XGN-12 12KV Ring Main Unit
Model meaning
SF6 Load switch Modular switch cabine
Normal service condition
◆Altitude:not exceeding 2000m;
◆Ambient temperature:minimum temperature-25℃,maximum temperature+40℃;
◆Ambient humidity:daily average not exceeding 95%;monthly average not exceeding 90%;
◆Seismic resistance:8;
There should be no explosive or corrosive gas in the ambient air,and no severe vibration or impact in the installation site.
Main purpose
◆ The XGN□-12 modular metal enclosed ring main unit is suitable for power system with rated voltage of 12kV and rated frequency of 50Hz,and is widely used in industrial and civilian cable ring network and power supply terminal.
◆The XGN □-12 modular metal enclosed ring main unit is particularly suitable for the following places:urban residential area and industrial and mining enterprise power distribution,small secondary substation,switching station,box-type substation,shopping mall,airport,subway,wind power generation,hospital,sports venue,railway,bridge,tunnel,etc.
Reference standard
GB/T191 Packaging-Pictorial Marking for Handling of Goods (lS0 780-111997,MOD)
GB1985-2004 High-voltage alternating-current disconnectors and earthing switches(IEC 62271-102:2002.MOD)
GB 3804-2004 High-voltage alternating current switches for rated voltage above 3.6 KV and less than 40.5 KV (lE060265-1:1998, MOD)
GB 3906-1991 A.C. metal-enclosed switchgear for rated voltages of 3~35kV(neg IEC 60298:1990)
GB 4208-1993 Degrees of protection provided by enclosure (IP code) legv IEC 60529:1989
GB/T 5582-1993 External insulation pollution classes of high-voltage electric power equipments (eqv IEC 507:1991)
GB/T 6388 Transport package shipping mark
GB 9969.1 General principles for preparation of instructions for use of industrial products
GB/T11022-1999 Common specifications for high-voltage switchgear and controlgear standards (aqv IEC 60694:1996)
GB/T 11023-1989 Test method of SF6 gas tightness for high-voltage switchgear
GB/T13384 General specifications for packagings of mechanical and electrical products
GB/T14436 General principles of industrial product guarantee documents
GB16926-1997 High-voltage Alternating Current Switch-fuse Combinations (eqv IEC 60420:1990)
JB/T 8754-1998 Method for Model Compilation of High Voltage Switchgear
DL/T 404-1997 Technical Conditions for Ordering Indoor Ac High Voltage Switchgear (neq IEC 60298:1981)
Main technical parameters
|
Item name |
Unit |
Load switch cabinet |
Combination electrical cabinet |
Circuit breaker cabinet |
|
Rated voltage |
kV |
12 |
||
|
Rated frequency |
Hz |
50/60 |
||
|
Rated current |
A |
|
|
|
|
Main busbar |
A |
630 |
||
|
Branch busbar |
A |
630 |
125(depending on the rated current of the fuse) |
630 |
|
Rated insulation level |
kV |
|
|
|
|
Power frequency withstand voltage(phase-phase and phase-ground) |
kV |
42 |
|
|
|
Power frequency withstand voltage (across isolating distance) |
kV |
48 |
||
|
Power frequency withstand voltage(control and auxiliary circuit) |
kV |
2 |
||
|
Lightning impulse withstand voltage(phase-phase and phase-ground) |
kV |
75 |
||
|
Lightning impulse withstand voltage(across isolating distance) |
kV |
85 |
||
|
Rated short-time withstand current(r.m.s) |
kA |
20 |
- |
25 |
|
Main circuit |
kA |
50 |
- |
63 |
|
Ground circuit |
kA |
50 |
80 |
63 |
|
Rated peak withstand current(peak) |
kA |
|
31.5 |
25 |
|
Rated short-circuit making current(peak) |
A |
- |
1750 |
|
|
Rated short-circuit breaking current |
A |
630 |
|
- |
|
Rated transfer current |
A |
630 |
- |
630 |
|
Rated active load breaking current |
A |
10 |
- |
15 |
|
Rated closed-loop breaking current |
|
IP3X |
||
|
Rated cable charging breaking current |
Time |
|
|
|
|
Protection level |
|
5000 |
5000 |
10000 |
