This type of cable usually consists of 4 cores. Among them, the cross-sectional area of 3 cores is 95mm², and the cross-sectional area of the other 1 core is 70mm².
Generally speaking, the three 95mm² cores correspond to phase A, phase B, and phase C respectively, and are used to transmit the current of different phases in a three-phase alternating current system. The 70mm² core is usually used as the neutral wire (N wire), which provides a current loop in cases such as three-phase imbalance to ensure the normal operation of the system.
Application Scenarios
It is mainly applied in a three-phase four-wire power transmission system and is commonly found in industrial plants, commercial buildings, and some places with high requirements for power supply.
It can meet the power needs of high-power equipment. For example, it can effectively distribute the three-phase power to various electrical equipment such as large motors and transformers.
Characteristics
Strong Current Carrying Capacity: The 95mm² core has a large conductive area and can carry a large current. Generally, it can meet the long-term load current transmission of several hundred amperes. The specific current-carrying capacity is also related to factors such as the cable material, laying method, and ambient temperature.
High Power Supply Reliability: The structure of the three-phase four-wire system can ensure that when the three-phase load is unbalanced, the current can be balanced through the neutral wire, enabling the system to operate stably and reducing the risk of voltage fluctuations and equipment damage caused by load imbalance.
Good Voltage Stability: It can effectively transmit electrical energy and reduce the voltage drop on the line, ensuring that the voltage at the electrical equipment terminal is stable within the allowable range, thus ensuring the normal operation of the equipment.
Materials and Performance
Conductor Material: Copper or aluminum is usually used as the conductor material. Copper conductors have advantages such as good electrical conductivity, high mechanical strength, and corrosion resistance, but the cost is relatively high. Aluminum conductors have the characteristics of light weight and low cost, but their electrical conductivity and mechanical strength are slightly inferior to those of copper conductors.
Insulation Material: Insulation materials such as cross-linked polyethylene (XLPE) are generally used.XLPE-insulated cables have higher heat resistance, moisture resistance, and electrical insulation performance, and are suitable for higher voltage levels and harsher working environments.
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