Catalogo Celdas Demitas Dme

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    DME 2412 - 24 kV

    630 - 1250 A

    16 kA

    METAL ENCLOSED SWITCHGEAR

    DEMTAPOWER SYSTEMS

    MODULER UNIT

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    CONTENTS

    DEMTAPOWER SYSTEMS

    Descrpton 1

    Unt Dmensons 3

    Unt Types 4

    Techncal Data 5

    Typcal Unts 6

    Components 21

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    DESCRIPTION

    DME series Metal enclosed units which are produced by our company,have been

    designed and tested to be used for all energy distribution systems till 24 Kv

    Moduler Metal Enclosed units appear as the optimal solution with their easiness of

    taking operation by means of their moduler structure and with their module appositi

    on characteristic for companies

    DME series Metal enclosed unit are manufactured according to IEC Standards

    Optimal dimensions

    Long term technical solitions for various applications

    High level personal safety

    GENERAL

    APPLICATIONS

    Manufacturing industry

    Secondary electricy distribution networks

    Shopping malls

    MV / LV distribution transformer substations

    Small size power plants

    Wind power plants

    Airports, hospitals, holiday village

    Enclosure of cubicle is 2 mm galvanized steel sheet. If desired al-zinc isalso possible. No welding during the assembling of the structure.

    SAFETY

    There is a survelliance window on the front cover of the every cubicle to

    check inside the cubicle without open the door / cover

    The door / cover of the accessible compartments is mechanically interlocked

    with the earthing switches

    High voltage indication system in each cubicle

    STANDARDS

    Compliance with standards IEC 62271 - 200

    Classfcaton; (accordng to IEC 62271 - 200 )

    Classication of service contunity: LSC 2A

    Classication of the partitions: ( Partition: Insulation )

    Classication of arc proong: IAC A (FL), IAC A (FLR)

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    DESCRIPTION

    STRUCTURES

    1. Busbar compartment

    2. Cable compartment

    3. Low voltage compartment

    4. Operating mechanism compartment

    1. Busbar compartment

    Busbar compartment is located on the top of the

    cubicle. It contains the main busbar which

    interconnect between cubicles. And also;

    Tool based accessible compartment with regardto accessibility, (it means that is not possible to

    open the covers without using any tools)

    Withstand to internal arc

    Having IP 3X protection degree

    2. Cable compartment

    Cable compartment is located at the bottom of the cubicle. It contains switching

    devices, measuring transformers., HV fuses, earthing devices, support insulators

    according to the functional type of the cubicle. Incoming / outgoing MV cable connection of the cubicle is made in this

    compartment. The door has an inspection window. And also;

    Procudure based accessible compartment with regard to accessibility, (it means

    that it is possible to open the covers without using any tools)

    Withstand to internal arc

    Having IP 3X protection degree

    3. Low voltage compartmentLow voltage compartment is located on the front - top of the cubicle having IP3X

    protection degree.

    According to the functional type of the cubicle, it contains, protection relays, LV

    fuses, measurment instruments, auxilary relays, miniature circuit breakers, terminal

    arrays, AC/DC supply, etc.

    4. Operating mechanism compartment

    Operating mechanism compartment is located on the front of the cubicle. According

    to the functional type of the cubicle it contains; disconnector mechanism, switch-disconnector mechanism and same interlocking metal parts.

    Circuit breakers has own mechanism, separately.

    All metal parts of the operating mechanism are protected agains to corrosion.

