Steve Bell

Electrical Switchboards – Overcurrent protection – overload, short circuit, discrimination and cascading Overcurrent Protection Overcurrent protection comes under two main categories, Overload protection and short circuit protection. Overload protection Overload protection aims to protect conductors from the thermal effects of passing more current than...

Here we will go through some of the commonly asked basic questions on electrical switchboards.     Switch board FAQs What does an electrical switchboard do? Essentially it does two things: 1) It divides up the power. In a switchboard you’ll normally have a...

AS/NZS 4777.1:2024 New Solar Standards The new AS4777.1 solar installation standards have dropped and there is a large impact for grid protection. The new standard AS/NZS 4777.1:2024 supersedes AS/NZS 4777.1:2016, while the existing 2016 edition will remain current for the six month transitional period,...

Discrimination & Selectivity Studies What is a discrimination study? A discrimination study in an electrical system is an analysis aimed at ensuring that protective devices (such as circuit breakers, fuses, and protection relays) operate in a coordinated manner. The main objective of this engineering...