Protection equipment in substation. Electrical Substation: Equipment, Types, Components & Functions

In this way, the output voltage is held roughly constant. Show related SlideShares at end. High conductivity. For long distance transmission line at higher voltages, steel towers are invariably employed. Isolator 7. The schematic arrangement of an attracted armature type relay. Share Email.

 

Lightning arrester is a most important protective device of distribution substation to protect valuable equipment as well as working personnel. It arrests and discharges over voltage to earth during lightning strokes. These are installed between line and earth near equipment.It is the current which the fuse element can normally carry with over heating or melting.

 

banbangcap.online › Technical Articles.Without reliability the protection would be simple rendered largely ineffective and could even become a liability.

 

PPEs Required to Enter a Substation · Hard hats (with full/partial brims as necessary) · Safety glasses with side shields · Face masks/shields.Earthing leads are the link, which provides connection between the earth conductors and the earth electrode.

 

Inside you find the brains of the station Protective relays that constantly monitor lines and equipment, keeping track of many voltages, currents, temperatures.In this system, only one additional breaker will be needed, thus its cost in comparison to single bus bar system will not be much.

 

banbangcap.online › article › study-protective-devices-distribution-s.And a fault condition the low resistance element blown out and the high resistance element reduce the short circuit current and finally breaks the circuit.

 

Equipment applied to electric power systems to detect abnormal and intolerable conditions and to initiate appropriate corrective actions. These devices include.As the fault in the equipment in the supply system leads to disconnection of supply to a large portion of the system.

 

Protection devices protect the transmission lines, generators, transformers and other electrical equipments from various “faults”. 6. Faults Types of “.Current Transformer C.

 

Substations generally have switching, protection and control equipment and one or more transformers. In a large substation, circuit breakers are used to.Pole mounted substation.

 

one occurs and protect the power network as well as the primary equipment. Protection should detect and isolate the faulty equipment as quickly as possible.It is the r.

 

High-energy transients or faults cause failures in low voltage substation equipment such as solid-state relays, remote terminal units, or communication.The following parts are important point which must be kept in view while laying out a substation.

 

Substation Protection forum? The faulted circuit is switched out of service automatically and de-energized, protecting the remaining portion of the.Books Baxter, H.

 

If line voltage is 66KV, then voltage across the secondary will be V.

 

In some case isolators are used for breaking charging currents of x-mission lines, Isolators are used in addition to circuit breakers while opening a circuit.

 

Advantage of High rupturing capacity H.

 

There are two principle reasons for it firstly if the fault is not clear quickly.

 

The space within the body Surrounding the element is completely packed with a filling powder.Forum Protection equipment in substation

 

RCC poles have greater mechanical strength, longer life and permit longer spans than steel poles; they require little maintenance and have good insulating properties.

 

When a failure occurs on any part of the system it must be quickly detected and disconnected from the system.

 

Phase advancers are used to improve the power factor of induction motors.

 

Over voltage relay.

 

Circuit Switchers are different from the circuit breakers.

 

Major electrical equipment in power plants.

 

Reliability: It is the ability of the relay system to operate under the pre-determine conditions.

 

Disconnector mechanisms incorporate a set of auxiliary switches for remote indication of disconnector position, electrical interlocking and current transformer switching for busbar protection.

 

The maintenance cost of this system is comparable with the single bus bar.

 

GI pipes shall have a minimum diameter of 50mm Copper plates shall not be less then mm, in size, with 6mm thickness.

 

Relays automatically operate their contacts to properly identify the source of trouble and remove it from the electrical system.

 

De-energising equipment risky in few casesmaintaining prescribed clearances and remote operations wherever possible are bound to ensure safe working conditions.

 

This type of fuse has a low —breaking Capacity and hence cannot be used in circuit of fault level.

 

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For regular maintenance also, one of the bus bar is required to be de-energized.

 

Types of line insulation : a.

 

The reader may further discussion on underground substation.

 

Isolator 7.

 

They are cheaper then other circuit interrupting devices of equal breaking capacity.

 

When the fuse blow under fault condition the tripping device cause the circuit breaker to operate.

 

Major electrical equipment in power plants.

 

forum? Under normal operating conditions, the current through the relay coil in such that the beam is healed in the horizontal position by the spring.

 

forum? It serves to provide adequate protection against hazards of different severity levels that personnel are likely to be exposed during their routine jobs at the substation.Forum Protection equipment in substation

 

forum? Similarly, if current in the line is 50A, then secondary of C.

 

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Low melting point.

 

It is the current which the fuse element can normally carry with over heating or melting.

 

Phase advancers are used to improve the power factor of induction motors.