Vacuum Circuit Breaker (TZN2 Indoor High Voltage Circuit Breaker)

Vacuum Circuit Breaker   <small>(TZN2 Indoor High Voltage Circuit Breaker)</small>
Vacuum Circuit Breaker   <small>(TZN2 Indoor High Voltage Circuit Breaker)</small>
Vacuum Circuit Breaker   <small>(TZN2 Indoor High Voltage Circuit Breaker)</small>
Vacuum Circuit Breaker   <small>(TZN2 Indoor High Voltage Circuit Breaker)</small>
Vacuum Circuit Breaker   <small>(TZN2 Indoor High Voltage Circuit Breaker)</small>
Vacuum Circuit Breaker   <small>(TZN2 Indoor High Voltage Circuit Breaker)</small>
Vacuum Circuit Breaker   <small>(TZN2 Indoor High Voltage Circuit Breaker)</small>
Vacuum Circuit Breaker   <small>(TZN2 Indoor High Voltage Circuit Breaker)</small>
Vacuum Circuit Breaker   <small>(TZN2 Indoor High Voltage Circuit Breaker)</small>
Vacuum Circuit Breaker   <small>(TZN2 Indoor High Voltage Circuit Breaker)</small>
Vacuum Circuit Breaker   <small>(TZN2 Indoor High Voltage Circuit Breaker)</small>
Vacuum Circuit Breaker   <small>(TZN2 Indoor High Voltage Circuit Breaker)</small>
Vacuum Circuit Breaker   <small>(TZN2 Indoor High Voltage Circuit Breaker)</small>
Vacuum Circuit Breaker   <small>(TZN2 Indoor High Voltage Circuit Breaker)</small>
Vacuum Circuit Breaker   <small>(TZN2 Indoor High Voltage Circuit Breaker)</small>
Vacuum Circuit Breaker   <small>(TZN2 Indoor High Voltage Circuit Breaker)</small>
Vacuum Circuit Breaker   <small>(TZN2 Indoor High Voltage Circuit Breaker)</small>
Vacuum Circuit Breaker   <small>(TZN2 Indoor High Voltage Circuit Breaker)</small>
Vacuum Circuit Breaker   <small>(TZN2 Indoor High Voltage Circuit Breaker)</small>
Vacuum Circuit Breaker   <small>(TZN2 Indoor High Voltage Circuit Breaker)</small>
Vacuum Circuit Breaker   <small>(TZN2 Indoor High Voltage Circuit Breaker)</small>
Vacuum Circuit Breaker   <small>(TZN2 Indoor High Voltage Circuit Breaker)</small>
Vacuum Circuit Breaker   <small>(TZN2 Indoor High Voltage Circuit Breaker)</small>
Vacuum Circuit Breaker   <small>(TZN2 Indoor High Voltage Circuit Breaker)</small>
Vacuum Circuit Breaker   <small>(TZN2 Indoor High Voltage Circuit Breaker)</small>
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TZN2 Series Vacuum Circuit Breakers
  • TZN2-12 Vacuum Circuit Breaker
    Rated voltage: 12KV
    Max. rated short-circuit
    Breaking current: 40KA
    Rated current: 630A~4000A
  • TZN2-24 Vacuum Circuit Breaker
    Rated voltage: 24KV
    Max. rated short-circuit
    Breaking current: 40KA
    Rated current: 630A~3150A
  • TZN2-40.5 vacuum circuit breaker
    Rated voltage: 40.5KV
    Max. rated short-circuit
    Breaking current: 31.5KA
    Rated current: 630A~3150A

Introduction
A circuit breaker (CB) is a switching device designed to protect electrical circuits from damage caused by overload or short circuit. Our TZN2 series vacuum circuit breaker (VCB)is the latest domestic achievement. It is available in many varieties, excellent in performance, and widely applicable to:
a. energy and infrastructure: power plants, 220KV/110KV substations, primary and secondary distribution systems.
b. industrial production: power supply systems for pulp and paper, construction materials (glass, cement, ceramics), steel and metal products, aluminum, petrochemical and other industrial productions.
c. building:power supply system of large-, medium-sized buildings and residential areas.
d. other: petrochemical, transportation, and mining areas

Complete Series
Rated voltage: 10kV (12kV), 20kV (24kV), 36kV (40.5kV)
Rated current: 630A, 1250A,1600A, 2000A, 2500A, 3150A,4000A,
Rated short circuit breaking current: 20kA, 25kA, 31.5kA, 40kA

Technology Leader
The TZN2 indoor high voltage circuit breaker adopts the latest domestic vacuum interrupter, which boasts the high-quality copper chrome contacts and the advanced operating mechanism made by optimized longitudinal magnetic field breaking technology. It ensures the excellent electrical characteristics of the VCB.

