CM On-Load Tap Changers with Multiple Coarse & Fine Regulation
GeneralCM on load tap changer (OLTC) applies to power and rectifier transformers with rated voltage 35kV, 63kV,110kV,150kV and 220kV, maximum rated through current 600A for three poles and 1500A for single pole, to change the taps under load for the purpose of voltage regulation. Three phase OLTCs are used at the neutral point of the Y connection, the single phase OLTC may be used for any connections. CM OLTC is a typical OLTC of combined structure, which consists of diverter switch
and tap selector.
CM on load tap changer is to be fastened to the transformer tank cover by its tap changer head which serves also for connecting to the motor driver CMA7 or SHM-III via the worm wheel reducer and bevel gear box for the purpose of tap changing.
When CM OLTC is used without a change-over selector,the maximum operating positions available will be 18, and will be up to 35 when it is used with a change-over selector. (special design is exclusive).
This operating instruction includes all the necessary information for the installation and operation of CM
OLTC.
Type designation
Technical data of CM OLTC
Mechanical operation principle of the tap changerThe operation of tap change begins with the electric motor of the motor drive unit. The driving force is
transferred to the worm wheel reducer on the top cover of the tap change through driving shaft and belt pulley box. After the reducer, it is actuated to the energy acumulation mechanism and the shaft which passes through the diverter switch sown to the cylinder bottom.
There the cylinder bottom gear clutch is connected to the Geneva wheel mechanism of the tap selector. The rotation of Geneva wheel makes the contacting bridge to rotate an angle corresponding to one step, thus the connecting bridge will connected to the desired tap of the tap winding without load.
In the same time, the eccentric wheel of the energy accumulation mechanism makes the upper slide to move along the guide rail. The spring between the upper and lower slide is compressed to store energy, the cam wheel is locked by the clutch to hold the lower slide in its original position. When the upper slide moves to the release position, the side wall of the upper slide makes the corresponding jaw to move away from the locked cam wheel, thus releases the energy storage mechanism and operates the diverter switch. At this time, the lower slide moves to the new position, the clutch jaw again engages with the cam wheel, the mechanism is locked to prepare for the next tap change operation.
The motor drive mechanism automatically stops after performing one tap change.
Company Profile:
Main product line: Tap changer and HV switchgear
Tap changer manufacturing with fullest vertical integration
Tap Changer Products Range On-Load Tap Changer
:* Conventional OLTC for transformer with voltage up to 765kV
*Vacuum OLTC for oil transformer with voltage up to 765kV
*Vacuum OLTC for dry transformer with voltage of 72.5kV
Off-Circuit Tap Changer
* Application for the transformer with voltage up to 765kV
Ningbo Ville Electric Co., Ltd. One of wholly owned subsidiaries of VILLE INDUSTRY, It was invested by VILLE INDUSTRY, It is a well-know listed company in China specialized in R&D of electric power technology, equipment manufacturing and engineering services specialized in research, development, production of transformer and high voltage & low voltage electrical power equipment
Our Transmission and distribution companies can provide with whole solution for transformer substation and switch substation trunkey project!
The rated voltage from 11kV up to 132kV.
It locates in Hi-technical enterprise R & D center zone of Ningbo, Zhejiang province, which is one of the well-know coastal city in China. Its professional engaged in power substation, power plant project and electrical power complete equipments.
Working field: Manufacturing, engineering, designing, executing and commissioning for HV and LV electrical products. Turnkey substation from 11KV to 132KV.
Our transformer factory main working is visiting end user's site do measure and reseach before designe, and providing economic transformer solution for customer. Engineering, manufacturing, executing, commissioning and repairing for different kind of transformer (04kv -500kv ).
The products are mainly used in Steel plant; Power - Fossil fuel plant, Nuclear power plant, Railway, Subway and Airport. Wind power generation; Hydroelectric plant engineering; International power generation plant; Power substation transmission and distribution; Residential housing estate power distribution system and so on.
Transformer factory Product includes:
Three phase double (three)- winding power transformer, generator power transformer, auto power transformer, rectifier transformer for each industry, furnace transformer, movable transformer, traction transformer and reactor, power plant auxiliary and standby transformers, transformers for substations of backbone and distribution networks. Transformer for metallurgical companies etc.
In order to achieve the enterprise's strategic target---being stronger, larger, and superior, we continue to expand throughout the world's markets for power transmission and distribution area. And we also actively attach our team to competition, walking forward to the mission of "First-class worldwide transformer supplier"
Supply the guide drawings and installation manuals information directions on the method of handling, storage, mounting and erection of transformers.
Power equipment application:
Power-fossil fuel plant, Steel plant, Infrastructure- railway, international generation, substation, hydropower station, wind power substation, transmission and distribution.
We has excellent experience and good capacity in complete projects equipments in Generation, Substation, Transmission and Distribution from 400V-330kv, especially in Power plant, Substation construction and Transmission line, including of design, complete equipment, installation, Commissioningand after-sales service, and also design the complete Electrical Solutions according to customer's demand. We are mainly services to International State Power Board, Power Construction Contractor, Power Project Contractor, Factories and the Electric Power Project in the world.
In order to achieve the enterprise's strategic target---being stronger, larger, and superior, we continue to expand throughout the world's markets for power transmission and distribution area. And we also actively attach our team to competition, walking forward to the mission of "First-class worldwide electrical equipment supplier"
