ZN23-40.5 Indoor handcart type HV Vacuum Circuit Breaker
Product Description
ZN23-40.5 vacuum circuit breaker of ultra-long life is an indoor three-phase AC high- voltage electricequipment of rated voltage 40.5kV and 50Hz. It is suitable for controlling and protecting the powertransmission and distribution system in industrial and mining enterprise and transformer substation,etc; especially, it is applicable for the industries like metallurgy, arc steelmaking that needs the frequentoperation, serving as a control and protection device. This vacuum circuit breaker is of handcart type, withreasonable structure, simple maintenance and safe and reliable operation. It can be modified as required, such asPT handcart, PT with lightning arrester, handcart transformer, handcart, isolation handcart, etc.
This product conforms to the standard of GB1984-89 Alternating Current High- voltage Circuit Breaker
Item
unit
parameter
Rated voltage
kV
40.5
Rated lightning impulse withstand voltage
kV
185
1 min line frequency withstand voltage
kV
95
Rated frequency
Hz
50
Rated current
A
1250,1600,2000
Rated short circuit dropout current
kA
25,31.5
Rated short time withstand current
kA
25,31.5
Rated peak withstand current
kA
63,80
Rated short circuit duration
s
4
Rated short circuit dropout time
ms
≈90
Rated short circuit close time
kA
80
Rated operating sequence
O-0.3s-CO-180s-CO
Close time
ms
50~85
Break time
ms
40~85
Open circuit times of rated short circuit dropout current
times
20
Mechanical life
times
12000
Rated breaking current of capacitor bank
A
630
Rated power of energy storage
W
275
Rated voltage of energy storage
V
AC/DC220.110
Energy storage time
S
15
Rated voltage of closing and opening electromagnet
