About Air Circuit Breaker
Air Circuit Breaker
Air Circuit Breakers meeting complex requirements of electrical systems of today and tomorrow ensuring reliability which can offer un-interrupted service throughout the product life undergoing all the stresses that system encounters. Apart from meeting all the traditional requirement of power circuit breakers ( high breaking capacity, 3pole & 4pole, cool running at higher temperature, selectivity, absolutely no maintenance, draw out option), W Nmaster now offers total solution for modern day requirement for measurement, analysis and communications, all in optimized size.W Nmaster circuit breakers use the latest technology to enhance performance and safety. Compact yet offering various connections for ease of installation, snap on site fit accessories, enhanced life and intuitive operation makes them a very user friendly range of circuit breaker for any application.
Technical Specification:
| Characteristics as per IEC 60947-2 / Frame size | WM-A | WM-B |
| Type | WM06 | WM08 | WM10 | WM12 | WM16 | WM20 | WM20 | WM25 | WM32 | WM40 |
| Rated current (A) | In | At 40 oC / 50 oC | 630 | 800 | 1000 | 1250 | 1600 | 2000 | 2000 | 2500 | 3200 | 4000 |
| CT Rating (A) | 400, 630 | 400, 630, 800 | 400, 630, 800, 1000 | 400, 630, 1000, 1250 | 400, 630, 1000, 1250, 1600 | 400, 630, 1000, 1250, 1600, 2000 | 2000 | 2000, 2500 | 2000, 2500, 3200 | 2000, 2500, 3200, 4000 |
| Rating of 4th Pole (A) | 100% | 100% |
| Number of poles | 3/4 | 3/4 |
| Rated insulation voltage (V) | Ui | 1000 | 1000 |
| Impulse withstand voltage (kV) | Uimp | 12 | 12 |
| Rated operational voltage (V AC 50/60 Hz) | Ue | 690 | 690 |
| Suitability for isolation | IEC 60947-2 | IEC 60947-2 |
| Degree of pollution | 3 | 3 |
| Ultimate breaking capacity (kA rms) | Icu | 380/400/415 V AC | 50kA | 65kA |
| 500V | 40kA | 55kA |
| 550V | 35kA | 50kA |
| 690V | 30kA | 40kA |
| Rated service breaking capacity (kA rms) | Ics | % Icu | 100% | 100% |
| Utilisation category | B | B |
| Rated short-time withstand current (kA rms) | Icw |
| 50kA | 65kA |
| V AC 50/60 Hz | 1s | 105kA | 143kA |
| Rated making capacity (kA peak) | Icm | 380/400/415 V AC | 84kA | 121kA |
| V AC 50/60 Hz | 500 V | 74kA | 105kA |
| 500 V | 63kA | 84kA |
| 690 V | 30ms | 30ms |
| Opening time (ms) | 40ms | 40ms |
| Closing time (ms) | 20000 | 15000 |
| Service life | Mechanical with maintenance | 10000 | 8000 | 7000 | 5000 |
| Electrical with maintenance | 60 | 60 | 60 | 60 | 30 | 30 | 20 | 20 | 20 | 10 |
| Motor power | 380/415 V (kW) |
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| Weight (kgs) | Fixed | 3 Pole | 52.40 | 54.40 | 56.40 | 67.90 |
| 4 Pole | 62.40 | 64.40 | 66.40 | 77.90 |
| Drawout | 3 Pole | 92.30 | 94.30 | 96.30 | 131.20 |
| 4 Pole | 102.30 | 104.30 | 106.30 | 141.20 |
| Dimension (mm) (H x W x D) | Fixed | 3 Pole | 398 x 332 x 386 | 398 x 488 x 386 |
| 4 Pole | 398 x 432 x 386 | 398 x 618 x 386 |
| Drawout | 3 Pole | 459 x 416 x 512 | 459 x 510 x 512 |
| 4 Pole | 459 x 516 x 512 | 459 x 640 x 512 |
Versatile Electrical ProtectionDesigned for various industrial applications, this Air Circuit Breaker safeguards against overloads, short circuits, and earth faults. Its versatility is evident with manual and electrical operation modes, auxiliary contacts, and compatibility with fixed or withdrawable installations. Meeting demanding performance needs, it supports up to 85 kA breaking capacity and can be configured for three-phase systems, making it ideal for safe power distribution in commercial and industrial setups.
Flexible Configuration and InstallationChoose between 3-pole and 4-pole versions, with rated currents from 630A to 5000A to suit your facilitys requirements. Installation options are flexiblewhether fixed or withdrawableallowing easy adaptation to new or existing electrical panels. The standardized frame and thoughtful design ensure compatibility, while the protection class IP20 and broad operating temperature range make it suitable for varied environments across India.
FAQs of Air Circuit Breaker:
Q: How is the Air Circuit Breaker installed and what are its mounting options?
A: The Air Circuit Breaker can be installed using either fixed or withdrawable mounting methods. This allows for flexible integration into both new and existing switchgear panels, making maintenance and replacements straightforward for electrical professionals.
Q: What are the main protection functions provided by this Air Circuit Breaker?
A: This breaker offers comprehensive protection, including overload, short circuit, and earth fault protection. These functions help maintain the safety and reliability of power systems in industrial and commercial environments.
Q: When should I select 3-pole versus 4-pole configurations for my application?
A: The choice between 3-pole and 4-pole depends on your systems requirements. For three-phase power systems without a neutral conductor, 3-pole is sufficient, while 4-pole is suitable if neutral protection is necessary or when dealing with unbalanced loads.
Q: What are the available modes of operation for this Air Circuit Breaker?
A: The breaker supports both manual and electrical operation modes, allowing for convenient on-site control as well as remote electrical operation through control circuitsideal for automated or critical system applications.
Q: Where is this Air Circuit Breaker typically used in India?
A: It is widely used in industrial, commercial, and utility sectors across India. Applications include manufacturing plants, data centers, commercial buildings, and power distribution systems, wherever reliable circuit protection and high breaking capacity are essential.
Q: What benefits does the microprocessor-based release option offer?
A: The microprocessor-based thermal protection offers precise, customizable protection settings, enabling higher sensitivity in monitoring overloads, short circuits, and earth faults. This advanced technology enhances reliability and minimizes false tripping.
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