Qin Wei Motor

1. Ensure nameplate data corresponds with your requirements

Ensure the motor is undamaged

3. Remove any shaft clamp (but refit prior to transportation)
4. Slowly rotate the shaft to ensure free movement
5. Ensure the mounting/shaft orientation design and drain hold positions are correct for the application

Eyebolt(s) and any other lifting means must be tight before use.

WARNING The following safety precautions must be observed:

Electric rotating machinery and electricity can cause serious or fatal injury if the motor is improperly installed, operated or maintained. Responsible personnel must be fully trained to understand the hazards to themselves and others before being involved in installing, operation, maintaining and decommissioning electric motors. European Union Safety information can be obtained from such as:

EN60204-1 ; EN60034 ; EN292 ; EN294 ; IEE Wiring Regulations Particular

Industries and countries have further safety requirements. Refer to their trade & safety bodies


EECS Special Conditions for Safe Use

a. All terminal nuts and screws, whether used or not, shall be correctly tightened.

b. Supply connections shall be made with ring type terminal lugs which have insulated shanks. Clearance & distances shall not be reduced when tightening connections.

c. On auxiliary terminals the conductor insulation shall extend to within 1mm of the terminal throat.

d. There shall be no loose conductor strands on any terminal.

e. The drain plugs (when fitted) shall be replaced immediately after use and sealed with appropriate sealing compound.

f. The brass terminal links shall be connected correctly so as not to reduce the clearance distances

3. When servicing, all power sources to the motor and to the accessory devices should be de-energized and disconnected and all rotating parts at standstill.
4. Lifting means, such as eyebolts, on the motor are fro lifting only the motor itself. Assemblies which are not part of the motor must be removed prior to using the motor, all must be used together, for instance by attaching a supporting chain to each, to share the load. Ensure that lifting means are fully attached to the motor before lifting.
5. Suitable ear protection must be worn near machinery emitting high audible noise to reduce the noise reaching the ear to a safe level. Refer to EN 60034-9 : 1994 for further information on noise from rotating electrical machines.
6. Safety guards and other protective devices must neither be bypassed nor rendered inoperative.
7. The motor must be earthed. Refer to relevant standards such as EN60204-1, IEE Wiring Regulations etc.
8. A suitable enclosure must be provided for the motor to prevent access to moving parts. Extra caution should be observed around a motor that is automatically started or has automatic resetting relays or is remotely started in case such starting means has not been properly disabled and the motor starts unexpectedly.
9. Ensure all shaft keys present on moving parts are fully captive before the motor is started.
10. Ensure adequate safeguards have been made to protect against the consequences of a brake failure, particularly on applications involving overhauling loads.
11. When using a motor in a variable speed application ensure that it will not be driven above its safe maximum speed limit. Consult QIN WEI if in doubt. Also ensure the motor is not overloaded: It should be remembered that as speed reduces, fans driven by the main shaft do not provide as much cooling air and an auxiliary fan may be required.
12. Protect the motor from overload, preferable by monitoring the winding temperature. QIN WEI can fit thermistors to give indication that the winding is getting too hot and the thermistors can be connected to switchgear that will automatically trip on the signal from the thermistors.

Capacitors such as in single phase motors may remain charged even when isolated from the mains supply. Discharge capacitors and earth their terminals before handling any connections.

14. If regreasing is to be carried out with the motor running, ensure it is done only by properly-trained personnel and that live and moving parts are fully guarded

Drip proof motors are intended for use where the atmosphere is relatively clean, dry, well ventilated and non-corrosive. Refer to EN 60034: Part 5 for more detailed information on suitability of a particular enclosure rating

2. Totally-enclosed motor may be installed where dirt, moisture or dust are present and in outdoor locations. Refer to EN 60034: Part 5 for more detailed information on suitability of a particular enclosure rating.

Chemical duty enclosed motors are designed for installation in locations where they may encounter corrosive substances and/or high moisture


Ensure the orientation of the frame is appropriate for the design of the motor.

For instance, motors designed for B3 (horizontal shaft), may not be suitable without modification for V5 (vertical shaft) because any drain holes will be in the wrong position, additional fixings may be required to prevent the shaft sliding through the bearings and different bearings may be needed to withstand the thrust force.

Drip proof motors may not be drip proof in the wrong orientation.

