Rating: upto 36 kV, 630 A, 16 kA 

General Information
Outdoor type Auto Recloser/ Sectionalizer with magnetic actuator operated mechanism with built in CT, PT or current/voltage sensors is suitable for structure as well as pole mounted execution for rural electrification application.

Applicable Standards
Complies with IEC 62271-111/ ANSI C37.60.

 Salient Features

• Guaranteed for 1,00,000 mechanical operations
• Self powered hence no external auxiliary supply is required
• Manual tripping available by hook stick
• Solid insulation, UV resistant
• RTU can be supplied for control & monitoring the status of recloser, the relay timer setting & metering parameters and can be made to communicate at control room through GSM/CDMA network. Thus suitable for remote operations. SCADA compatable

Application

• Suitable for four shot auto reclosing duty
• Ideally suitable for transient fault application
• Suitable for pole by pole tripping & closing

Advantage

• Light weight
• Self powered
• SCADA compatible

The distinction between digital and numerical relay rests on points of fine technical detail, and is rarely found in areas other than Protection. They can be viewed as natural developments of digital relays as a result of advances in technology. Typically, they use a specialized digital signal processor (DSP) as the computational hardware, together with the associated software tools.

The input analogue signals are converted into a digital representation and processed according to the appropriate mathematical algorithm. Processing is carried out using a specialized microprocessor that is optimized for signal processing applications, known as a digital signal processor or DSP for short. Digital processing of signals in real time requires a very high power microprocessor.

In our numeric relays are true RMS measurements and protection algorithm. Our relays meets new functional requirements of IEC standards like such as IEC -60255-151 and IEC-60255-127.

Megawin has developed a wide range of Numeric relays. 

 Model

Description

 M140A

 Numerical Over current Protection

 3O/C & 1 EF

 M140B

 Numerical Over current Protection with additional features

 3O/C & 1 EF

 M140C

 Numerical Over current Protection with additional features & Communication

 3O/C & 1 EF

 M140D

 Numerical Over current Protection with Communication

 3O/C & 1 EF

 M135C

 Under Voltage / Over Voltage relay with Neutral Displacement

 3Ph O/V / U/V + NDR

 M141A

 Numerical Over current Protection

 2O/C, 1 EF & 1 REF/SEF

Electromechanical relays can be classified into several types as follows,

• Attracted armature
• Induction disc
• Mechanical
• Moving coil
• Motor operated
• Thermal

Our manufacturing range of electromechanical relays types are attracted armature relays and Induction disc relays. These electromagnetic relays use the induction principle discovered by Galileo Ferraris in the late 19th century. The magnetic system in induction disc over current relays is designed to detect over currents in a power system and operate with a pre-determined time delay when certain over current limits have been reached.  

In order to operate, the magnertic system in the relays produces torque that acts on a metal disc to make contact, according to the following basic current/torque equation where

• - is a constant
• , - are the two fluxes
• - is the phase angle between the fluxes 

These electromechanical relays can be used without auxiliary supply, dust free environment conditions, long life cycles compare to static and numeric relays.
Megawin has developed a wide range of Electro Mechanical Relays.

 Model

Description

 MCDG

 Single Pole / Three Pole, Over current / Earth Fault Relays

 MVAG 11

 Instantaneous Voltage Relays

 MCAG 14

 Circulating Current Relays

 MVAA

 Auxiliary Relays

 MVAJH/ MVAJS

 High speed tripping relays

 MVAX

 Trip circuit supervision relays

Rating: upto 36kV, upto 800A, upto 25kA

Applicable Standard: 
Complies with IEC 62271-100

Product Features

• Fixed type switchgear          
• Can be used as part of a switchboard/ RMU system
• Remote operation and communication possible with SCADA system
• Spring and Magnetic Actuator versions available
• Eco friendly as with arc interruption takes place in vacuum and not SF6
• In line with Kyoto protocol
• 12/25 kV earth switch installed in cable compartment is interlocked with double break isolator
• Earth switch is suitable for fault making capacity 

Applicable standards
Complies with IEC 62271 - 100 

Application

• Capacitor switching 
• Intermediate road side pole mounted sub-station 
• Auto recloser
• Sectionalizers

Product Features

• Very compact, light switchgear with very small footprint (less than 1sqm)
• Complete replacement solution to PCVCB's
• Added advantage of having inbuilt current and voltage sensing devices
• Simple multi-pin plug-socket umbilical cable connection between switchgear and control module
• Self powered - derives its control supply from HT power lines
• 1,00,000 mechanical operations guaranteed
• Fewer components resulting enhanced life of this switchgear

Ratings: 12kV, 24kV, 36kV - 630A, 25kA / 3sec.

