Electromagnetic relays and solid state relays are one that is afraid of shock and the other is not afraid of shock; the former is afraid of magnetism and the latter is afraid of induced electricity; one is low in heat and the other is high in heat; one is low in price and the other is high in pric... read more
Due to the structure and material properties of the current transformer core, the current transformer has an exciting current Í0, which causes errors. The main factors affecting the current transformer error are (1) The influence of primary current. EBW shunt resistor When the primary current of ... read more
The main difference is that the working state is very different during normal operation, which is shown as follows:1) The current transformer can be short-circuited for the second time, but must not be open; the voltage transformer can be opened for the second time, but must not be short-circuited... read more
Commonly used solid state relays include HS, GTJ, JGW, KW, G3FD-×03SN, GZ1-L, G22-L, SZT036, JGJ, JGZ and other products. When selecting a solid state relay, first consider the type of solid state relay and adjust it with a load (the main technical guidelines include additional input voltage, inpu... read more
Residual current transformer: The residual current transformer is dedicated to the collection of residual current, and can be used in conjunction with electrical fire monitoring devices, motor protection devices and residual current relays. The product can output 0~5(2)mA or 0~1V for the second ti... read more
Relay (English name: relay) is an electrical control device, which is an electrical appliance that causes the controlled quantity to undergo a predetermined step change in the electrical output circuit when the input quantity (excitation quantity) changes to the specified requirements. It has an i... read more
The basic principle of zero sequence current maintenance is based on Kirchhoff's current law: the algebraic sum of the complex current flowing into any node in the circuit is equal to zero. When the circuit and electrical equipment are normal, the vector sum of each phase current is equal to zero.... read more
The miniature current transformer occupies an important position in the power supply system. Its basic structure is composed of iron core, primary winding, secondary winding, terminal and insulating support. The primary winding of the current transformer has few turns and is connected in series in... read more
1. Rated working voltage: refers to the voltage required by the coil when the relay is working normally. Depending on the model of the relay, it can be AC voltage or DC voltage. 2. DC resistance: refers to the DC resistance of the coil in the smart home relay, which can be measured by a universal... read more
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