- A practical novel electronic load-limiting automatic controller
Electronic load-limiting automatic controller (hereinafter referred to as the controller) applies to AC 50Hz, operating voltage AC22OV control circuits, so that the system according to a predetermined power supply. When the electrical load exceeds the specified range of values, the controller automatically cut off the load power. When the load is restored to the set power value, the load power can be automatically connected, thus realising the automatic monitoring and control of the electrical load. The appearance of the controller adopts the DZ47 similar structure, and with the DZ47 small circuit breaker parallel installation supporting the use of. The panel is equipped with light-emitting diodes to indicate the monitoring of the controller’s working status: when the indicator is green, it means that the load power supply is connected to the operating state; when the indicator is red, it means that the load has been cut off, and the load limiting controller has been started to work. Working Principle Due to the small external size of the controller, coupled with the small internal load, RC resistor-capacitor buck is used to provide power to the controller. The capacitance parameter values are mainly determined according to the internal load of the controller. The[Read More]
Date : 2025-09-08 - How to wire a counting relay
The counting relay is used for counting. When the counting value reaches the preset value, the contact will be operated and an output will be provided. 1. There are two power cables, the DC one is divided into positive and negative poles. 2. There are two counting inputs, one pulse counts one time. 3. at least one pair of count to reach output contacts (1 normally open, 1 normally closed) 4. There is a reset input. (Used to reset the counter count) Since we do not know the specific model and manufacturer, the wiring pin can not be determined. You can check the information according to the model number. Principle of operation of undervoltage disconnectors for circuit breakersA practical novel electronic load-limiting automatic controller
Date : 2025-09-08 - Principle of operation of undervoltage disconnectors for circuit breakers
The undervoltage striker is a coil with a strike foot in the centre that snaps onto the traction bar of the circuit breaker mechanism so that the mechanism is always unlocked, ensuring that it is impossible to store energy to close the circuit breaker. (Forcing an energy storage close at such a time would break the traction bar.) When the coil receives enough voltage, the striking foot is suctioned and exits the traction bar’s trajectory, so that the circuit breaker can be closed and divided normally. Automatic electronic load limiting controllerHow to wire a counting relay
Date : 2025-09-08 - Automatic electronic load limiting controller
Limit current controller: 1, the scope of application JSL integrated circuit fixed time limit current relay (hereinafter referred to as the relay), suitable for power network power supply lines, transformers, motors and other main equipment, and transmission and distribution systems as relay protection circuit appeared in the overload and short circuit protection. The product is a static multifunctional relay integrating start-up, delay, execution and signal indication, featuring high precision, low power consumption, accurate delay, high return coefficient, intuitive and convenient adjustment, large contact capacity, no need for independent operation power supply, etc. The product is suitable for overload and short circuit protection in power network supply lines, transformers, motors and other main equipment and transmission and distribution systems. The application of this product especially solves the compressed time level difference countermeasures requirements of the Ministry of Electric Power, overcomes the fatal weakness of the anti-time limit AC operation protection device and the fixed time limit protection of the power grid, and avoids the protection of the user’s faults caused by the overstep tripping and thus expanding the accident; the fixed time limit protection using the digital switch setting value, eliminates the original anti-time limit characteristics of relay in the fixed[Read More]
Date : 2025-09-08 - Functions of moulded case circuit breaker accessories
Moulded case circuit breaker has many kinds of auxiliary accessories, usually the most used is the shunt release, under-voltage release, these two are external accessories, need to be installed into the moulded case circuit breaker inside, moulded case circuit breaker itself with delayed release and instantaneous release function. Function of shunt excitation disconnector: it can control the circuit breaker opening from a distance. Function of undervoltage tripper: When the voltage is less than the rated voltage 70%-35%, the tripper will break the circuit breaker. Moulded case circuit breaker has many kinds of auxiliary accessories, usually the most used is the shunt release, under-voltage release, these two are external accessories, need to be installed inside the moulded case circuit breaker, moulded case circuit breaker itself with delayed release and instantaneous release function. Function of shunt excitation disconnector: it can control the circuit breaker opening from a distance. Function of undervoltage tripper: When the voltage is less than the rated voltage 70%-35%, the tripper will break the circuit breaker. Automatic electronic load limiting controller
Date : 2025-09-08
