Description
Vikrant machines cover a wide range of winding machines suitable for winding of Transformers from 25KVA
Distribution Transformers to 1200 MVA Large Power Transformers in 11 KV – 765KV class. Vikrant’s winding
machines can be broadly classified into following categories;
Wire Winding Machine – CWR Series
This machine is widely used for winding of HV coils of Distribution Transformers from 25KVA – 1000
KVA with enamel or paper covered round Aluminium or Copper wire. This is a very popular and
economical choice for high speed winding of Cross over coils with wire feeding arrangement from the
operator side and manual guiding of wire by hand. No Tailstock and pitch winding arrangement is
required for such coils. An Electromagnetic brake is provided on the winding spindle.
The same machine can be used for single longer coils when equipped with Tailstock support and pitch
winding arrangement. In such cases the wire is fed from the front side of the operator.
The machine is supplied with one no wire bobbin stand with dancing wire pulley arrangement for wire
tension. All machines are fitted with AC VVF drive for infinite speed control and has provision for
bidirectional rotation. Standard machine is fitted with a Digital programmable revolution counter and
Rotary incremental Encoder. The Machine is operated by an electrical foot switch.
Programable Winding Machine – HLV Series
This is an high speed programmable HV & LV Coil winding machine for automatic winding of HV & LV
coils of Distribution Transformers from 200 KVA – 3000 KVA with single or two no enamel or paper
covered wire or strip conductors. Considerable reduction of winding time is achieved by using this
machine. The machine allows continuous winding with provision for automatic/manual feeding of full
width interlayer paper insulation. The Machine has recipe management which is useful for repetitive
winding of coils.
The major units of the machine are:
- Decoiler for Wire/Conductor with braking arrangement
- Servo motor driven Wire carriage unit with wire guide pulleys
- Decoiler for full width interlayer Paper insulation and paper cutting unit
- VVF controlled AC motor driven Basic Winder unit with brake on spindle
- Swing away type Tailstock unit for easy removal of coils
- PLC & HMI based centralised electrical control panel with AC motor & Servo motor drives
Optional Accessories:
- Edge Insulation Decoiler
- Expandable Winding mandrel
HV & LV Coil Strip Winding Machine upto 5 MVA Coil – CWMNG Series
This series of machines is the most popular for winding of HV &LV coils of Distribution
Transformers from the smallest size to 5 MVA with multiple paper insulated strip
conductors. Two speeds ranges are available on the machines which makes it convenient to wind
at high speed with relatively low toque requirement for lesser no of conductors and low speed
with high torque for winding of larger cross section of conductors. All models of this machine are
provided with AC VVF drive giving the flexibility of stepless speed control for operator’s
convenience. The machines are equipped with a sliding type Tailstock on bed to accommodate
different lengths of winding mandrels. Optionally swing away type Tailstock can be offered for
easy removal of coils. The operation of the machine is by means of twin electrical footswitches
which provides the option of bidirectional rotation. The standard Machine is fitted with a Digital
programmable revolution counter with Rotary incremental Encoder for displaying the no of Turns.
Accessories offered with the machines are
- Auto Rolling conductor guiding cum tensioning device
- Bobbin stand on wheels to accommodate max no of conductor Bobbins
- Collapsible Winding mandrel
High Torque HV & LV Horizontal Strip Winding Machine – CW & CWNG Series
This is the most popular and versatile model of Horizontal Coil winding machine for winding of
both HV & LV coils of large Power Transformer coils with multiple and heavy cross section/pre
transposed strip conductors. These machines are widely used by all major Transformer
manufacturers in the country for winding of 66 – 800 KV class &upto 500 MVA rating Transformers
The range of machine starts with capacity from 3.5 Ton – 25 Tons weight (Coil + Winding
mandrel). The machine can handle a max coil dia of 3000 mm and length of 3500 mm with max
Torque rating of 4000 Kgm. The machines are fitted with large diameter faceplate and heavy duty
Tailstock with Revolving centre and Roller support. Other arrangements of Mandrel
mounting/fixing as per customer requirement is also available. All machines are provided with AC
VVF drive for stepless control of winding speed and jerk free start/stop. The operation of the
machine is controlled by twin electrical foot switch with option for bidirectional rotation. The
machines are fitted with Digital revolution counter and Rotary Incremental Encoder, capable of
displaying 1/36th of a turn.
Optionally the machine can be equipped with a PLC/HMI and VIKRANT BAYWATCH Software for
programmable winding. The programme will accurately stop the machine at pre designated
position for transposition thereby eliminating the operator errors. The programme also has a
limited recipe management which is useful for repetitive winding of coils.
The Major Accessories for these machines are as follows:
- Auto rolling Conductor guiding cum Tension device with pneumatic/manual operation. Height adjustment feature is optional so is Loadcell for display of tension
- Conductor Bobbin stand for multiple Bobbins. Motorised traverse of Bobbin stand on Rails is optional, so is individual pneumatic braking arrangement for Bobbins.
- Motorised scissor type height adjustable Operator working platform
- Hydraulic Transposition/S Bend Tool & 900 Lead Bender
- Axial and radial coil pressing attachment
Vertical Coil Winding Machine – CWV Series
Vertical Coil Winding machines have a number of advantages over the conventional Horizontal Winding
machines in case of winding of large power Transformer Coils as well as some special design coils like
Loco coils were the radial winding depth is normally higher.
VIKRANT manufactures two versions of Vertical Coil Winding machines as follows:
1. Pit type Winding machine, series CWV/P – The Turntable is installed inside
a pit in the floor. The Turntable along with the coil moves up/down as the winding progresses with the
winder and conductor bobbins and Tensioning arrangement all at floor level. An Iris type platform is
provided at the floor level to accommodate various diameter of coils. The major advantage of this version
of winding machine over the Floor type Vertical winding machine is that it allows removal of coil from the
winding mandrel with low level of overhead crane hook height.
2. Floor type Winding machine, series CWV/E – The Turntable is at the floor level with the winder
along with the Bobbins and Tension arrangement moving up/down on a mechanical /Hydraulic elevating
platform as the winding progresses. The platform goes all around the coil and has an Iris type mechanism
to adjust to different coil diameters. This type of winding machine is preferred where ever higher crane
hook height is available and construction of a pit in the floor is not possible.
