The division of surface area

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 
Drawing at the top of the 1, 2, 3... Number is the serial number of drawing area, such as electrical wiring, three phase induction motor it is to facilitate the retrieval convenient single phase motor reading analysis so as to avoid missing. Drawing area number can also be set in the figure below. Drawing area below the Numbers at the bottom of the text shows that its corresponding components or the function of the circuit, so that readers can clearly know the function generator of the circuit components or parts, to facilitate understanding all the working principle of the circuit. Symbol position index with the figure number, negative and drawing area number combination index method, the composition of index code is as follows: drawing number refers to when a device more than the electrical schematic diagram according to the function of binding, the serial number auto spare parts of each book, usually expressed in Numbers. 


3 Phase induction Electrical Motor MS Series for winding machine

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

rated voltage:+-5% 
When a particular components related to the symbolic elements in different size figure drawing, and when each drawing no. Only one page drawing, index acmotor2.blogspot.com can omit "page number" in the code and separator ", ". When a particular components related to the symbol elements appear diesel generator set in the drawings on the same figure number, and the picture, there are several drawing, can omit "drawing number" and the separator "/". When a particular components related to the symbolic elements in different sex, only a drawing of the index code only said "sex". As shown in figure 2-1 in the drawing area magnetic generator 9 KA normally open contacts below "8" is the most ac synchronous generator simple index code. It is pointed out that the coil of the relay KA position in the same picture in figure 2-1 and relay contactor KM coil KA coil at the bottom of the text is contactor KM and relay KA contact corresponding indexes. Electrical principle diagram, contactor and relay coils and contacts dependencies squirrel cage induction motor using right said. The corresponding coil in the schematic diagram below, contact graphic symbol is given, and the below

Current transformer selection and calibration accuracy

Accuracy refers to within the scope of the provisions of the secondary load, a current of the maximum error when rating. China's current transformer accuracy and error limits as shown in table 1, for different measuring instrument, should choose different accuracy of current transformer. The choosing principle of accuracy: billing measurement with the current transformer is the accuracy of 0.2 ~ 0.5; Used to monitor the size of the load current in outlet and inlet line of each loop current meter should choose 1.0 3.0 level current transformer. In order to guarantee the accuracy of error is less than specified value, generally also check current transformer secondary load (ei), transformer secondary load S2n S2 is not greater than the rated load, the selected accuracy can be guaranteed. The accuracy of calibration formula: S2 S2n or less. Secondary loop load l: www.dongfeng-motor.com depends on the value of the secondary loop impedance Z2 is: S2 electric motor 12v 500w = I2n2 ︱ Z2 ︱ material I2n2 (∑ ︱ Zi ︱ + + RXC RWl) or S2V1 material ∑ Si + I2n2 (RWl + RXC), Si, Zi as the secondary circuits of the instrument, the rated load and impedance of the relay coil RXC for all joints in the secondary loop, contact contact resistance, generally take 0.1 Ω, RWl for the secondary loop wire resistance, calculation formula is: the RWl = LC/(r (S). Type, r for the conductivity of the wire, copper wire 53 m/r = (Ω was), aluminium wire r = 32 m (Ω was), S for cross-sectional area (was), LC for the calculation of the wire length (m). A multitude of transformer to instrument one-way length of L1, is: L1 transformer is star. LC = L1 two-phase V wiring. 2 a phase l1 type connection. The accuracy of current transformer used for the relay protection has 5 p and l0P. Protection level of accuracy is based on accurate rating limit down an electric epsilon % of the maximum error of the composite to nominal (such as 5 p corresponding epsilon % = 5%). So-called rated accurate limit a rated current is a current Induction motor is a current multiples (n = I1 small three phase motor / I1n), also known as rated limit coefficient accurately. Is asked to protect by current transformer in the range of possible, its biggest composite error is less than epsilon % value.

Switching network

AC fan cooling motor fan cover 

Specifications
1. Customised 
2. good quality 
3. Surface treatment: Galvanize 

4. Type: Motor Cover 
 Repeaters to go in and out In and out of Repeaters is the interface circuit between the trunk and switching network, is used to switch trunk connections. Its features and circuit and switching system used in the system and trunk signal way has a close relationship between innings. To simulate relay interface unit (ATU), its role is to realize the simulation of the trunk and exchange network interface, basic functions in general are: sending and receiving said trunk status (such as idle, occupy, reply, release, etc.) of the line signal. Forward to receive on behalf of the called number of register signal. Supply the power supply and signal. Provide the received signal to control equipment. For the simplest case, a switch relay through solid line trunk with another switch connection, and USES the subscriber loop signal, then the simulation of the repeater function and equivalent to a "phone". If other more complex signal method, the repeater should implement the corresponding voice, signal transmission and control function.

