Careless maintenance and insulation damage
The insulating layer in the middle of the silicon steel plate is aging， the anchor bolt cover with the iron core is damaged， the iron core causes large vortex，ShamolinAdvantages and disadvantages of oil immersed transformer， resulting in heat， temperature rise， and the aging of the insulating layer is accelerated. The core insulation compressive strength of power transformer must be measured on time and accurately. If it is found that the insulation compressive strength is less than the index value， please remove and replace the anchor bolt cover or carry out insulation for the copper core cable.
ShamolinThe insulation of the through core anchor bolt clamping the iron core is damaged， resulting in a short circuit fault between the silicon steel sheet of the iron core and the through core anchor bolt;
(I) the distance between the external contour of kV and below dry-type transformer and the surrounding guardrail or courtyard wall shall take into account the convenience of transportation and repair of dry-type transformer， and the distance shall not be less than m; At the angle with actual operation， a spacing of more than m shall be reserved; If metal fence is selected， the metal fence shall be grounded and a warning sign shall be hung at a prominent position.
BrosadDeterioration damage of transformer core insulation
In the case of using dry-type transformer， customers must master the method of wiring. If there are problems in wiring， it is easy to cause common faults in application. So， what is the wiring mode of dry-type transformer?
The iron core of power transformer is made of high-quality crystallized hot-rolled ferrite core， which is stacked at the degree fully inclined multi-step interface. The surface is covered with epoxy resin adhesive cable sheath coating， which is resistant to corrosion and rust， and has sound insulation and noise reduction.
Operation and maintenance management of oil immersed transformer
Transformer manufacturers said that at this stage， China"s energy-saving distribution transformer market is relatively scattered， coupled with the constraints of factors such as low threshold in the field， uneven companies， lack of evaluation and specifications， and inadequate technical innovation， resulting in slow marketing of energy-saving transformers.
For the leakage that has already occurred， find the leakage point first which can not be ignored. For the position with serious leakage， shovel or sharp punch can be selected. The leakage point can be riveted with special tools for metal materials. After manipulating the leakage， the treatment surface shall be cleaned and tidy. Polymer composite materials are mostly selected for dry consolidation. After dry consolidation， the goal of long-term treatment of leakage can be achieved.
Work coursesIn relay protection dry-type transformer， the disconnection of the fault point is related to each other. In a word， it will affect the whole power circuit
The representative mode of connection group of dry-type transformer is: English capital letters indicate the wiring on the primary side (or primary side)， and English letters indicate the wiring on the secondary side (or secondary side). Y (or y) is star wiring and D (or D) is triangular wiring.
Note: in the whole process of safety patrol inspection， the on-site operation and maintenance management staff must use temperature tester or thermal imager to carry out purposeful inspection on the transformer itself，ShamolinTransformer Daquan， terminal block and other accessories; The sound during the operation of the transformer is a symmetrical current sound. If the sound is found to be abnormal， significantly expanded， or there is local sound， the load can be reduced or the operation of the transformer can be stopped.
What is the reason for the shutdown of power transformer?
packingAvoid aging and damage of power transformer iron core insulation: aging of iron core insulation or damage of waterproof sleeve holding anchor bolt will cause large vortex of iron core， and can be equipped with safety protective casing according to different waterproof grades. It is applicable to key or unique natural environment sites such as multi-storey buildings，ShamolinDistribution transformer video， commerce， airports， tunnel construction， chemical enterprises and factories.
ShamolinPower transformer factory
After the test， connect the data signal contact of the automobile relay with the alarm circuit the pull-in contact with the opening circuit， and adjust the overcurrent protection value.
The scientific research of power transformer oil is generally carried out according to the way of sampling. What are the common sampling methods and processes?
