Improved control circuit for power load control terminal

Abstract

The invention particularly discloses an improved control circuit for a power load control terminal. The improved control circuit comprises a load control terminal control circuit, an alternating current contactor control circuit, an intermediate relay and a normally-closed reset switch, wherein a main contact point and a normally-opened auxiliary contact of the intermediate relay are connected in parallel and then are connected to the load control terminal control circuit; the normally-closed reset switch is connected with the main contact of the intermediate relay in series; and the normally-closed auxiliary contact of the intermediate relay is connected to the alternating current contactor control circuit in series. The improved control circuit disclosed by the invention has the benefits that the intermediate relay accesses to the control circuit of the load control terminal and the alternating current contactor in a serially-connected way on the basis that original equipment of power users is not replaced, and thus the control effect is achieved. The improved circuit is simple in wiring construction process and is convenient for wiring; and the time is controlled within 45 minutes, so that the construction time is greatly shortened.

Description

[0001] technical field [0002] The invention relates to an improved electric load control terminal control loop. Background technique [0003] The power load management system is composed of a power load monitoring center and a power load management terminal installed in the power customer. Through the GPRS wireless communication channel, the power consumption status of the power customer is monitored, and according to the power grid load situation, the user is issued a stop and limit power order. By leading the control line through the negative control terminal to the client-side switch with electric control function, the purpose of "power limit to home" and "power limit without pulling the road" is achieved. [0004] The connection of the trip control circuit of the load control terminal must ensure that the client-side switchgear has a tripping function (electric control function), otherwise it will not be connected. At present, the equipment of most electricity custome...

AI Technical Summary

Problems solved by technology

However, the coil capacity of the AC contactor is generally above 2A, and the actual current of the negative control terminal is 1-1.5A. Long-term operation will cause damage to the negative control terminal.

Due to the mismatch of rated capacity, the negative control terminal cannot directly cooperate with the AC contactor on the client side to achieve the purpose of remote control tripping

If it is necessary to replace the air switch or AC contactor with tripping function one by one for customers, the company's current planned funds and manpower cannot meet the development of this work

Therefore, how to modify the tripping circuit will directly affect the tripping success rate

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