More than 20 years of operation has proved that this 24kV indoor vacuum circuit breaker VB5 type and its series of products have quite superior advancement and reliability. VB5 vacuum circuit breaker is suitable for indoor switch system with air insulation. As long as it is within the normal operating conditions and the technical parameters of the circuit breaker, the VB5 vacuum circuit breaker can meet various operations of the power grid under normal or accident conditions, including closing and breaking short-circuit currents.
The electrical main circuit of VB5 (ZN21B) adopts the advanced epoxy resin casting process. The vacuum arc extinguishing room is sealed in the epoxy resin directly, and with a silicone rubber buffer. This process makes the conductive circuit not effect by the external environment (such as dust, moisture), and greatly improves the insulation level of vacuum arcing room. reduces the insulation distance between phases of vacuum circuit breaker, reduces the volume of vacuum circuit breaker, and maintenance free.
|
NO.
|
Item
|
Unit
|
Data
|
|
1
|
Rated Voltage
|
kV
|
24
|
|
2
|
Rated short-time power frequency withstand voltage ( 1min)
|
kV
|
42( phase to phase,to earth) / 48( open - 180S - close open - 180S - close open）
|
|
3
|
Rated lightning(1 min) impulse withstand voltage(peak)
|
kV
|
75( phase to phase,to earth) / 85( open - 180S - close open - 180S - close open）
|
|
4
|
Rated
frequency
|
Hz
|
50/60
|
|
5
|
Rated
current
|
A
|
630、1250
|
630、 1250、 1600、
2000、 2500、 3150
|
1250、 1600、 2000、
2500、 3150、 4000
|
|
6
|
Rated
short-circuit breaking current
|
kA
|
20
|
25
|
31.
5
|
40
|
|
7
|
Rated
short-time withstand current( 4s)
|
kA
|
20
|
25
|
31.
5
|
40
|
|
8
|
Rated
peak withstand current
|
kA
|
50
|
63
|
80
|
100
|
|
9
|
Rated short-circuit making current
|
kA
|
50
|
63
|
80
|
100
|
|
10
|
Rated
short-circuit breaking current(different directions)
|
kA
|
17.
3
|
21.
7
|
27.
3
|
34.
6
|
|
11
|
Rated
operation order
|
|
open - 0.3S - close open- 180S - close open
|
open - 180S - close open - 180S - close open
|
|
12
|
Opening
time（rated voltage）
|
ms
|
30-60
|
|
13
|
Closing
time（rated voltage）
|
ms
|
25-55
|
|
14
|
Rated
output power of the energy storage motor
|
W
|
100
|
|
15
|
Breaking
times under rated short-circuit current
( E2 grade）
|
times
|
30
|
|
16
|
Rated
voltage of energy storage motor
|
V
|
AC/ DC220 、AC/ DC110
|
|
17
|
Rated
close operating voltage/current
|
V/A
|
AC/ DC220/ 1 、110/ 2
|
|
18
|
Rated
open operating voltage/current
|
V/A
|
AC/ DC220/ 1 、110/ 2
|
|
19
|
Rated
instantaneous overcurrent tripping action current
|
A
|
5
|
|
20
|
Rated
voltage of the voltage loss trip
|
V
|
AC220、AC110
|
|
21
|
Rated
on-off current of auxiliary switch
|
A
|
16
|
|
22
|
Energy
storage time (in rated voltage)
|
s
|
<7
|
|
23
|
Secondary
circuit (1 min) power frequency withstand voltage
|
V
|
2000
|
|
24
|
Main
circuit resistance(without plum blossom contact)
|
μΩ
|
≤ 45(630
~800A) 、≤ 35(1250A) 、≤30(1600-2000A) 、
≤25(2500A) ≤
20(3150A and above）
|
|
25
|
Rated
breaking current of capacitor bank
( C2 grade）
|
A
|
single fuse 800、back to back fuse 400
|
|
26
|
Distance
between contacts
|
mm
|
9±1
|
|
27
|
Contact stroke
|
mm
|
3±1
|
|
28
|
Average
closing speed
|
m/
s
|
0. 5~0. 9
|
|
29
|
Average
opening speed
|
m/
s
|
1- 1. 7
|
|
30
|
Three
- phase contactor opening and closing simultaneity
|
ms
|
≤1
|
|
31
|
Contactor
closing bounce time
|
ms
|
<2
|
|
32
|
Mechanical
life(M2 grade)
|
times
|
20000
|
|
33
|
Moving
and static contactor allows accumulated wear thickness
|
mm
|
3
|
1. Altitude: ≤1000m.
2. Surrounding air temperature: upper
limit +40 ° C, lower limit -25 ° C (alpine region) and -1 ° C (general region).
3. Relative humidity of surrounding air:
when the maximum temperature is +40℃,
it is not more than 50%. When the temperature is low, it is allowed to have a
large relative humidity. Due to the change of temperature, it may occasionally
has condensation effect.
4. Outdoor wind speed shall not exceed
34m/s.
5. The slope of the ground shall not
exceed 3°.
6. The horizontal acceleration of the
earthquake shall not more than 0.4m/s, and the vertical acceleration shall not morn
than 0.2m/s;
7. The installation site shall be free
from fire, explosion, serious pollution, chemical corrosion and violent
vibration.
Note: if the actual conditions of use
cannot be met, please negotiation with the manufacturer.
Q: Are you the manufacturer or trader?
A: We are both manufacturer & trader. We have our own manufacturer named TIANYI TONGYI ELECTRIC CO.,LTD, who have 27 years experience in electric industry. It covers an totally area of 117,000 m2 with 300 employees, also is a qualified supplier of China National Nuclear Corporation(CNNC) and main supplier for State Grid & China Southern Power Grid.
Q: What is your after-sales service?
A: We always provide free online service and technical support within 24 hours. 18 months warranty for customers.
Q: What is your delivery time?
A: Normally 25~35days. It depends on the order quantity and season. We have very strong capacity to produce top quality products, please inquiry us if you have any questions.
Q: What is the quality warranty time?
A: We have quality certificate CCC, CQC, ISO9001, CE ... Meanwhile, we can provide 18 months warranty for our products. Free online service and technical support within 24 hours is always provided to our customers.
Q: Do you accept ODM and OEM?
A: Yes. We have professional R & D teams to update and develop the latest technology. We also can support ODM or OEM, please send us details drawing to discuss.
Q: What is your payment terms?
A: Generally there are two payment terms:
a) 30% advance payment via T/T as a deposit, balance 70% against the shipping documents
b) Irrevocable L/C at sight
Q: If I want to visit you, how to go?
A: Our factory is located in Luoyuan County, Fuzhou City. Details address is Songshan Area, Taiwan Investment Zone, Luoyuan County, Fuzhou City, Fujian Province,China.
a) The nearest airport is Fuzhou Airport, if you come by air, please arrive in Fuzhou Airport, it takes 1 hour from the airport to our factory
b) The nearest train station is Luoyuan Station, if you come by train, please arrive in Luoyuan Station, it takes only 5 minutes to our factory.
Anyway, please contact us in advance, we will send the car to the airport or train station to pick you up.Sincerely welcome you to come and visit us.
Q: Do you need agents?
A: Yes, we welcome you to be a partner. Welcome to contact us for more information.
