In modern society, even this short 5-minute power outage may cause incalculable losses.
Power supply reliability, It is an important index to evaluate the development level of power grid.
According to power industry standards, The power supply reliability planning target for the central city power supply area is≥ 99.999% .
This means that for each electricity user, the average power outage is no more than five minutes throughout the year. This pursuit of the ultimate reliability of electricity must ensure that every link of the power supply is accurate.
The dry type distribution transformer is the key power equipment of medium voltage distribution network Becomes particularly important.
How to help high-quality urban distribution network construction?
the dry type transformer bring answers.
1: Temperature rise monitoring
Overheating of the transformer is one of the key causes of the fault. Improper cable head installation will cause the operating temperature of the switch to be too high, accelerate the aging of the insulation material, and cause insulation accidents in serious cases.
Each CRT is equipped with a temperature indicator, with three sensors in LV windings. PT100 sensors are used for detecting maximum temperature of winding. Temperature indicator protects the transformer by output alarm or trip signal.
2. Overload capability
Varelen's dry type transformer can be overloaded up to 40% with a corresponding increase in impedance voltage and load losses providing that additional cooling fans are installed. Short-time overloads makes no difference to transformer as long as the maximum winding temperatures are not exceeded (depending on initial load and ambient temperature)
3. Fire safety
Varelen's transformer is purely made up of material that is flame-retardant and self-extinguishing. Internal arcing caused by electrical faults and externally flames will not result in any explosion or fire. As long as the fire is put out, the transformer will extinguish itself. This design has been approved in many countries for installation in populated buildings and other constructions. Many tests show that combustion residue does no harm to environment.
can meet the requirements of protection classes below:
4. Unleashing the power of digitalization
dry type transformers are positioned at each critical node in the energy grid, from power generation stations all the way down to industrial and private consumers – yet up until now, they were only perceived as “voltage transforming devices”. With the newly introduced Sensformer, the transformer has evolved into an info-hub.
Varelen provides an easy and safe entry platform for digitization, which can safely and quickly obtain asset status and operating data, and enhance the efficiency of asset management. Once the alarm is triggered, plenty of key data will be immediately pushed to operation and maintenance personnel. The Sensformer enables its operator to optimize the quality and speed of operational decisions. Predict and troubleshoot more flexibly, faster, and more efficiently, and even avoid failures completely.
Intelligent active operation and maintenance mode of equipment
Ensure continuous power supply, Efficiently help users to optimize the operation and maintenance cost of the whole life cycle, Comprehensively promote the intelligent management level of power distribution systems.
