sf6 gas insulated ring main unit (rmu) - adc energy. sf6 rmu_150223...sf6 gas insulated ring main...

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SF6 Gas Insulated Ring Main Unit (RMU)

V2.0

SF6 Gas Insulated Ring Main Unit (RMU) 2 _ 3

Ratings of 17.5kV, 24kVCompact sizeVacuum interrupters for circuit breakerSpring charge mechanism for circuit breakerIndoor and outdoor applicationEasy cable connection by appropriate bushing and connector arrangementFully interlocked system for safe operationPerfectly grounded body

Maintenance freeLow rate of gas leakage below 0.1% for 30 yearsRust proof structure for preventing corrosionGas rupture disk installed to prevent damage by gas expansionSelf-powered protection relay(ETR20/ETR20H)digital relay (ETCCU104/ETR304) availableCommunication protocol [DNP3.0, MODBUS, IEC60870-5-101/104]Live line Indication lamp for warning

ENTEC SF6 Gas Insulated Ring Main Unit is designed to have distribution level of up to 24kV, and

rated currents up to 630A. Mainly used in malls, shopping centers, industrial areas and other

locations of where the load is concentrated and areas with increasing demand of load. It is installed

on the ground at the withdrawal point to prevent the fault spreading out to other branch line.

It contains tee-off circuit breaker that has stainless steel enclosure and insulate with SF6 gas in

3-position switch. By adopting vacuum interrupter, it can perform 2,000 times of mechanical

operation. In addition, each phase is mechanically interlocked with main circuits to maximize the

safety. Self-powered relay is available for precisely operating at a set time and detect fault

current. For monitoring line in distribution automation system, digital relay controller can be

equipped as an optional to be configured to the system.

Key Features & Characteristics


Features

Vacuum Interrupter

Voltage Indicator

Mechanism

Protection Relay

Current Transformer

•Spring charged mechanism•3 cycles interruption capability•Manual / electrical operation option

•Self-powered relay [ETR20/ETR20H] and Digital Relay[ETCCU104/ETR304] available •Phase overcurrent protection•Ground overcurrent protection

•Monitoring current•Supply power to relay (Auxiliary power supply not required)

•3 phases voltage sensing and indicating it with LED

Circuit Breaker

Load Break Switch

Operation •Any fuse blowout opens all 3 phases automaticallyFuse

Mechanism

•Spring toggle mechanism•Rotary type (3 position switching : open-close-earth)•Natural interlock system between main and earth switch


Table 1

Rating L (Length) (mm) D (Diameter) (mm) S (Operating Stroke) (mm)Rated voltage

12kV

24kV

442

35

442

10 to 50

63 to 125

160 to 200

10 to 25

31.5 to 40

50 to 80

100 to 200

50~88

Table 2 Rating in a overload, ( -25˚C < T <40˚C )

Transformer Capacity (kVA)

Voltage(kV)

12(kV)

24(kV)

3

3.3

4.2

5.5

6

6.6

10

11

13.8

15

20

22

50

20

20

20

16

16

10

10

10

10 16

20

8050

80 125

50

50

10 31.5 50

10 16 25 31.5 40 6320

10 16 20 25 31.5 50 63 80 100

80 100

40

75

31.5

25

25

20

20

20

100

40

25

16

16

125

40

20

160

31.5

31.5

16

200

63

63

40

40

25

20

20

250

80

63

50

50

31.5

25

25

25

315

100

63

50

40

40

31.5

400

125

63

40

500

160

100

80

40

630

160

125

100

100

80

63

800

160

125

125

100

80

63

1000

160

160

125

100

80

63

63

1250

160

125

100

100

80

1600

160

125

100

2000

Ø6

Ø45

SL

D

33

Protection relay and control panel

General case, IEC 60282-1, IEC 62271-105

50

40

5025

6325

25

25

50

40 80

Selection

Protection

Metering

Communication

•Self-powered relay [ETR20 & ETR20H]•Digital relay[ETR304, ETCCU104]

•Voltage, current, frequency, energy, demand, unbalance, harmonics

•Built-in RTU•Communication protocol(DNP3.0, MODBUS, IEC60870-5-101/104)•Interface software available for downloading events, setting change and etc.

Applicable Standard : IEC60282-1


Self-powered Relay

Overcurrent relay ETR20 and ETR20H is used to control Ring Main Unit, identifying lines and segmenting fault sector.

It is self-powered micro-processor based protection relay.

Comparing to mechanical protection relays, ETR20 and ETR20H operates more precisely at preset time , detect fault

current and send trip signal to RMU immediately.

ETR20 and ETR20H provide phase, instantaneous, delayed time ground, instantaneous ground overcurrent elements.

