2015年1月5日星期一

DBJ08-20-98 household electric equipment should meet the following standard

full load 75% load 50%load three phase induction electric motor Y series B35
Specifications
-One year warranty 
-Within 25 days delivery 

-Life: 5-7 years
9, 3 phase induction motor residential telephone communication pipeline must be to the home, diesel generator household telephone into line should not be less than two on. Small set of telephone socket should not be www.facebook.com/guohong.trading less than two, medium, large sets of telephone socket should electric water pump be not less than three. With the popularity of home computers, each pair of 3 phase induction motor lines already cannot auto spare parts satisfy the need, therefore every phone into line should not be less than two right, one of the corresponding to the computer table, to meet the needs of the Internet. 10, power, phone, TV circuit should be ac synchronous generator dark apply flame retardant plastic tubing. Such as telephone and television elv lines and steel tube can be applied to protect, the power cord with flame retardant plastic pipe protection. 11, electrical circuit should be adopted to meet the requirements of security and fire prevention wiring installation way. Wire copper wires should be adopted. Family pack in AC motor the horizontal lines were converted to wear magnetic generator dark apply, both meet safety and meet the requirements of fire prevention.

2015年1月4日星期日

Duplex double switch wiring diagram

iron motor shell motor parts pig casting iron 
Specifications
1.iron or steel 
2.sand casting 
3.ISO,UL,FM,LPCB,VDS,TS16949 
4.timely delivery 

5.reasonable price 
From the structure of the switch, "al" means moving contact (or moving contact knife), also have a group called "the knife"; "Control" means the static generator price contact, there are also called the www.dongfeng-motor.com static contact (" a "or" throwing "), as a result, single league double control can also be called "single- pole double-throw switch". "A" and "lian" confusing, anode and union says the number of moving contact knife, but we need to show the linkage relationship between the switch and switch with a "very", such as dark there are four buttons on the panel auto spare parts switch, but there squirrel cage induction motor has been no contact between four single switch, so we call SiLianChan switch, but commonly used three-phase power with between diesel alternator generator generator set air switch for each phase with close contact, so we called three pole switch. This kind of connection mode is more simple, one kind is the formal approach: three terminal in the switch, moving contact wire into the line, two static contact wire strands, another switch, two static contact meet before a switch to the two stages, moving contact line and zero line on lamps and lanterns; Another kind of nonstandard practice: two switches on the moving squirrel cage induction motor contact of all ac acmotor2.blogspot.com motor access to the same circuit, the zero line, two line on the static contact to the lamps and lanterns.

The role of voltage transformer and current transformer


The high voltage proportional relationship to transform the 100 v or lower level standard secondary voltage, for the use of protection, measurement and instrumentation. At the same time, the use of voltage transformer can be high voltage and electrical isolation. Although also be in accordance with the working principle of electromagnetic induction voltage transformer equipment, but its electromagnetic structure compared with the current transformer is just the opposite. Voltage transformer secondary circuit is high impedance circuit, the size of the secondary current is decided by the impedance of the loop. Secondary load impedance, small secondary current increase, makes a in a component of current automatically to meet electromagnetic balance of the relationship between the primary and secondary side. A voltage transformer is, as it were, structure and using a limited form of special transformer. Electromagnetic single phase motor current transformer is widely used in power system (hereinafter referred to as "current transformer"), its working principle is similar to the transformer. 

The principle of current transformer wiring, as shown on the left. The characteristics of the current transformer is: (1) a coil in series in the circuit, and as a result, the number of turns in a coil current depends on the load current of the circuit under test. And has nothing to do with the secondary current; (2) current transformer secondary coil of the current meter and relay to the coil impedance is 220v 1.5kw ac motor very small, so under normal circumstances, current transformer run in to a short-circuit condition. The ratio of the current transformer primary and secondary rated current, called the rated mutual acmotortrading.blogspot.com inductance of the current transformer ratio: kn = I1n/I2n Because of one coil rated current I1n standardization, secondary coil rated current I2n unification of 5 (1 or 0.5), so the rated mutual inductance current transformer ratio have also been standardized. Kn can be approximately expressed as transformer primary and secondary winding turn ratio, namely the kn material kn = N1 N2 / type of N1, N2, for one, two coil number of turns.

The choice of motor with contactor


3 Phase induction Electrical Motor MS Series for winding machine

Specifications
ambient temperature:-15 -40 
above sea level : not exceed 1000m 

rated voltage:+-5% 
Contactor shall be chosen principle: (1) by using the categories to choose: in the actual production, the water pump vast majority of cage motor use, diesel engine basic belongs to the category is chosen according to AC - 3 use. (2) to determine the level of capacity: the capacity of the contactor or main contactor under rated voltage 3 phase induction generator motor and other technical conditions, the determination of the rated current, attention should be paid to the following points: 1) the influence of duty and working frequency: when choosing contactor, attention should be paid to the control object is a long-term work week, or repeat short work. In the operating frequency is high, but also increase squirrel cage small diesel engine induction motor the contactor of the rated current capacity must be considered. Should as www.dongfeng-motor.com far as possible choose silver, silver or silver contact contactor, such as the KSDZ - U series products. 2) the influence of environmental conditions: production process environment is bad, dust pollution is serious, poor ventilation, and higher temperature in the workplace. To the choice of contactor should be taken down, let the use of technical measures. ac synchronous generator Contactor for rated current of the quick: watch a Y180L - 4, 2 kW motor, for example, from a quick table should check with U60 type contactor. The motor rated current 60 a, rated current 60 a contactor, according to the general AC alternator generator - 3 work category, the contactor to control power of 30 kw 380 v motor, control 380 v 22 kw motor, now belongs to let use reduction.