General Information: Type CSH
Megawin offers medium voltage air insulated load break switch fitted in sheet steel encloser suitable for either Indoor or Outdoor installation. This switchgear is provided with spring assisted opening and closing operation. Auto-Trip possible through HT Fuse and/or shunt trip coil on load condition.
   
Applicable standards 
Complies with IEC 62271-200 / IS 9920.

Application 

• Transformer switching
• Can be used as Ring Main Unit (RMU)
• Incoming power supply on-load isolation
• Used in Tariff metering units

  
Advantages

• Ideal to protect small distribution transformers effectively
• Metal enclosed and safe as no direct access to live parts
• Can be used in ring main systems in multi-panel configuration
• The main switch & earth switch are mechanically interlocked
• Access to the HT HRC Fuse chamber is possible only after switching off main switch and applying earthing switch
• Standard cable termination in air with XLPE Heat-shrink end termination kits only
• Easily repairable on site

Product Features

• Unique self developed natural air blast arc quenching technology
• Easy to maintain, light weight, screw driver engineering
• See to analyze trouble shooting
• Fully inter-locked mechanism and covers
• Integral Earth Switch duly inter-locked with main switch
• Auto trip mechanism for local and remote electrical tripping of main switch on load current carrying condition

Rating

Unit

 Rating Voltage

kV

12

24

36

 Power Frequency withstand voltage

kVrms

28

50

70

 Impulse withstand voltage

kVps

75

125

170

 Rated current

A

630

630

630

 Short time current

kA

25

25

25

 Making current

kAp

62.5

62.5

62.5

Breaking capacity

 Ring Circuit Current

 A

630

630

630

 No Load Transformer

 A

16

16

16

 No Load Line / Cable Current

 A

10

10

10

 Capacitor Swtiching Current

 A

 25

 25

25 

Dimensions per panel

 Panel Width

mm

600

1000

1500

 Panel Depth

mm

1100

1500

1600

 Panel Height (Indoor)

mm

1600

2200

2500

 Panel Height (Outdoor)

 mm

 1825

 2425

 2725

Rating: 12kV, 24kV, 630A, 21kA 

General Information: Type G6 Series

• SF6 insulated Ring Main Unit (RMU) for secondary distribution
• Available in Indoor and Outdoor installation
• Extensible on both sides
• Motorised mechanisms, suitable for SCADA
• Operates through stainless steel bellows, hence leak-free

Applicable Standards
Complies with IEC 62271-1 / 200, IEC 60265, IS 9921

 Advantages

• Compact and user friendly being SF6 insulated
• Maintenance free
• 3mm thick stainless steel gas tank makes it corrosion resistant
• Motorized mechanism makes it suitable for remote operation
• Metallic bellows used for positive no leak operation
• It is extensible on both sides

Safety Features

• Live line indicator
• Earth switch interlocked cable chamber access
• Earthing function after OFF function
• Self powered protection relays

Application

• Ring Main System protection
• As an RMU for secondary distribution
• Transformer Feeder protection
• Ideal for package substations

Product Features

• Corrosion resistant, 3mm stainless steel arcing chamber
• Mechanism outside gas chamber
• Easily extensible on both sides
• Breaking capacity assigned for outgoing load feeder
• Needs no special cable termination

