Output waveform classification

Output waveform classification
(1) square wave inverter
AC voltage square wave inverter output waveform is a square wave. Such inverter inverter circuit used is not exactly the same, but the common feature is relatively simple lines, a small number use the power switch. Design pure sine wave online ups is generally between one hundred watts to kilowatts. Advantages square wave inverter is: Line is simple, cheap, and easy maintenance. The disadvantage is that due to the square-wave voltage contains a large number of high-order harmonics, resulting in additional losses in the load appliances with core inductor or transformer in on the radio and some communications equipment interference. In addition, these inverters also pressure range is not wide enough, the protection function is not perfect, the noise is relatively large defects.
(2) step wave inverter
AC inverter output voltage waveform of such a stepped wave, a stepped wave inverter output is also to achieve a great variety of different line number stepped difference, the output waveform. Advantages step wave inverter, the output waveform for example, a significant improvement in waves, reducing high harmonic content, when the ladder when you reach 17 or more can be achieved quasi-sinusoidal output waveform. When using transformerless output, high overall efficiency. The disadvantage is that the ladder wave superposition line using the power switch more, some of which also require multiple sets of lines in the form of a DC Ups power manufacturer input. This gives a balanced group with wiring and battery charging solar phalanx were trouble. In addition, voltage step wave radio and some communications equipment are still some high-frequency interference.

Installation of pipe clamp

Installation of pipe clamp
(1) pipe clamp plate is generally directly or via angle bracket welded structures, etc., in the concrete floor or wall surface side of the bracket with expansion bolts;
(2) pipe clamp installation should pay attention to leveling, is installed on the same surface height;
(3) pitch pipe clamp: When the diameter ≤φ10, about 0.5 to 1 m; diameter φ10 ~ 25 at about 1 to 1.5 m; diameter φ25 ~ 50 at about 1.5 to 2 meters, but at a right angle bend, both sides should each with a hose clamp.
Pre-installed
(1) The fittings and equipment, pipes and pure sine wave online ups piecewise connection, until completion of all pre-installed;
Installation Method (2) pipe fittings are detailed in Chapter 4;
(3) while the hose clamp plate welded to the structural member or holder, not the tube welded pipe clamp or bracket;
(4) pre-installed and checked passing mark on the line print tie, one of a number tabulated spare. After removing the pipe cleaning, restoration by number.
Precautions
(1) Before installing the pipe can press all the requirements in Chapter 9 pickling, especially steel and bite type fittings connection should be pickled, then ferrule tube end pre-fastened;
(2) All fittings should be cleaned with kerosene to be installed inside the o-ring should be temporarily removed custody, to be put on when the formal installation;
(3) To keep the oil port construction pumps, dispensers and other equipment, Home ups, pipe end and other openings to clean, can not let water, dust and other foreign matter from entering;
(4) should be in a free state pipeline laying, pipe welding after not apply excessive force fixed radial force and connections;
(5) bearing hole should check in advance, whether inside the oil flow, whether the oil port with threaded fittings to match.

 

A DC voltage to be consistent

A DC voltage to be consistent
Each inverter has a DC voltage value of the access, such as 12V, 24V, etc.,
Inverter
Asked to select the battery voltage must be consistent with the DC input voltage of the inverter. For example, 12V 12V battery inverter must be selected.

2, the inverter output pure sine wave online ups must be greater than the use of electrical power, especially when starting power for large appliances such as refrigerators, air conditioners, but also to stay bigger margin.

3, the positive and negative must be connected correctly
Inverter DC voltage marked access positive and negative. Red is positive (+) and black is negative (-), also marked on the battery positive and negative, red is positive (+) and black is negative (-), must now take the time to connect the positive (red pick red) and negative to the negative (black pick black). Cable diameter must be rough enough, and to minimize the length of the cable.
4, should be placed in ventilated, dry place to guard against rain, and with the objects around distance of more than 20cm away from flammable materials, or cover other items should not be placed on the machine, the ambient temperature is not greater than 40 ℃ .
5, the charge can not be performed simultaneously with the inverter. That will not be charged when the inverter output plug into the electrical circuit of the inverter.

Hydraulic fittings standard

Hydraulic fittings standard
First, the assembly sleeve type pipe joints
(A) the most important part of pre-installed ① bite type pure sine wave online ups, the direct impact on the reliability of the seal. Generally require a dedicated pre-heater. Small diameter joints can be pre-installed on the vise. In practice, as a parent with a connector, the nut, ferrule can be pressed onto the tube. There are straight pipe joints card sets, card sets Straight turning heads, sleeve tee pipe emergency power ups and other types. I found that even in the same factory shipment, these types of connector body tapered hole depth is often not identical result is a leak, and this problem is often overlooked. The correct approach is to end what kind of pipe joint body, connecting the ends of the corresponding pre-installed with the same type of connector, which can maximize avoid leakage. ② pipe end should be flush. After sawing the pipe should be ground flush with the wheel and other tools, and deburring, cleaning with high pressure air blowing before use. ③ When preloaded, you should try to keep the coaxial tube and connector body, if the tube is too large will cause deflection seal failure. ④ preloaded force should not be too much of the inner edge of the ferrule just embedding the tube wall, card sets should not have significant deformation. During pipeline connection, then the provisions of the tightening force assembly. ф6-1 card sets tightening force of 64-1 15n, 16фmmr 259n, ф18mm to 450n. If at the time of pre-deformation serious bite, will lose seal.
(B) Prohibition adding sealant filler. It was sealed in order to achieve better results, put the card coated with sealant, sealant is the result into the hydraulic system, causing clogging of hydraulic components overcast Nigeria and other failures.
(C). When the connecting pipe, the tube should have sufficient deformation margin, to avoid that the tube is subjected to tensile force.
(D) When connecting pipe, it should be avoided by the lateral force, lateral force caused Mifengbuyan over the General Assembly.
(E) When connecting pipe, disposable good should avoid multiple demolition, otherwise it will seal performance deteriorated.