- Bimetal:
A bimetal (or bimetallic strip) is composed of two metal layers with different thermal expansion rates. When exposed to heat, the metals expand unevenly, causing the strip to bend. This physical deformation is used to mechanically open or close electrical contacts, making bimetals ideal for thermal protection.
Function: In devices like thermal overload relays, a current-induced temperature rise causes the bimetal to curve. When the deformation reaches a certain point, it triggers a trip mechanism, interrupting the current to protect equipment like motors. Once cooled, the bimetal returns to its original form.
Applications: Found in overload relays, thermostats, and circuit breakers. It works without electronics, making it cost-effective, reliable, and autonomous.
- Box PC:
A compact, fanless industrial computer used in automation, process control, or data logging. It’s designed for harsh environments, with a sturdy enclosure that protects it from dust, vibration, and temperature fluctuations.
- Breakdown torque:
The maximum torque a motor can deliver without stalling, measured just before it loses synchronism. It’s a key value for evaluating motor performance under heavy or sudden loads.
- Bridging during starting:
A technique used to temporarily connect contacts during the start phase of a motor or system, facilitating a smoother startup by bypassing resistances or enabling short-duration parallel connections.
- Busbar system:
A metallic conductor system (usually copper or aluminum bars) used for efficient power distribution within switchgear, distribution panels, and circuit assemblies. It provides modular, flexible, and safe power routing, often with pre-assembled insulation and mounting systems.
- Buzzer, General symbol:
The standard schematic symbol used in electrical diagrams to represent a buzzer, a sound-emitting device that signals alarms, status changes, or process completions.
- Bypass circuit:
A secondary electrical path that allows current to bypass a component or section of a system. Used during maintenance, fault conditions, or to enable continued operation during a switchover.
- Bypass contacts:
Electrical contacts that engage a bypass circuit, allowing a device or load to remain energized while isolating another component. Often used in soft starters, UPS systems, or motor control centers.
Published by Leonardo Tomás Cardillo
https://www.linkedin.com/in/leonardocardillo
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