    1

    2

    3

    4

    2

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    UNIT DIMENSIONS

    940

    1600

    500 940

    940

    1100

    1600

    750

    1600

    750 940

    1600

    375

    UNIT TYPES

    DME 24 - 01

    DME 24 - 02

    DME 24 - 03

    DME 24 - 11

    UNIT TYPES

    DME 24 - 04

    DME 24 - 05

    UNIT TYPES

    DME 24 - 01 /A

    DME 24 - 07

    DME 24 - 07 / A

    DME 24 - 09

    DME 24 - 09 / A

    DME 24 - 11 / A

    UNIT TYPES

    DME 24 - 05 / A

    DME 24 - 08

    DME 24 - 08 / A

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    Type DME 24 - 01

    Switch Unit

    Type DME 24 - 01/A

    Switch Unit and Metering

    Type DME 24 - 02

    Fuse Switch Combination Unit

    Type DME 24 - 03

    Switch Unit and Metering

    Type DME 24 - 04

    Circuit Breaker Unit

    Type DME 24 - 05

    Sectionalising Metering Unit

    Type DME 24 - 05 / A

    Sectionalising Metering Unitwith Disconnector Type

    Type DME 24 - 07

    Incoming Cable Connection Unit

    Type DME 24 - 08

    Metering Unit

    Type DME 24 - 08 / A

    Universal Metering Unit

    Type DME 24 - 09

    Bus Riser Unit

    Type DME 24 - 09 / A

    Bus Riser UnitType DME 24 - 11

    Direct Busbar Connection Unit

    Type DMH 24 - 11 / A

    Direct Busbar Connection

    Unit and Metering

    UNIT TYPES

    Type DME 24 - 07 / A

    Incoming Cable Connection Unit

    4

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    5

    TECHNICAL DATA

    Rated voltage kV 12 17.5 24Rated lighting impulse withstand voltage kV peak

    - Across phases and phase to neutr 75 95 125

    - Across the isolating distance 85 110 145

    Rated power frequency withstand voltage kV eff

    - Across phases and phase to neutr 28 38 50

    - Across the isolating distance 32 45 60

    Rated frequency Hz 50 / 60 50 / 60 50 / 60

    Rated current

    - Busbar 630 / 1250 630 / 1250 630 / 1250

    - Feeder / branch 630 / 1250 630 / 1250 630 / 1250

    Rated short time withstand current kV eff

    - Main circuit 20 20 20

    - Earthing circuit 20 20 20

    Rated peak withstand current kA peak 50 50 50

    Rated duration of short circuit s 1;3 1;3 1;3

    Arc faulth current, 1 s kA 20 20 20

    Internal arc class A(FLR)/A(FL) A(FLR)/A(FL) A(FLR)/A(FL)