|
Mechanical life |
|
2000 |
2000 |
2000 |
|
Load switch |
|
|
|
|
|
Ground switch |
|
|
|
|
Scheme example
Primary scheme
|
Main busbar TMY-3(40×8) |
D01 |
|
XGN□-12 Primary system diagram |
|
|
Configuration |
Outgoing cabinet |
|
FLN36-12Load switch FLN36-12 |
1 |
|
Load switch FLRN36-12D |
|
|
Voltage indicator DXN-T |
1 |
|
Current transformer LZZBJ9-10 |
|
|
Fuse XRNT□A |
|
|
Voltage transformer JDZ-10/0.1kV |
|
|
Lightning arrester HY5WS-17/50 |
3 |
|
Fuse XRNP-10/□A |
|
|
Metering instrument |
|
|
Protection method |
|
|
Auxiliary function |
|
|
Operation method |
Manual operation |
|
Cabinet W×D×H(mm) |
375×1000×1635 |
Standard configuration and features
◆630A main busbar
◆Load switch:FLN36-12D/T630-20
◆Three-station load switch(closing,isolation,grounding) or two- station (closing,isolation)
◆ The switch operation end is equipped with visual window
◆The main switch and ground switch are equipped with two separate operation holes,which are mutually locked
◆Load switch and ground switch position indication
◆ The switch body is equipped with capacitive voltage indicator
◆SF6 gas pressure gauge,and density relay can be equipped with
◆The ground switch is interlocked with the front panel of the cable room
Optional configuration and features
◆Reserved busbar expansion
◆Load switch operation motor:AC220V/110V DC220V/110V/48V
◆Short circuit and ground fault indicator
◆Lightning protection device(distribution type,power station type,trip type)
◆Measuring CT and meter
◆PT,providing operating power supply
◆Grounding locking for live incoming line(when the lower cable is live,the ground switch and lower door should be locked)AC110V/220V
◆Auxiliary contact:main switch 4NO+4NC ground switch 2NO+2NC
Primary scheme
|
Main busbar TMY-3(40×8) |
D02 |
|
XGN□-12 Primary system diagram |
|
|
Configuration |
Outgoing cabinet |
|
FLN36-12Load switch FLN36-12 |
|
|
Load switch FLRN36-12D |
1 |
|
Voltage indicator DXN-T |
1 |
|
Current transformer LZZBJ9-10 |
|
|
Fuse XRNT□A |
3 |
|
Voltage transformer JDZ-10/0.1kV |
|
|
Lightning arrester HY5WS-17/50 |
|
|
Fuse XRNP-10/□A |
|
|
Metering instrument |
|
|
Protection method |
|
|
Auxiliary function |
|
|
Operation method |
Manual operation |
|
Cabinet W×D×H(mm) |
375×1000×1635 |
Standard configuration and features
◆630A main busbar
◆Load switch:FLN36-12D/T100-50
◆Three-position load switch(closing,isolation,grounding)
◆The ground switch at the beginning and end of the fuse is mechanically linked
◆Fuse tripping indication and signal remote transmission
◆The switch operation end is equipped with visual window
◆ The main switch and ground switch are equipped with two separate operation holes, which are mutually locked
◆Load switch and ground switch position indication
◆The switch body is equipped with capacitive voltage indicator
◆SF6 gas pressure gauge,and density relay can be equipped with
◆The ground switch is interlocked with the front panel of the cable room
Optional configuration and features
◆Reserved busbar expansion
◆Load switch operation motor:AC220V/110VDC220V/110V/48V
◆Short circuit and ground fault indicator
◆Measuring CT and meter
◆Voltage loss trip AC220V
◆Overcurrent relay:GL25/5
◆Auxiliary contact:main switch 4NO+4NC ground switch 2NO+NC
◆Trip coil:AC220V/110VDC220V/110V/48V
◆Fuse blown(fault signal):1NO
◆Pressure gauge with signal:1NO
Primary scheme
|
Main busbar TMY-3(40×8) |
D03 |
|
XGN□-12 Primary system diagram |
|
|
Configuration |
Bus-tie cabinet (lifting cabinet) |
|
Load switch FLN36-12 |
|
|
Load switch FLRN36-12D |
|
|
Voltage indicator DXN-Q |
1 |
|
Current TransformerLZZBJ9-10 |
|
|
Fuse XRNT□A |
|
|
Voltage transformer JDZ-10/0.1kV |
|
|
Lightning arrester HY5WS-17/50 |
|
|
Fuse XRNP-10/□A |
|
|
Metering instrument |
|
