What are the equipment used in substation?
The following equipment are installed in distribution substations:
- Distribution Transformer.
- Circuit breaker.
- Lightning Arrester.
- Air Break (AB) switches / Isolator.
- Insulator.
- Busbar.
- Capacitor Bank.
- Earthing.
What are the major equipment at traction substation?
Transformer, circuit breaker and interrupter are the major equipments in the traction substation.
Which supply used for control equipment in substation?
Using of DC supply instead of AC Supply in Substation also gives some extra facilities such as, 1. When protective devices are operating with DC supply they take very less reaction time than when they are operating with AC Supply.
Which traction system is best?
In case of heavy trains that require frequent and rapid accelerations, DC traction motors are better choice as compared AC motors. DC train consumes less energy compared to AC unit for operating same service conditions.
What kind of equipment is in a substation?
In a substation there are numbers of incoming and outgoing circuits each having its isolator, circuit breaker, transformers etc. connected to bus-bar system. These equipment are mostly static type. Safety and protection of equipment as well as working personnel is also a considerable factor.
How are instrument transformers used in a substation?
Instrument Transformer- Instrument transformers are used to step-down the current or voltage to measurable values. These are further classified into two types which are discussed below. CurrentTransformer – Current transformers are basically used to take the readings of the currents entering the substation.
How are DC interconnections used in a substation?
Distribution substations interconnect portions of the utility system distribution network and may include transformation between distribution voltage levels. DC interconnections are made with one of two specialized types of substations. These dc interconnections are not common and are much higher in capital cost than comparable ac interconnections.
How big are power transformers in a substation?
Large distribution substations have power transformers with a capacity as large as 100 MVA and serve as a source to as many as 10 distribution circuits. If the power transformers do not have automatic tap-changing underload equipment, it is usually necessary to install voltage regulators.