What is transformer ventilation?
The ventilation shall dispose of the transformer full-load heat losses without creating a temperature rise that is in excess of the transformer rating. Transformers with ventilating openings shall be installed so that the ventilating openings are not blocked by walls or other obstructions.
Can dry-type transformers be installed without an enclosure?
For dry-type transformers, the core/coil assembly (without enclosure) will usually have mounting and terminal dimensions to suit your enclosure requirements. The enclosure should give protection to the coils and have adequate clearance and sufficient ventilation openings.
How far off the wall does a transformer need to be?
Transformers should be located at least 12 in. to 18 in. away from walls and other obstructions that might prevent free circulation of air through and around each unit, unless the unit is designed for wall mounting and installed per the manufacturer.
Do storage rooms need ventilation?
The main purpose of storage rooms is – providing of climatic and other conditions for storage of food and non-food products. An important condition for this is existence of necessary microclimate, reliable ventilation and air conditioning systems in the premises.
What is cooling of transformer?
Cooling of a transformer is the process of dissipation of heat developed in the transformer to the surroundings. The losses occurring in the transformer are converted into heat which increases the temperature of the windings and the core. In order to dissipate the heat generated cooling should be done.
How many types of transformers are cooling?
The various coolants used for the cooling purpose of the transformer are air, synthetic oils, mineral oils, gas, water. Basically, there are two types of transformer one is the dry type, and another one is oil-immersed type.
What are the requirements regarding ventilation?
The required minimum ventilation airflow at the space can be provided by an equal quantity of supply or transfer air. At the air-handling unit, the minimum outside air must be the sum of the ventilation requirements of each of the spaces that it serves.
What are the minimum requirements of lighting and ventilation of room area?
One-tenth of the floor area excluding doors for dry hot climate. ii. One-sixth of the floor area excluding doors for wet/hot climate. No portion of a room should be assumed as lighted if is more than 7.5m away from the door or window which is taken for calculation as ventilating that portion.
What are the ventilation requirements for Ergon substations?
Substation Ventilation Requirements – Ergon. Substations require special attention to ventilation in order to dissipate heat losses from electrical equipment. Wherever possible, natural air flow to the outside of the building will be used. Forced ventilation should be used where natural ventilation is not practicable.
What are the requirements for ventilation ducts in a substation?
Substation ventilation ducts must not contain other services, give access to other portions of the building or form part of the ventilation system for the building. The strength and fire rating of the walls of ventilation ducts are required to be the same as those specified for substation walls where fire dampers are not installed.
What are the requirements for a good electrical substation?
Inlet and outlet openings should preferably be clear of pedestrian areas and must be located to prevent entry of noxious gases such as vehicle exhausts, pollutants such as smoke, soot, dust, ash etc. Air being removed from an internal substation must be directly and independently ducted to outside air.
What are the noise regulations for fans and substation ventilation?
Fans audible noise level must not exceed 41dB at a distance of 1metre from the source. Substation ventilation ducts must not contain other services, give access to other portions of the building or form part of the ventilation system for the building.