Few good tips for low voltage switchgear maintenance and care

July 17, 2016, 9:14 pm

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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?

August 21, 2016, 9:22 pm

≫ Next: Power flow in MV radial network and calculation of voltage drop and loss

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Fixed or withdrawable medium voltage switchgear? How to make the right choice between fixed or withdrawable medium voltage switchgear when. Read more

Power flow in MV radial network and calculation of voltage drop and loss

September 11, 2016, 9:14 pm

≫ Next: 7 typical layout designs of 11kV indoor distribution substation

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Power flow in radial network Symmetrical load In three phase system the load for each phase should be the same.. Read more

7 typical layout designs of 11kV indoor distribution substation

September 25, 2016, 9:25 pm

≫ Next: Single line diagrams of emergency and standby power systems with automatic transfer switch (ATS)

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11kV Indoor distribution substation The following layout designs of indoor distribution substation are typical only and should not be used. Read more

Single line diagrams of emergency and standby power systems with automatic transfer switch (ATS)

February 2, 2017, 9:18 pm

≫ Next: The analysis of four network schemes in terms of reliability and protection

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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... Read more

The analysis of four network schemes in terms of reliability and protection

March 23, 2017, 11:26 pm

≫ Next: Circuit breaker selections for low voltage installation (with discrimination)

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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 requirements these... Read more

Circuit breaker selections for low voltage installation (with discrimination)

April 13, 2017, 9:22 pm

≫ Next: 4 medium voltage switching equipment for primary substation installations

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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 located... Read more

4 medium voltage switching equipment for primary substation installations

May 21, 2017, 9:01 pm

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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 of MV switching... Read more

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Three abnormal situations leading to an uncontrolled release of SF6 gas

June 27, 2017, 9:20 pm

≫ Next: System earthings and incidents on MV side that result in LV disturbances

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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

System earthings and incidents on MV side that result in LV disturbances

June 29, 2017, 8:57 pm

≫ Next: MV network diagrams for feeding secondary switchboards and MV/LV transformers

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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 coupling, galvanic coupling and common... Read more

MV network diagrams for feeding secondary switchboards and MV/LV transformers

August 3, 2017, 11:39 pm

≫ Next: Main circuit breaker types from 1000 V MCB to 1000 kV dead tank breaker

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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

Main circuit breaker types from 1000 V MCB to 1000 kV dead tank breaker

September 5, 2017, 8:27 pm

≫ Next: How to specify real service conditions for LV/MV equipment inside a substation

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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 insulates... Read more

How to specify real service conditions for LV/MV equipment inside a substation

September 12, 2017, 9:57 pm

≫ Next: Circuit configurations (single line diagrams) for HV and MV switchgear installations

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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

Circuit configurations (single line diagrams) for HV and MV switchgear installations

January 21, 2018, 10:24 pm

≫ Next: Design and Installation of Medium Voltage Switchgear (Facts You MUST Know)

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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

Design and Installation of Medium Voltage Switchgear (Facts You MUST Know)

March 25, 2018, 10:57 pm

≫ Next: The Most Important Tests For Medium Voltage Metal-Enclosed Switchgear (You SHOULD Perform)

≪ Previous: Circuit configurations (single line diagrams) for HV and MV switchgear installations

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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 manufacturers.... Read more

The post Design and Installation of Medium Voltage Switchgear (Facts You MUST Know) appeared first on EEP - Electrical Engineering Portal.

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The Most Important Tests For Medium Voltage Metal-Enclosed Switchgear (You SHOULD Perform)

March 27, 2018, 11:01 pm

≫ Next: Design of primary and secondary power distribution in car manufacturing plants (BMW, VW…)

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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 shorten... Read more

The post The Most Important Tests For Medium Voltage Metal-Enclosed Switchgear (You SHOULD Perform) appeared first on EEP - Electrical Engineering Portal.

Design of primary and secondary power distribution in car manufacturing plants (BMW, VW…)

May 29, 2018, 9:41 pm

≫ Next: MV/LV Power Substations Design and Schematics Notes (Network Supply and Enclosure Types)

≪ Previous: The Most Important Tests For Medium Voltage Metal-Enclosed Switchgear (You SHOULD Perform)

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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. This... Read more

The post Design of primary and secondary power distribution in car manufacturing plants (BMW, VW…) appeared first on EEP - Electrical Engineering Portal.

MV/LV Power Substations Design and Schematics Notes (Network Supply and Enclosure Types)

June 10, 2018, 11:00 pm

≫ Next: Current and voltage transformers (CTs and VTs) as protection’s eyes and ears

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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... Read more

The post MV/LV Power Substations Design and Schematics Notes (Network Supply and Enclosure Types) appeared first on EEP - Electrical Engineering Portal.

Current and voltage transformers (CTs and VTs) as protection’s eyes and ears

June 19, 2018, 11:43 pm

≫ Next: MV network diagrams for feeding secondary switchboards and MV/LV transformers

≪ Previous: MV/LV Power Substations Design and Schematics Notes (Network Supply and Enclosure Types)

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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 more

The post Current and voltage transformers (CTs and VTs) as protection’s eyes and ears appeared first on EEP - Electrical Engineering Portal.

MV network diagrams for feeding secondary switchboards and MV/LV transformers

August 3, 2017, 11:39 pm

≫ Next: Main circuit breaker types from 1000 V MCB to 1000 kV dead tank breaker

≪ Previous: Current and voltage transformers (CTs and VTs) as protection’s eyes and ears

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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

The post MV network diagrams for feeding secondary switchboards and MV/LV transformers appeared first on EEP - Electrical Engineering Portal.