Technická podpora
In this blog, we’ll walk you through the installation and basic operation of the motor operator for ETIBREAK NBS moulded case circuit breakers (MCCBs). This accessory is designed to enhance control and convenience by enabling remote switching of the moulded case circuit breaker—both turning it ON and OFF----- from a distance.
Grounding and earthing are crucial for ensuring the safety and stability of electrical systems. While both AC and DC systems may require grounding, the requirements and implementation differ significantly. This article explores why DC systems do not always need grounding like AC systems and how regulations, including IEC standards, influence grounding practices in DC applications.
Installing internal accessories on a moulded case circuit breaker (MCCB) is a straightforward but essential process for enabling remote monitoring and improving system safety. In this blog, we’ll walk you through the step-by-step installation of two key accessories on the ETIBREAK NBS MCCB:
A fuse protects low-voltage electrical conductors and cables from short circuits and overloads. There are different types of fuses, such as type D, type DO, NV, cylindrical, etc. Various markings on a fuse or fuse link indicate important parameters, including the rated current In (e.g., 20A in Picture 1), rated voltage U (e.g., 500V ), and short-circuit capacity (e.g., 120kA). This article focuses on the meaning of the gG marking, specifically the significance of the letter g (as opposed to a), which indicates the tripping or current-time (I-t) characteristic of the fuse.
An important element in protecting people (as well as property and animals) from the effects of electric current is the grounding of a part - the point of the electrical power supply system (e.g., a 20/0.4 kV transformer station that supplies a facility) and the grounding of exposed conductive parts. An exposed conductive part (such as the casing of an asynchronous motor) is normally not live; however, in the event of a fault, if a phase conductor comes into contact with the casing due to a failure, it can be dangerous to touch.
Motor protection circuit breaker is a crucial component for protecting asynchronous motors from overloads and short circuits. To understand how the protection works, it's important to first understand the basic operation of an asynchronous motor.
We’re excited to introduce our Power Dissipation Configuration Tool, a user-friendly solution designed to optimize your electrical system performance. This tool enables engineers, designers, and installers to calculate power losses with precision, ensuring the safe and efficient operation of electrical installations.
Remote switching on and off of a three-phase asynchronous motor using push buttons enables efficient and safe motor operation from a distance. This method is widely used in industrial settings to enhance practicality and ensure safety in the workplace.
When designing low-voltage switchgear, many manufacturers follow guidelines from standards to create and market a product that meets all necessary requirements and ensures safety.
When it comes to solar energy systems, selecting the right components is not just a matter of efficiency—it’s a critical safety decision. Among the most essential components are electrical fuses, which protect systems from overcurrents and faults. Specifically, the debate between gPV fuses, designed for photovoltaic (PV) systems, and gG fuses, used in general electrical applications, often arises. While gPV fuses are more expensive, their design specifically addresses the unique challenges of solar energy systems, making them the safer choice.
The selectivity of protective devices is a crucial consideration when designing low-voltage installations. The goal of selectivity is to minimize the consequences of a fault. Only the faulty part of the installation should be disconnected, while the rest remains operational. Selectivity is achieved if the fault is cleared by the protective device closest to the fault without triggering other protective devices.
