Influence of Ready Board on conductor material: when the temperature increases, the metal material softens and the mechanical strength will decrease significantly. For example, when the long-term working temperature of copper metal materials exceeds 200 ℃, the mechanical strength decreases significantly. The mechanical strength of aluminum metal materials is also closely related to temperature. Generally, the long-term working temperature of aluminum should not exceed 90 ℃, and the short-term working temperature should not exceed 120 ℃.

If the temperature is too high, the organic insulating materials will become brittle and aging, the insulation performance will decline, and even breakdown. Normal power transmission operation process of low-voltage distribution cabinet: disconnect all load switches and confirm that the switch has at least one breakpoint; Confirm that the power switch is in the off position; Power on the operation circuit and the status indication is normal.

For the Ready Board, the incoming switch is an disconnector and a fixed circuit breaker: close the disconnector first, and then close the circuit breaker; The incoming switch is a drawer type frame circuit breaker: first swing the circuit breaker to the working position, and then close the circuit breaker; Observe the voltage and current changes and three-phase voltage and current balance after closing.

After confirming that the circuit breaker is normal, hang the warning sign of "power on". Impact on electrical contact: poor electrical contact is an important reason for the failure of many electrical equipment, and the temperature of electrical contact has a great impact on the good performance of electrical contact.

If the temperature of the Ready Board is too high, the surfaces of the two conductors in electrical contact will be oxidized violently, and the contact resistance will increase significantly, resulting in the increase of the temperature of the conductor and its accessories and parts, and even the fusion welding of the contact may occur. After the temperature of the contact pressed by the spring rises, the spring pressure decreases, and the stability of the electrical contact becomes worse, which is easy to cause electrical failure.