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Few good tips for low voltage switchgear maintenance and care
Low voltage switchgear The low voltage switchgear involves many devices like power circuit breakers, MCBs, aux. relays, CTs, VTs etc.. Read more
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Should you choose fixed or withdrawable medium voltage switchgear?
Fixed or withdrawable medium voltage switchgear? How to make the right choice between fixed or withdrawable medium voltage switchgear when. Read more
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Power flow in MV radial network and calculation of voltage drop and loss
Power flow in radial network Symmetrical load In three phase system the load for each phase should be the same.. Read more
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7 typical layout designs of 11kV indoor distribution substation
11kV Indoor distribution substation The following layout designs of indoor distribution substation are typical only and should not be used. Read more
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Single line diagrams of emergency and standby power systems with automatic...
Emergency and standby power systems are generally designed into the over-all electrical system for one of the following two reasons: Legal Requirements – As required by the NEC, NFPA 101, NFPA 99......
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The analysis of four network schemes in terms of reliability and protection
Before sizing an electric network, the single-line diagram of the electric network must be defined on the basis of: Load – it is considered fundamental to establish the true user and service...
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Circuit breaker selections for low voltage installation (with discrimination)
The LV installation which forms the subject of this study is shown in figure 1 above. This study includes discrimination and coordination of protection between the LV equipment and the protection...
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4 medium voltage switching equipment for primary substation installations
This technical article covers the medium voltage switching equipment intended mainly for primary substation installations. The target is to give some basic knowledge and difference between 4 main piece...
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Three abnormal situations leading to an uncontrolled release of SF6 gas
This technical article deals with the assessment of risk to personnel in the case of an abnormal situation leading to an uncontrolled release of SF6 gas into the atmosphere. Generally , such... Read more
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System earthings and incidents on MV side that result in LV disturbances
Low voltage networks, unless a replacement uninterruptible power supply (with galvanic insulation) or a LV/LV transformer is used, are influenced by MV. This influence takes the form of: capacitive...
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MV network diagrams for feeding secondary switchboards and MV/LV transformers
Let’s take a look at the main MV network diagrams and structures used to feed secondary switchboards and MV/LV transformers. The complexity of the diagrams differs, depending on the level... Read more
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Main circuit breaker types from 1000 V MCB to 1000 kV dead tank breaker
This technical article discusses two important circuit breaker classifications – by voltage level (from low to medium and high voltage) and secondly by technology (extinguishing method or medium that...
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How to specify real service conditions for LV/MV equipment inside a substation
The various service conditions for the MV equipment inside substation are linked to the design of the installation, the design of the operating room, the site and the application surrounding... Read more
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Circuit configurations (single line diagrams) for HV and MV switchgear...
The starting point for planning a switchgear installation is its single line diagram. This indicates the extent of the installation, such as the number of busbars and branches, and also... Read more
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Design and Installation of Medium Voltage Switchgear (Facts You MUST Know)
When specifying and planning medium voltage switchgear for a substation, functions and influencing factors must be matched and an economically efficient solution must be found among the offerings of...
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The Most Important Tests For Medium Voltage Metal-Enclosed Switchgear (You...
The design of the insulation system for metal-enclosed switchgear is based upon life expectancy of about 30 years. However, environmental conditions such as dirt, moisture, and corrosive atmosphere can...
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Design of primary and secondary power distribution in car manufacturing...
When power supply systems for car manufacturing plant are planned, each individual problem can be faced in various ways: by means of technical solutions that feature specific technical advantages....
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MV/LV Power Substations Design and Schematics Notes (Network Supply and...
Early consultation with the local Electricity Distributor is essential for agreement on a mutually approved MV/LV substation to act as the intake point for a particular site. This consultation is......
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Current and voltage transformers (CTs and VTs) as protection’s eyes and ears
The CTs (current transformers) and VTs (voltage transformers) are provided in the plants to reduce the voltage and current values of the plant to values such as to be able... Read moreThe post Current...
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MV network diagrams for feeding secondary switchboards and MV/LV transformers
Let’s take a look at the main MV network diagrams and structures used to feed secondary switchboards and MV/LV transformers. The complexity of the diagrams differs, depending on the level... Read...
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