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Insulating oils for general application which are covered by this specification are manufactured from predominantly naphthenic base crudes. Distillates from these crudes may be acid refined, hydrogen treated, solvent extracted, or processed by other suitable refining methods to yield acceptable mineral insulating oils which meet the test requirement at the point of delivery. Oils from paraffinic crudes may also be covered by this specification with the exception of performance at low temperatures. Other requirements may be needed for these products to ensure proper function at low temperatures. The use of all additives must be identified. An additive is a suitable chemical substance which is deliberately added to a mineral insulating oil to improve certain characteristics. Uninhibited oils must be free of additives, either natural or synthetic that are used to improve oxidation stability. This includes but is not limited to 2,6 ditetiary-butyl phenol, 2,6 dietertiary-butyl cresol, or metal deactivators such as benzotriazole and its derivatives.
Inhibited oils are insulating oils which have been supplemented with either 2,6 ditetiary-butyl phenol or 2,6 dietertiary-butyl cresol or any other specified and acceptable oxidation inhibitor. If an additive other than 2,6 ditetiary-butyl phenol or 2,6 dietertiary-butyl cresol is used, appropriate limit values for oxidation stability tests (those for Type I or Type II oils) should be agreed to by the purchaser and seller. If more than one additive is used, the more stringent limits for oxidation stability, those for the Type II oils would apply.
Pour point depressants, gassing tendency improvers, additives for corrosive sulfur and static electrification (metal passivators), antifoaming agents and other additives
All additives should be specifically identified or at a minimum identified by class of compounds such as metal passivator if the specific information is proprietary. Insulating oils covered by this specification shall be produced from proven crudes by suitable refining techniques, both of which shall have been approved by the purchaser. After such approval, no change in crude source, processing, or refining methods shall be made that results in a substantial change in the product characteristics without the prior approval of the purchaser.
Shipping containers should be dedicated to new transformer oils. The shipping method and containers shall be agreed upon by purchaser and seller and shall not be changed without prior approval of the purchaser.
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What is the maximum allowable operating temperature of an oil-filled transformer?
For a transformer 50 degree c is stable. In most transformers if temp rises above 60 an alaram will sound ,if above 90 trip off. a temp controller which will measure the oil temp will do this actions.
Can you insulate above an LED downlight?
This information should be in the documentation that came with your light but...Since most of the energy used in an LED is given out as light (as opposed to an incandescent bulb, which uses most of it's energy as heat) it is probably OK to insulate above it. However the transformer pack may still get hot during operation, so for a particular fitting you are better off to check the manufacturers specification before taking any chances.
Why line voltage at the secondary of transformer is above the required value?
ewan ko...................... ikaw ba alam mo
What are the functions of Breather Conservator and Ventpipe?
A conservator is an oil tank, located above the transformer, whose function is to ensure that the oil level remains above the transformer, while allowing it to expand and contract with temperature. The breather/vent pipe allows air to be displaced from the conservator when the level rises, and to draw back in when the oil level falls.
Does a 600 watt garden lights transformer pull 600 watts all the time or just the load from the lights you have on it?
Watts are power. If the lights were mostly or totally switched off, you'd have a circuit generating 600W of heat somewhere if the transformer still took 600W, not only that, but when you switched on, the 600W that the transformer was consuming, would not disappear, so the total drain would be 1.2kW. ---- Don't understand the above answer. The 600 watts on the transformer nameplate is the maximum amount of wattage that the transformer can produce and still be within its safety limits. It doesn't draw that wattage all the time. If you had two 50 watt lamps connected to the transformer then the transformer has the capacity of 500 watts left. The transformer will only produce the wattage that the load requests. The transformer has the ability to supply twelve 50 watt bulbs. 12 x 50 = 600. Any more bulbs than 12 and the transformer is in an overload condition.
Can i Over load an oil filled transformer?
Any transformer can be overloaded by applying a load above the capacity rating of the transformer.
When testing the ammeter fuse OL on the display screen means the fuse is?
Okay Below recommended specification Above recommended specification Blown
What is 132kv tower height?
the general height is 25-27mts,the first conductor is placed 17mts above the ground and rest of conductors placing 1st-2nd is 3.1mts and 2nd-3rd is 2.6mts
An example of attending to detail in a form is?
all of the above
When 2 power transformers are operated in parallel what would be the net capacity Is it less than the total capacity of above transformer?
iT is above Transformer because The Two power Transformers are operaTed iT for The same shape buT cuT in half
What of the above reaction?
This cannot be answered. You will have to give me more detail.
What size cable to use for an AC transformer so that it runs twenty four hours a day?
The Transformer rating should be well above the total running load of the house
A transformer is a device used to increase or decrease dc voltage?
The answer below this is not correct, a transformer can only be used on AC not DC. So the statement, "A transformer is a device used to increase or decrease DC voltage" is false The above comment relates to an entry which was obviously deleted. However, the above comment is also false. The ignition coil in of a petrol engine is a transformer, a pulse transformer. It's d.c. which passes through the primary, not a.c. <<>> A: this is a passive component as opposed to a device that is active answer is yes it does that but more importantly it isolates and match in/out impedance's
What is the maximum allowable operating temperature of an oil-filled transformer?
For a transformer 50 degree c is stable. In most transformers if temp rises above 60 an alaram will sound ,if above 90 trip off. a temp controller which will measure the oil temp will do this actions.
Is the turns ratio of transformer the same as the ratio of voltages across the transformer.why or why not?
plz give me answer the above question
Can you insulate above an LED downlight?
This information should be in the documentation that came with your light but...Since most of the energy used in an LED is given out as light (as opposed to an incandescent bulb, which uses most of it's energy as heat) it is probably OK to insulate above it. However the transformer pack may still get hot during operation, so for a particular fitting you are better off to check the manufacturers specification before taking any chances.
What is the percentage load at which maximum efficiency occurs for the single phase transformer?
For a single-phase transformer, maximum efficiency typically occurs at around 50-70% of the rated load. Operating the transformer at this load range minimizes losses and improves efficiency. Going below or above this range can decrease efficiency and increase losses in the transformer.