Vacuum interrupter:
1. movable conductive rod
2. guide sleeve
3. bellow
4.movable cover plate
5. bellow shield
6. porcelain shell
7. shield tube
8. contact system
9. static conductive rod
10. static cover plate

Flexible Configuration
The operating mechanism of the indoor high voltage circuit breaker is of positive arrangement, allowing fixed and withdrawable mounting methods as well as manual and electric drive methods. The mechanism is suitable for ABB-UniGear, SIEMENS-NXAIR, SCHNEIDER-NVNEX and TELLHOW-KYN28A series medium voltage switchgears.

Safe and Reliable
The spring mechanism of the vacuum circuit breaker is of modular design and simple working principle. The structure is compact with less transmission parts, so that movements are stable and reliable, mechanical life is prolonged, and maintenance will not be frequency asked for. The complete electrical and mechanical interlock ensures the operator’s safety during the operation and maintenance of medium voltage switchgear.

Superior Quality
TZN2 series vacuum circuit breakers all should pass rigorous routine tests. Parts and their suppliers are required in accordance with the latest domestic supplier quality management system (SQM) to pass periodic assessment to ensure quality consistency. Our designing, manufacturing, mounting, and servicing comply with rules of ISO 9001: 2000 quality management system.

Environmentally Friendly
The design of the TZN2 series vacuum circuit breaker is based on European environmental standards, in full compliance with requirements of ISO14001 environmental management system. Our waste parts recycling rate reaches 80%.

Technical Parameters
TZN2 Series Vacuum Circuit Breaker Technology Parameters
Rated voltage Ur [kV] 12 24 40.5
Rated insulation voltage Us [kV] 12 24 40.5
Frequency withstand voltage Ud (1min)[kV] 42 79 95
Lightning impulse withstand voltage Up [kV] 75 145 185
Rated frequency Fr [Hz] 50-60 50-60 50-60
Rated current Ir [A] 630, 1250 630, 1250 630, 1250, 1600
2000, 2500, 3150
4000
1250, 1600, 2000
2500, 3150, 4000
630, 1250 630, 1250 630, 1250, 1600
2000, 2500,3150
630, 1250 630, 1250 630, 1250, 1600
2000, 2500,3150
Rated breaking capacity Isc [kA] 20 25 31.5 40 20 25 31.5 20 25 31.5
Rated short time withstand current (4 seconds) Ik [kA] 20 25 31.5 40 20 25 31.5 20 25 31.5
Closing capacity Ip [kA] 50 63 80 100 50 63 80 50 63 80
Order of operations [O-0.3s-CO-180s-CO]