Parameters

Unit

G612

G624

Rated Voltage

kV

12/15

24

Rated Frequency

Hz

50

50

Rated impulse with stand voltage

kVp

75/95

125

Rated one minute power frequency with stand voltage

kVrms

28/38

50

Charging current

Amps

630

400

Earth leakage fault

Amps

95

95

No load cable

Amps

30

30

Off load transformer breaking current

Amps

16

36

Short circuit breaking current capacitive of tea off feeder

kA

21

21

Making current capacity

kAp

52.5

52.5

Short time rating

kA/sec

21kA/3sec

21kA/3sec

Rating: 7.2kV, 12kV, 24kV, 36kV, upto 3MVA

General Information
Cast Resin Transformers are dry type transformers, supplied in sheet steel enclosure suitable for either indoor or outdoor installation and are Air Natural (AN) cooled. Higher ratings for hot environment are supplied with Forced cooling as well. They are suitable for cable termination on HT side and LT side. Bus-Duct termination also offered on LT side.

Applicable Standards
Complies with IS 2026 / IS 11171

Advantages

• Non-hygroscopic epoxy casting  under HPG technology
• Highly stable under short circuit conditions us Copper foil winding on LV side (above 500kVA)
• Low noise as step lap joints used in core construction

Application

• High-rise buildings, congested sub-station locations
• Under ground excavations, tunnels, metro railway networks
• Package Sub-stations
• Fire hazard areas like mining, oil and gas fields, etc.

Product Features

• It is compact and maintenance free
• Resin casting provides much better dielectric strength and short circuit withstand capability
• It has negligible partial discharge due to epoxy casting under specialized vacuum process with HV/LV winding separately cast
• The foil winding in LV makes it withstand higher short circuit forces owing to negligible axial force components
• Off circuit Tap changing links are a standard feature. Dry Type On-load Tap changing Gear can also be supplied

Rating: 7.2kV, 12kV, 24kV, 36kV, upto 3MVA

General Information
Modular designed Untisied Package Sub-station (USS) having HT side Switchgear chamber, Transformer chamber and  LT side  Switchgear chamber with transformer doors interlocked with HT switchgear to trip and alarm, on opening 

• Both indoor and outdoor versions are available
• Factory assembled, compact and ready to install
• Can be safely mounted in basement or on terrace of buildings
• HT side can be offered with LBS or VCB or GIS RMU
• It is a huge saving in civil cost and is aesthetically pleasing

Applicable Standards
Complies to IEC 60076-11 / IS 3427

Advantages

• Modular construction makes shipment and installation possible under congested and  otherwise diffcult locations like basements, mezzanine floors, tunnels etc.
• Flexiblity in choice of HT and LT Switchgear
  
• Option to install Indoor or Outdoor
  
• Outdoor installation needs no roofing, building except plinth
  

Application

• Suitable for high rise buildings in both residential & commercial complexes
• Ideally suitable for transient fault applications
• Extremely well suited for power plants and process industries
• Portable construction power supply units
  

Product Features

• Wide choice of HT Switchgear
• Upto 10 Outgoing Feeders on LT side
• Top cable entry on HT and LT sides
• In outdoor type HT and LT chambers upto IP 55 degree of protection 

FEATURES:

• Circuit Breaker control panel with protection for medium voltage application.
• TRIP / CLOSE breaker control switches with necessary interlock logics with simple MIMIC showing breaker status.
• TRIP LOCK facility with password Protection for Line clear / breaker maintenance.
• LOCAL / REMOTE switch function with Password Lock.
• AUTO Breaker Maintenance annunciation.
• Built in ANNUNCIATOR for TRIP and NONTRIP functions with ACCEPT / RESET push buttons and test LED facility.
• In built Trip Circuit Supervision.
• In built breaker ANTIPUMPING logic.
• Built in CLOSE / TRIP interlock logics.
• DC supply supervision.
• INDICATING LEDs for DC healthy, Trip circuit fail, Breaker ON / OFF status, Remote / Local operations, spring charge, Breaker in service status etc., - 34 LEDs. 
• 14 digital inputs that in inputs for Bucholz alarm, Oil temperature alarm, winding temperature alarm, and Bucholz Trip, Oil temperature Trip, winding temperature Trip functions of Power Transformer.
• MASTER TRIP relay function
• Device Healthy feature to give alarm with different supply in case if this device failure.
• Control button status information in LCD panel.
• Dedicated three phase voltage indicator (MVIL3) with LED indicators directly energized from the PT supply, indicating the status of High voltage without depending on dc supply for safety.(optional)

Rating: 3.3-36 kV upto 900 A 

General Information: 
Megawin Switchgear  offers High Voltage HRC Fuse links suitable for distribution circuits and motor protection circuits.  These are backup fuse links for protection of transformers, cables, capacitors and motors.  The fuse links are available in various current ratings upto 12kV. Fuse links are also available for much higher voltages upto 36kV depending on the application.