    Partitions class PI PI PI

    Loss of the service continuity LSC2A LSC2A LSC2A

    Degree of protection, enclosure IP3X IP3X IP3X

    Degree of protection, partitions IP3X IP3X IP3X

    Ambient temparature C

    - Maximum value +40 +40 +40

    - Maximum value of 24 h mean +35 +35 +35

    - Minimum value -5 -5 -5

    Altitude above sea level m 1000 1000 1000

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    6

    940

    Standart equipment

    1. 3 Position SF6 load break switch

    (open - closed - earthed)2. Operating mechanism with

    mechanical position indication

    3. Voltage indicator device

    4. Heather

    5. Earthing bar

    6. Busbars

    7. Interlocking unit

    8. Auxiliary contacts for close

    (2NO+2NC) and earth (2NO+2NC) position

    9. Cable entry with cable support

    Optional equipments

    1. Remote control with cable (Opening and closing)

    2. Remote control without cable (Opening and closing)3. Gas density indication

    4. Gas density indication with alarm contact

    5. Motor operation device

    6. Cable fault indication device

    7. Surge arresters

    8. Current transformers

    9. Arc-gas channel

    Technical Data

    Rated voltage [kV] 12 17,5 24

    Rated current [A] 630 630 630

    Rated short-time withstand current [kA] 20 20 20

    Maximum rated duration of short circuit [s] 1 1 1

    Net Weight kg 155 155 155

    Gross Weight kg 185 185 185

    Width with pack mm 420 420 420

    Depth with pack mm 1070 1070 1070

    Height with pack mm 1750 1750 1750

    DME 01

    1600

    375

    DME 24 - 01

    Opt: 500

    Switch Unit

    Type DME 24 - 01DME 24Seres

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    940

    Technical Data

    Rated voltage [kV] 12 17,5 24

    Rated current [A] 630/1250 630/1250 630/1250

    Rated short-time withstand current [kA] 20 20 20

    Maximum rated duration of short circuit [s] 1 1 1

    Net Weight kg 205 205 205

    Gross Weight kg 235 235 235

    Width with pack mm 420 420 420

    Depth with pack mm 1070 1070 1070

    Height with pack mm 1750 1750 1750

    DME 01/A

    1600

    500

    DME 24 - 01/A

    Standart equipment

    1. 3 Position SF6 disconnector

    (open - closed - earthed)2. Operating mechanism with

    mechanical position indication

    3. Current transformers

    4. Voltage indicator device

    5. Heather

    6. Earthing bar

    7. Busbars

    8. Interlocking unit

    9. Auxiliary contacts for close

    (2NO+2NC) and earth (2NO+2NC) position

    10.Cable entry with cable support

    Optional Equipments

    1. Gas density indication

    2. Gas density indication with alarm contact3. Motor operation device

    4. Surge arresters

    5. Cable fault indication device

    6. Arc-gas channel

    Switch Unit and Metering

    Type DME 24 - 01/ADME 24Seres

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    8

    940

    Technical Data

    Rated voltage [kV] 12 17,5 24

    Rated current [A] 200 200 200

    Rated short-time withstand current [kA] 20 20 20

    Maximum rated duration of short circuit [s] 1 1 1

    Net Weight kg 170 170 170

    Gross Weight kg 200 200 200

    Width with pack mm 420 420 420

    Depth with pack mm 1070 1070 1070

    Height with pack mm 1750 1750 1750

    Standart equipment

    1. 3 Position SF6 load break switch(open - closed - earthed)

    2. Operating mechanism with

    mechanical position indication

    3. Earthing switch 2 kA

    4. Fuse

    5. Voltage indicator device

    6. Heather

    7. Earthing bar

    8. Busbars

    9. Interlocking unit

    10. Auxiliary contacts for close

    (2NO+2NC) and earth (2NO+2NC) position11. Cable entry with cable support

    Optional Equipments

    1. Remote control with cable (Opening and closing)2. Remote control without cable (Opening and closing)

    3. Gas density indication

    4. Gas density indication with alarm contact

    5. Motor operation device

    6. Voltage transformers

    7. Cable fault indication device

    8. Arc-gas channel

    1600

    375

    DME 02

    DME 24 - 02

    Opt: 500

    Fuse Switch Combination Unit

    Type DME 24 - 02DME 24Seres

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    Technical Data

    Rated voltage [kV] 12 17,5 24

    Rated current [A] 630/1250 630/1250 630/1250

    Rated short-time withstand current [kA] 20 20 20

    Maximum rated duration of short circuit [s] 1 1 1

    Net Weight kg 300 300 300

    Gross Weight kg 330 330 330

    Width with pack mm 420 420 420

    Depth with pack mm 1070 1070 1070

    Height with pack mm 1750 1750 1750

    940

    Standart equipment

    1. 3 Position SF6 disconnector(open - closed - earthed)

    2. Operating mechanism with

    mechanical position indication

    3. Voltage transformers

    4. Fuse

    5. Voltage indicator device

    6. Heather

    7. Earthing bar

    8. Busbars

    9. Interlocking unit

    10.Auxiliary contacts for close

    (2NO+2NC) and earth (2NO+2NC) position

    Optional Equipments

    1. Earthing switch2. Gas density indication

    3. Gas density indication with alarm contact

    4. Cable fault indication device

    5. Arc-gas channel

    DME 03

    1600

    375

    DME 24 - 03

    Opt: 500

    Switch Unit and Metering

    Type DME 24 - 03DME 24Seres

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    10

    Standart equipment

    1. 3 Position SF6 disconnector

    (open - closed - earthed)

    2. Operating mechanism with mechanical position indication

    3. Circuit breaker, vacuum or SF6 type

    4. Current transformers (toroidal or

    standard type )

