Treatment of enameled wire feverIn general, enameled wire by bending or after elongation, film stress is produced. In this state, when the enameled wire and moisture, water, solvents, and chemicals, such as after contact, will appear fine cracks, resulting in a pinhole and peeling of the paint film. This phenomenon is called wet crack, and this phenome...
Inspection of cable bridges1. The power cable tray in front of the mobile should check whether the wire disc is strong;
2. Should be fixed on both ends of the cable, the coil not YingSongChi;
3. Sometimes due to cable long stored or improper safekeeping, line loss, and handling is easy to cause cable operation or loose coil cannot pay-off, the coil shoul...
Cable laying methodPower cable laying way, not at the same time, should choose different cable directly buried installation with an armored and anticorrosive layer of the cable should be used, indoors, ditch and tunnel laying cable should be used in flame retardant or non-flame retardant crosslinked polyethylene armored cable, ensure no external me...
Cableway wear-resistant tube
1. In a cable with explosive dangerous location Ming fu, above ground level ground cable should be protected, underground cable and cross roads, railways, wear tube should be adopted.
2. Underground cable through the building, the square section, cable laying in the plan will serve as a road location, appropriate is use...
Eliminate the cable insulation retractionIn order to guarantee the normal operation of the crosslinking cable accessories, must be the attachment of cable in the construction process to take necessary measures to eliminate the influence of insulation retraction.1. heat straightening. The heating straightening process is also a process of eliminat...
Find the fault point of the cableRunning often appears high resistance grounding cable when the lack of instruments, generally high impedance fault first burn through to low resistance fault by using the method of the bridge for cable fault point.If an alternating, due to cable capacitance is large, the capacity of the equipment is large, in addition, the...
Quality inspection according to supply and demand1. The first testThe production party (supplier) is called the first party. The first party inspection means production enterprises for their own production of inspection of the products. The first inspection is actual production.
2. The second-party inspection
Using party (customer, the buyer)...
Oil-filled cable breakdown strength test sampleBreakdown strength test: 1. The power cable oil into oil cup has standard electrodes (electrode is 25 mm in diameter, spacing of 2.5 mm, axis alignment of these two electrodes, and maintain a level, oil standard capacity of not less than 250Cm3, an electrode from the oil level of oil painted and n...
1. Large current carrying capacity; irradiated cross-linked cable, after irradiation by high-energy electron beam, the molecular structure of the material changes from linear to three-dimensional network structure, and the temperature resistance level is increased from 70°C to 90°C, 105 in non-crosslinking. °C, 125°C, 135°C, or even 150°C...
Rough diagnosis of accidents and accident points based on the nature of the line protection actionAnswer: the line protection action can reflect a certain amount of the fault nature and scope, is briefly described as follows:
(1) if the current instantaneous fault protection movement, the nature of the fault is more serious, and occurs in the line hea...
