How to Install Internal Accessories on ETIBREAK NBS MCCBs

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:

• Auxiliary Contact Block (PS) – for remote indication of the breaker’s ON or OFF position.
• Signaling Contact Block (Trip Indicator) – for detecting when the breaker has tripped due to a fault.

Tripping Characteristics of NH Fuse-links – What Do gG, aM mean..

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.

IT Power Supply System in Relation to Grounding

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 MPE25 - Understanding the Tripping Characteristics

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.

Simplify Power Dissipation Calculations with ETI’s Power Dissipation Configuration Tool

 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 WITH PUSH BUTTONS

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.

Selected Requirements for the Design and Development of Enclosures for Low-Voltage Switchgear by ETI

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.

Why Are gPV Fuses the Safer Choice for Solar Power

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.

SELECTIVITY OF PROTECTION IN ELECTRICAL INSTALLATIONS: NH FUSE-LINK VS. MINIATURE CIRCUIT BREAKER

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.

TT Distribution System Regarding Grounding and Fault Protection

An important element in protecting humans (as well as property and animals) from the effects of electric current is the grounding of the system—this involves the grounding of the point of the electrical supply system and the grounding of exposed conductive parts.