• Vacuum on-Load Tap Changers for Oil Immersed Transformers Switch Cm2 Oltc
  • Vacuum on-Load Tap Changers for Oil Immersed Transformers Switch Cm2 Oltc
  • Vacuum on-Load Tap Changers for Oil Immersed Transformers Switch Cm2 Oltc
  • Vacuum on-Load Tap Changers for Oil Immersed Transformers Switch Cm2 Oltc
  • Vacuum on-Load Tap Changers for Oil Immersed Transformers Switch Cm2 Oltc
  • Vacuum on-Load Tap Changers for Oil Immersed Transformers Switch Cm2 Oltc

Vacuum on-Load Tap Changers for Oil Immersed Transformers Switch Cm2 Oltc

Phase: Three
Core: Core-type Transformer
Cooling Method: Oil-immersed Type Transformer
Winding Type: Multi-winding Transformer
Usage: Single-phase Transformer, Rectifier Transformer, Combined Transformer, Power Transformer, Distribution Transformer
Frequency Characteristics: Power Frequency
Customization:

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Mr. Green Hsu
Commerical Manager
Gold Member Since 2007

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Rating: 5.0/5

Basic Info.

Model NO.
CM2
Max Rated Current
600A 1500A
Connection Method
Y, D
Rated Voltage
3.3kv
Transport Package
Wooden Cases
Specification
IEC CE, ISO
Trademark
VILLE
Origin
Ningbo
HS Code
85
Production Capacity
50000 Sets

Product Description

Vacuum On-Load Tap Changers For Oil Immersed Transformers switch
CM2 OLTC


General
CM2 on load tap changer (Hereafter, referred to as OLTC) applies to power and rectification transformers with 
highest voltage of 72.5kV,126kV,170kV and 252kV, maximum rated through current of 600A for three phases
and 1500A for single phases, to change the taps under 
load for the purpose of voltage regulation. Three phase
OLTCs are 
used at the neutral point of Y connection, and single phase OLTC can be used for any
connections. 
CM2 OLTC is a typical OLTC of combined structure, consisting of diverter switch and tap selector.
CM2 on load tap changer is to be mounted 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 gear box and bevel gear box to drive tap
change operation.
When CM2 OLTC is used without a change-over selector, the maximum 
operating positions available will be 18,
and 35 positions with a changeover selector. (special design is excluded).
This operation instructions includes all the necessary information for the installation and operation of CM2
OLTC. CM2 vacuum OLTC has the same overall dimension as CM type OLTC.


Type designation
Vacuum on-Load Tap Changers for Oil Immersed Transformers Switch Cm2 Oltc

The operating condition of OLTC
The temperature of oil under which the tap changer operates must not exceed 100ºC and not lower than

-25ºC .
The ambient temperature around the tap changer must not exceed 40ºC and not lower than -25ºC .
The non-perpendicularity of OLTC on the transformer against ground level should not exceed 2%
The space for mounting OLTC should be free from serious dust and other explosive and corrosive gases.


The mechanical life of OLTC should not be less than 1,500,000 operations.
 

The mechanical life of OLTC should not be less than 1,500,000 operations.

Vacuum on-Load Tap Changers for Oil Immersed Transformers Switch Cm2 Oltc
Vacuum on-Load Tap Changers for Oil Immersed Transformers Switch Cm2 Oltc

Mechanical operation principle of the tap changer

Tap change operation begins with the electric motor of the motor drive unit. The driving force is transferred to
the worm gear box on the top cover of the tap changer through driving shaft and belt pulley box,then the force
is actuated to the energy accumulating 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 be connected to the desired tap of the tap winding without load.

Transportation of transformer together with the tap changer

When the tap changer is assembled to the transformer, careful consideration shall be given to the safety of
transportation (for example, to provide the temporary supporting). If the tap changer is immersed type, it is not
necessary to remove it for transportation. If there is trouble which requires to dismantle the motor drive unit, it
should be loosened at the setting position, so that it can be transported in the horizontal position. After arriving
on site, the motor drive unit can be re-installed according to above mentioned.

If the transformer is transported or stored without the conservator, then the bypass pipe (see Appendix 9)
supplied by our factory can be installed between the oil filling flange of the tap changer and the overflow pipe
flange of the transformer (the position of the flange is shown in the Appendix1), so that the static pressure
caused by the oil expansion can be balanced.

If transformer is required to be transported or stored without oil filling, then the oil in the oil compartment of the
diverter switch must be completely drained. The bypass pipe must be installed at that time so that the oil
compartment and the transformer oil tank will be subjected to the same pressure (nitrogen sealing).

In order to avoid damaging the tap changer caused by the displacement of moving parts, they must be
temporarily secured.

Note: The bypass pipe shall be removed from the tap changer head when the transformer is 
installed onsite and before putting it into operation.

Packing

The tap changer and the motor drive unit are packaged separately for delivery after they have been conducted
routine test and set at the specified position.

Maintenance period
It is free maintenance for 300,000 operations.

Vacuum on-Load Tap Changers for Oil Immersed Transformers Switch Cm2 Oltc

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


Vacuum on-Load Tap Changers for Oil Immersed Transformers Switch Cm2 Oltc


Vacuum on-Load Tap Changers for Oil Immersed Transformers Switch Cm2 Oltc
Our Services
1. Pre sale service
a. make technical solution
b. send quotation, technical data sheet and drawing
c. prepare power transmission plan, testing plan and shipment plan
2. In sale service
a. supervise the manufacturing schedule totally in accordance with the plan
b. send photos to customer during every manufacturing process(hold point)
c. inform the customer one week before testing.
3. After sale service
a. installation and commissioning, training the workers
b. quick response within 12 hours any time
c. provide 12 months guarantee period normally.

FAQ
1. Q: What is your delivery time ?
A: Depend on the type of transformer.
2. Q: What is your payment term?
A: 30% advance by T/T , 70% before delivery by T/T or L/C or we can discuss about it.
3. Q: What kind of standard you follow?
A: IEC, ANSI, CSA, GB, etc
4. Q: What kind of supporting documentation you can provide normally
A: Quotation, outline drawing, manufacturing plan, quality control plan testing plan, financial report, type test report(KEMA, CESI),reference list, etc
5. Q: What is your normal warranty period?
A: 12 months after transformer operation.
6. Q: Can u do installation and commission in user's site?
A: Yes, we can send our installation team to user's country for service.
7. Q: Do you have any experience in this kind of transformer?
A: Yes, we can provide reference list for check.

Our advantages:
Quality Assurance
--From the very beginning, VILLE ensures quality in every step to achieve the best quality.
 Experience Sharing
--With more than 30 years' experience in power industry, VILLE brings you an optimized solution.
 Global Service
--Wherever you are, VILLE global network will support and provide you with value.
 Quick Response
--In response to your needs without delay, VILLE  knows the value of your time.

Thanks for choosing VILLE as your reliable partner and
please trust both of us will create a brilliant future!

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Mr. Green Hsu
Commerical Manager
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Rating: 5.0/5
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