Oil immersed transformer is mainly composed of a circuit of high voltage switchgear busbar, transformer induction system, armored automation system, communication, remote control, measurement, capacitance compensation and DC power supply and other electrical units. The device in a damp proof, rust proof, dust prevention, fire prevention, anti-theft, and steel in heat insulation, all closed, mobile made the box body, mechanical and electrical integration, closed operation, mainly has the following features:
(1) a high degree of automation: Total Station Intelligent Maintenance System of substation planning, selection of inductive automation equipment, lax device can complete the "four remote", namely, telemetry, remote control, remote adjustment, each unit has independent operation function, protection function completely, can be set on the operating parameters of the distance. The box body temperature and humidity control and remote smoke alarm, satisfaction of unattended demand; according to the demand but also can complete the long-distance monitoring picture.
(2) advanced skills: choose the safe box some domestic leading skills and skills, shell usually use galvanized steel structure, selection of standard container materials and production skills, excellent anti-corrosion performance, ensure that the 20 years do not rust, transformer sealed plate selection Aluminum Alloy gusset plate, sandwich the use of fire insulation materials, the box body the air conditioning device and dehumidifying equipment, the transformer equipment does not operate by natural climate environment and external pollution, to ensure the normal operation of the -40 to +40 DEG C under the harsh environment.
(3) prefabrication: oil immersed transformer planning, as long as the planning personnel according to substation practice demand, make a box outside the main wiring diagram and equipment planning, can choose from manufacturers supply box and standard type, all the equipment in the factory, a device debugging qualified, true complete substation construction factory production planning, shorten the cycle; the field device only box positioning, cable box, contact wire cable connection, maintenance setting verification, transmission experiment and other debugging operations, all from the substation device to just about 5 ~ 8 days of operation time, greatly shorten the construction period.
The power transformer operation such as local fever, in many cases, no abnormal electrical, and the first show is abnormal oil and gas decomposition, which is decomposed into oil gas in local high temperature, gradually gathered in the transformer cover the upper and the gas in the relay. The difference between gas production and birth rate and gas production is in fact the difference between overheating faults.
First, light gas after the action. Light gas operation signal, sound signal should be stopped, and check how much gas in the relay, ascertain the reason.
1, non transformer fault reason. Such as: air inside the transformer (oil filter); oil level is reduced to below the gas relay (float gas relay) or oil level decreased dramatically (flapper gas relay); gas protection two circuit fault (such as water, gas relay terminal box terminal or the two cable short circuit etc.). If the action is determined as an external cause, after the signal has been restored, the transformer can continue to operate.
2, the main transformer fault reason. If you are not sure is due to external causes of gas signal action, also found no other abnormalities, should be input gas protection tripping circuit, while strengthening the monitoring of transformer, careful observation of the development.