Applicable Standards:
Complies with BS-2692, IEC 282 (1) and IS-9385.

Application

• For Transformer protection
• For Motor protection
• For Capacitor protection
• For Voltage transformer protection 

Product Features
Megawin fuse links are available in BS & DIN version for application in Air and Oil switches. Following features ensure quality protection in the distribution circuit.

• Superior performance from the highest braking current down to low over current
• Low Arc voltages permits usage in lower voltage levels
• Striker pin provision for indication as well as trip bar operation in switch fuses
• Low cutoff and let through energy offers protection against the thermal and dynamic effects of high short circuit current
• Special tag versions are available to suit customer needs and special applications.
• Fuse links conform to IEC-282, BS-2692, DIN43625 & IS-9385 specifications

Rating: 3.6 / 7.2kV, 400A

General Information
Megawin make vacuum contactor with solenoid mechanism is suitable for frequent switching application for HT motors.

Applicable standards
Complies with IEC -60470

Product Features 

• Suitable for frequent switching application in HT motor circuits 
• As it is tested for AC4 duty it can be used for inching operation 
• Since it is backed up by HT HRC fuse the cost of power cable is reduced significantly 
• Suitable for 2.5 million operations 
• Mechanically latched version available 
• Mechanically interlocked forward/reverse version available
• Fixed or drawout option available

Application

• Transformer switching up to 1MVA
• Capacitor switching
• Motor switching
• Forward reverse control of motors
• Twin drive application

Advantage

• Low chopping current
• Suitable for use on mobile units
• Accurate coordination with numerical relays
• Remote indications for status

Rating: 27.5kV, 2000A 20kA

General Information: Type MSTB
Megawin offers single pole vacuum circuit breakers and interrupters with magnetic actuator mechanism for AC Traction application. 

• It is fully type tested-E2 class
• BIL suitable for 250kV peak / 95 kV RMS
• 1,00,000 mechanical operations guaranteed

Applicable Standards
Complies with IEC 62271-100,IEC 60694,RDSO specification nos. TI/SPC/PSI/CB/0000 with A&C slip no.1-4, ETI/PII/167(9/97) with A&C slip No.1

Application

• AC Transaction application
• Suitable for pole mounted application in metro railways
• Suitable for line charging, cable charging, capacitor switching and phase opposition application

Product Features

• Arc interruption is in vaccum, hence it is environment friendly and suitable for more than 100 shots at full short circuit
• Usage of magnetic actuator mechanism guarantees 1,00,000 mechanical operations
• Suitable for both structure & pole mounted applications
• Equipment tested for 250 kVp impulse and 95 kVrms power frequency with stand voltage
• Successfully cleared for line charging, cable charging, capacitor switching and out of phase breaking currrent

Rating:
Rated Voltage up to 52 kV Short circuit current up to 50 kA
Rated currents up to 4000 A
30.000 mechanical operations and 20,000 electrical operations cycles for circuit breakers
2.5 million operations cycles for contactors

Applicable Standards
IEC 62271-100 Also meets ANSI standard.

Model

Rated Voltage in kV

Rated Current in A

Short Circuit Current in kA

BIL

Breaking

Making

G1

12

1250

20

50

12/35/75

G2

12

1600

25

62.5

12/35/75

G3

12

2000

31.5

80

12/35/75

G4

12

2000

40

100

12/35/75

G4-B

12

3150

40/44

100

12/35/75

G4-50

12

4000

50

125

12/35/75

G5

36

2000

25

63

36/70/170

G5-B

36/40.5

2500

31.5

80

36/70/170

G7

27.5

2000

20

50

27.5/95/185

G8

7.2

450

3.6

4.5

7.2/20/60

Range: 12kV, 400A, 12.5kA 
 
General Information : Type VMC
Megawin make 12 kV,400 A,12.5 kA capacitor switch is suitable for both indoor & outdoor applications. 
 
