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LW30-72.5~252KV Outdoor SF6 Dead Tank Circuit Breaker

Home > Shop > 2）Outdoor High Voltage Electrical Equipments > LW30-72.5~252KV Outdoor SF6 Dead Tank Circuit Breaker

LW30-72.5~252KV Outdoor SF6 Dead Tank Circuit Breaker

SF6 Gas Circuit-Breaker 72.5kV up to 252KV, 25kA~63kA, 1250A~4000A for Outdoor Three phase/Single phase Substation installation .Comply with IEC/ANSI standards Provided customized manufacture Accountable solution for safety and reliability Wide range offering, easy business and convenient installation .

Email: steven@boerstn.com

Tel: 13868438199

Whatsapp: 8613868438199

LW30-72.5~252KV Outdoor SF6 Dead Tank Circuit Breaker

description1

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PRODUCT DETAILS

Dead tank type

SF6 Gas Circuit- Breaker

72.5kV up to 252KV, 25kA~63kA, 1250A~4000A for Outdoor

Three phase/Single phase

Substation installation

Comply with IEC/ANSI standards

Provided customized manufacture

Accountable solution for safety and reliability

Wide range offering, easy business and convenient installation

Main Technical Specifications

The circuit breakers are all equipped with pure spring operang mechanisms which makes structure simple and highly reliable. The mechanical endurance for the operang mechanism is over 10000 mes, and it is convenient for maintenance and meets mechanism’s requirements for oil free and air free. It uses self-energy arc-exnguishing principle, and reduces operaon power of the mechanism and enhance operaonal reliability of product.
The ﬂanges adopt dual-seal structural design, the outer seal ring is water-proof and inner seal ring is gas - proof. Therefore, it can reduce the leakage of the product greatly and makes the product more suitable for outdoor operaon.

Service environment

1. Ambient temperature: -40 C ~ +55 C.
2. Daily average ambient air relave humidity ≤ 95%, on average ≤ 90%;
3. Wind pressure: less than 700pa.
4. Altude: less than 3000m.
5. Earthquake intensity: not more than 9 degrees.
6. Air Contaminaon: Ⅲ grade

Main technical parameters (three phase)

No.	Descripon	Technical parameters
1	Rated voltage, kV	72.5	126	145	252
3	Rated frequency, Hz	50/60
4	Rated current, A	1600~400			3150~4000
	1min Power frequency withstand voltage	140 230		265	460
	Lightning impulse withstand voltage	325 550		650	1050
5	Rated short-circuit breaking current, kA	25~40			40~63
7	Rated short circuit breaking current (peak), kA	63~100			100~157.5
8	Rated short duraon, s	3	3	3	3
	Rated out-of-phase breaking current	10	10	10	10
	Rated cable(line) charging breaking current	10	31.5	50	125
	Rated gas pressure, Mpa	0.4	0.5	0.58	0.62
	Operaon sequence	O-0.3s-CO- 180s-CO
	Par alDischarge		10 pC		5 pC
	SF6 gas leakage rate (per year)	≤ 1%
14	First open pole factor	1.5	1.55	1.5	1.3
	Main loop resistance, μΩ	≤40	≤45	≤45	≤50
	Heater voltage	AC220
	Control circuit and signal circuit voltage	DC110, DC220, DC230
	Motor voltage	DC220, DC230

Note: For short circuit breaking current & rated current is oponal by clients.

Main Unit

Structure

LW Series self-energy sulfur hexafluoride circuit breaker uses the principle of self-interrupter, greatly reducing the pressure cylinder diameter and weight, reduced operating power, making equipped with spring operating mechanism to become a reality.

Three single pole circuit breaker and each of the three mounted on the spring mechanism consisting of three stents, can be either unipolar operation, and can achieve three-pole electrical linkage. Spring mechanism mounted on the side of the bracket, electrical control system is placed inside the body. The upper part of the body is a single-pole circuit breaker interrupter single fracture, the middle pillar porcelain sets, the lower part is used for sealing, opening spring and buffer.

Verification of degree of protection: IP55, IK10, wide temperature range (-40?~55?)
Adopting integrated bending technique, artistic in appearance, high in strength and sound in impermeability
The internal components adopt international famous brand, with reliable quantity.

The electromagnetic current transformer placed on the incoming and outgoing side of the circuit breaker, is located in different compartment from circuit breaker.
The external coil structure is used, which is entirely cast with inside shell; and the outside is protected by rain cover; the outside of the coil adopts special waterproof structure to reach better moisture-proof effect.
The secondary winding is cast with the saturated epoxy resin, with high electrical and mechanical strength and good heat resistance.

The circuit breaker works with the current mature self-energy technology principle. The energy required to break the short-circuit current, in part from the arc itself, reduces the energy of the operating mechanism. The circuit breaker transmission mode is three-phase mechanical linkage, which can effectively ensure the three- phase switching and synchronizing.

Figure 1 Opening position

Figure 2 Closing position

Principle

High breaking current: Self-energy principle:

The arc combustion makes SF6 gas in the thermal expansion chamber fiercely expanding to generate gas flow blowing to nozzle to the nozzle to extinguish the arc.

Low breaking current: Puff type principle:

SF6 gas in the compression chamber is compressed to generate gas flow, blowing to the nozzle to extinguish the arc, which then extinguishes.

Basic research ability