[O-180s-CO-180s-CO]
Opening time [ms] ≤ 50 ≤ 50 ≤ 50
Arcing time [ms] ≤ 15 ≤ 15 ≤ 15
Breaking time [ms] ≤ 70 ≤ 70 ≤ 70
Closing operation rated voltage [V] AC/DC 110/220/230/48/24 AC/DC 110/220/230/48/24 AC/DC 110/220/230/48/24
Opening operation rated voltage [V] AC/DC 110/220/230/48/24 AC/DC 110/220/230/48/24 AC/DC 110/220/230/48/24
Charging motor rated voltage [V] AC/DC 110/220/230/48/24 AC/DC 110/220/230/48/24 AC/DC 110/220/230/48/24
Charging motor rated power [W] 70 70, 120 70 70, 120 70 70, 120
Energy storage time [s] ≤ 15 ≤ 15 ≤ 15
Mechanical life [ times ] 30,000 30,000 20,000 20,000
Auxiliary switch NO NC 4NO 4NC, 7NO 7NC (Max.10NO 10NC) 4NO 4NC, 7NO 7NC (Max.10NO 10NC) 4NO 4NC, 7NO 7NC (Max.10NO 10NC)
Secondary circuit power frequency withstand voltage (1min) [V] 2,000 2,000 2,000
Short circuit current breaking times [ times ] 274 274 274
Rated short time current duration [s] 4 4 4
Breaker grading [ms] M2-E2-C2 M2-E2-C2 M2-E2-C2
Dimensions
12kV Withdrawable Vacuum Circuit Breaker Dimensions
Switchgear Width (mm ) 800 800 800 1000 1000 1000 1000 1000
Rated current (A) 630 1250 1600 630 1250 1600 2000 2500-4000
Rated short circuit breaking current (KA) 25-31.5 25-40 31.5-40 25-31.5 25-40 31.5-40 31.5-40 31.5-40
Pole-center distance (mm) 210 210 210 275 275 275 275 275
A 638 638 638 838 838 838 838 838
B 277 277 277 377 377 377 377 377
C 640 640 640 840 840 840 840 840
D 652 652 652 852 852 852 852 852
E 681 681 681 881 881 881 881 881
F 515 515 515 515 515 660 660 720
G 280 280 280 280 280 385 385 385
H 275 275 275 275 275 310 310 310
I Ф35 Ф49 Ф55 Ф35 Ф49 Ф55 Ф79 Ф109
J 508 508 508 508 508 536 536 536
K 40 40 40 40 40 0 0 0
L 89 89 89 89 89 89 89 89
M 78 78 78 78 78 88 88 88
N 76 76 76 76 76 77 77 77
P 182 182 182 182 182 170 170 170
Q 433 433 433 433 433 361 361 361
R 598 598 598 598 598 586 586 586
S 637 637 637 637 637 698 698 735
12kV Fixed Vacuum Circuit Breaker Dimensions
Switchgear Width (mm ) Rated current (A) Rated short circuit
breaking current (KA)
P A B C D E F G H J K
800 630 25-31.5 210 520   588 111 275 580 237 275 428 445
800 1250 25-40 210 520   588 111 275 580 237 275 428 445
800 1600 31.5-40 210 520   588 111 275 580 237 275 428 445
1000 630 25-31.5 275 650 700 770 111 275 580 237 275 428 445
1000 1250 25-40 275 650 700 770 111 275 580 237 275 428 445
1000 1600 31.5-40 275 650 700 770 111 275 632 252 275 428 445
1000 2000 31.5-40 275 650 700 770 111 275 632 252 275 428 445
1000 2500-4000 31.5-40 275 650 700 770 111 275 632 252 275 428 445
24kV Withdrawable Vacuum Circuit Breaker Dimensions
Rated operating current (A) Rated breaking current (KA) Static contact size (mm) Dimension data (mm)
630
1250
25 31.5 Ф 35
Ф 49
P A B C H K S
210 638 652 640 770 681 277
275 838 852 840 815 881 377
Rated operating current (A) Rated breaking current (KA) Static contact size (mm) Dimension data (mm)
1600 2000
2500 3150
25 31.5 Ф 55 Ф 79
Ф 109 Ф 109
P A B C H K S
275 838 852 840 815 881 377
24kV Fixed Vacuum Circuit Breaker Dimensions
Rated operating current (A) Rated breaking current (KA) Static contact size (mm) Dimension data (mm)
630 1250 25 31.5 —— P A B C
210 520 —— 588
275 650 700 770
Rated operating current (A) Rated breaking current (KA) Static contact size (mm) Dimension data (mm)
1600 2000
2500 3150
25 31.5 —— P A B C
275 650 700 770
40.5kV Withdrawable Vacuum Circuit Breaker Dimensions
Rated operating current (A) Rated breaking current (KA) Static contact size (mm)
1600 2000
2500 3150
25 31.5 Ф 35 Ф 49
Ф 55 Ф 79
Structure
A: air plug
B: panel
C: chassis
D: contact
F: contact arm contact arm sleeve
G: bending plate
A: circuit breaker auxiliary contact
B: motor
C: PCB
E: operation counter
F: trip coil OPEN, undervoltage shunt trip, second trip coil OPEN
G: latching solenoid
H: trip coil CLOSE
I: energy storage instruction
J: points closing instructions
K: charging handle insertion hole
Configuration Details
1. Basic configuration
Closing / Opening
Coils TQ,HQ
Counter