    5. Over current protection relay

    6. Earthing switch 16 kA

    7. Voltage indicator device

    8. Heather

    9. Earthing bar

    10.Busbars

    11. Interlocking unit12. Auxiliary contacts for close

    (2NO+2NC) and earth (2NO+2NC) position

    13. Cable entry with cable support

    Optional Equipments

    1. Remote control with cable (Opening and closing)

    2. Remote control without cable (Opening and closing)

    3. Gas density indication4. Gas density indication with alarm contact

    5. Voltage Transformers

    6. Cable fault indication device

    7. Surge arresters

    8. Arc-gas channel

    Technical Data

    Rated voltage [kV] 12 17,5 24

    Rated current [A] 630/1250 630/1250 630/1250

    Rated short-time withstand current [kA] 20 20 20

    Maximum rated duration of short circuit [s] 1 1 1

    Net Weight kg 360 360 360Gross Weight kg 403 403 403

    Width with pack mm 800 800 800

    Depth with pack mm 1170 1170 1170

    Height with pack mm 1750 1750 1750

    940

    1100

    DME 04 1600

    750

    DME 24 - 04

    Vacuum or SF6

    Circuit Breaker Unit

    Type DME 24 - 04DME 24Seres

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    940

    1100

    DME 05

    1600

    750

    DME 24 - 05

    Standart equipment

    1. 3 Position SF6 disconnector

    (open - closed - earthed)

    2. Operating mechanism with mechanical position indication

    3. Circuit breaker, vacuum or SF6 type

    4. Current transformers (toroidal or

    standard type )

    5. Over current protection relay

    6. Voltage indicator device

    7. Heather

    8. Earthing bar

    9. Busbars

    10.Interlocking unit

    11. Auxiliary contacts for close(2NO+2NC) and earth (2NO+2NC) position

    Optional Equipments

    1. Remote control with cable (Opening and closing)

    2. Remote control without cable (Opening and closing)

    3. Gas density indication4. Gas density indication with alarm contact

    5. Voltage Transformers

    6. Cable fault indication device

    7. Arc-gas channel

    Technical Data

    Rated voltage [kV] 12 17,5 24

    Rated current [A] 630/1250 630/1250 630/1250

    Rated short-time withstand current [kA] 20 20 20

    Maximum rated duration of short circuit [s] 1 1 1

    Net Weight kg 400 400 400

    Gross Weight kg 443 443 443Width with pack mm 800 800 800

    Depth with pack mm 1170 1170 1170

    Height with pack mm 1750 1750 1750

    Vacuum or SF6

    Sectionalising Metering Unit

    Type DME 24 - 05DME 24Seres

    1

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    12

    Technical Data

    Rated voltage [kV] 12 17,5 24

    Rated current [A] 630/1250 630/1250 630/1250

    Rated short-time withstand current [kA] 20 20 20

    Maximum rated duration of short circuit [s] 1 1 1

    Net Weight kg 440 440 440

    Gross Weight kg 483 483 483

    Width with pack mm 800 800 800

    Depth with pack mm 1170 1170 1170

    Height with pack mm 1750 1750 1750

    1600

    750

    Standart equipment

    1. 3 Position SF6 disconnector(open - closed - earthed)

