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Short circuit protection vcb vacuum circuit breaker

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Short circuit protection vcb vacuum circuit breaker
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Features
Specifications
Model Number: ZN63A-12(VS1-12)
Breaking Capacity: 25KA
Rated Voltage: 12KV 24KV 36KV
Rated Current: 1600A
Rated Voltage: 12 KV
Rated Current: 1600A
Rated Frequency: 50Hz
Certificate: CE IEC ISO CQC CCC
Product Name: High Voltage Vacuum Circuit Breaker
The Breaking Current: 20-50KA
The Operating Voltage: AC DC 24 48 110 220V
Application: Short-circuit Protection
Installation: Stationary Handcart Type
Type: Vacuum
Basic Infomation
Certification: CE IEC ISO CQC CCC
Model Number: ZN63A-12(VS1-12)
Payment & Shipping Terms
Packaging Details: Packing in standard export wooden cases
Supply Ability: 10000 Piece/Pieces per Year
Product Description
Product Description
ZN63A(VS1)-12 CIRCUIT BREAKER
1.1 Suitable for three-phase AC, 50Hz, rated voltage of 12kV power system;
1.2 Can be used as a protection and control unit for industrial and mining enterprises and substation equipment;
1.3 Can be used for KYN28-12 and other central switch cabinets and fixed switch cabinets;
1.4 The main circuit of the circuit breaker can be used in two ways: insulated cylinder and solid sealed pole.
1.5 Executive standards:
GB1984 "High Voltage AC Circuit Breaker"
JB/T3855 "High Voltage AC Vacuum Circuit Breaker"
DL/T403 "Technical conditions for ordering 12kV-40.5 kV high voltage vacuum circuit breakers"
IEC62271-100 "High-voltage switchgear and control equipment-Part 100: AC circuit breakers"

2. Normal use environment
3. Place of use: Indoor
4. Ambient temperature: -15℃~40℃
5. Altitude: not more than 1000m
6. Daily relative humidity (average): not more than 95%
7. Daily water vapor pressure (average value): not more than 2.2kPa
8. Monthly relative humidity (average): not more than 90%
9. Monthly water vapor pressure (average value): not more than 1.8kPa


Note: 1. The surrounding air is not obviously polluted by dust, smoke, corrosive or flammable gas, steam or salt mist;
2. Exceed the normal conditions of use, please consult with the manufacturer.
NO.
Name
unit
DATA
1
Rated voltage
KV
12
2
1 min power frequency withstand voltage (effective value) (interphase, ground, fracture)
KV
42
Lightning impulse withstand voltage (peak value) (interphase, ground, fracture)
75
3
Rated current
A
630、1250、1600
4
Rated short-circuit breaking current
KA
20 25 31.5
5
Rated short circuit and current (peak value)
KA
50 63 80
6
Rated dynamic stable current (peak value)
KA
50 63 80
7
Rated thermal stability current
KA
20 25 31.5
8
Rated thermal stability time
S
4
9
Rated short-circuit current breaking times
times
30
10
Mechanical life
times
30000
11
Rated operating sequence
O-0.3S-CO-180S-CO
12
Single capacitor breaking capacity
A
630
13
Back-to-back capacitor bank breaking capacity
A
400
14
Contact opening
mm
11±1
15
Contact stroke
mm
3.5 ±0.5
16
Three-phase opening synchronization
ms
<=2
17
Bounce time of closing contact
ms
<=2
18
Buffer stroke
mm
10
19
Center distance
mm
210 250 275
20
Average opening speed
m/s
0.9-1.2
21
Average closing speed
m/s
0.5-0.8
22
Conductive loop resistance
u 0
<=50 630A
<=45 1250A
<=35 1600A
23
Accumulative allowable wear thickness of dynamic and static contacts
mm
<=3
ZN88A-12 series solid vacuum circuit breaker (hereinafter referred to as circuit breaker) is a three-phase indoor switchgear of AC 50Hz and rated voltage of 12 kV, used to control and protect the electric devices in industrial and mining enterprises, power plants, transformer substations, meanwhile, it can be used for the locations where requires frequent operation.
* Accordance with GB1984-2014 < High-voltage alternating current circuit breakers >
* Accordance with JB3855-1996 < Indoor high-voltage alternating-current vacuum circuit breaker of 3.6-40.5kV >
* Accordance with DL403-91
* Conformity with relevant requirements of IEC62271-100
* Due to its integrated design of operating mechanism and body of circuit breaker, this circuit breaker not only can be us.