Selector switch for convenient setup of protection elements, LED, trip indicator provided.

ETR20 & ETR20H Self-powered relay

Standard Current

•Phase fault protection standard current(IS) : 0.05, 0.1, 0.15, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0 (x CT)•Ground fault protection standard current(IES) : 0.02, 0.04, 0.08, 0.12, 0.16, 0.24, 0.32, 0.4, 0.5, 0.6, 0.7, 0.8 (x CT)

Time-Current curve according to overcurrent protection element setting

[ETR20H – Horizontal Type]

[ Inverse time curve applied ] [ Definite time curve applied ]

[ETR20H – Vertical Type][ETR20]

Overcurrent protection element setting can be set separately for phase fault element and ground fault element and depending on user’ssetting; various T-C curve can be applied.

CT Value

100:1

50:1

10A

5A

5A, 2A

5A, 1A

100A, 80A

50A, 40A

Phase fault, Ground fault

Phase fault, Ground fault

Standard current setting range

Minimum Maximum

Minimum operation current

Protection element

Digital Relay for Distribution Automation System


[ETCCU104] [ETR304]

Multi-Way Control Communication Unit ETR304 and ETCCU104 are designed to control Ring Main Unit locally or remotely. It

receives measurements and status information from circuit breaker and analyzes voltage and current in the distribution line.

To help end-user to analyze specifically, voltage and current measurement with rapid sampling of 128 per cycle and sag, swell,

interrupt, harmonic wave, voltage and current unbalance and power quality monitoring functions are provided. Alongside,

ETIMS interface software is provided which is user friendly. It will make end-users to easily download records, events file and

set up functions.

ETR304 & ETCCU104 Digital relay

Communication

ProtectionPhase, Ground, Negative Sequence Time OvercurrentPhase, Ground, Negative Sequence High Current tripCold Load PickupPhase, Ground, Negative Sequence Directional(forward, reverse) protectionUnder, Over Voltage and Frequency detection and alarmPhase difference, Live Line, Demand, User-curveTime-Current curve editableIEEE, IEC and 37 non-standard inverse time curves

MeteringVoltage, CurrentKW and KWH, Power factorDemand watts and VARs and frequencyLoad profile and Oscillogram(fault wave)

Available protocol Multiple Communication Port User configurable map Remote Control application

DNP 3.0, MODBUSIEC60870-5-101/104

RS-232 port, RS-485Ethernet(RJ-45)Fiber-optic(Optional)

Full & Half Duplex ModemDial-up Modem(option)

Data Base remapping for Analogue input and output, Digital(Binary) input and output, CounterProgrammable Logic Control

Diagram17.5kV & 24kV SF6 Gas Ring Main Unit 4 way (2CB + 2SW)

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

‘Open-Close-Earth’ Switch operation

Live line indicator

Main circuit bushing

Circuit Breaker ‘Open’ operation

Circuit Breaker ‘Close’ operation

Lifting lugs

Gas pressure gauge

Nameplate

Connector support

Grounding bus bar

Current transformer for earth fault

Current transformer for relay

Earth fault indicator (option)

Opening relay (option)

Self-power relay(option)

16

17

18

19

20

Switch operation

T-elbow Connector

Main circuit bus bar

Arc extinguishing chamber

Earth circuit bus bar

21

22

23

24

Circuit Breaker mechanism

Ring switch (3-position) mechanism

Vacuum Interrupter fixing support

Bus bar fixing support


Diagram


A B C

EVD-12NENTEC ELECTRIC & ELECTRONIC CO,, LTD.

A B C


A 1 B 1 C 1 A 2 B 2 C 2 A 3 B 3 C 3 A 4 C 4B 4A 1 B 1 C 1 A 2 B 2 C 2 A 3 B 3 C 3 A 4 C 4B 4

0 00 0 00 00 0 0

0 00 0 0 0 00 0 0

0 00 0 0

12.5/1

0.025

25.8

정격연속전류(A)

ETGRU-4W2S2F-M-125

25.8kV 가스절연부하개폐기(지중용)

중 량(Kg)

가스량(kg)

정격전압(kV)

제조년월일

형식

최저보증가스압력(MPa)

정격가스압력(MPa)

절연물의종류

정격부하개폐전류(A)

정격투입전류(kA,peak)

정격단시간전류(kA,sec)

630

SF6 GAS

0.06

32.5

630

정격충격내전압(kV)125

구매오더번호

광고물 부착방지도장도장 : 부도장 :