    2. Operating mechanism with

    mechanical position indication

    3. Voltage transformers

    4. Current transformers

    5. Voltage indicator device

    6. Heather

    7. Earthing bar

    8. Busbars

    9. Interlocking unit

    10.Auxiliary contacts for close

    (2NO+2NC) and earth (2NO+2NC) position

    Optional Equipments

    1. Gas density indication2. Gas density indication with alarm contact

    3. Motor operation device

    4. Cable fault indication device

    5. Surge arresters

    6. Arc-gas channel

    940

    DME 24 - 05/A

    Sectionalising Metering Unitwith Disconnector Type

    Type DME 24 - 05 / ADME 24Seres

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    Standart equipment

    1. Voltage indicator device

    2. Busbars

    3. Earthing bar

    4. Heater

    5. Interlocking unit

    Optional Equipments

    1. Earthing switch2. Voltage transformers

    3. Current transformers

    Technical Data

    Rated voltage [kV] 12 17,5 24

    Rated current [A] 630/1250 630/1250 630/1250

    Rated short-time withstand current [kA] 20 20 20

    Maximum rated duration of short circuit [s] 1 1 1

    Net Weight kg 110 110 110

    Gross Weight kg 140 140 140

    Width with pack mm 420 420 420

    Depth with pack mm 1070 1070 1070

    Height with pack mm 1750 1750 1750

    940

    1600

    500

    DME 24 - 07

    Opt: 375

    Incoming Cable Connection Unit

    Type DME 24 - 07DME 24Seres

    3

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    14

    Standart equipment

    1. Earthing switch 2. Voltage indicator device

    3. Busbars

    4. Earthing bar

    5. Heater

    6. Interlocking unit

    Optional Equipments

    1. Voltage transformers2. Current transformers

    Technical Data

    Rated voltage [kV] 12 17,5 24

    Rated current [A] 630/1250 630/1250 630/1250

    Rated short-time withstand current [kA] 20 20 20

    Maximum rated duration of short circuit [s] 1 1 1

    Net Weight kg 110 110 110

    Gross Weight kg 140 140 140

    Width with pack mm 420 420 420

    Depth with pack mm 1070 1070 1070

    Height with pack mm 1750 1750 1750

    940

    1600

    500

    DME 24 - 07/A

    Opt: 375

    Incoming Cable Connection Unit

    Type DME 24 - 07 / ADME 24Seres

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    Technical Data

    Rated voltage [kV] 12 17,5 24

    Rated current [A] 630 630 630

    Rated short-time withstand current [kA] 20 20 20

    Maximum rated duration of short circuit [s] 1 1 1

    Net Weight kg 420 420 420

    Gross Weight kg 463 463 463

    Width with pack mm 420 420 420

    Depth with pack mm 1070 1070 1070

    Height with pack mm 1750 1750 1750

    1600

    750 940

    DME 24 - 08

    Standart equipment

    1. 3 Position SF6 load break switch

    (open - closed - earthed)2. Operating mechanism with

    mechanical position indication

    3. Voltage transformers

    4. Current transformers

    5. Bushing

    6. Voltage indicator device

    7. Heather

    8. Earthing bar

    9. Busbars

    10.Interlocking unit

    11.Auxiliary contacts for close(2NO+2NC) and earth (2NO+2NC) position

    Optional Equipments

    1. Remote control with cable (Opening and closing)

    2. Remote control without cable (Opening and closing)3. Gas density indication

    4. Gas density indication with alarm contact

    5. Motor operation device

    6. Cable fault indication device

    7. Arc-gas channel

    Metering Unit

    Type DME 24 - 08DME 24Seres

    5

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    16

    Optional Equipments

    1. Energymeter

    2. Hv fuses

    3. Surge arresters

    Technical Data

    Rated voltage [kV] 12 17,5 24

    Rated current [A] 630/1250 630/1250 630/1250

    Rated short-time withstand current [kA] 20 20 20

    Maximum rated duration of short circuit [s] 1 1 1

    Net Weight kg 370 370 370

    Gross Weight kg 413 413 413

    Width with pack mm 800 800 800

    Depth with pack mm 1170 1170 1170

    Height with pack mm 1750 1750 1750

    940

    1600

    750

    DME 24 - 08 / A

    Standart equipment

    1. Bushings

    2. Current Transformers (toroidal or standard)

