The installation of the switch and outlet boxes and panel, connection is not in conformity with the requirements

 Stator And Rotor ac induction motor parts 

Specifications
1. 20 years manufacturing experience 
2. competitive price,high quality 
3. Material: silicon steel 
1, the phenomenon of electric motors (1), the box embedded too deep, different level; Panels and Water pump wall body between cracks, lac pollution, not flat. (2), box with mortar sundry. (3), phase line of switch and outlet, the zero lamination line, PE line are concatenated phenomenon. (4) the wires, switches, sockets thrum exposed, fixed bolt looseness, box conductor is absence. 2, root cause analysis (1), embedded box without reliable fixation, template expansion mode, installation time coordinates are not accurate. (2), construction personnel is not strong sense of responsibility, the use of electrical safety importance understanding insufficiency, the easier. (3), there is not reasonable to save material. 


Electric Motors 1 HP 3PH
Specifications
1. Shape: squirrel cage
2. CE.ISO CCC 
3. Side Terminal Box 
4. Free Foot Mounting 

5. 100% copper wire 
3, preventive measures (1), in close coordination with small diesel generator set diesel engine the civil engineering professional, accurate reliable fixed box; When embedded box is deep, should be equipped with a box. Installing a panel to horizontal flat vertical, application level calibration level, ensure the installation height of unity. In addition, diesel generator set after install panel to full seams, are not allowed to leave aperture, be clean protection panel. (2), strengthen supervision and management, ensure the phase switch and outlet line, zero line, PE line rotor and stator protection cannot be concatenated, clean up the first container of mortar. (3), fixed size when stripping, guarantee the thread tidy uniform, thread www.facebook.com/guohong.trading after installation not naked; To strong pressure wire at the same time, the single conductor when the insert line hole should be generator set spread into twin, screw tight, tight. (4), switch, socket box wires should have certain allowance, is 100-150 - mm; To resolutely put an end to the unreasonable material greed.

Models such as five p10, what is the meaning of the 5 p20? How to choose?

 ac motor Lamination 220v class B/F 
Specifications
1. Lamination of electric motor 
2. IP54 class F 
3. 100% copper 
4. silicon steel stamping 
5. stunning performance 
5 p10, 10 is behind the accuracy limit factor. 5 p10 said when a current is 10 times of the rated primary current, the winding composite error of plus or minus 5% or less. The significance of accurate electricalmotor1.blogspot.com limit coefficient is within the scope of guarantee error in the plus or minus 5%, multiples of a current must not exceed the rated current, if the primary current is bigger, be about to choose 5 p20, might even choose 5 p30. By the calculation, for example, you need to have protection, short circuit current under the largest operation mode is 4 KA, you choose the current transformer is 150/5, 5 P10, ANP gost motor this means the current transformer in 10 times a * 150 = 150 a = 1.5 KA, can guarantee the winding composite error of plus or minus 5% or less; 

115/120 V AC Voltage and Three-phase Phase small 240v electric motor
Specifications
1.Specifications1.3-phase asynchronous motors 
2.IEC standard 
3.OEM 
4.Voltage:50HZ &60HZ;380V&415V 

5.Protection class: IP54 
And probably after short circuit, current exceeds 1.5 KA, even achieve 4 KA, then carlt composite error of plus or minus 5% or less, if choose 150/5, 5 P30 current transformer, current transformer in 150 a * 30 times = 4500 a = 4.5 KA, can guarantee winding composite error of plus or minus 5% or less, but only 4 KA maximum short- circuit current, in the full range, can ensure the accuracy of protective current transformer. But in practical application, in order to reduce costs, protect the electric generator does not need too high accuracy, 10 p have been able to meet this need, and when choosing current transformer, also it is not necessary to ensure the maximum short-circuit current, also guarantee the accuracy, generally near the protection setting value can guarantee accuracy.

Hydraulic test and pressure test

AC Electric motor Plastic fan parts 
Specifications
1. Customised 
2. good quality 
3. 20 years manufacturing experience 

4. Delivery Detail: 20-35 days after receiving payment 
1. When the test container, the top should be a vent should be in the air in the container when charging. During the trial, the outer surface of the container should be kept dry. 2. When the pressure vessel wall temperature and the temperature single phase motor is roughly same, liquid pressure. 3. The test pressure shall be slowly rising, reach the specified test pressure, pressure maintaining time is generally not less than 30 min, then the pressure drop to 80% in the specified test pressure and and stay long enough to examine all of the welded joint and connection parts. If there is any leakage, repair and test again. 4. Pressure should be ac electric motor kept constant during inspection, shall not adopt continuous pressure to keep the pressure constant. In the process of the hydraulic pressure test shall not take the bolt or external forces are added to the pressure parts. 5. For spherical storage tanks, hydraulic test method meets the requirements of GB 12337-1998 the 8.10.4.4. Pressure test. 1. The pressure test should have security measures, the safety measures should be approved by the head test unit technology.

 Totally Enclosed Protect Feature and Three-phase Phase low rpm ac electric motor
Specifications
Specifications1.3-phase asynchronous motors 
2.IEC standard 
3.OEM 
4.Voltage:50HZ &60HZ;380V&415V 
5.Protection class: IP54 
The safety of the pressure test, the test unit department deal with on-site supervision of the implementation of the security measures. 2. The test pressure shall be www.facebook.com/guohong.trading slowly rising, to 10% in the specified test pressure and no more than 0.05 MPa, the holding 5 min, for all the welding joint and connection parts with soap or other liquid leak detection for the first time the leak check, if there are any leaks, repair and test again. Initial leakage inspection qualified, and then slowly rose to a test pressure of 50%, if there is no abnormal phenomenon, followed by per level for 10% of the specified test pressure booster, step by step until the specified test pressure. The holding after 30 min, the pressure drop to 87% in the specified test pressure and maintain long enough, again to leak check all of the welded joint and connection parts. If there is any leakage, repair according to the above provisions after the test. 3. Pressure should be kept constant during inspection, shall not adopt continuous pressure to maintain test pressure constant. The bolt is strictly prohibited in the process of pressure test with pressure and the external force are added to the pressure parts. 4. For spherical storage tanks, pressure test method should also conform to the requirements of 8.10.5.5 in GB 12337-12337.

The winding of the motor faults

Winding is part and parcel of the motors, aging, be affected with damp be affected with damp, heat, erosion, foreign bodies, intrusion, the impact of the external force can cause damage to winding, motor overload, under voltage, over voltage, lack of phase operation can also cause winding fault. Winding grounding, short circuit, open circuit fault generally fall into winding, connection errors. 1, failure phenomenon Chassis charged, heat control circuit is out of control, winding short circuit, the normal operation of the motor. 2, the reason Make insulation resistance winding be affected with damp be affected with damp down? Motor overload for a long time to run? Corrosion of harmful gas? Metal foreign body into winding internal damage the insulation? Rewind stator winding Motor vehicle insulation damage when touch the core? Winding end touch end cover stand? , rotor friction caused insulation burn? Lead wire insulation damage into the shell? Overvoltage (such as lightning) insulation breakdown. 3, processing method, (1) winding drying should be affected with damp be affected with damp cause ground, when cooled to about 60-70 ℃, pour insulating paint again after drying. (2) the end winding insulation damage, in receiving is located in the back of the insulation and painting, dry again. (3) windings to place in the groove, diesel generating set should rewind or replace part windings components.