Internal structure and function of explosion proof electric hoist

1.Tap: For the need of power grid operation of the explosion proof electric hoist, the general transformer high voltage side has the tap, can not fully guarantee the synchronous switching of tap changer, so the load voltage transformer can not be parallel operation.
2.Voltage transformer: the primary winding turns more than N1, the secondary winding turns less than N2, equivalent to a step-down transformer. When PT is working, the primary winding and the secondary winding are respectively connected with the voltage loop of the primary circuit and the two control loop in parallel. So if the secondary winding short circuit, it will lead to a very large two side current.
3.Hand cart / drawer: hand cart and drawer are part of the high voltage switch cabinet and low voltage switch cabinet. They are basically the same with the fixed switch cabinet, the main difference is the convenience of maintenance and repair.

WOKAITE explosion proof electric hoist

Explosive-proof grade：Ex de IIB T4 Gb （IP54）
Explosion-proof electric cabinet：Ex d IIB T4 Gb
Explosion-proof control button：Ex de IIB T4 Gb
Ex de IIB T4 Gb:
Ex : Explosion-proof mark
de: The main cavity is flameproof，second is increase safety，overall is complex explosion-proof structure.
II: For factory use
B: Flammable andexplosive gases is B gases
T4: Temperature grade
Temperature grade:T4 135℃
Classifiedexplosive gas:T4
Surface temperture100℃ ≤100℃

此博客中的热门博文

How to deal with 3 ton electric chain hoist motor overheating

Any machine has the cycle and time of operation, is not suitable for a long time continuous operation. Long time operation will cause mechanical damage and even accidents, but in general if the 3 ton electric chain hoist surface temperature is too high, we need to check what is the reason. Firstly to check whether it is because the electric hoist weight is too large, beyond the 3 ton electric chain hoist rated weight. Overweight operation will make the motor over heating, overload for a long time will cause irreparable damage to the electric chain hoists for sale. Electric hoist motor is not overloaded, but still heating, should check whether the motor bearing damaged; Should also check whether the motor Work according to regulations, which is one of the reasons causing the motor heating. When the electric hoist motor is running, brake clearance is too small, not completely disengaged, causing great friction, while the frictional heating is also equivalent to the additi...

阅读全文

The reason of electrical wire rope hoist does not work after starting

Mainly because of the hoist does not reach to the rated operating voltage, there are generally 3 kinds of situations: 1.Find out whether the power supply system supply power to wire rope electric hoist , generally used test pencil, such as no power supply; 2.The main control circuit of the wire rope electric hoist is damaged, the line is broken or the contact is bad, can also let the hoist motor not be electrified. This situation, need to overhaul the main control circuit. When maintenance, in order to prevent missing phase to burn the motor casused by the main control circuit supply power to three-phase motor, or hoist motor suddenly operate and cause danger, must disconnect electrical wire rope hoist motor from the power supply, only supply power to the main control circuit. Then start and stop switch, check and analyze the working condition of the electric appliance and the line, repair or replace the failed electric appliance or line. When the main control circuit is confirmed...

阅读全文

Cause analysis of the damage of electric hoist rope

Electric drum occurs electric chain block hoist rope breaking phenomenon after the replacement of the drum for a short time, although the rope guide device is vulnerable parts, but in addition, there is an unexplained collapse. Rope guide specifications: unless calibration, can generally be divided into for cast steel and for cast iron, the steel drum rope guide for the lifting height above 12 meters with smaller diameter, cast iron drum rope guide for lifting height below 12 meters with large diameter. After the replacement of the drum of the electric wire rope hoist is not the original component, it may lead to the uneven force of the guide rope, and may be because of the installation procedure or the components do not match. WOKAITE recommends you, if parts damaged, must try to contact the buyer at the time of the original components. The maintenance of explosion proof hoist should be carried out in accordance with GB3836.13, the danger zone r...

阅读全文

WOKAITE

搜索此博客