    3. Voltage transformers

    4. Busbars

    5. Earthing bar6. Ammeter ,Voltmeter

    7. Heather

    8. Interlocking unit

    9. Voltage indicator device

    Universal Metering Unit

    Type DME 24 - 08 / ADME 24Seres

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    940

    Technical Data

    Rated voltage [kV] 12 17,5 24

    Rated current [A] 630/1250 630/1250 630/1250

    Rated short-time withstand current [kA] 20 20 20

    Maximum rated duration of short circuit [s] 1 1 1

    Net Weight kg 170 170 170

    Gross Weight kg 200 200 200

    Width with pack mm 420 420 420

    Depth with pack mm 1070 1070 1070

    Height with pack mm 1750 1750 1750

    1600

    500

    DME 24 - 09

    Standart equipment

    1. Bushings

    2. Voltage indicator device3. Heather

    4. Earthing bar

    5. Busbars

    6. Interlocking unit

    Optional Equipments

    1. Voltage transformers

    2. Current transformers3. Earthing Switch

    Bus Riser Unit

    Type DME 24 - 09DME 24Seres

    7

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    18

    940

    Technical Data

    Rated voltage [kV] 12 17,5 24

    Rated current [A] 630/1250 630/1250 630/1250

    Rated short-time withstand current [kA] 20 20 20

    Maximum rated duration of short circuit [s] 1 1 1

    Net Weight kg 170 170 170

    Gross Weight kg 200 200 200

    Width with pack mm 420 420 420

    Depth with pack mm 1070 1070 1070

    Height with pack mm 1750 1750 1750

    1600

    500

    DME 24 - 09 / A

    Standart equipment

    1. Bushings

    2. Voltage indicator device3. Heather

    4. Earthing bar

    5. Busbars

    6. Interlocking unit

    Optional Equipments

    1. Voltage transformers

    2. Current transformers

    Bus Riser Unit

    Type DME 24 - 09 / ADME 24Seres

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    Standart equipment

    1. Bushings 2. Voltage indicator device

    3. Heather

    4. Earthing bar

    5. Busbars

    6. Interlocking unit

    7. Cable entry with cable support

    Optional Equipments

    1. Current transformers2. Earthing switch

    3. Surge arresters

    Technical Data

    Rated voltage [kV] 12 17,5 24

    Rated current [A] 630/1250 630/1250 630/1250

    Rated short-time withstand current [kA] 20 20 20

    Maximum rated duration of short circuit [s] 1 1 1

    Net Weight kg 90 90 90

    Gross Weight kg 120 120 120

    Width with pack mm 420 420 420

    Depth with pack mm 1070 1070 1070

    Height with pack mm 1750 1750 1750

    DME 08

    1600

    375 940

    DME 24 - 11

    Direct Busbar Connection Unit

    Type DME 24 - 11DME 24Seres

    9

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    20

    940

    Technical Data

    Rated voltage [kV] 12 17,5 24

    Rated current [A] 630/1250 630/1250 630/1250

    Rated short-time withstand current [kA] 20 20 20

    Maximum rated duration of short circuit [s] 1 1 1

    Net Weight kg 170 170 170

    Gross Weight kg 200 200 200

    Width with pack mm 420 420 420

    Depth with pack mm 1070 1070 1070

    Height with pack mm 1750 1750 1750

    1600

    500

    DME 24 - 11/A

    Standart equipment

    1. Bushings

    2. Current transformers3. Heather

    4. Earthing bar

    5. Busbars

    6. Interlocking unit

    7. Cable entry with cable support

    Optional Equipments

    1. Earthing switch

    2. Surge arresters

    Direct Busbar ConnectionUnit and Metering

    Type DME 24 - 11 / ADME 24Seres

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    COMPONENTS

    SF6 LOAD BREAK SWITCH & DISCONNECTOR

    DYA 36 - X4 / DGA 36 - X4

    Functioning concept:

    DYA 36 - X4 switches are made of an epoxy cast

    resin housing lled with SF6 gas at the pressure of

    150 kPa abs., operative life sealed. (Standard IEC

    60265-1)

    The moving contact are xed on the insulated

    rotary shaft inside the cast resin body, while the -

    xed contacts are mounted directly on the cast resin

    body. The rotary motion of the shaft is made by an ope-

    rating mechanism placed on the front. The switch

    has three different positions: closed, open and eart-

    hed, which naturally prevent any wrong operations.

