LW -12/630-20 outdoor SF6 primary and secondary fusion circuit breaker

LW-12 outdoor pole-mounted SF6 circuit breaker is a new generation product developed by our company in response to the new requirements of the State Grid's primary and secondary integrated pole-mounted switches for network access. The switch configuration fully conforms to the State Grid's primary and secondary integration requirements. Procurement, mass production. The switch has compact structure, reasonable layout and complete functions. All indicators meet the requirements of the primary and secondary integration of the State Grid. The integrated CT, zero-sequence CT and zero-sequence voltage sensor with unified parameters are used for protection and measurement, with a wide measurement range and high measurement accuracy. , The characteristics of high reliability, complete analog quantity is convenient to accurately determine various faults of the line.

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LW -12/630-20 outdoor SF6 primary and secondary fusion circuit breaker

Product Brief
LW-12 outdoor pole-mounted SF6 circuit breaker is a new generation product developed by our company in response to the new requirements of the State Grid's primary and secondary integrated pole-mounted switches for network access. The switch configuration fully conforms to the State Grid's primary and secondary integration requirements. Procurement, mass production. The switch has compact structure, reasonable layout and complete functions. All indicators meet the requirements of the primary and secondary integration of the State Grid. The integrated CT, zero-sequence CT and zero-sequence voltage sensor with unified parameters are used for protection and measurement, with a wide measurement range and high measurement accuracy. , The characteristics of high reliability, complete analog quantity is convenient to accurately determine various faults of the line.

Product Composition
◆ LW-12 type common box type SF6 column circuit breaker, built-in 3-phase current transformer, zero-sequence current transformer and zero-sequence voltage sensor
◆ Intelligent feeder terminal (box type or hood type), built-in supporting power supply (battery or super capacitor), built-in line loss module (optional)
◆ Power voltage transformer (1 or 2 single-phase)
◆ Standard aerial plug and cable and installation accessories

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Scope
It can be applied to the main line segment line, branch line dividing line and connecting line in my country's intelligent distribution network respectively.
Key Features
◆ SF6 arc-extinguishing structure, reliable for breaking short-circuit faults
◆ The distance between the ports is greater than 35mm, no external isolation knife switch is required, the isolation port has reliable insulation and strong anti-lightning impact ability
◆ One-step forming design of stainless steel shell is adopted to avoid stress deformation caused by secondary welding of finished products
◆ Large creepage distance and 250mm large phase-to-phase distance design, strong insulation ability, suitable for high altitude areas
◆ Quickly detect, discriminate and remove short-circuit current faults
◆ Remote control, telemetry, remote signaling, remote adjustment functions
◆ High-precision fault recording function
◆ Single-phase ground fault detection function
◆ Line damage detection and lean calculation
◆ Centralized and local feeder automation functions
◆ Strong electromagnetic compatibility and harsh environment adaptability