ZN88A-12 uses a mature spring operating mechanism, stable, reliable, long life, simple operation, excellent corrosion
resistance, life expectancy is only minimal maintenance

* ZN88A-12solid sealing pole of the use of environmentally friendly high strength insulation material, with an altitude of 2000 meters above sea level, a unique contact material and a plum blossom contact application, so that the ZN88A-12 sealed vacuum circuit breaker is suitable for medium pressure system of various occasions.

* All products have been tested in hundreds of times before the factory, to ensure the performance of the product is in the most stable state.

* The shape size and the type of the interlocking system are fully compatible with the domestic mainstream medium voltage switchgear KYN28 cabinet, and the design cost is greatly reduced.

* The use of advanced imported test equipment, the real record of the no-load mechanical characteristics of each product, and to provide users with these characteristics curve, to ensure the reliability of product quality.

* According to extend the GB1984-2014 electrical life of E2 level and prolong the life of machine m2 and volume of current switching has very low restrike probability C2 type test.

* Product assembly use fixture ensure size consistency, all products in the factory have been standard cabinet push test cabinet, to ensure the product interchangeability and versatility.

specification data
Main technical parameters
The Project Name
unit
parameter
Rated Voltage
kv
12
Rated Short-Time Working Frequency Withstand Voltage(1 Min)
kv
42
Rated Lightning Shock Withstand Voltage(Peak)
kv
75
Rated Frequency
Hz
50
Rated Current
A
630 1250
1600.2000.2500. 3150.4000.5000
Rated Short Circuit Breaking Current
KA
25
31.5
40
Rated Short Time Withstand Current
KA
25
31.5
40
Rated Short Circuit Duration
S
4
4
4
Rated Peak Withstand Current
KA
63
80
100
Rated Short Circuit Closing Current
KA
63
80
100
Secondary Circuit Power Frequency Withstand Voltage(1Min)
V
2000
Rated Single/Back-To-Back Capacitor Bank Seitchgear On And Off Current
A
630/400(40KA is 800/400)
Rated Capacitor Bank Closing Current
KA
12.5(frequency≤1000Hz)
Break-Brake Time
ms
≤50
Closing Time
ms
≤70
Mechanical Life
use number
30000
Electrical Life
use number
GB1984-2003
Wear Thickness Of Dynamic And Static Contacts Is Allowed
mm
3
Rated Closing Operating Voltage
V
AC110/220 DC110/220
Rated Tripping Operating Voltage
V
AC110/220 DC110/220
Rated Voltage Of Energy Storage Motor
V
AC110/220 DC110/220
Rated Power Of Energy Storage Motor
W
90
Energy Storge Time
S
≤15
Contact From
mm
9±1
Over Travel
mm
3.5±0.5
Contact Closing Bounce Time
ms
≤2
Three-Phase Separation And Closing Are Not Of The Same Period
ms
≤2
Average Breaking Speed(Contact Separatio-5Mm)
m/s
0.9--1.3
Average Closing Speed(5Mm--Contact Closing)
m/s
0.6--1.0
Break-Brake Overshoot
mm
≤2
Main Circuit Resistance
μΩ
≤50（630）， ≤45（1000/1250） ≤35（1600/2000），≤25（2500/3150）， ≤20（4000）
Contact Closing Pressure
N
3100±200（25-31.5KA）/4600±2500（40KA）
Rated Operaing Order
O-0.3s-CO-180S-CO
ZN88C-12 indoor AC high-voltage vacuum circuit breaker (hereinafter referred to as circuit breaker) is suitable for indoor switchgear of 12KV power system, as a protection and control unit for power grid equipment, industrial and mining enterprises, power equipment. Due to the special superiority of the ZN88C-12 vacuum circuit breaker, it is especially suitable for the places where the rated operating current is frequently operated, or the short-circuit current is broken multiple times. The series withdrawable handcart functional unit is used in conjunction with vacuum circuit breakers and other electrical equipment projects. The handcart is equipped with different primary element devices, which can have the functions of busbar connection, energy measurement, overload or short circuit protection of power equipment, and as a protection function unit during system maintenance.

ZN88C-12 circuit breaker adopts standardized design, with high interchangeability, and products of the same specification can be exchanged without adjustment, which is convenient for repair and maintenance. The operating mechanism adopts a modular design, which is integrated with the short circuit body. It has a reliable and perfect mechanical and electrical anti-misoperation interlocking system to ensure the safety of operation and maintenance.

