Electrical installation engineering construction technology

Construction Program

General construction procedures:

Buried pipe, buried parts → equipment installation → wire, cable laying → loop connected → check, test, commissioning → power test run → delivery use

Oil-immersed power transformer

Unpacking inspection → Secondary handling → Equipment in place → Core inspection → Attachment installation → Oil filtering, oil injection → Insulation test → Handover test → Acceptance

Whether the oil-immersed power transformer needs a core inspection should be determined based on the size of the transformer, the manufacturer's specifications, storage time, and whether there is an abnormality in the transportation process.

Cabinet type vacuum circuit breaker

Vacuum Circuit Breaker Inspection → Operating Mechanism Check → Vacuum Circuit Breaker In Place → Mechanical and Electrical Performance Test

Oil circuit breaker

Unpacking inspection → Main body installation → Operating mechanism installation → Check, adjustment → Insulation test → Test

Isolation switch

Unpacking inspection → Main body installation → Operation mechanism installation → Adjustment

skills requirement

Installation regulations

The storage and storage period of the electrical equipment and equipment before installation shall be in accordance with the requirements of the manufacturer. The equipment and equipment shall be securely placed and shall not be damaged. The environmental conditions for safekeeping should include measures such as fire protection, moisture protection, and dust prevention.

Fasteners for installation of electrical equipment, should use galvanized products

After the transformer is installed in place, grounding terminals should be well grounded. The current transformer secondary coil that is not to be used temporarily should be short-circuited and then grounded. When installing a zero-sequence instrument transformer, pay special attention to the distance from the surrounding magnetic conductor or charged conductor.

The reactor is installed so that the winding direction of the coil meets the design requirements

Insulating oil should be strictly filtered and its electric strength, dielectric loss tangent, chromatographic analysis, etc. can only be injected into the equipment after passing the test.

Protective grounding and working grounding of electrical equipment must be reliable

Handover test

The main function of the transfer test is to determine whether the installation quality of the electrical equipment is qualified, and determine whether the equipment can be put into operation.

Handover test content

Measuring insulation resistance

The greater the insulation resistance, the better the insulation performance

DC withstand voltage test

AC withstand voltage test

The method of identifying the insulation strength of electrical equipment is an important measure to ensure the safe operation of the equipment. Through the test to grasp the insulation of the equipment, the hidden defects inside the insulation are discovered in time.

Insulation preventive tests are divided into two categories:

The non-destructive test or insulation characteristic test is a variety of characteristic parameters measured at a lower voltage or with other methods that will not damage the insulation, mainly including measuring the leakage resistance of the insulation resistance, the tangent of the dielectric loss, etc. In order to judge whether there is any defect inside the insulation

Destructive test or pressure test, the voltage applied in the test is higher than the working voltage of the equipment, and the insulation test is very strict, especially to expose those serious defects that are dangerous, and to ensure that the insulation has a certain degree of electrical strength , Including DC withstand voltage, AC voltage and so on. The disadvantage of pressure test is that ash can cause some damage to insulation.

Measuring Conductor DC Resistance

The smaller the conductor DC resistance, the better the conductivity

       Oil Mist Separator to solve the machine tool industry, the bearing industry, cleaning industry and those high-speed cutting industry in the production of fog control processing.This series of products USES the advanced oil mist separation technology, adopts the five-level filtration technology, the quick lock fastening maintenance and repair is convenient, adopts the reliable processing technology, creates the same kind of products in the fine, the performance is consistent with the import but the price is lower than the import price.

Working principle:

Centrifuge high-speed negative pressure produced by the rotation of the pollutants within the suction machine, after the first level stainless steel net coarse filter, filtering and then the secondary, tertiary, into the centrifugal fan, will play to the walls of water mist to form water, the remaining gas from behind again after secondary filtration, separation, purification processing and oil and air to separation, purification of air through the air hole, oil and water after a specified line.

Oil Mist Separator

Super mist separator

Xinxiang Sunrise CNC Bearing Equipment Co., Ltd. , https://www.cncsunrise.com