Main technical parameters

Serial number	Name		Units	Parameter value
1	SF6 circuit breaker
1.1	Model			LW-12
1.2	Structure			Total box type
1.3	Arc extinguishing method			SF6
1.4	Insulating medium			SF6
1.5	Rated voltage		kV	12
1.6	Rated current		A	630
1.7	Rated power frequency 1min withstand voltage	Relatively/Alternately	kV	42
		Interface	kV	48
1.8	Rated lightning impulse withstand voltage (1.2∕50ms) peak value	Relatively/Alternately	kV	75
		Interface	kV	85
1.9	Rated short-time withstand current and duration		kA/s	20/4
1.10	Rated peak withstand current		kA	50
1.11	Rated short-circuit breaking current		kA	20
1.12	Rated short-circuit making current		kA	50
1.13	Mechanical stability		times	≥10000
1.14	Annual leakage rate of SF6 gas		%	≤0.05%
1.15	Fracture distance		mm	≥35
1.16	Different periods of opening and closing		ms	≤2
1.17	Protection level of switch housing			Not lower than IP67
1.18	Switch life		Year	Not less than 20 years
2	Operating Organization
2.1	Type or model of operating mechanism			Spring
2.2	How to operate			Electric, with manual operation function
2.3	Motor voltage		V	DC24
3	Current transformers(built-in)
3.1	Rated current ratio			Phase current: 600A/5A or 600A/1A Zero sequence current: 20A/1A
3.2	Accuracy		Grade	Phase current: protection level 5P10, measurement level 0.5 Zero-sequence current: When the primary side input current is 1A to rated current, the relative error is ≤3%, when the primary current input is 100A, the protection relative error is ≤10%
3.3	Capacity		VA	Phase CT: ≥10VA at rated 5A, ≥1VA at rated 1A; Zero sequence CT: 0.5VA
3.4	Temperature range		℃	-40℃~70℃
4	Zero-sequence voltage sensor (built-in)
4.1	Ratio			(10kV/√3)/(6.5V/3)
4.2	Accuracy		Grade	3P
4.3	Partial discharge		pC	≤20（1.2Um/√3）
4.4	Insulation resistance after combination with switch (switch to ground)		MΩ	＞1000
5	Mains voltage transformer (external)
5.1	Quantity		Only	1 or 2
5.2	Rated voltage ratio			Line voltage measurement: 10kV/0.1kV Supply voltage: ?10kV/0.22 kV
5.3	Accuracy		Grade	Phase voltage: level 0.5; supply voltage: level 3
5.4	Temperature range		℃	-40℃~70℃
5.5	Partial discharge		pC	≤20（1.2Um/√3）
5.6	Measure winding output capacity		VA	≥10VA
5.7	Power winding output capacity		VA	≥300VA, short-term capacity≥500VA/1s
6	Feeder Terminal (FTU)
6.1	Voltage input nominal value		V	Line Voltage: 100 Zero Sequence: 6.5
6.2	Current input nominal value		A	Phase current: 5A or 1A Zero sequence current: 1A
6.3	Working power		V	AC220V, single or dual
6.4	Switch measurement and control capacity			Telemetry: Collect 2 line voltages, collect three-phase current, zero-sequence current, and zero-sequence voltage Remote signaling: no less than 3, including remote signaling such as switch closed position and no energy storage, handle position, etc.; Remote control: 1 way (closing, opening).
6.5	Voltage measurement accuracy		Grade	Phase voltage: ≤0.5% (0.5 class) Zero sequence voltage: ≤0.5% (0.5 level)
6.6	Current measurement accuracy		Grade	Phase measurement class 0.5 (≤1.2In), Phase protection value ≤3%(≤10In), Zero sequence current class 0.5
6.7	Accuracy of active power and reactive power			≤1% (Level 1)
6.8	Wireless Communication Module	Communication system		Support 4G/3G/2G five-mode self-adaptation, including: (TD-LTE/FDD-LTE/TD-SCDMA/WCDMA/GPRS)
	block	Communication interface		At least 2 RS232 serial ports, 9600bit/s; or 1 10/100M full-duplex Ethernet port.
6.9	Line loss module (optional)	Standard reference voltage	V	3×100V
		Standard reference current	A	1A, 5A
		Active energy accuracy	Grade	0.5S
		Reactive energy accuracy	Grade	2
6.10	Backup mode (optional)			A: Maintenance-free VRLA battery The rated voltage is DC24V, the single battery is not less than 7Ah, the service life is >3 years, and it is guaranteed to complete the "open-close-open" operation and keep the power distribution terminal and communication module running for at least 4 hours.
				B: Supercapacitor The opening operation should be guaranteed once, and the power distribution terminal and communication module should be kept running for at least 15 minutes, and the service life of the super capacitor should be >6 years.
6.11	Structure			Box or hood
6.12	Protection level			Not lower than IP67
6.13	Ambient temperature		℃	－40℃～＋70℃
7	One and two fusion sets
7.1	Fault trip			Realize single-phase grounding and phase-to-phase short-circuit fault processing, and can directly trip to remove faults.
7.2	Fault Clearance Time			The whole group action time of phase-to-phase fault is not more than 100ms
7.3	Feeder automation			Support centralized feeder automation

Dimensions

Professional test report of primary and secondary fusion complete sets of circuit breakers