Equipotential terminal box role: to protect personal safety, prevent equipment damage, improve equipment reliability, simplify the wiring, connection: ground wire connection, equipment zero connection, protection elements connected to the power line connection, box ground.
A, role
1, the protection of personal safety: in the operation of electrical equipment, equipotential terminal box can ensure that the equipment inside and outside the metal parts of the potential difference between the safe range, reduce the risk of personal electric shock.
2, to prevent equipment damage: equipotential terminal box can make the potential difference between the metal parts of the equipment to maintain a small value, reduce the current flow within the equipment, reduce the possibility of equipment damage.
3, improve the reliability of equipment: equipotential terminal box can effectively reduce the failure rate of electrical equipment, improve the reliability and stability of equipment, to ensure the normal operation of the electrical system.
4, simplify the wiring: equipotential terminal box with perfect internal terminals, can simplify the wiring process of electrical equipment, reduce construction difficulties and costs.
Two, connection
1, grounding line connection: equipotential terminal box is equipped with an internal grounding line, used to connect the equipment for protective grounding. In the wiring, should ensure that the grounding wire cross-sectional area is large enough to meet the requirements of the equipment grounding resistance. At the same time, the grounding wire should be as short as possible to reduce the grounding resistance.
2, equipment zero connection: equipotential terminal box is also used to connect the zero line of the equipment to ensure that the potential of the internal components of the equipment is the same. In the wiring, should be used in accordance with national standards of the zero line, and ensure that the connection is reliable.
3, protection elements connected: equipotential terminal box is usually equipped with internal protection elements, such as fuses, leakage protector. In the wiring, should be in accordance with the instructions of the protective components for wiring, and ensure that the wiring is correct.
4, power line connection: equipotential terminal box power line should be connected to the equipment power line. In wiring, should ensure that the power line cross-sectional area is large enough to meet the equipment power requirements. At the same time, the power cord should be kept tidy to avoid damage to the cable.
5, box grounding: equipotential terminal box itself needs to be grounded to ensure that the box and the grounding system between the potential difference in the allowable range. In the wiring, the box should be firmly connected to the grounding line and grounding system.
Introduction of equipotential terminal box
Equipotential terminal box, also known as equipotential interconnection box, is a kind of protection device for electrical equipment. Its principle is in the operation of electrical equipment, the equipment inside and outside the metal parts through the wire connected to the equipotential terminal box, so that the potential difference between the metal parts and with the grounding system to maintain a small value, thereby reducing the risk of personal electric shock and the possibility of equipment damage.
In short, the principle of equipotential terminal box is to connect the internal and external metal parts of the electrical equipment, so that the potential difference between the parts and the grounding system to maintain a small value, to achieve personal and equipment protection. In practice, equipotential terminal box has been widely used in building electrical, power systems and other fields, to ensure the safe and stable operation of electrical equipment. Correct selection and installation of equipotential terminal box, for the maintenance of electrical equipment performance and protection of personal safety is of great significance.