ZN139-12 Series
High-Voltage Vacuum
Circuit Breaker
（630-4000A）
Concise
Efficient
Safe
Comprehensive
PRODUCT OVERVIEW
High-voltage circuit breakers are very critical equipment in the power system, mainly used for controlling and protecting the power grid. They are capable of withstanding voltage levels up to kV, thus playing a vital role in the transmission and distribution process. They are suitable for controlling and protecting the grid with AC 50Hz, rated voltage of 12kV, and rated operating current of 630A to 4000A. It's widely used in used in industrial and mining enterprises, substations and other places, especially suitable for frequent operation.
Product characteristics
Enhance customer productivity
Ensure safety of personnel and assets
Optimize investment costs of whole life cycle
Embedded pole
ZN139 series vacuum circuit breaker adopts advanced casting embedded pole, and its special structure ensures that the vacuum arc-extinguishing chamber is reliably protected from mechanical impact, dust and moisture.
Making and breaking current in vacuum
- Vacuum circuit breakers do not require an arc-extinguishing and insulating medium. In fact, there are no substances in the chamber that can be ionized.
- In any case, when the contacts are separated, the arc channel between the contacts is only made of the metallic vapors of the contact material.
- When the main circuit current naturally disappears at zero crossing, the arc cannot be held. At the time, the rapidly decreasing carrier density and the rapidly condensing vacuum metal vapor quickly recover the insulation between the contacts.
- Thus, the vacuum arc-extinguishing chamber recovers insulation and restores the capability to withstand the transient recovery voltage of the system, and eventually extinguishes the arc.
Vacuum arc-extinguishing chamber
The cup-shaped longitudinal magnetic contatcs are made of high-quality material and have low chopping current value; use the one-time tube sealing and exhausting technique, with high dielectric recovery strength and low air leakage rate; high mechanical strength, long mechanical life; strong making and breaking insulation recovery greatly reduces the reignition and TRV breakdown.
Product structure
Structural characteristics
- ● Extractable or fixed installation
- ● Solid, reliable, compact for less maintenance workload
- ● Mechanical anti-trip device as standard configuration
- ● Built-in energy storage rod for operating mechanism
- ● Pouring technology for lifetime embedded pole
- ● Vacuum making and breaking technology
- ● Vacuum arc-extinguishing chamber is reliably protected against mechanical impacts, dust and moisture
- ● A complete series of secondary accessories available
- ● Circuit breakers can be swung in and out manually, only when the cabinet door is closed
- ● 位Safety interlock on the operating mechanism and the chassis prevents errors and dangerous operation
- ● Opening and closing buttons can be equipped with padlock or protective cover
- ● Suitable for different climates
Technical parameters
ZN139-12/D Permanent magnetic vacuum circuit breaker technical
| No. | Name | Unit | Parameters | ||
| 1 | Rated voltage | kV | 12 | ||
| 2 | Rated frequency withstand voltage phase-to-phase, phase-to-ground/contatcs (1min) | kV | 42/48 | ||
| 3 | Rated lightning impulse voltage phase-to-phase, phase-to-ground/contatcs (peak) | kV | 75/85 | ||
| 4 | Rated frequency | Hz | 50 | ||
| 5 | Rated current | A | 630-2500 | 630-3150* | 630-4000* |
| 6 | Rated short-circuit breaking current | kA | 20 25 | 31.5 | 40 |
| 7 | Rated short-circuit making current | kA | 50 63 | 80 | 100 |
| 8 | Rated peak withstand current | kA | 50 63 | 80 | 100 |
| 9 | Rated thermal stability current (RMS) | kA | 20 25 | 31.5 | 40 |
| 10 | Rated short-circuit duration | s | 4 | ||
| 11 | Times of rated short-circuit breaking current | Times | 30000/40000 | ||
| 12 | Mechanical life | 30 | 30 | 30 | |
| 13 | Rated current breaking times (electrical life) | 30000/40000 | |||
| 14 | Mechanical life of permanent magnet mechanism | - | 120000 | 120000 | 120000 |
| 15 | Rated current breaking times (electrical life) | A | 630/400(40kA為800/400） | ||
| 16 | Mechanical life of permanent magnet mechanism | mm | 150 210 275 | ||
| 17 | Rated single/back-to-back capacitor bank breaking current | mm | 9±1 | ||
| 18 | Phase spacing | mm | 3±1 | ||
| 19 | Clearance between open contacts(1) | mm | 3 | ||
| 20 | Contact overtravel | ms | ≤2 | ||
Note: *3150A and above require forced air-cooling
ZN139-12/G Permanent magnetic vacuum Circuit BreakerTechnical Parameters
| No. | Name | Unit | Parameters | ||
| 1 | Rated voltage | kV | 12 | ||
| 2 | Rated frequency withstand voltage phase-to-phase, phase-to-ground/contatcs (1min) | kV | 42/48 | ||
| 3 | Rated lightning impulse voltage phase-to-phase, phase-to-ground/contatcs (peak) | kV | 75/85 | ||
| 4 | Rated frequency | Hz | 50 | ||
| 5 | Rated current | A | 630-2500 | 630-3150* | 630-4000* |
