Author Archives: Leonardo Tomás Cardillo

Off-delayed: Describes a delay in deactivation—after the control signal is removed, the device remains active for a set period before switching off. Off-delayed undervoltage release: A type of release mechanism that delays disconnection of a circuit after voltage drops below a specified threshold, allowing brief dips without interrupting power. Ohm’s Law: A fundamental principle ofContinue reading “2025.05.03 – O – Dictionary Section”

N/C contact (Normally Closed contact): A contact that remains closed (allowing current flow) when the device is not energized. It opens when the device is activated, often used in safety circuits. N/O contact (Normally Open contact): A contact that remains open when the device is not energized and closes upon activation, allowing current to flow.Continue reading “2025.05.03 – N – Dictionary Section”

Mains chokes: Inductive components installed in the power supply line to reduce harmonics and smooth electrical noise. Often used with motors or drives to improve power quality. Maintenance switches: Safety switches used to disconnect equipment from power sources during maintenance or servicing, ensuring operator protection. Marking: The process of labeling electrical components, terminals, and wiringContinue reading “2025.05.03 – M – Dictionary Section”

Light barriers: Optoelectronic devices used for object detection or position monitoring. They work by transmitting a light beam from an emitter to a receiver, triggering a signal when the beam is interrupted. Liquid level monitoring relay: A relay designed to monitor and control the level of liquids (like water, oil, or chemicals) in tanks orContinue reading “2025.05.03 – L – Dictionary Section”

JSON API: A type of web-based Application Programming Interface (API) that uses JSON (JavaScript Object Notation) as its data format. In the context of industrial or electrical systems, a JSON API may be used to exchange data between controllers, monitoring software, or cloud-based platforms, enabling integration, automation, and remote diagnostics.

I/O module: Input/Output module used in control systems to interface between the controller (e.g. PLC) and field devices like sensors and actuators. In-delta connection: A wiring method for soft starters or current transformers where the device is connected within the delta loop of a three-phase motor, reducing the current flowing through the starter. Indicator light,Continue reading “2025.05.03 – I – Dictionary Section”

Heat sink: A passive component that dissipates heat away from electronic devices such as relays, drives, or power modules, helping maintain safe operating temperatures and prolonging lifespan. Heater switches: Switches designed specifically to control electrical heaters, often able to handle high current loads and temperature-related cycling. Heavy starting duty: A classification for motors or equipmentContinue reading “2025.05.03 – H – Dictionary Section”

Generator: A device that converts mechanical energy into electrical energy, typically used as a backup or primary power source in industrial and commercial applications. It can be driven by engines, turbines, or other rotating machines. General symbol: A standard schematic representation used in electrical diagrams to denote a common or generic function/component, such as aContinue reading “2025.05.03 – G – Dictionary Section”

Feedback Circuit: A control circuit that sends information from the output of a system back to its input, used to maintain stability or respond to changes in load or conditions. Feeder System MSFS: A modular feeder system (likely the Eaton MSFS series) designed for distributing power efficiently in control cabinets and industrial switchboards. First environment:Continue reading “2025.05.03 – F – Dictionary Section”

Early-make auxiliary contacts: Contacts that close slightly earlier than the main contacts during switching operations, allowing pre-signal or early activation in control circuits. Earth, general symbol Ground: The standardized schematic symbol representing the earth or ground connection, used to indicate a safety grounding point in electrical diagrams. Earth-fault release circuit-breaker: A protective device that tripsContinue reading “2025.05.03 – E – Dictionary Section”