500kva package power structures landscape buried box transformer substation

Outdoor prefabricated substation (European type)
Installation, use and maintenance
In addition to the regulations required by the power department, the following matters shall be paid attention to in the installation, acceptance, handover test, operation and maintenance of intelligent integrated substation:
♦ When receiving the goods, the user shall check carefully according to relevant regulations. For products that are not installed immediately, they shall be stored in appropriate places according to the provisions of normal use conditions.
♦ The product shall be lifted at the bottom with special spreader
♦ The product shall be placed horizontally on the prepared foundation, and then the gap between the product base and the foundation shall be plastered and sealed with cement mortar to prevent rainwater from entering the cable room, and the high and low voltage cables shall be connected through the bottom sealing plate of the high and low voltage room.
♦ Reliable grounding shall be done after the product is installed in place; Two main grounding terminals on the channel steel of the base of the power station, the neutral point of the transformer and the outer flange, and the pile head under the lightning arrester
The installation department shall be grounded respectively. All grounding shall share a group of grounding devices, and the grounding resistance shall be less than 4 ohms;
♦ After installation or maintenance, the following items shall be inspected and tested before putting into operation:
◊ whether the substation is clean;
◊ whether the operating mechanism is flexible;
◊ whether the on-off of main electrical appliances is flexible and reliable;
O whether the on-off of auxiliary contacts of electrical appliances is reliable and accurate;
◊ whether the meter and relay action are accurate;
◊ whether the transformation ratio and wiring polarity of instruments and transformers are correct;
◊ whether all electrical installation nuts are tightened and whether the installation is firm and reliable;
◊ whether the bus connection is good, and whether its supporting insulators and clamps are installed reliably;
◊ whether the setting value of the electrical appliance meets the requirements and whether the fuse core specification is correct:
◊ whether the contacts of main circuit and auxiliary circuit meet the requirements of electrical schematic diagram.
♦ repair
◊ all components in the product shall be maintained according to their respective technical requirements:
◊ if the selected transformer is oil immersed, oil sample analysis and inspection shall be carried out at least once a year as required;
◊ after 20 times of on load or 2000 times of no-load opening and closing operations of the high-voltage side switchgear in operation, the contact condition and the arc extinguishing device shall be checked
The degree of loss. In case of any abnormality, it shall be repaired or replaced in time;
◊ after the automatic tripping of low-voltage switchgear, the tripping cause shall be checked and analyzed, and it can be put into operation again after the fault is eliminated;
◊ the lightning arrester shall be subject to a preventive test every year before the thunderstorm season;
*The product is attached with packing list, certificate of conformity, installation and operation instructions, electrical wiring diagram, instructions for main components and equipment used in the product, and key