Consult QIN WEI to establish whether a motor may be safely used in an orientation different from that ordered

Where the motor is to be subject to a high degree of vibration (such as on a

vibrating screen), high humidity (typically above 95%), abnormal ambient

temperature (typically outside the range -20 to +45 J ), or high altitude

(typically above 1000 meter) ensure that the motor specification is appropriate.
3. When mounting the motor, ensure this is done securely using steel nuts and bolts through each of the fixing holes provided, fully tightened. Where the location is likely to cause rusting, such as in the presence of sea water, stainless steel fixing bolts may be an advantage. Where there is significant vibration, ensure there are shakeproof washers under the nuts
4. Where the drain holes are to be left open, ensure they are guarded from access when the motor windings are connected to a power supply.
5. With a directly-coupled load ensure that motor and load shafts are accurately aligned and use a flexible coupling between them. Mounting bolts must be carefully tightened to avoid alignment changes and the alignment rechecked to ensure it is correct when the bolts are fully tight

With a side-coupled load, such as a belt or gear drive, ensure the side force on the shaft will not damage the motor. Consult QIN WEI if in doubt.



1. Wiring of the motor and its controller, overload protection and earthing should be in accordance with the current edition of the IEE wiring regulations, EN60204 and all local safety requirements.
2. Refer to the nameplate voltage and frequency to ensure the motor is correct for the power supply to which it is to be connected. Unless specified otherwise the motor may be assumed to be suitable for the nameplate voltage +/-5% and nameplate frequency +/-1%.
3. Connection diagrams for the motor are generally supplied with it, either on the nameplate, fixed to the motor or placed in the terminal box.

Initially, run the motor unloaded and establish that the rotation direction is as required. If not, switch off and when rotation has stopped:

 If the motor is a three phase motor V interchange any two phases.

If the motor is a single phase motor V interchange the connections to the auxiliary winding circuit, leaving the connections to the main winding unchanged.
2. Then start the motor fully loaded. If it does not start quickly and run smoothly, switch off immediately and when rotation has stopped, isolate from the power supply and examine the assembly for mechanical faults or poor connections.

If there is excessive vibration it could be caused by poorly-aligned couplings, loose mounting bolts, lack of rigidity in the supports, transmitted vibration from adjacent machinery etc. Excessive vibration can lead to motor damage, for instance to the bearings making them noisy, and hence vibration should be minimized.

4. Ensure the current drawn is commensurate with that shown on the nameplate and that the currents in each phase are similar
5. If a single phase motor does not start, this may due to the internal starting switch not closing when the rotor is stationary or a faulty starting capacitor.

Long Term Storage and Humid Environments

  If the motor has been stored for an extensive period or subjected to adverse moisture conditions, ensure the insulation resistance is greater than 1M Ohm before switching on. Also, regrease the bearings and if they are rusty, replace them.
  When the insulation resistance is not greater 1M Ohm, dry out the motor as described below. If after drying out the insulation resistance is still not greater than 1M Ohm, the motor will need repairing
This may be carried out eitherG
1. By baking in an oven at up to 90 J . Ensure the interior and exterior of the oven are well ventilated.

By locking the rotor so it cannot move and connecting a low voltage to the motor windings. Gradually increase the voltage from zero until the current is about one third the rating plate value. Trim the voltage as necessary so that the winding temperature remains below 90 J .

Dying out is complete when the insulation resistance stops changing.

Inspect the motor at regular intervals. Ensure it is kept clean with clear

ventilation openings, there is no excessive vibration and noise emitted from the motor are normal. Ensure fixings and fasteners have not lossened nor so corroded that either their strength has been reduced significantly or earthing has been impaired. Ensure also that electrical connections are tight and uncorroded and that earthing is intact.

Inspect shaft seals and terminal box gaskets to ensure they are in position and not significantly worn. Contact QIN WEI if the seal/gasket types on the motor are unkown. Examine the paint finish and repaint if necessary to avoid excessive corrosion. Ensure that shaft couplings are fixed firmly and that shaft alignment is correct. Ensure also that there is no build up of liquid inside the motor that would adversely affect its performance and drain if there is
1. Standard conditions: 8 hours operation per day with rated or light loading in a clean low-vibration environment
2. Severe conditions: 24 hour operation per day with rated/light loading or in a dirty dusty environment or where the motor is subject to vibration/light shock loading

Extreme conditions: Where there is heavy shock loading or high vibration or a very dirty/dusty environment

Disposal of unserviceable and end-of life motors and parts.

The motors consist by weight, primarily of cast iron, steel, cooper and aluminum. They also have some plastic material for instance, for insulation, sealing and termination of conductors and varnish for impregnation of the winding. The fan and internal baffles may be of plastic. alloy.

  Typically the metals are recyclable by burning off in a furnace the non-metallic material and either breaking or melting the metals into their constituents. Ensure the gases given off during the burning do not pollute
  The furnace may need a licence or evidence giving them exemption (for instance if they are small) to carry this out.
  The above suggestions of or recycling should be taken as guidance only. Dispose of according to the regulations in force locally
Copyright © 2006 Qin Wei Electric Corp. All Rights Reserved.