electrical circuits.IMPERATIVE before disconnecting an electrical circuit with such a circuit breaker is its blackout.
Standard knife switch device characterized by:
- contact type knives;
- inserts a smooth type;
- racks combinations and the contact type;
- terminals through which the connection circuit breaker.
These parts are mounted on the panel for general use.
Most circuit breakers consists of a series of combined and single row of contact stands.To ensure smooth pushing lever mechanisms use springs.
Racks nature have combined washer specific purpose, which provide them with depression.In such devices is due to the binding of the blades having a common axis.Tyagi, promote movement of the axis.Knife, in a central location of the lever work thanks bracket that connects with the contact blades and their axis.
Switches are distinguished by a special notation:
- P - switch to the presence of a central handle;
- RB - switch to the presence of the side handle;
- P P P - switch to the presence of the central drive;
- RP B - side switch drive lever.
the presence designation RB 2 1 - the value of the first digit indicates the number of poles, in this case, two, and the second digit indicates the rated current of the unit, one hundred amperes;If the second digit is 2 - it means the current is 220 watts.
principle and function of circuit breakers
main part of the circuit breaker panel appears, which is made exclusively of dielectric materials.On the set a few racks and sponges.Knives circuit breaker is an electrical movable contact, which is rigidly secured to the shaft device.
During switching on, knives tonkoprovodyaschego type installed in the sponge, which are fixed parts of circuit breaker.All workers are connected and there is a pole of contacting each other.
design depends on how the circuit breaker switch on.There are circuit breakers lever drive, in which the blades start to move by turning the lever.The second type of circuit breakers - a device to the presence of the central arm.They are used exclusively for the shutdown circuit, under voltage.
Many current circuit breakers are equipped with the additional function of providing electrical safety.This function is the security lock of the front door, located in the working position.
Scope circuit breaker
1. The use of circuit breakers associated with switching on and off the electrical load on the network, where there is a large amount of current.
2. Knife open type used to make or break electric circuit without a load.
3. Switches to the presence of arms, on the contrary, are used in electrical circuits with a large load.
4. Provided that the cutout has a central housing, it is used as starting apparatus of an electric motor.
5. Knife central side or lever type used for the central switchboard.
6. Knife used for infrequent automatically turn on or off a circuit.
7. Switches to the side, central handle is used in the electric power does not exceed 500 watts.
8. Knife is used for mounting on the switchgear cabinet or switchboard, as control circuits or power circuit.
9. Installation of some models is made directly to the power transformer.
basic types of circuit breakers
Depending on the basic thermal current release breakers:
- 1000 A,
- 900 A,
- 800 A,
- 700 A,
- 600 A,
- 500 A
- 400 A,
- 300 A,
- 200 A,
- 100 A.
Some models are equipped with a protective cover, which allows them to operate with rated current greater than 1000 A
Depending on the number of poles divided breakersto:
in relation to the direction and the switching current:
- rocker type - the most simple and previously produced device, they are able to switch large amounts of electric lines and in most cases require the presence of two states: on and off;
- breakers rotary actuator are easy to install and use, and are the most common;
- isolating circuit breakers are the type of protective enclosure, small size and short handle.
Depending on the availability of the arc isolated breakers:
- with the possibility of redemption of such a system, these devices are able to independently turn off loaded network;
- with the absence of such a function, such devices cut off the network only after the load is removed.
in proportion to the degree of protection circuit breakers are divided into device:
- open execution, which are located in a special box, and the lever is in the exterior;
- closed execution.
Depending on climatic performance isolated circuit breakers with the presence of moisture protection, heat-resistant devices and circuit breakers are designed for installation in the interior of the room.
Depending on how the plane is joining clamping devices emit circuit breakers with parallel and perpendicular arrangement.
recommendations operation and installation circuit breaker
1. Please install the unit only indoors.
2. Protect the main switch against moisture, adverse weather conditions and precipitation.
3. recommended environment location and operation of circuit breaker is -40 to +55 degrees.
4. Do not install the switch in the conditions of stay of factors that produce dangerous or polluting substances.
5. When burning the surface contact of the knife should be cleaned this place with a file or a glass paper.
6. When entering leaky knives in the sponge should be conducted podgibaniem sponges.
7. To avoid distortion of legs knife switch, inspect the bolts that secure the switch to the bar, and, if necessary, tighten them.
8. ALWAYS check circuit breakers for the isolation of its individual parts.Clean and paint the repaired parts.
Installation and wiring diagram circuit breaker transition
Consider the basic guidelines for installing the circuit breaker on the generator.Generator device allows additional electricity during a power centralized power supply.
Installation circuit breaker will allow to receive electricity from the mains and from the generator, and possibly in parallel.
generators based on diesel or gasoline are equipped with load switch, which regulates the operation of the device automatically.If you use contactors with the presence of deadlock, the risk of the inclusion of the two phases is completely absent.
To provide rephasing manually, set the switch transition, which allows you to control this process with the help of two positions.
installation of circuit breaker switchboard is done in the room or near the main switchboard.The main feature of the circuit breaker acts as the power current that passes through it myself at work.
Once detected the disappearance of the main purpose of the network, run the generator, and then produce a circuit breaker switch to the operating position.
When the main power supply is restored, the switch is switched to the off position.
If necessary, the uninterrupted power supply in addition to the generator set should include installation of an uninterruptible power supply to the presence of batteries that have a reserve of time from 120 to 600.This device has a high value equal to the value of the generator set.
The simplest scheme is a single-phase circuit breaker requires a specific power input of the generator.In this case, the switch should be set to the presence of the two poles and the opening machine on the network.
When placing a diesel or gasoline generator indoors contemplate hood.
If the generator can not cope with the entire power supply floor space, need to install a more complex circuit breaker switch.The entire circuit is divided into two parts.The first includes a mandatory power of consumers, such as a computer, a refrigerator, light.The second contains an optional extra food.
use rocker-switch is unsafe, so be sure to take care of the presence of switches that have their own wiring.
switch has three positions:
- core network,