LW36-55
Key features include strong short-circuit breaking capacity, low operating power, high mechanical stability, and long service life. Suitable for power transmission, distribution networks, substations, industrial power supply, and urban/rural power grid renovation.
It operates reliably in harsh environments, meeting IEC standards for power system control, protection, and fault current interruption.
Product Details
LW36-55
Outdoor high voltage AC SF6 circuit breaker
□ Meaning of type
□Introduction
□The LW36-55/3150-31.5 self-extinction AC circuit breaker which is outdoortype finds its universal range of aplicationsforthe aloctrical system with elevation not greater than2000m,ambient temperature not lower than-30℃,ditiness grade not higher than IV,alternating curent 50Hzand the nominal voltage 55KV.Itis used forcuting the rated current,malfunction current or switching the circuitry,to control and protect the electrical system,andit can also be used for connecting with the circuit breaker.
□The gas of the SF6 is employed as the arc-extinguishing medium and the dielectric material.The self-extinction technology and the new-type spring operating mechanism are introduced in the SF6circuit breaker.Thus the circui breaker has good qualities with longelectrical life,low operation power, lower noise,high reliability,simple structure,small and long overhaul periods.It is the main equipment for controlling and protecting the electro cicuit in railway substation.
□This product can be designed to share the bracket with transformers.
□Characteristic of structure
□The breaker introduces the thre-phase porcelain-pole with single interupter structure.A spring operating mechanism is supliad and the mechanical action of the three-phase is nner connected.The gas of the SF6 is connected in the three-phase pole parts.A density controller with temperature compensation is used to monito the gas of the SF6.Because of the self-extinction arc control principle and optimized design,itimproves theficiency of mechanism and reduces the operating power.
□Excellent breaking performance and long electrical life.
□The metal frame and the support of the circuit breaker are bended with a whole deep steel plate.The hot galvanizing is used fo the surface treatments The high strength stainless steol and aluminum are used for the fasteners and the three-phase transmission shaf respectively.The surface of structura boxis made by stainless steel;the corrosion resistance of the mechanism is improved efficiently.
□High mechanism realiability and can be operated frequently.
□Because of the high insulation intensity and excellent contact movement,the breaking capacity current will not be re-burn.
□The circuit breakerhas high outerinsulation level and excellent perfomance of resisting thefith,itis also can be operated safely underthe environment with atrocious weather.
□This product can be designed to share the bracket with transformers.The appearance o the breaker is compact,and the installation and dobugging is very easy.The maintenance is also very convenient.
□Technical data
1)Main technical data of breaker
|
No. |
Name |
Unit |
Value |
||
|
1 |
Rated voltage |
|
55 |
||
|
2 |
Rated power frequency withstand voltage(1min) |
To earth |
kV |
K ·140 |
|
|
Between interrupter |
K ·140 |
||||
|
3 |
Rated thunder impulse withstand voltage |
To earth |
K ·325 |
||
|
Betwoen interrupter |
K ·325 |
||||
|
4 |
Power frequency withstand voltage under zero gauge pressure ofSF6(5 min) |
K ·84 |
|||
|
5 |
Rated frequency |
Hz |
50 |
||
|
6 |
Rated current |
A |
3150 |
||
|
7 |
Amplitude factor |
|
1.5 |
||
|
8 |
Rated short-circuit breaking current |
|
31.5 |
||
|
9 |
Rated short-circuit making curent(peak) |
kA |
80 |
||
|
10 |
Rated short-circuit with stand current |
31.5 |
|||
|
11 |
Rated peak value withstand current |
80 |
|||
|
12 |
Rated short-circuit duration |
S |
4 |
||
|
13 |
Rated oul-of-phase breaking current |
kA |
8 |
||
|
14 |
Breaking curento close-in fault |
kA |
90%lk,75%lk |
||
|
15 |
Rated line-charging breaking current |
A |
10 |
||
|
16 |
Operating sequence |
|
0-0.3s-CO-180s-CO |
||
|
17 |
Resistance ofthe main circuit |
μQ |
≤40 |
||
|
18 |
Rated gauge pressure of SF6(20℃) |
Mpa |
0.5 |
||
|
19 |
Minimum functional gauge pressure(20℃) |
Mpa |
0.45±0.03 |
||
|
20 |
Annual leakage rate of SF6 |
|
<0.5% |
||
|
21 |
Amount of water of SF6(VV) |
|
≤150×10-8 |
||
|
22 |
Mechanical ife |
Times |
10000 |
||
|
23 |
Electrical level of radiointorfereance |
μV |
≤500 |
||
|
24 |
Creepage distance |
Between interrupter |
mm |
>1800 |
|
|
To earth |
>1800 |
||||
|
25 |
Eachfilledwith SF6 gas weight |
kg |
6 |
||
|
26 |
Weight per breaker |
kg |
000/2000（with transformer) |
||
Note:external insulation level is changed by modified coficient.Every 2000m of altiude,K=1.13:Altitude 3000m,K=1.28.
2)Main technical data of structure
|
No. |
N a m e |
Unit |
Value |
|
|
1 |
Ausxilary cireuit voltage |
V |
DC220 or DC110 |
|
|
2 |
Thevoltage/curent of the opening and closing coile |
VIA |
DC110/4;DC220/2 |
|
|
3 |
Energy storage motor |
Rated voltage |
V |
DC220、AC220/DC110、AC110 |
|
|
|
The range of normal working voltage |
V |
85%～110% |
|
|
|
Power |
W |
600 |
|
4 |
The energy storage time of motor |
s |
≤15 |
|
|
5 |
The loop voltage of the heater and the lamp |
V |
AC220 |
|
|
6 |
Rated voltage of the auxilary switch |
V |
DC220、AC220/DC110、AC110 |
|
|
7 |
Rated current of the auxiliary switch |
A |
10 |
|
|
8 |
Contacts of the auxiliary switches |
|
10 normal opened contacts and 10 normal closed contacts |
|
3)Mechnical adjustment of the breaker
No.
N a m e
Unit
Value
1
Center distance between poles
mm
1500
2
Strode length of the moving contact
mm
120+3
3
Contact stroke length of the moving contact
mm
25+2
4
)Langth of th inter phase oparating connecting rod
mm
110+8
5
Switch-off speed
m/s
4.2-5m/s
6
Switch-on speed
m/s
2.2-3m/s
7
Swltch-off tlme
ms
≤40
8
Switch-on time
ms
≤100
9
Break time
ms
≤60
10
Switch-on/off time
mS
≤80
11
Switch-off/on time
ms-
300
12
The time difference of the opening of three phases
ms me-
≤2
13
The time difference of the closing of three phases
≤3
口Order notice
□The type and the speclflcatlon of the clrcult breaker.
□Rated electric parameter(voltage,current,rated short-circuit breaking current and so on).
□Environmental condition(temperature,altitude,filth level and so on).
□ Rated alectric parameter of control loop(rated voltage of enargy storage motor,rated voltage of the opening and closing coils).
□The name and the number of the accessories when required.
□The connectlon dlrectlon of the primary upper terminal.
口Outline dimension
□ As per the drawing below.
□ LW36-55 circuit breaker Weight:1000kg/2000kg(with transformer).
□Front face area:4.7m²
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