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Outdoor SF6 High Voltage Circuit Breaker AC 50Hz For Measurement And Protection

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Outdoor SF6 High Voltage Circuit Breaker AC 50Hz For Measurement And Protection

China Outdoor SF6 High Voltage Circuit Breaker AC 50Hz For Measurement And Protection supplier

Large Image :  Outdoor SF6 High Voltage Circuit Breaker AC 50Hz For Measurement And Protection

Product Details:

Place of Origin: China
Brand Name: Tianan Electric
Certification: ISO9001-2000
Model Number: LW8-40.5

Payment & Shipping Terms:

Minimum Order Quantity: 1 unit
Price: Pending
Packaging Details: Wooden Case
Delivery Time: 35 work days
Payment Terms: L/C, D/A, D/P, T/T, Western Union, MoneyGram
Supply Ability: 14000 PCS/year
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Detailed Product Description
Rated Voltage: 40.5 1min Power Frequency Withstand: 185/215(fracture)
Lightning Impulse Withstand: 95/118(fracture) Rated Current: 2000
Mechanical Endurance: 5000

Outdoor SF6 High Voltage Circuit Breaker AC 50Hz LW8-40.5

 

 

1.General


1.1 LW8-40.5 Outdoor HV SF6 circuit breaker is an outdoor HV electrical equipment of three-phase, AC, 50Hz and it's suitable for control and protection of power transmission and distribution system, it also can be used to tie circuit breaker and break/make capacitor bank, and also can attach circuit breaker in it for measurement and protection.

1.2 LW8-40.5 Outdoor HV SF6 circuit breaker adopts CT14 spring operation mechanism.

1.3 The circuit breaker meets the requirements of national standard : GB1984-89 AC High-Voltage Circuit breakers, and IEC56 AC High-Voltage Circuit breakers.

1.4 Main features of the Circuit breaker


a. Good breaking performance, short-time arcing time,
long electrical duration and with the ability of continuous breaking of 16 times under the rated voltage without change of SF6.
b. Reliable insulation, to be up to 40.5Kv/10min at gas pressure of zero point of meter.
c. High mechanical reliability, High making ability, frequent operation is available.
d. Without return while closing and opening capacitor bank of 400A.
e. Cut off long line of 25.50km and has no re-burn.
f. Simple structure, small size, long free time is no need to overhaul.

1.5. Application environment

a. Altitude to be not more than 1000m
b. Ambient temperature: -30ºC - + 40ºC, the average value of 24H to be not more than 35ºC;
c. Relative humidity: the daily average value to be not more than 95%, monthly average value to be not more than 90%,
d. Speed of wind: not more than 35km/s
e. Contamination condition to be III grade, porcelain bushing creepage distance shall be 1050 mm (nominal creepage ratio to be not less than 25mm/kV);
f. The ambient air should be free of the flammable material, explosive danger, chemical corrosive and intensive shake.

2. Main technical parameters

2.1 LW8-40.5 Circuit breaker main technical parameters to see table 1.
2.2 Assembly and adjustment parameters of circuit breaker to see table 2.

Table 1

No. Item Unit Parameter
1 Rated voltage kV 40.5
2 Rated insulation level 1min power frequency withstand voltage kV 185/215(fracture)
Lightning impulse withstand voltage 95/118(fracture)
3 Rated current A 2000
4 Mechanical endurance time 5000
5 Rated pressure of SF6 gas(20ºC meter pressure) Mpa 0.45
6 Locking pressure (20ºC meter pressure) Mpa 0.40
7 Lowest ambient temperature ºC -30
8 Rated short-circuit breaking current kA 31.5
9 Rated short-circuit making current(peak) kA 80
10 Rated short time withstand current(thermal current) kA 31.5
11 Rated peak withstand current(dynamic current) kA 80
12 Rated out-of-phase breaking current kA 7.9
13 Breaking times of the rated short-circuit breaking current: time 16
14 Close time s ≤0.1
15 Open time s ≤0.06
16 Rated operation sequence
 
O-0.3s-CO-180s-CO
17 Rated breaking/opening current of single capacitor group A 400
18 Last time of short circuit current s 4
19 SF6 leakage rate (yearly)
 
≤1
20 Moisture Content of SF6 gas(20ºC) Ppm(v/v) ≤150
21 Rated operating voltage of spring operation mechanism
 

 
Voltage of closing and opening coil V AC 220, 380
DC:48, 110 , 220
Voltage of energy storage motor V AC 220
DC 220
22 Weight of SF6 gas kg 8
23 Weight of circuit breaker (including operation mechanism) kg 1400


Table 2

No. Item Unit Technical Requirements Test conditions and methods
1 Travel of movable contact mm 95±2 Measurement of movable contact travel refer to darawing12
2 Clearance between contacts mm 605±1.5 Measurement of Clearance between movable and fixed contact refer to drawing 12a
3 Three-phase switch-on asynchrony ms ≤3 Measurement of pole distance difference between movable and fixed contact refer to darawing14
4 Three-phase switch-off asynchrony ms ≤2 Measurement of pole distance difference between movable and fixed contact refer to drawing 15
5 Resistance of main loop μΩ ≤120 Measurement to DC voltage drop method, put in 100A
6 Speed at instant of contacts touching m/s 3.2±0.2 Rated voltage and measurement method refer to drawing 14
7 Speed at instant of contacts disconnecting m/s 3.4±0.2 Rated voltage and measurement method refer to the drawing 15
8 Cuisine stroke of making mm 10+0.5 -0.1 Refer to drawing 6 under the closing status
9 positioning gap of Cuisine stroke of making mm 1-2 Refer to drawing 6 under the closing status
10 Partial charging
40.5kV
25.7kV
PC 20 At rated gas pressure, use partial instrument to put 40.5kV between two outgoing wires for 1min, then drop to 25.7kV equably
PC 10

 

 

 

Outdoor SF6 High Voltage Circuit Breaker AC 50Hz For Measurement And Protection

Contact Details
Ningbo Tianan (Group) Co.,Ltd.

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