|
Protection method |
|
|
Auxiliary function |
|
|
Operation method |
|
|
Cabinet W×D×H(mm) |
375×1000×1635 |
Standard configuration and features
◆630A main busbar
◆Capacitive voltage indicator
◆Connecting sleeve and busbar
◆Cable room front panel interlock
Optional configuration and features
◆Reserved busbar expansion
◆Short circuit and ground fault indicator
◆Metering CT and meter
◆Lightning protection device(distribution type,power station type,trip type)
Primary scheme
|
Main busbar TMY-3(40×8) |
D04 |
|
XGN□-12 Primary system diagram |
|
|
Configuration |
Metering cabinet |
|
Load switch FLN36-12 |
|
|
Load switch FLRN36-12D |
|
|
Voltage indicator DXN-Q |
1 |
|
Current transformer LZZBJ9-10 |
2 |
|
Fuse XRNT□A |
|
|
Voltage transformer JDZ-10/0.1kV |
2 |
|
Lightning arrester HY5WS-17/50 |
|
|
Fuse XRNP-10/□A |
3 |
|
Meteringinstrument |
|
|
Protection method |
|
|
Auxiliary function |
|
|
Operation method |
|
|
Cabinet W×D×H(mm) |
750×1000×1635 |
Standard configuration and features
◆2LZZBJ9 current transformers
◆2JDZ type voltage transformers
◆Protective PT fuse
◆Cable room front panel interlock
Optional configuration and features
◆1voltmeter with transfer switch
◆1ammeter with transfer switch
◆3 CTs
◆3 PTs
◆Capacitive voltage indicator indicating that the switchgear is live
◆Electric meter
◆Load control
Structure and basic component of load switchgear
XGN□-12(II)Cabinet structure
◆Busbar room
◆Load switch
◆Cable room
◆Operating mechanism,interlocking mechanism and low-voltage control room
Busbar room
The busbar room is arranged on the upper part of the cabinet.The main busbars are connected together in the busbar room and run through the entire row of switchgear.
Load switch
There is a three-position load switch installed in the switch room,and the shell of the load switch is made of epoxy resin casting,filled with sulfur hexafluoride(SF6)gas as the insulation medium.SF6 gas density meter or gas density meter with alarm contact can be installed i the switch room according to customer requirement.
Cable room
The load switch cabinet has a spacious cable compartment,mainly used for cable connection,allowing single-core or three-core cables to be connected with simple unshielded cable head.Meanwhile,the ample space can also be used to install components such as lightning arrester,current transformer and ground switch.According to the standard design,the cabinet door has observation window and safety interlock device.The bottom plate of the cable room is equipped with sealing cover and cable clamp of appropriate size with support frame.The bottom plate and front frame of the cable room can be removed for easy cable installation.
Operating mechanism,interlocking mechanism and low-voltage control room
The low-voltage room with interlocking also serves as control panel.The low-voltage room is equipped with spring operated mechanism with position indicator and mechanical interlock and device,as well as auxiliary contact,trip coil,emergency trip mechanism,capacitive voltage indicator,key lock and electric operation device.The low-voltage room space can also accommodate control circuit,metering instrument and protective relay.The 750mm wide cabinet has two identical low-voltage rooms that can accommodate more accessories.
The entire XGN15 switch cabinet can be divided into upper and lower parts,with the upper part of the cabinet including the busbar room,load switch, operating mechanism and low-voltage room,separated from the lower cable room.Therefore,the equipment installed in the upper unit can be safely an d conveniently inspected and modified,and the entire upper unit can be replaced.
Application example of switch cabinet solution
XGN□-12 Cabinet outline and installation dimension