ZN88C-12 circuit breaker can be used as a fixed installation unit, or it can be equipped with a special propulsion echanism to form a handcart unit (which can be used in a fixed cabinet or a handcart cabinet). The design, manufacture and test of the circuit breaker comply with the following IEC, GB and DL standards.

ICE-60056 high voltage AC circuit breaker;
GB1984 AC high voltage circuit breaker;
DL/T403 12-40.5P internal high voltage circuit breaker order technical conditions;
GB/T11022 General technical requirements for high-voltage switchgear;

2.Environmental conditions
1. Ambient temperature: maximum temperature:+40 ~-15 degree.
2. Ambient humidity: daily average relative humidity: <=95%;
monthly average relative humidity: <=90%;
Daily average saturated vapor pressure: <=2.2 x10-3Mpa;
Monthly average saturated vapor pressure: <=1.8xl0-3Mpa;
3. Altitude is not higher than 1000m;
4. The seismic intensity does not exceed 8 degrees;
5. There is no dripping water, no flammable and explosion hazards, no chemical corrosive gas and no violent vibration; if the environmental conditions of the product use exceed the above regulations. Users can negotiate with our company to determine.

3.Circuit breaker structure and working principle
3.1 Main structure
The circuit breaker arranges the main circuit and the operating mechanism back and forth to form an overall layout. This
structural design can make the operating performance of the operating mechanism more consistent with the performance required for opening and closing the arc extinguishing chamber, and reduce unnecessary intermediate transmission links. Reduced energy consumption and early noise, reliable electrical and mechanical interlocking, making the operation performance of the circuit breaker more reliable, users can directly put into operation without adjustment.

3.2 Main circuit structure
The main circuit of the circuit breaker adopts a fully enclosed structure, and the main circuit components are installed
longitudinally in an insulating cylinder. The insulating cylinder is casted by epoxy resin using the APG process. It has good arc resistance, anti-aging, high strength characteristics, and can effectively To prevent the impact of external factors such as external force impact, polluted environment and other factors on the vacuum arc extinguishing chamber, at the same time increase the ability of the conductive circuit body to withstand dynamic and thermally stable current.

3.3 Operating mechanism
The operating mechanism is a spring energy storage mechanism, with a modular design, simple and reasonable structure, high mechanical strength and rigidity, thus ensuring that the mechanical performance of the circuit breaker is stable and reliable. The operating mechanism is composed of closing unit, opening, energy storage unit, indicating device and other parts. There are closing and opening buttons in the front, manual energy storage operation lever, spring energy storage status and closing and opening indication signs, etc. , The operation is simple and convenient.

3.4 Energy storage
The energy required for closing the circuit breaker is provided by the closing spring. The energy storage can be done either by the motor or by inserting the energy storage handle into the manual energy storage hole and shaking it clockwise for manual completion. At this time, the circuit breaker is ready for closing.

3.5 Closing
During the closing process, you can manually press the "closing button" or remote operation to make the closing electromagnet move the switch into the closing state. At this time, the switch displays "not stored" and the closing and opening indication " The auxiliary switch is switched to the closed position, and if the external power supply is also connected, it will enter the energy storage state again.

3.6 Open
Not only can press the opening button, but also can connect the external power supply to make the opening trip solenoid operate,the switch enters the opening state, and the energy stored by the contact spring and the opening spring separates the dynamic and static contacts of the arc extinguishing chamber. During the brake process, the hydraulic buffer absorbs the residual energy of the opening process and defines the position of the opening. The sign indicates the position of "minute". At the same time, the counter counts and the auxiliary switch is switched.
NO.
Name
unit
1
Rated voltage
KV
12
2
[min power frequency withstand voltage (effective value) (interphase, ground, fracture)
KV
42
Lightning impulse withstand voltage (peak value) (interphase, ground, fracture)
75
3
Rated current
A
630、1000、1250、1600
2000、2500、3150
4
Rated short-circuit breaking current
KA
20 25 31.5 40
5
Rated short circuit and current (peak value)
KA
50 63 80 100
6
Rated dynamic stable current (peak value)
KA
50 63 80 100
7
Rated thermal stability current
KA
20 25 31.5 40
8
Rated thermal stability time
S
4
9
Rated short-circuit current breaking times
times
30
10
Mechanical life
times
30000
11
Rated operating sequence
O-0.3S-CO-180S-CO
12
Single capacitor breaking capacity
A
630
13
Back-to-back capacitor bank breaking capacity
A
400
14
Contact opening
mm
9±1
15
Contact stroke
mm
3.5 ±1
16
Three-phase opening synchronization
ms
w2
17
Bounce time of closing contact
ms
w2
18
Buffer stroke
mm
10
19
Center distance
mm
210 250 275
20
Average opening speed
m/s
1.2 ±0.3
21
Average closing speed
m/s
0.6 ±0.2
22
Conductive loop resistance
u 0
W50 (630A-1250A)
«40 (1600A-3150A)
23
Accumulative allowable wear thickness of dynamic and static contacts
mm
3
ZN88C-12 I type side-mounted fixed vacuum circuit breaker is a new generation of 12K V vacuum circuit breaker with domestic leading level independently developed (patented product) by our company.

