Dead Tank SF6 Circuit Breaker

NegotiableUpdate on October 02

Model

Nature of the Manufacturer: Other

Product Category: The Outdoor Switchgear

Place of Origin: City, Province

Online Consult Contact Information

Overview

Dead tank type SF6 Gas Circuit-Breaker.72.5kV up to 252KV, 25kA~63kA, 1250A~4000A for Outdoor. Comply with IEC/ANSI standards

Product Details

The dead tank SF6 circuit breakers are all equipped with pure spring operating mechanisms which makes structure simple and highly reliable. The mechanical endurance for the operating mechanism is over 10000 times, and it is convenient for maintenance and meets mechanism’s requirements for oil free and air free. It uses self-energy arc-extinguishing principle, and reduces operation power of the mechanism and enhance operational 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 operation.

Service environment

• Ambient temperature: -40 ℃ ~ +55 ℃.

• Daily average ambient air relative humidity ≤ 95%, on average ≤ 90%;

• Wind pressure: less than 700pa.

• Altitude: less than 3000m.

• Earthquake intensity: not more than 9 degrees.

• Air Contamination: Ⅲ grade.

Principle

1. 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.

2. 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.

Field service operation and warranty issues

ROCKWILL can provide competent, well trained field service representatives to provide technical guidance and advisory assistance for the installation, overhaul, repair and maintenance of ROCKWILL® equipment, processes and systems.

No.	Description	Technical parameters
1	Rated voltage, kV	72.5	123	145	245
2	Rated frequency, Hz	50/60
3	Rated current, A	1600~4000			3150~4000
4	1min Power frequency withstａnd voltage	140	185/230	230/275	360/395/460
5	Lightning impulse withstａnd voltage	325	450/550	550/650	850/950/1050
6	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 duration, s	3	3	3	3
9	Rated out-of-phase breaking current	10	10	10	10
10	Rated cable(line) charging breaking current	10	31.5	50	125
11	Rated gas pressure, Mpa	0.4	0.5	0.58	0.62
12	Operation sequence	O-0.3s-CO-180s-CO
13	Partial Discharge	10 pC	10 pC	10 pC	5 pC
14	SF6 gas leakage rate (per year)	≤1%
15	First open pole factor	1.5	1.55	1.5	1.3
16	Main loop resistance, μΩ	≤40	≤45	≤45	≤50
17	Heater voltage	AC220
18	Control circuit and signal circuit voltage	DC110, DC220, DC230
19	Motor voltage	DC110, DC220, DC230

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

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.

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.

opening postion of dead tank SF6 circuit breaker

Opening position

closing postion of dead tank SF6 circuit breaker

Closing position