 CCC,CE Certification and Waterproof Protect Feature ac motor
Specifications
power range: 0.12-18.5 kW 
Centre height of frame: 63-160 mm 
Rated Voltage: 220V 
Rated Frequency: 50Hz or 60Hz
Digital trunk interface unit (DTU) role is to realize the digital trunk and the interface between the digital switching network, it was related by PCM timeslot transmission trunk signaling, complete is similar to the basic function of the simulation should bear repeater. But as a result of the digital trunk transmission way of PCM digital signal, therefore it has some special issues of digital communication, such as frame synchronization, the clock recovery, type exchange, signaling insertion and extraction and so on, which to solve the signal transmission, synchronization and signaling with three aspects of the connection 3 phase induction motor problem. The basic function of digital acmotor2.blogspot.com ac motor relay interface unit including the frame and the complex frame synchronization code generation, frame, even zero suppression, type transformation, alarm processing, clock recovery, frame synchronization search and inter-office signaling insertion and extraction etc., like permanent magnet motor BORSCHT simulated user circuit, also the above eight kinds of function of digital relay unit can be summarized as GAZPACHO.

Capacitance recognition

 The capacity of the capacitor unit is: method (F),micro method (uf),leather (pf).Usually we don't use the unit,because it is too big.The conversion relationship between thepower electric motors various units as follows: 1 f = 1000000 uf uf = 1000000 pf in use,also often see units: nf.Uf = 1000 nf 1 nf = 1000 pf Several methods of capacitor has a capacity of identity: a,direct identification: above electrolytic capacitor,47 uf capacity,capacitance pressure 25 v.Second,the unit using the nf: polyester capacitor as shown above,nominal 4 n7,namely 4.7 nf,converted into pf is 4700 pf.There are,formagnetic generator example: 10 n,0.01 uf namely; 33 n,namely 0.033 uf.Behind the 63 refers to the capacitor voltage 63 v.Three,mathematical notation: above ceramic dielectric capacitors,values,104 capacity: 10 x10000pf = 0.1 uf.If the values 473,is the 47 x1000pf = 0.047 uf.(at the back of the 4,3,say how many power of 10).Such as: 332 = 33 x100pf = 3300 pf. The use of capacitance,should be in thewww.facebook.com/guohong.trading specified work under pressure.Now many of the quality of products,because use the pressure caused by insufficient capacitance fault common capacitance (burst).

Three-phase asynchronous motor winding fault analysis and processing

Winding short circuit Due to magnetic motor the large motor current is too large and the change of supply voltage and single phase operation,mechanical,manufacturing bruised bad insulation damage caused by such as winding interturn short circuit,short circuit between windings,winding interelectrode interphase short circuit and winding short circuit.1.The fault phenomenon Ion of the magnetic field distribution,unbalanced three phase current and make the motor vibration and noise when running,serious when motor can't start,and have great short-circuit current in coil of short circuit,lead to rapid heating coil and burned.

2.The reason Insulation insulation aging motor overload for a long time,lost;Wire insulation damage;Winding be affected with damp be affected with damp decreased insulation resistance caused by insulation breakdown;End and not cushion layer insulation material or plastic damage;End connection wire insulation damage;Or been struck by lightning overvoltage magnet prices insulation breakdown;Friction between rotor and stator winding end insulation damage;Too many metal foreign bodies fall into the inside of the motor and oil pollution.Methods to examine.

3.(1) the external observation method.Observation of junction box,winding end with or without burning,winding overheating after leave a dark brown,and has a bad smell.(2) temperature control method.No-load running for 20 minutes (found abnormal should immediately stop),with the back of hand touch winding parts is more than normal temperature.(3) the electricity experiment method.With current meter measurement,if one phase current is too large,have

indicated that the phase short circuit.(4) the bridge inspection.Measuring a winding dc

resistance,general difference should not exceed 5%,such as more than small,resistance of a phase

short circuit fault.(5) short circuit detection method.There is a short circuit the winding under test,the permanent magnet motors for sale sheet steel can produce vibration.(6) multimeter or megohmmeter.And any two phase winding insulation resistance measurement,if read very small or zero,shows that the two phase winding and has a short circuit.(7) voltage drop.After the three winding in series into the low voltage security alternating current (ac),the study measured a group of small fault.(8) current method.Motor no-load running,to measure the three phase current,in two phase switch,measure and contrast,if he does not change with the power switch,a phase winding large current has the short circuit.

4.Short circuit processing method (1) the short circuit point in the end.Insulating materials available to separate short-circuit point,also can be double insulated wire,to paint drying.(2) short circuit online slot.After the softening,find out the short circuit point repair,back into the trough,then paint drying.(3) the short route turns less than 1/12 of each phase winding,the serial number of turns all cut short route,connect the conduction part,forming a closed loop,supply urgent use.(4) winding short-circuit point when the number of turns more than 1/12,to dismantle all rewind.