The main feature is the three-phase longitudinal arrangement of the main conductive circuit. At the same time, it creatively combines the operating mechanism of the circuit breaker, isolating switch and grounding switch into the same operating mechanism.

It has small size, compact structure, complete functions, reliable performance and no need. The advantages and characteristics of debugging.

The ZN88C-12 I side-mounted fixed vacuum circuit breaker fully complies with GB1984 and China's power industry standard D L403,and also meets the IEC62271-100 standard specifications and other relevant standards of major industrialized countries.

The ZN88C-12 I type side-mounted fixed vacuum circuit breaker has passed the following various tests to ensure its safe operation.

Type test: power frequency withstand voltage, lightning impulse withstand voltage, temperature rise, short-term and peak withstand current, short-circuit current opening and closing ability, mechanical life and other tests.
Factory routine tests: mechanical characteristics test, main circuit power frequency withstand voltage test, auxiliary and control circuit insulation performance test, main circuit resistance test, interlock operation test, mechanical and electrical operation test.

ZN88C-12 I type side-mounted fixed vacuum circuit breaker can be widely used in power plant, power grid, metallurgy, chemical,urban infrastructure construction such as airport, building, subway and other projects.

ZN88C-12 I type side-mounted fixed vacuum circuit breaker can be used in control and protection cables, overhead lines,
transformers, motors, generators and capacitor banks in power distribution systems.

Due to its small width and compact structure, the ZN88C-12 I side-mounted fixed vacuum circuit breaker is particularly suitable for application in box-type substations, outdoor boxes, XGN15-12 ring network cabinets and other miniaturized fixed switchgear cabinets.

Conditions of use
Normal use conditions
*Ambient air temperature +40°C--15°C
*Relative humidity <=95%
*altitude:Under normal use conditions, the maximum altitude of the equipment installation site is not higher than 1000 meters
*earthquake:Earthquake intensity does not exceed 8 degrees
*other:The surrounding air environment should not be significantly polluted by corrosive or flammable gases, water vapor, etc.No serious pollution and frequent severe vibration

Special conditions of use
For the use of circuit breakers under special conditions, users and manufacturers negotiate and obtain consensus.

Advantages and characteristics of supporting switchgear
1.Can be used with GN39-12 three-station isolating switch to realize the circuit breaker inlet and outlet scheme. The circuit
breaker inlet and outlet cabinets can be 500mm wide and 1800mm high.
2. GN39-12 (ST) double-throw isolating switch can be used together. One switch cabinet can realize the function of dual power supply switching.
The dual power switch cabinet can be made 650mm wide and 2000mm high.
3. Compared with the traditional arrangement of components in the cabinet, due to the combination of circuit breakers,
disconnectors, grounding switches and door interlocking mechanisms on the same set of operating mechanisms, the
interlocking function is simple, reliable and very easy to install Convenient, no debugging required.
<TD colspa
No.
item
unit
data
1
Rated voltage
12
2
Rated short-term power frequency withstand voltage (1min)
42/48
3
Rated lightning impulse withstand voltage (peak value)
75/85
4
Rated frequency
Hz
50
5
Rated current
A
630
1250
630 1250
1250 1600
6
Rated short-circuit breaking current
20
25 31.5
Rated short-time withstand current
20
25 31.5
8
Rated peak withstand current
50
63 80
9
Rated short-circuit making current (peak value)
kA
50
63 80
10
4S thermal stable current
20
25 31.5
n
Rated dynamic stable current
50
63 80
12
Closed inrush current of rated capacitor bank
12.5 （frequency less than 1000Hz）
13
Rated single/back-to-back capacitor bank breaking current
630 / 400
14
Rated short-circuit duration
S
4
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