Automatic Circuit Breaker Gewiss: What It Is, How to Connect It, and Which One to Choose
Automatic circuit breakers are the foundation of safety in any electrical network. They protect equipment, wiring, and people from short circuits, overloads, and other hazardous situations. Choosing a high-quality device directly affects the stability of the electrical system. Among the many brands on the market, Gewiss circuit breakers stand out for their reliability, easy installation, and compliance with modern technical standards.
What Is an Automatic Circuit Breaker?
An automatic circuit breaker is a device that automatically interrupts the electrical circuit when critical loads occur, such as a short circuit or overload. Its main task is to prevent equipment failure or fire caused by overheating wiring.
Applications:
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In apartment distribution panels
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In office and commercial buildings
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In industrial facilities
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At infrastructure sites
These devices are an essential part of modern electrical safety systems.
Which Circuit Breakers Are the Best?
When choosing a circuit breaker, pay attention to several key features:
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Rated current: Select the appropriate value based on the cable cross-section and the expected load. For example, with a current of 9A, a 10A breaker is suitable. In household settings, use 25–32A at the input, 16–20A for sockets, and 6–10A for lighting. It's best to perform precise calculations. An incorrect rating may reduce protection efficiency or cause nuisance tripping.
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Trip curve type (tripping characteristic):
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Type B: minimal delay and low trip threshold — ideal for lighting and household appliances without inrush currents.
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Type C: a universal option for homes, apartments, and offices.
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Type D: withstands high inrush currents — suitable for industrial equipment (motors, pumps, air conditioners).
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Breaking capacity: Indicates the maximum short-circuit current the breaker can safely disconnect. The higher this capacity, the more reliable the device — some use precious metal contacts. For households, 4.5–6 kA is sufficient; for industry — 10 kA or more.
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Number of poles: Depends on the type of network — for single-phase: usually 1 (L) or 2 (L+N) poles; for three-phase: 3 (3L) or 4 (3L+N). While two- and four-pole breakers take up more space, they offer better protection by disconnecting both phase and neutral conductors.
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Trip unit type:
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Thermal — responds to overloads via a bimetallic strip.
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Magnetic — responds instantly to short circuits using a solenoid.
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Thermomagnetic — combines both types.
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Electronic — precise and adjustable, reacts to surges and short circuits using a microprocessor.
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Why Choose Gewiss Circuit Breakers?
Gewiss is a renowned European manufacturer of electrical equipment, known for its high quality, precision, and reliability. Gewiss breakers comply with international IEC/EN 60898-1 standards and feature:
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A durable, heat-resistant housing
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Accurate operation of thermal and magnetic trip units
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Easy labeling and installation
Gewiss Circuit Breaker Series Overview
The UEC catalog offers a wide selection of Gewiss circuit breakers:
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MT series:
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For household use
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Rated current: 6–63A
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Compact design
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MTC series:
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For commercial buildings and small industries
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Enhanced breaking capacity
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Protection against overload and short circuit
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MTX series:
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For industrial applications
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Extended operating temperature range
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High mechanical and electrical durability
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How to Connect a Circuit Breaker
Circuit breaker installation must follow all safety and electrical wiring regulations.
Basic steps to connect a circuit breaker:
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Disconnect the power supply
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Mount the breaker on the DIN rail
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Connect the incoming (phase) wire to the top terminal
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Connect the outgoing wire (to the load) to the bottom terminal
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Tighten the screws securely and check wire fixation
Important to remember:
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Only connect after verifying that no voltage is present
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Do not use wires with a cross-section larger than the terminal rating
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Make sure the breaker rating matches the actual load
Warning: If you have no experience, consult a qualified electrician.
| Why Gewiss Is the Right Choice |
Gewiss automatic circuit breakers combine European quality, reliability, and simple installation. They are perfect for both residential and industrial applications.
If you're wondering which circuit breakers are best — consider Gewiss. The UEC catalog features a wide range of models with various specifications to suit any task.
We recommend purchasing only from trusted sources and consulting an electrician or our specialist if needed.
The right choice ensures your safety.
