Current relays The current relays are used as starting components for overload and short-circuit protection of generators, transformers and transmission lines. In other words, current relays are often used in automatic control circuits, which are actually smaller. Current to control the "automatic switch" of larger currents. Therefore, it plays the role of automatic adjustment, safety protection and conversion circuit in the circuit.
Classification of current relays
Electromagnetic current relay. Electromagnetic current relays are used as starting components for overload and short-circuit protection of generators, transformers and transmission lines. This relay is a mechanical current relay widely used in the last century and the beginning of this century. The relay is replaced.
Static current relay. The state current relay is divided into an auxiliary power supply and an auxiliary power supply. The product has high precision, low power consumption, fast action time, high return coefficient, intuitive and convenient setting, and wide range. The auxiliary power supply provided is 85-265V AC/DC universal, and the setting range is 0.1-99.9A or 0.1-9.99A;
The working principle of the current transformer is that the magnetic field is generated after the coil is energized, and then the contact piece is sucked in, so that the circuit path can achieve the purpose of protecting the circuit. The general connection is that the two wires of the coil are one positive and one negative, one of which is connected to the switch. The other wires are connected to the appliance.
Current Relay Common Model 1, DL Series Current Relay, which is mainly used in the overload and short circuit protection circuits of motors, transformers and transmission lines as the starting element.
DL current relay wiring diagram
2. JDL listed relays are static current relays used as starting components in overload and short circuit protection devices for generators, transformers and transmission lines.
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