YAKK, YAKS Series High-voltage increased-safety Three-phase induction electric motors (H710~800)

1.General Description
Series YAKK and YAKS HV increased-safety induction motors (Frame Size: 710~800) are the latest series products and they are developed and manufactured by our company which based on introducing and adsorbing foreign manufacturing technology of high-voltage, in addition, they are developed by combining with our company's rich experience in design and manufacture of the long-term stable series products especially the high-voltage three-phase induction electric motors.

This series of motors adopt new technique, new material, new technology, well-selected materials and excellent quality, they have many merits such as lightweight, compact construction, big power, high efficiency, low noise, small vibration, safe and reliable operation and convenient maintenance.

This series of motors conform to GB755 <<electric rotating machinery-Rating and Performance>>, Industrial Standard JB/T13957 <<technical conditions for basic series of large-sized three-phase induction motors>> and International Standard IEC. Moreover, this series of motors conform to GB3836.1<<Electrical equipments for use in the environment of explosive gas- part 1: general requirements>> and GB3836.3<<Electrical equipments for use in the environment of explosive gas- part 3: increased-safety "e">>. Each component of the mechanical dimension and tolerance meet corresponding National Standard and International Standard 

2. Technical Parameters

Protection degree: IP44, IP54 or IP55
Cooling system: IC611 or IC81W.
Mounting arrangement: IMB3
(Note: different protection types, cooling system and mounting arrangements are also available according to different customers' requirements)
Rated voltage: 6KV, 10KV
Power range: 315~5600KW
Rated frequency: 50Hz
Ambient air temperature: -5℃~ +40℃
Altitude: not exceeding 1000 meters above sea level
Duty type: Continuous (S1)
Synchronous speed: 3000, 1500, 1000, 750, 600, 500, 429, 375, 333, 300 r/min
Shaft center height: 710, 800mm
Ex mark: ExeIIT1, ExeIIT2, ExeIIT3

Based on this series of motors, indoor, outdoor type (W), humid tropics type (TH), outdoor humid tropics type (THW), indoor medium-anticorrosion type (F1), indoor strong-anticorrosion type (F2), outdoor medium-anticorrosion type (WF1) and outdoor strong-anticorrosion type (WF2) three-phase induction motors have been modified. The performance index, mounting and overall dimensions are the same with basic series of motors.

At the operation site, the average highest relative humidity at the most humid month is 90%, and the average lowest relative temperature at the same month no more than 25℃.
This series of motors can be used to drive all kinds of general machinery, such as compressors, water pumps, blowers and many other mechanical equipments, moreover, they could also be used as driver in some hazardous areas which have explosive gas atmosphere such as the mine, mechanical industry, petrochemical industry, power plant and so on.
 
3. Construction Features

This series of motors adopt box structure which popular in the world, the frame, end shield and some other parts of the motors are welded with steel plate. End-shield sphere sleeve bearings are employed as well, so that high load capacity, convenient overhaul and assembling could be achieved. Furthermore, this series of motors have many other merits such as lightweight and good rigidity, in addition, observation, installation, and maintenance can be done easily after taking down coolers.

Stators of this motor series adopt Class F insulation, and stator windings are wound with two-glasses-fibers covered film-tape flat copper wire. The whole windings are vacuum-pressure impregnated (VPI) to make them have higher electric strength, mechanical strength, insulating property, moisture resistance and thermo-stability.
The rotor of this series of motors adopt copper bar structure, reliable welding technology is supplied between bars and end rings, reliable measures have also been taken to prevent bar from rupture. After high precision balancing verification, the motors can run smoothly with small vibration.

High-voltage terminal boxes are seal structure with a large terminal compartment within which positions of cable head are left. The terminal boxes locate at the right side of the motors (viewing from drive end). When the power of motor is 2000KW or above, a secondary terminal box is equipped at one side of the primary terminal box, being used of neutral point connection of stator three-phase windings and differential protection of motors.

According to customer requirements, motors can be equipped with a bearing temperature detector. The stator temperature detector and anti-condensation heating device can be equipped according to different customer requirements as well.