제조번호

인텍전기전자주식회사TEL: (031)299-8400

퓨즈 정격전류(A) 63

F4F3S2S1

접지조작시 볼트를풀고 동작하시요( )접지잠금장치

닫힘

접지

열림

1

COUNTER

! 주의

-활선시 조작불가

-조작 금지(접지)-휴전시만 조작함

용단 시 : 녹색 정상 시 : 적색

퓨즈 용단표시기

4

COUNTER

닫힘

! 주의




접지

열림

! 주의



닫힘

접지

열림

용단 시 : 녹색 정상 시 : 적색

퓨즈 용단표시기

3

COUNTER

닫힘

! 주의




접지

열림

! 주의



닫힘

접지

열림


닫힘

접지

열림

2

COUNTER

! 주의



( )

WIKA

0

MPa

-0.05 0.05

-0.1 0.10.03

-10

압력저하 잠금압력(0.025MPa )

-30 -20

0.01

-0.01

0.02

0

400 10 3020

온도( ° )C50

SF6 GAS 압력 - 온도 특성곡선

충진압력(0.06MPa,20° )

가스방출장치 동작압력(0.15~0.34MPa)

압 력(MPa)

0.05

0.06

0.04

0.07

0.34

0.15

0.39

C

최저 보증압력(0.025MPa)

±0.005

A B C


A B C


COUNTER

1

2

3

4

5

6

7

8

9

‘Open-Close-Earth’ Switch operation

Operating counter

Ground terminal

Gas injection valve

Nameplate

Gas pressure gauge

Fuse switch operation

Fuse switch protection cover

Live line indicator

10

11

12

13

14

T-elbow Connector

Fuse switch (3-position) operation

Arc extinguishing chamber

Fuse canister

Main circuit bus bar

15

16

17

18

19

Ring switch

Ground circuit bushing

Ground circuit bus bar

Bus bar fixing support

Main circuit bushing

Diagram24kV SF6 Gas Ring Main Unit 3 way (1Fuse + 2SW)

Diagram

A

B

Depth

1,634mm

1,274mm

823mm

17.5kV SF6 Gas RMU (2SW+2CB & Self powered)

A

B

C

D

1,634mm

1,224mm

1,588mm

823mm

17.5kV Gas Ring Main Unit (2SW+2CB & Automation Type)

A

B

C

Depth

A

B

C

F(Fuse)

H

W

1,522mm

1,200mm

1,390mm

365mm

24kV SF6 Gas Ring Main Unit (3SW + 1 CB & self powered)

OFF

ON

EARTH

OFF

ON

EARTH

OFF

ON

EARTH

OFF

ON

EARTH

395mm

555mm

318mm

488.5mm

950mm

1,624mm

24kV Gas Ring Main Unit (2SW + 2 Fuse)


Diagram / Ratings

SF6 Gas Insulated Ring Main Unit (RMU) 10_ 11

RatingsSF6 Gas Ring Main UnitItem

17.5kV

50/60Hz

50kV

110kV BIL

630A

630A

200A

21kA, 3 sec

21kA, 3 sec

21kA, 3 sec

21kA, 3 sec

54.6kA

54.6kA

54.6kA

21kA, 3 sec

54.6kA

10A

31.5A

21kA, 1 sec

21kA, 1 sec

0.11 MP

IP54/ IP43

Spring Charged

24kV

50/60Hz

50kV

125kV BIL

630A

630A

200A

16kA, 1 sec

16kA, 1 sec

16kA, 1 sec

16kA, 1 sec

40kA

40kA

40kA

16kA, 1 sec

40kA

40A

40A

16kA, 1sec

16kA, 1sec

0.13 MPa

Rated voltage

Frequency

Power frequency withstand voltage

Impulse withstand voltage

Earthing Switch Short-time withstand current

Earthing Switch Short circuit making current

Internal Arc Rating

Internal Arc Cable Box

Minimum Gas Pressure

Degree of protection(Outdoor / Indoor)

Operating mechanism

Applicable Standards

Rated current

Short-time withstand current

Short circuit breaking current

Short circuit making current

Cable Charging Breaking

Current

Ring switch

Circuit breaker

Fused switch

Ring switch

Circuit breaker

Fused switch

Circuit breaker

Ring switch

Circuit breaker

Fused switch

Ring switch

Circuit breaker

IEC 62271-1

IEC 62271-100

IEC 62271-102

IEC 62271-103

IEC 62271-200

225-38 Choirubaekro, Bongdam-Eup, Hwaseong-City, Gyunggi-Do, Republic of KoreaPost code : 445-893 TEL: +82-31-299-8400 FAX : +82-31-299-8401/ 2http://www.entecene.co.kr E-mail : [email protected]

*Note. Product structure and arrangement shall be modified without notice. 1502

sf6 gas insulated ring main unit (rmu) - adc energy. sf6 rmu_150223...sf6 gas insulated ring main...

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