    Technical DataLoad Break Switch

    DYA 36 - X4

    Disconnector

    DGA 36 - X4Earthing Switch

    Rated voltage 24 kV 24 kV 24 kV

    Rated current 630 A 630 - 1250 A

    Rated short circuit withstand current 20 kA - 1 sec 20 kA - 1 sec 20 kA - 1 sec

    Electrical endurance E2, E3 E2, E3 E1, E2

    Mechanical endurance M1 M1 M1

    Applied standardIEC 60265 - 1

    1000 Operations

    IEC 62271 - 102

    1000 Operations

    IEC 62271 - 102

    1000 Operations

    Charateristics:

    DYA 36 - X4 switches use sulphur hexauoride gas(SF6) for insulation and breaking.

    The active parts are placed in an insulating enclo-

    sure in accordance with the IEC standards for sealed

    pressure systems.

    IM6 products offer remarkable characteristics: Long

    service life - Maintenance-free active parts

    - Operating safety - Very low over-voltage level

    1

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    COMPONENTS

    Technical Data DV X5

    Rated voltage 12 kV 17.5 kV 24 kV

    Rated frequency [Hz] 50/60 50/60 50/60

    Rated lighting impulse withstand voltage [kV] 75 95 125

    Rated power frequency withstand voltage [kV] 28 38 50

    Rated current [A] 630/1600 630/1600 630/1600

    Rated short circuit breaking current [kA] 16 / 25 16 / 25 16 / 25Rated short circuit making current [kA] 40 / 63 40 / 63 40 / 63

    Rated short circuit duration [s] 3 3 3

    Pole centres [mm] 210 210 210

    VACUUM CIRCUIT BREAKERS

    DV X5

    Current interruption in vacuum:

    The vacuum circuit breaker does not require an

    interrupting and insulating medium. In fact, the

    interrupters do not contain ionisable material. In any

    case, on separation of the contacts a metal vapour arc is

    generated made up exclusively of melted and vaporised

    contact material.

    The metal vapour only remains supported by the

    external energy until the current is cancelled in the

    vicinity of natural zero. At that instant, the rapid reductionin the load density carried and the rapid condensation

    of the metallic vapour, leads to extremely rapid dielectric

    recovery.

    The vacuum interrupter therefore recovers the

    insulating capacity and the capacity to withstand the

    transient return voltage, denitively extinguishing the arc.

    Since high dielectric strength can be reached in the vacuum, even with minimum distances,

    interruption of the circuit is also guaranteed when separation of the contacts takes place a few

    milliseconds before passage of the current through natural zero.

    The special contacts design and material, as well as the limited duration and low voltage of the arc,guarantee minimum contact wear and long life. Furthermore, the vacuum prevents their oxidation and

    contamination.

    Operating mechanism:

    The low speed of the contacts, together with the reduced run and low mass, limit the energy required

    for the operation and therefore guarantee extremely limited wear of the system. The circuit breaker is

    therefore limited in maintenance.

    The DV Y5 - DV X5 circuit breakers use a mechanical operating mechanism, with stored energy and

    free release. These characteristics allow opening and closing operations

    independent of the operator. The DV Y5 - DV X5 circuit breaker operating mechanism is of simple

    conception and use and can be customised with a wide range of accessories which are easy and rapidto install. This simplicity converts into greater reliability of the apparatus.

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    COMPONENTS

    SF6 GAS CIRCUIT BREAKERS

    DS 5AG 3

    Technical Data DS 5AG 3

    Rated voltage 12 kV 17.5 kV 24 kV

    Rated frequency [Hz] 50/60 50/60 50/60

    Rated lighting impulse withstand voltage [kV] 75 95 125

    Rated power frequency withstand voltage [kV] 28 38 50

    Rated current [A] 630/1250 630/1250 630/1250

    Rated short circuit breaking current [kA] 16 / 25 16 / 25 16 / 25Rated short circuit making current [kA] 40 / 63 40 / 63 40 / 63

    Rated short circuit duration [s] 3 3 3

    Pole centres [mm] 210 210 210

    Introduction:

    Demita SF6 gas circuit breakers are p roduced in

    accordance with TSE 3039 also they have been tested at

    CESI laboratory according to IEC 62271-100 and they

    have the test certicate.