| 6 | Rated short-circuit breaking current | kA | 20 25 | 31.5 | 40 |
| 7 | Rated short-circuit making current | kA | 50 63 | 80 | 100 |
| 8 | Rated peak withstand current | kA | 50 63 | 80 | 100 |
| 9 | Rated thermal stability current (RMS) | kA | 20 25 | 31.5 | 40 |
| 10 | Rated short-circuit duration | s | 4 | ||
| 11 | Times of rated short-circuit breaking current | Times | 30 | 30 | 30 |
| 12 | Mechanical life | Times | 30000 | ||
| 13 | Rated current breaking times (electrical life) | A | 630/400(40kA為800/400） | ||
| 14 | Mechanical life of permanent magnet mechanism | mm | 150 210 275 | ||
| 15 | Rated single/back-to-back capacitor bank breaking current | mm | 10±1 | ||
| 16 | Phase spacing | mm | 3±1 | ||
| 17 | Clearance between open contacts(1) | mm | 3 | ||
| 18 | Contact overtravel | mm | ≤2 | ||
| 19 | Allowable wear cumulative thickness of dynamic and static contacts | ms | ≤50 | ||
| 20 | Three-phase opening and closing non-synchronism | ms | ≤70 | ||
| 21 | Rated operating sequence | - | 0.3s? 180s 180s? 180s O —— CO—— CO O —— CO—— CO |
||
Note: *3150A and above require forced air-cooling
Selection table
ZN139-12 Series High-voltage Vacuum Circuit Breaker
| ZN139 | 12 | GD | 630 | 25 | Handcart type | P | H | Anti-trip relay |
| Product code | Voltage level | Product function | Rated current | Breaking current | Installation method | Mechanical life of permanent magnet mechanism(P) | Pole spacing (H) | Accessories |
| ZN139： Vacuum Circuit Breaker |
12kV | G: Spring embedded insulation GD: Permanent magnet embedded insulation D: Permanent magnet composite insulation T: Spring composite insulation |
630A 1250A 1600A 2000A 2500A 3150A 4000A |
20kA 25kA 31.5kA 40kA |
Handcart type Fixed front mounted Fixed side mounted |
150mm 210mm 275mm |
275mm 310mm |
Anti-trip relay Cut-off capacitor bank Undervoltage tripping device Door interlock Chassis extended swing handle/85mm Electric chassis + controller Chassis program lockProgram lock |
Technical Parameters
-
1. Rated voltage（kV）：12
2. Rated frequency withstand voltage phase-to-phase, phase-to-ground/contatcs (1min)（kV）：42/48
3. Rated lightning impulse voltage phase-to-phase, phase-to-ground/contatcs (peak)（kV）：75/85
4. Rated frequency（Hz）：50
5. Rated current（A）：630-2500/630-3150*/630-4000*
6. Rated short-circuit breaking current（kA）：20 25/31.5/40
7. Rated short-circuit making current（kA）：50 63/80/100
8. Rated peak withstand current（kA）：50 63/80/100
9. Rated thermal stability current (RMS)（kA）：20 25/31.5/40
10. Rated short-circuit duration（s）：4
11. Times of rated short-circuit breaking current（Times）：30/30/30
12. Mechanical life（Times）：30000/40000
13. Rated current breaking times (electrical life)：30000/40000
14. Mechanical life of permanent magnet mechanism:120000/120000/120000
15. Rated current breaking times (electrical life)（A）：630/400(40kA為800/400）
16. Mechanical life of permanent magnet mechanism（mm）：150 210 275
17. Rated single/back-to-back capacitor bank breaking current（mm）：9±1
18. Phase spacing（mm）：3±1
19. Clearance between open contacts(1)（mm）：3
20. Contact overtravel（ms）：≤2
-
1. Rated voltage（kV）：12
2. Rated frequency withstand voltage phase-to-phase, phase-to-ground/contatcs (1min)（kV）：42/48
3. Rated lightning impulse voltage phase-to-phase, phase-to-ground/contatcs (peak)（kV）：75/85
4. Rated frequency（Hz）：50
5. Rated current（A）：630-2500/630-3150*/630-4000*
6. Rated short-circuit breaking current（kA）：20 25/31.5/40
7. Rated short-circuit making current（kA）：50 63/80/100
8. Rated peak withstand current（kA）：50 63/80/100
9. Rated thermal stability current (RMS)（kA）：20 25/31.5/40
10. Rated short-circuit duration（s）：4
11. Times of rated short-circuit breaking current（Times）：30/30/30
12. Mechanical life（Times）：30000
13. Rated current breaking times (electrical life)：630/400(40kA為800/400）
14. Mechanical life of permanent magnet mechanism（mm）：150 210 275
15. Rated single/back-to-back capacitor bank breaking current（mm）：10±1
16. Phase spacing（mm）：3±1
17. Clearance between open contacts(1)（mm）：3
18. Contact overtravel（mm）：≤2
19. Allowable wear cumulative thickness of dynamic and static contacts（ms）：≤50
20. Three-phase opening and closing non-synchronism（ms）：≤70
21. Rated operating sequence：0.3s?180s O —— CO—— CO / 180s??180s O —— CO—— CO
Selection table
-
Product code：ZN139：Vacuum Circuit Breaker
Voltage level：12kV
Product function：GG: Spring embedded insulation /GD: Permanent magnet embedded insulation /D: Permanent magnet composite insulation /T: Spring composite insulation
Rated current：630A/1250A/1600A/2000A/2500A/3150A /4000A
Breaking current：20kA/25kA/31.5kA/40kA
Installation method：Handcart type/Fixed front mounted/Fixed side mounted
Mechanical life of permanent magnet mechanism(P)：150mm/210mm/275mm
Pole spacing (H) ：275mm/310mm
Accessories：Anti-trip relay /Cut-off capacitor bank /Undervoltage tripping device /Door interlock /Chassis extended swing handle/85mm/Electric chassis + controller/Chassis program lockProgram lock
TYSEN-SAE Electrical Co., Ltd. Jiangsu ICP File No.16025679