Dual-control home-installed switches are more common in home-installed circuits, and the wiring is relatively simple. Today we will take a look at the dual-control home improvement switch for everyone to explain how to connect the two control home improvement switch ?
Before introducing how to control the dual switch, let's first understand what is the dual switch?
At the same time, the switch has two normally-open and normally-closed contacts. In short, two switches can be used at the same time to control the on-off power of lamps and other electrical appliances. Usually used in the stairwells, of course, the bedroom entrance and bedside. This design can be very good to avoid the trouble of switching lights.
Before understanding the wiring diagram of the dual control switch, we are popularizing a common sense knowledge:
From the structure of the switch, "link" refers to a moving contact or a movable contact knife, "control" refers to a stationary contact, and single-link dual control may also be referred to as a "single-pole double-throw" switch. "Pole" and "Link" indicate the number of movable knives. Usually we will use the "pole" when describing the linkage between the switch and the switch. For example, there are 4 buttons on the concealed panel switch, but four single switches. There is no connection between them, so we call four single-switch but power commonly used three-phase air switch, because each phase has the same share of the same contact, so we call three-pole switch.
How to double switch?
On the three terminals of the switch, the moving contact is connected to the red line, and the two points of entry are connected to the fire line. Another switch, two static contacts electrically connect the two outgoing lines from the previous switch, and the moving contact appears on the zero line. Lamps. Some people often connect the two moving contacts of a switch to a loop, and the zero line static contacts appear on the fixture. This way is wrong and not standardized. Found to promptly get rid of.
Information on the home improvement switch was introduced here for everyone. I hope this article will be helpful to everyone. If you still have something you don't understand, you can leave a message to Xiaobian at the bottom. We will answer your questions as soon as possible.
Switch socket switch switch socket installation
Three-dimensional earthwork mat is a kind of three-dimensional mesh fabric made of polymer composites. The texture of the earthwork mat is loose and pliable, with 90% of the space to fill the soil and sand, and the root system of the plant can grow through the mat. The grass skin that grows hind makes net cushion, grass skin, soil surface firm together. The root system of plants can be reached under the surface of 30-50cm, thus forming a solid green composite protective layer.
Earthwork mat is a new type of earthwork synthetic material which is suitable for soil and water conservation. It can effectively prevent soil erosion and increase the green area and improve the ecological environment.
Function:
1.Alternative concrete, asphalt, slab stone and other slope protection materials, mainly used for highway, railway, river, embankment, slope and other slope protection.
2.The soil can be protected from wind and rain before it grows up
3.The compound protection layer formed after the plant grows can withstand high water level, and hurried water flow.
4.The cost of the project can be greatly reduced, and the cost is only 1/7 of the concrete protection slope and the slope of dry masonry, and 1/8 of the slurry masonry stone.
5.Due to high polymer materials and UV anti-stabilizer, it has high chemical stability and no pollution to the environment.
6.The construction is simple, after the surface level is flat, can be constructed.
Application
When construction can use small bamboo pole or small stick to wear in the whole coil net cushion, spread out to pull out stick, surround with bamboo nail, wooden nail or plastic nail, the nail distance is 30cm, each square meter 10 nails.
The length of nails is generally 15cm (from the ground), and the loose surface should lengthen the length of nails. When laying in the high slope, the length of the nails used should be longer than the length of the nail in the lower slope.
The topographic mutation or the terrain is more complicated, should be careful to keep the net pad level, and to increase the nail density.
Attention lap. The lap length is 2cm, the connecting pin should be nailed in, the density of the nail should double, and the upper layer of the lap joint should be close, without leaving the gap.
In the shape of the nail, the upper end of the nail should be greater than 2 times the diameter of the mesh, so that it can also have a vertical suppression effect.
Seed sowing depth should be according to the soil information, adjust measures to local conditions, grass should choose to suit the local climate conditions, root length, and rich grass seed, have long roots of perennial small shrubs in between is better.
Grass seed seeding depth should be in the mat, so as to enhance the effectiveness of the compound protection layer.
After seeding, the topsoil cover should be covered by covering the net. Don't expose the mat to the sun. However, it is important to take care of the seed germination and growth.
After seeding, the water content of the upper layer should be 40 to 50%.It is pressurized on top surface to help seed germination.
10.When the net mat is laid at the top of the slope, the vertical joint of the net cushion should be 60 degrees and buried 30cm in the soil. Bottom should be over 50 cm level, because of the side slope engineering of the water content was much lower than the lower layer, is not conducive to seed germination, gauze pad should be in the 20 cm suitable holding open a ditch, top place for irrigation.
11.The timing is the key to the whole project (when used on the slope), usually in the first three to four months before the rainy season. Let the turf have some time.
Notes:
1.Cannot be used as the surface protection material.
2.Only the surface planting grass slope, cannot use as deep reinforcement material.
3.When used for river slope protection, the construction should be completed in the first three months of the rainy season. In order to ensure the high water level above the grassy slope is firmly formed.
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ZHEJIANG BOYA COMTECH CO.,LTD , https://www.zjbytx.com