    Presentation:

    Demita SF6 gas circuit breakers are suitable for all

    system requirements up to 36 kV rated voltage,

    1250 A rated current. Sulphur hexauoride for insulationand breaking is used in Demita SF6 gas circuit breakers.

    The extinguishing chamber and components are kept

    in a sealed pressure system type envelopes with high

    insulation.

    SF6 Gas and interrupting system:

    SF6 gas has very delectric and normally it is (without the

    effect of the electrial arc) non - toxic, odourless and has

    electronegative fast regeneration features. The dielectric

    strength of SF6 gas atmospheric pressure is appox. 2,5 or

    2,6 times more than the air.

    Circuit breaker pole:

    The pole enclosures are produced from epoxy resin which has overpressure security factor higher than 10

    times of the operational pressure. In the pole enclosures, the xed contacts are at the top. The gas

    leakages are kept at minimum level to ensure the operational security during the life of the pole. Measuring

    the internal pressure, as needed ingas lling and gas addition operations, can be contolled with a valve

    which is installed on the pole cover. The arc breaking system is self blowing (PUFFER) type. The pole

    internal gas pressure is 1,5 - 3,5 bars. During the arc interrupting, pressure increases momentary just a little.

    In the event of overpressure in a pole, the bottom cover will break at 1/3 of pole witstand pressure, allowing

    excess pressure to escape instantaneously. In order to neutralise the chemical products which were created

    during breaking, molecular sieves are put in the poles.

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    COMPONENTS

    Rated voltage 12 kV - 17.5 kV - 24 kV

    Rated short circuit withstand 16 kA / 1 sn 20 kA / 1 sn

    Current 1 kA / 1 sn*

    Standards applied IEC 62271 - 103

    Earthing switch:

    *Used at swtch fuse combnaton cubcle at the downstream

    Voltage transformers

    The resin insulated voltage transformers are used for the feeding ofmeasuring instruments and protection. They are suitable either for

    xed installation or mounted on withdrawable trucks. They comply with

    IEC 60044 - 2 Standards. The dimensions of the xed version comply

    with DIN standards 42600 Narrow Type. The withdrawable version

    equipped with fuses is custom made. The voltage transformers can be

    tted either with one or two poles. Their performances and precision

    classes comply with the functional requirements of the apparatus they

    are connected to. The withdrawable version is equipped with medium

    voltage protection fuses, their replacement can be carried out while the

    switchboard is in service.

    Current transformersThe current transformers are resin insulated and suitable for the

    feeding of measuring instruments and protections. These transformers

    can have a wound core or bushing bar with one or more cores. Their

    performances and precision classes comply with the apparatus

    requirements.

    The current transformers comply with IEC 60044 - 1 Standard. Their

    dimensions meet the requirements of DIN 42600 Standards. The

    current transformers can be equipped also with a capacitive socket for

    being connected to voltage indicator lambs.

    Toroidal current transformersThe toroidal current transformers are resin insulated and suitable for

    the feeding of measuring instruments and protection. These

    transformers can have a ring or a split core. Their performances and

    precision classes comply with the apparatus requirements. They are

    suitable both for measuring phase currents and determining earth fault

    currents. They meet the requirements of IEC 60044 - 1 Standards.

    Protection relayDMC Series switchboards can be equipped with different brand relay

    l ike PNC Microelettirica Sicientica, ABB, SIEMENS or AREVA.

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    Tel: +90 380 5412201

    +90 380 5412655

    Export Department: +90 541 5413086

    Fax: +90 380 5412894

    E-mail: [email protected]

    Distributor Company

    Internet: www.demitas.com.tr

    DEMTAPOWER SYSTEMS