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
SF6 Gas Insulated Ring Main Unit (RMU)
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
SF6 Gas Insulated Ring Main Unit (RMU) 4 _ 5
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
SF6 Gas Insulated Ring Main Unit (RMU)
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
SF6 Gas Insulated Ring Main Unit (RMU) 6 _ 7
[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
SF6 Gas Insulated Ring Main Unit (RMU)
Diagram
SF6 Gas Insulated Ring Main Unit (RMU) 8 _ 9
A B C
EVD-12NENTEC ELECTRIC & ELECTRONIC CO,, LTD.
A B C
EVD-12NENTEC ELECTRIC & ELECTRONIC CO,, LTD.
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
-활선시 조작불가
-조작 금지(접지)-휴전시만 조작함
접지조작시 볼트를풀고 동작하시요( )접지잠금장치
접지
열림
! 주의
-활선시 조작불가
-조작 금지(접지)-휴전시만 조작함
닫힘
접지
열림
용단 시 : 녹색 정상 시 : 적색
퓨즈 용단표시기
3
COUNTER
닫힘
! 주의
-활선시 조작불가
-조작 금지(접지)-휴전시만 조작함
접지조작시 볼트를풀고 동작하시요( )접지잠금장치
접지
열림
! 주의
-활선시 조작불가
-조작 금지(접지)-휴전시만 조작함
닫힘
접지
열림
접지조작시 볼트를풀고 동작하시요( )접지잠금장치
닫힘
접지
열림
2
COUNTER
! 주의
-활선시 조작불가
-조작 금지(접지)-휴전시만 조작함
( )
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
EVD-12NENTEC ELECTRIC & ELECTRONIC CO,, LTD.
A B C
EVD-12NENTEC ELECTRIC & ELECTRONIC CO,, LTD.
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)
SF6 Gas Insulated Ring Main Unit (RMU)
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