Auxiliary Switch QF

Drive Device

Microswitch S1-S3

Charging Motor M1

Electromagnetic
Lock Y1
Terminal blocks
for CB Truck
PCB

2. Option configuration

a. withdrawable latching solenoid (RL2)
The function is to prevent the withdrawable circuit breaker from being drawn into switchgear in the case of being connected with secondary circuit air outlet. For the secondary air outlet, matching proper pin matrix with different currents can prevent circuit breaker with wrong rated current from being drawn into switchgear.

b. secondary shunt opening release (MO2)
The opening release allows another set of independent secondary power supply, and allows remote opening control.

c. shunt opening release (MO1)
This allows remote opening control of the apparatus. The release can operate both in direct and alternating current.

d. opening solenoid (MO3)
The opening solenoid is a special demagnetization release, mounted on the right side of the mechanism, and the input control device is installed on the switchgear.

e. shunt closing release (TQ2)
The shunt closing release enables remote control over circuit breaker closing. AC and DC power supply are both workable for the operation. The continuous closing command applied to the closing release can achieve anti-skip function. This electrical characteristic is consistent with the performance of shunt opening release.

f. undervoltage and no-voltage device (MU)
When the secondary control power supply voltage falls below 65% or the power is off, the device will automatically opening the circuit breaker. The release cannot be used as spare opening release.

g. sliding contact (-S4)
Instantaneous sliding contact sends signals temporarily when the circuit breaker is opening. No signal is sent in the case of manual tripping, and mechanical interlock will act on the switches at two positions. In the case of electric opening, mechanical interlock usually acts on switches at frequent opening positions only.

Service Conditions
Normal service condition indoor
Ambient temperature -15 ℃ ~ 40 ℃
Altitude *1000m
Humidity
Daily average ≤ 95%
Monthly average ≤ 90%
Earthquake intensity ≤ 8 grade

For other requirements, please contact us.

Standard Compliance
IEC 62271-100 High Voltage AC Circuit Breakers
IEC 60694 Common Specification for High Voltage Switchgear and Control Gear Standards
GB1984-2003 High Voltage AC Circuit Breakers
GB/T11022-1999 Common Technical Requirements for HV Switchgear
DL/T 402-1999 Technical Specification for HV AC Circuit Breaker
DL/T 403-2000 Technical Specification for12kV- 40.5kV indoor HV AC Circuit Breaker
DL/T 593-2006 Common Specification for HV Switchgear Enquiry and Orders
JB/T 3855-1996 Technical Specification for 3.6kV- 40.5kV indoor HV AC Circuit Breaker

Type Tests
a. dielectric strength test
b. temperature rise test
c. breaking capacity test
d. dynamic thermal stability test
e. mechanical life test
f. electrical life test
g. mechanical life curve

Special Tests
transport and storage test

Quality Control System
In the production process, each circuit breaker is manufactured with advanced processing technology and subjected to routine tests. This is to ensure good quality and consistency before delivery,in line with the requirements of ISO 9001:2000 quality management system. The test reports are signed by our quality control department to ensure the traceability.

The following items will go through our rigorous systematic routine tests:
a. 1 min power frequency withstand voltage test on main circuit: between open contacts, phase-to-phase, phase to earth
b. VCB mechanism operating low voltage test
c. dielectric test in auxiliary and control circuit
d. mechanical characteristic test
e. circuit resistance test
f. contact simultaneity test
g. opening and closing time
h. bouncing time
i. out-looking check

Model Description
TZN2 12 630 25 210 D
Breaker name Rated voltage Rated operating current Rated short-circuit breaking current Pole-center distance Breaker type

12 12KV 630 630A 25 25KA 210MM D Withdrawable type

24 24KV 1250 1250A 31 31.5KA 275MM F Fixed type

40.5 40.5KV 1600 1600A 40 40KA
K Floor type



2000 2000A






2500 2500A






3150 3150A






4000 4000A



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