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Home » HV Earthing

HV Earthing

28/06/2019 By Ian Leave a Comment

Low Voltage & High Voltage Earthing Protection – A Case Study at an EFW Plant

High Voltage Earthing Protection – A Case Study at an EFW Plant

In the context of electrical earthing or grounding. Earthing Protection defined as the Protective Earthing of electrical installations at low voltage, i.e. <1,000V AC as described in Electrical Earthing Standards BS 7430.

So, in this case, study. We take a look at a few challenges we came across while designing the HV Earthing and Lightning Protection Systems. For a 9MW Energy from Waste Plant in Europe. 

[Read more…] about Low Voltage & High Voltage Earthing Protection – A Case Study at an EFW Plant

Filed Under: Electrical Earthing Tagged With: BS 7430, BS 7671, BS EN 50522, bs en 62305, BS EN62305, BS7430, High Voltage Earthing Protection, HV Earthing, HV Earthing Protection, LV earthing, LV Earthing Protection, Protective Earthing

15/10/2018 By Ian Leave a Comment

How to Size High Voltage Earthing HV Conductors Correctly

high voltage earthing

The correct sizing of high voltage earthing (grounding) conductors is crucial for the safe and efficient operation of any electrical system. The size of the grounding conductor should be determined based on the maximum fault current that the system is likely to experience. As well as the voltage level and the type of earthing system being used.

In general, the grounding conductor should be sized to carry the maximum fault current for a specified duration without overheating or causing damage to the conductor or surrounding equipment. This can be determined using industry-standard calculation methods and guidelines. Such as those provided by the National Electric Code (NEC) or the International Electrotechnical Commission (IEC).

What size conductors should I use?

There a simple table I can use for this HV high voltage earthing design project. These are great questions and often asked. This post answers these questions together with the choice of conductor materials and jointing method within a high voltage earthing design project.

Assessing conductor size is entirely dependent on the electrical configuration and the load that the conductor must take. For example, an above-ground bonding conductor serves to transfer current with minimal voltage drop, from A to B. A directly buried conductor has an additional purpose. That of leaking the fault current or voltage into the local geology (as part of an electrode).

[Read more…] about How to Size High Voltage Earthing HV Conductors Correctly

Filed Under: Earthing System Design Tagged With: high voltage (HV), High Voltage Earthing, HV Earthing

03/09/2017 By Hugh Leave a Comment

Your Standard Earthing Design – Are They Valid Anymore?

Standard Earthing Design

A number of organisations across the UK recommend a standard earthing design when building smaller scale substations. The key driver behind these is one of cost. Nobody wants to pay more than they have to. For an HV connection using a templated approach to meet Earthing Standards compliance kind of makes sense – or does it?

So, the question is – does installing a standard earthing design meet your obligations under the Electricity at Work regulations?

[Read more…] about Your Standard Earthing Design – Are They Valid Anymore?

Filed Under: Earthing System Design Tagged With: BS EN 50522, BS EN 50522-2010, earthing design, earthing standards, Electrical Earthing System Design, HV Earthing, HV Earthing Protection

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