Sitong cable "quality first, customer supreme principle” invite you to pay attention to today's new information.

The detection of wires and cables has always been an important part of the national standard wires and cables. The higher the quality inspection department within a wire and cable enterprise, the better the quality of wires and cables produced by this enterprise and the more trustworthy it is. The more stringent the quality inspection departments of the third party, the more conducive to the development of the industry.

The following are important indicators of several wires and cables, which are the most critical indicators of wire and cable
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1. Measurement of conductor DC resistance:

The conductor core of wires and cables mainly transmit electric energy or electrical signals. The resistance of conductor is the main index of its electrical performance. When AC voltage acts, the core resistance is larger than that when DC voltage acts because of skin effect and adjacent effect surface. However, when the eye frequency is 50Hz, the difference between them is very small. Now the standard stipulates that only the DC resistance or resistance of the core can be tested to exceed the standard. Some defects in the production process can be found through the inspection of the specified values, such as wire breakage or partial single-wire breakage; wire cross-section does not meet the standards; product length is incorrect, etc.

2. Insulation resistance test:

Insulation resistance is an important index reflecting the insulation characteristics of wire and cable products, which is closely related to the electrical strength, dielectric loss of the products, and the gradual deterioration of insulation materials under working conditions. For communication cables, too low insulation resistance between wires will also increase circuit attenuation, cross talk between circuits and long-distance power supply leakage on conductor cores, so it is required that the insulation resistance should be higher than the prescribed value.

3. Measurement of capacitance and loss factor:

When the voltage amplitude and frequency are constant, the capacitive current is proportional to the capacitance (Cx) of the cable. For UHV cables, the current of this capacitor may reach a value comparable to the rated current, which becomes an important factor limiting the cable capacity and transmission distance. Therefore, the capacitance of the cable is also one of the main electrical parameters of the cable. Through the measurement of capacitance and loss factor, various insulation deterioration phenomena, such as damp insulation, shedding of insulation layer and shielding layer, can be found. Therefore, capacitance and TANdel can be measured in both cable manufacturing and cable operation.

Sitong cable factory always adhere to the "quality first, customer supreme principle, the company's main products: low voltage PVC insulated cable&wire ,0.6/1-26/35kv XLPE insulated power cables,Control cables,concentric cable，Overhead insulated cables,General rubber sheath flexible cable,Rubber sheath flexible cable for mining,welding cables, Aerial Bundle Cable(ABC Cable), Service Drop(Single,duplex,triplex,quadruplex),AAC,ACSR,AAAC, Polyester enameled round copper wire,aluminum wire, steel core aluminum stranded wire Guy wire,Flame Retardant Cable,Fire Retardant Cable,Smoke halogen-free cable,etc.In addition,such as more than 20 varieties, more than 1000 specifications.And we have the capacity to design and produce all kinds of wires and cables according to your special requirements.We have CE, ISO 9001, UL, KEMA, SABS, TUV, DIN test report and type for acsr, AAC, XLPE insulated Power cable. We can produce wire and cable according to international standards: IEC, ASTM, BS, DIN, Sans, CSA or as customers requirement.