Applicable standards
Complies with IS: 9920:85 

Product Features

• Very compact
• Maintenance free
• Mechanical & Electrical life is more than 20,000 operations
• Self powered hence no auxiliary supply is required

Application

• Capacitor switching
• Suitable for synchronous switching
• Ideally suited for power factor improvement

Rating: 17.5/36 kV, 630A, 12.5kA 

General Information:
Sectionaliser is a self circuit opening device that is to be used in conjunction with upstream protective devices such as Auto recloser or Vaccum Circuit Breaker.

Applicable Standards
Complies with IEC-62271-103 / IEC 60265  

 Product Features

• Suitable for mounting on a Single Pole Structure or on Double Pole Structure
• Sectionalisers are housed in a stainless steel tank that is filled with SF6 gas
• The tank is totally sealed for leak-proof for leak-proof performance for a duration of 20 years
• The tank is fabricated to a degree of protection IP 67
• The open and closed status of the sectionaliser is clearly visible from the ground level
• SCADA compatable through MODBUS/DNP3/IEC 60870-5-101/103 protocols.
• Self powered
• Phase Fault Detection
• Earth Fault Detection
• Sensitive Earth Fault Detection

 Parameters

Unit

17.5kV

36kV

 Rated Voltage

kVrms

17.5

36

 Rated Nominal Current

Amps

630

630

 Rated Frequency

Hz

50/60

50/60

 Rated Lighting Impulse withstand voltage

kVpeak

95

170

 Rated one minute power frequency withstand voltage

kVrms

38

70

 Short time withstand current

kArms

12.5

12.5

 Rated short time withstand current duration

sec

3

3

 Rated peak withstand current

kApeak

31.5

31.5

 Attitude

m

1000

1000

 Ambient Temperature

Celsius

-25 to +40

-25 to +40

 Mechanical operation

3000

3000

 Auxiliary voltage for motor mechanism

24 V DC

24 V DC

Rating: upto 36kV, 2500A, 31.5kA

General Information
Megawin make Cassette type Indoor Metal Clad vacuum circuit breaker is suitable for secondary distribution and infrastructure segment

Applicable standards 
Complies with IEC 62271-100 / 200 / 1.

Application 

• Transformer switching 
• Capacitor switching 
• Motor switching 
• Long feeder control

Product Features

• Can be offered in conventional spring operated mechanism or magnetic actuator mechanism
• Very compact. Thereby significantly reduces civil cost
• It provides total safety to the operating personnel as all operations are facilitated in door-closed condition only
• It has sufficient head room in the cable chamber i.e, more than 650mm which provides ease in bending & terminating power cable in cable box chamber
• Compact yet modular
• Fixed isolating contacts embedded in seal off bushing provides total segregation amongst high voltage compartments within the cubicle
• It has 4 distinct high voltage compartments. Thereby offers the benefit of replacing PT primary fuse without switching off the incomer
• Mechanical push to TRIP and CLOSE buttons can be provided for operation in closed door condition
  
  

Rating: upto 36 kV, 4000A, 50 kA*

Applicable Standard:
Complies with IEC 62271-100 / 200 / 1
Type Test: IAC ALFR40 one second

Product Features

•  Air insulated,metal clad roll on floor design 
•  Spring operated and Magnetic actuator versions available
•  Megawin interrupters using magnetic axial principle is deployed in     all breakers
•  It provides total safety to the operating personnel as all operations are  facilitated in door  closed condition
•  Safety interlocks and padlocks also available
•  Modular design with three distinct high voltage compartments
•  Outdoor version with roof bushing or cable box arrangement can also be offered   

 **35kVrms/95kVp as an optional for 12 kV 
** 85kVrms/200kVp as optional for 36 kV