by Dr. Jodie Rowe
Published 3 years ago
Updated 3 years ago
Main LV switchrooms will typically contain free standing switchboards and Motor Control Centres (MCC), along with auxiliary equipment required for the room to function (bus ducts & cable containment, distribution boards, lighting, small power, air-conditioning equipment, fire fighting, etc.).May 9, 2012
HV and LV stand for high and low voltage. HV / LV infrastructure refers to systems that deal with converting one electric current into another and changing the voltage when it reaches different areas and components.Jul 9, 2021
What is a LV panel?
Low voltage panel is a component of an electrical distribution system that divides an electrical power feed into branch circuits while providing a protective fuse or circuit breaker for each circuit in a common enclosure.
What is LV in substation?
A low-voltage network or secondary network is a part of electric power distribution which carries electric energy from distribution transformers to electricity meters of end customers. Secondary networks are operated at a low voltage level, which is typically equal to the mains voltage of electric appliances.
What is HT room?
HT means high tension or high voltage, where in a small current is used with a very high voltage(for creating plasma). LT means low tension where in a low voltage is used with very high current(for heating the resistive boats).
What are LV circuits?
In electrical engineering, low voltage is a relative term, the definition varying by context. Different definitions are used in electric power transmission and distribution, and electrical safety codes define "low voltage" circuits that are exempt from the protection required at higher voltages.
What is LT and HT panels?
HT Panel is like LT Panel except that it is used for high tension cables. LT Panel is an electrical distribution board that receives power from generator or transformer and distributes the same to various electronic devices and distribution boards.
What is LV and MV switchgear?
Thus, there are three main categories of switchgear as follows: High voltage (H.V.)switchgear. Medium voltage (MV) switchgear. Low voltage (LV) switchgear.
What is LV MV?
This document divides voltages into five classifications. These classifications can be combined into the categories below: High (HV), Extra- High (EHV) & Ultra-High Voltages (UHV) - 115,000 to 1,100,000 VAC. Medium Voltage (MV) - 2,400 to 69,000 VAC. Low Voltage (LV) - 240 to 600 VAC.
What are the 5 types of electrical loads?
Electrical Loads can be classified according to the nature of the load as follows:
Resistive Electrical Loads.
Capacitive Electrical Loads.
Inductive Electrical Loads.
Combination Electrical Loads.
What is Lt room?
LT (Low Tension) vs HT (High Tension)
High tension or HT supply is applicable for bulk power purchasers who need 11 kilo-Volts or above. Most small consumers of electricity like individual houses, shops, small offices and smaller manufacturing units get their electricity on LT connection.Jul 14, 2020
What is VCB breaker?
VCB stands for vacuum circuit breaker. This type of circuit breaker uses vacuum media for quenching the arc. In VCB vacuum is used because the dielectric strength of the vacuum is far better than any type of medium. The vacuum is the superior dielectric medium of extinct using the arc compared to other mediums.
What is PCC panel?
We are one of the eminent names, engaged in providing an array of Power Control Panels ( PCC ). Based on cutting edge technologies, this electrical control panel increases centralized control & maximizes safety for both the manufacturing process equipment and the workers.
Switchboards
In laying out the LV switchroom, actual switchboard dimensions should be used. Typical switchboard dimensions would be:
Room Dimensions
Clearances around switchboards should comply to local regulations. In the absence of other guidelines the following minimums can be used:
Environmental Category
IR1 (indoor) - good heat insulation, air conditioned; office, shops, etc.
See Also
Steven has over twenty five years experience working on some of the largest construction projects. He has a deep technical understanding of electrical engineering and is keen to share this knowledge. About the author
Incomer
The incomer feeds incoming electrical power to the incomer bus. The switchgear used in the incomer should have a main switching device. The switchgear devices attached with incomer should be capable of withstanding abnormal current for a short specific duration in order to allow downstream devices to operate.
Sub – Incomer
Next downstream part of the LV Distribution board is sub – incomer. These sub-incomers draw power from main incomer bus and feed this power to feeder bus. The devices installed as parts of a sub – incomer should have the following features
Feeders
Different feeders are connected to the feeder bus to feeds different loads like, motor loads, lighting loads, industrial machinery loads, air conditioner loads, transformer cooling system loads etc.
