Place of Origin : 
Post Date : 22-09-2021
Expiry Date : 29-10-2024

Breaker Switch Unit With Encapsulated Vacuum Interrupter

Each Vacuum Interrupter Is Embedded In A Solid-insulated Pole Made Of Weather-proof Cyclo Aliphatic Epoxy Resin. This Enables A Small Design As Well As Resistance Against Environmental Effects. The Breaker Switch Unit Is Comprised Of Three Poles, The Operating Mechanism, And The Operating Mechanism Housing.

The Sequence Of The Poles Is A -B €“ C Or 1 €“ 2 - 3 (sequence Left To Right When Viewed From The Lower Terminal Side Of The Recloser Switch Unit.

Breaker Principle And Design Of 36KV Vacuum Circuit Breaker

ZW32 Series Breakers Are Used In Distribution Systems. Circuit Breakers Are Used To Make And Break Normal And Fault Currents. Breakers Are Fully Equipped With Sensors And A Controller To Provide A Means Of Protection And Control. In Case Of A Line Fault, Breakers Can Break And Make Currents Several Times, Thus Avoiding Longer Network Interruptions Due To Temporary Faults. The Manufacture, Design, And Testing Of The Vacuum Recloser Is Based On Current Standards IEC 62271-100.

Technical Parameters Of 33KV Vacuum Circuit Breaker

Table 1-Circuit Breaker Rated Technical Data

No. Name Unit Parameter
1 Rated Voltage KV 36
2 1 Min Rated Power Frequency Withstand Voltage 70
3 Rated Lightning Impulse Withstand Voltage (peak) 170
4 Rated Current A 630
5 Rated Frequency Hz 50/60
6 Rated Short-circuit Breaking Current KA 12.5
7 Rated Short-circuit Making A Current (peak) 31.5
8 Rated Peak Withstand Current 31.5
9 Rated Short-time Withstand Current (4s) KA 12.5
10 Rated Operating Sequence O-0.3s-CO-180s-CO
11 Closing Time Ms 25-60
12 Opening Time 18-45
13 Breaking Times For Rated Short-circuit Breaking Current Times 30
14 Mechanical Life 10000
15 Secondary Circuit 1min Power Frequency Withstand Voltage V 2000
16 Charging Motor Rated Power W 40
17 Charging Motor Rated Voltage V DC24
18 Rated Closing Operation Voltage DC24
19 Rated Opening Operation Voltage DC24
20 Motor Charging Time S =12
21 Weight Circuit Breaker Kg 130
A Circuit Breaker With Dis-connector 165

Table 2 - Main Mechanical Characteristics Of Circuit Breaker
No. Name Unit Parameter
1 Contact Travel Mm 12-14
2 Contact Over-travel 2-4
3 Phase Distance (Center To Center) 410±2
4 Contact Closing Bounce Time Ms =3
5 Three-phase Open/close Synchronism =2
6 Average Opening Speed M/s 1.2-1.6
7 Average Closing Speed 0.6-1.0
8 Resistance Of The Main Circuit µO =200

Table 3 €“ Main Technical Data Of Dis-connector
No. Name Unit Parameter
1 Rated Voltage KV 36
2 Rated Current A 630
3 Frequency Hz 50/60
4 Short-time Withstand Current (4s) KA 12.5
5 Rated Peak Withstand Current 31.5
6 1min Power Frequency Withstand Voltage Across Open Contacts KV
70
7 Circuit Resistance µO =120
8 Center Deviation Value Of Three-phase Insulating Closing Mm =2
9 Synchronism Deviation Value Of Three-phase Insulator Open/close =2
10 Insulating Distance Between Conductor To Earth =300
11 Contact Travel =260


Table 4 €“ Operating Mechanism Characteristics
No. Name Unit Parameter No.
1

Opening Coil
DC24 7 Reliable Tripping Under 65%-120% Rated Voltage, No Tripping Less Than 30% Rated Voltage
DC110 5
AC220 3.5
DC220 1.8
2
Closing Coil DC24 7 Reliable Tripping Under65%-120% Rated Voltage
AC220 3.5
DC220 1.8
3 Overcurrent Tripping Coil 8
4 Energy Charging Motor Rated Voltage: DC/AC220V
Rated Power: 40W Reliable Tripping Under85%-110% Rated Voltage
5 Closing Spring Charging Time =10s

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