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General
ZN63S-24(VSI+)indoor high voltage AC vacuum circuit breaker is a kind of indoor switchgear of electric system of 24KV.It is used as protection and control element in electric wire netting system,power equipment of industrial and mineral enterprises,Because of special advantage,vacuum circuit breaker can operate frequently or place of multi-breaking short circuit.
Vancuum circuit breaker adopts the design of integrating the operating mechanism with the breaker,available for serving as permanently installed unit,or as hand-trolley unit after equipped with underframe.
The breaker conforms to the national standards of GB1984-2003"High Voltage AC Circuit Breaker",DL/T403-2000"Technical Conditions for Ordering AC High voltage vacuum circuit breaker",DL/T403-2000"Technical Conditions for ordering 12-40.5KV High voltage vacuum circuit breaker",IEC62271:100"High voltage AC circuit breaker"and through the pattems test of quality supervision and inspection center of high voltage electrical equipments.
Type & Meaning
Normal use condition
a.Ambient temperature
Maximum:+40oC
Minimum:-15oC
b.Ambient temperature
Daily average relative humidity:≤95%
Monthly average relative humidity:≤90%
Daily average saturated vapor pressure:≤2.2×KPa
Monthly average saturated vapor pressure:≤1.8×KPa
c.Altitude:not exceeding 1000m
d.Used in the places free from any fire,explosion danger,severe pollution,chemical corrosion and intense vibration.
e.Vibration of switchgear external or land and can be ignored.
Technical Data Table 1 Main technical parameters
| No. |
Item |
Unit |
Value |
| 1 |
Rated voltage |
KV |
24 |
| 2 |
Rated insulation level |
1min power frequency withstand voltage |
KV |
65 |
| Lighting impact withstand voltage(peak value) |
125 |
| 3 |
Rated frequency |
HZ |
50/60 |
| 4 |
Rated current |
A |
630,1000,1250,1600,2000,2500 |
| 5 |
Rated short circuit breaking current |
KA |
20 |
25 |
31.5 |
| 6 |
Rated short circuit making current(peak value) |
KA |
50 |
63 |
80 |
| 7 |
Rated short time withstand current |
KA |
20 |
25 |
31.5 |
| 8 |
Rated peak time withstand current |
KA |
50 |
63 |
80 |
| 9 |
Rated short circuit lasting time |
s |
4 |
| 10 |
Rated operating sequence |
|
O-0.3s-CO-180s-CO O-180s-CO-180s-CO |
| 11 |
Rated charge current of breaking/making cable |
A |
31.5 |
| 12 |
Breaking time rated short circuit current |
Time |
50 |
| 13 |
Breaking time |
ms |
≤80 |
| 14 |
Mechanical life |
Time |
20000(M2 grade) |
| 15 |
Classify according to electricity life |
|
E2 grade |
| 16 |
Classify according to capacitance |
|
C2 grade |
| 17 |
Accumulated permitted wearing thickness of moving and static contact-head |
mm |
3 |
Table 2 mechanical feature parameter
| No. |
Item |
Unit |
Value |
| 1 |
Open distance between contact-head |
mm |
14±1 |
| 2 |
Over travel |
mm |
3.5±1 |
| 3 |
Average switch-on speed |
m/s |
1.0±0.2 |
| 4 |
Average switch-off speed |
m/s |
1.3±0.2 |
| 5 |
Switch-on time |
ms |
35~70 |
| 6 |
Switch-off time |
ms |
20~50 |
| 7 |
Contact-head switch-on bounce time |
ms |
≤2 |
| 8 |
Different time of switch-on/off of 3 phase |
ms |
≤2 |
| 9 |
Each phase electric loop resistance |
μΩ |
≤50(630A)≤45(1250A)≤35(1600~2000A) |
| 10 |
Center distance of phase |
mm |
210 |
| 11 |
Contact-head pressure |
N |
2400±200(20KA,25KA)3100±200(34.5KA) |
| 12 |
Anti-rebound value of contact-head |
mm |
≤2.5 |
Table 3 operation tecnical parameter
| No. |
Item |
Unit |
Value |
| 1 |
Rated operation voltage |
Switch-on winding |
V |
AC110,AC220,
DC110,DC220 |
| Switch-off winding |
| 2 |
Working current |
Switch-on winding |
A |
AC220/DC220:1.1
AC110/DC110:3.3 |
| Switch-off winding |
| 3 |
Energy storage motor power |
W |
70 |
| 4 |
Rated voltage of energy storage motor |
V |
DC:220/DC:110 |
| 5 |
Energy storage time |
s |
≤10 |
Structure of Products and Working Principle
1.General Structure of Breaker
Main parts of circuit breaker are installed in a tubular insulated cylinder,which is cast of epoxy resin with APG technology,as a result,it can effective prevent impacts to vacuum interrupter from extemal factors such as external shocks,filthy environment.Mains of circuit current path of main circuit on switch-on position of the breaker;
2.Operating mechanism
Operating mechanism is spring energy storage operating mechanism.There have a switch-on module in framework of circuit breaker,switch-off module composed by one or several of electromagnetic iron,secondary switch,installation instruction,direction Release electromagnet formed the sub-modules Gates,auxiliary switch,installation instructions and other components.front cooperation with sub-button operation manual storage holes spring energy state signs signs. |
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