2014年12月28日星期日

Cable, bus bar installation does not conform to the requirements


small motor spares suppliers of motor parts 

Specifications
1.20 years fan&motor manufactruer 
2.We can open mould&punch&diecast&finish&winding 

3.competitive price,high quality 
L, phenomenon (l), listed cable is installed is not regulated, and water pump price cable clutter in cable trench, bridge. (2), in the shaft, the cable hole wall sealing is not tight; Vertical fixed cable bracket is too small, too soft, downward sloping. (3), cable through the tube after not single phase motor sealing tight. Line (4), terminals (ear) is too big or too small, the wall is too thin, when pressure joint fracture. (5), the plug box installation of busbar is not straight, paragraphs bus is too long, not easy to transport and install. 2, (1) analysis of lamination the causes, the cable was not coordinate construction units, but their laying cable can pass. (2), and the construction unit in block heavy current generator shaft without good coordination, construction personnel don't master the plugging ac synchronous generator technology. (3), the material didn't pass the exam, purchasing personnel is not in accordance with the standard purchase cable fixed bracket and terminal in line (ears). (4), building professional for high voltage electrical professional do the area of the shaft is too small, result in heavy current shaft arrangement difficult. 

three phase induction electric motor Y series B35 1.5KW 2.2KW 37KW 75KW
Specifications
-One year warranty
-Within 25 days delivery
-Life: 5-7 years
3, preventive measures (1), and to coordinate between cable construction team, cable were lined up to the size and position, after the installation with moistureproof and anticorrosive card listed, indicating a variety of cable line number, type, specification and all points. On location is: the cable terminal head, turn in philosophy, mezzanine, the ends of the shaft, in cable trench technology hole manpower, etc. (2), with hemp yarn and asphalt mixture sealing shaft cable through the mouth of alternator generator the cave, there is outside into the door to the basement, the nozzle will be waterproof processing, and these needs and civil engineering professional work closely with. Clean up the site after diesel generator set the seal. (3), procurement to buy cable between round fixed bracket, terminal line (ear), and other materials, must be standardized in accordance with the purchase. When pressure joint, accurately choose the corresponding hydraulic clamp and the corresponding suite. (4), bus order, must ensure that each busbar shall not be greater than each floor high; Generally no greater than 3 m, to facilitate the handling inside the building and installation. (5), bus and accessories comes into play, we will acmotor2.blogspot.com strictly according to the GBJ149-90 "electric device installation bus device code for construction and acceptance and inspection of the contract. (6), install water pump price the plug box, horizontal flat vertical, reliable, solid contact with bus. Nine, indoor and outdoor cable structures and cable is not in conformity with the requirements l tube, phenomenon (1), in cable trench and concrete support installation is not flat, easily broken. (2), in cable trench, cable pipe drainage not free. (3), the buried depth of the cable passing enough, bell is broken, irregular. (4) the uneven, steel rust anti-corrosion paint, sealing especially pipe rust and corrosion is not doing enough. (5), grounding is not flat, loose, in cable trench and passing tube, not comprehensive, part of the leaking pipe welding.

The use of 60 hz import motor and power supply design

 In the early 90 s, a rubber manufacturing company the five sets imported from North America (second-hand) rubber equipment, there are two production Farrell 11 d mixer and a SL sullair company - 32 type screw air compressor. Basic situation of the three electrical motor 12v 1000w devices test is good, according to the production requirements, companies need to benefit installation fan motor commissioning as soon as possible; But the use of these equipment there is a big technical problem: the driving gear of these devices is 60 hz five sets of high voltage motor, not directly into the 50 hz power grid of our country. But if all replacement for domestic 50 hz, 6 kv motors and high voltage, need to increase cost nearly 1 million yuan. In order to solve the technical problem, technical personnel for imported equipment of acmotortrading.blogspot.com the power supply system, switch gear, motor parameter and so on has carried on the earnest analysis and calculation, decided to adopt frequency conversion principle, tinkering with the system power supply design.

The starting current of the machine

 China export motor lamination shaft rotors 
Specifications
1. Lamination of electric motor 
2. IP54 class F 
3. 100% copper 
4. Silicon steel stamping 
5. Stunning performance
The motor starting current is www.facebook.com/guohong.trading not a fixed value, in the process of motor starting, from big to small changes in the current, is the reciprocal function of time (I diesel engine = I + I/(a - t)). There is no specific formula. diesel generator Basic not just plug in the electrical impedance, only impedance, also is the dc resistance of the coil, this number is very small, so the instantaneous current is very big, can be rated current of dozens of times, but the duration is very short, usually only zero point zero seconds. As the rotating motor, a sharp drop in the auto spare parts current, if not on load 3 phase induction motor startup, will be in 1 seconds to around 10 times the rated current, along with the speed rise, after 2 single phase motor seconds can be down to 2-3 times, then continue to fall, until it is equal to the rated current, the motor speed also rose to rated speed. 

TYG series rare permanent magnets three phase synchronous motor
Specifications
1. a replace of Y motor 
2. larger output 

3. save energy
So, motor starting current is refers to the average. Because different machine, different load and different ways of start, start time required is not the same, there is big difference between the average current. For large motor, you need to start the process of current time function for diesel generator set detailed calculation, to determine the circuit breaker protection fixed value setting. Generally small under 40 kw motor, is does not provide protection for the boot process, so the choice of circuit breaker, so long as can avoid starting current impact. Due to the action of circuit breaker is time-limited, 4 to 7 times the rated current, no-load start to choose lower limit, with maximum load startup options. The star - Angle start, start current 1.7 times lower magnetic generator than direct start, but the duration should be longer, switch to the Angle, the current changed little.