• What is the difference between residual current transformer and zero sequence current transformer?

    What is the difference between residual current transformer and zero sequence current transformer?

    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

    12-08-2021 News
  • What are the most common problems with relays

    What are the most common problems with relays

    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

    06-08-2021 News
  • What role does current transformer play in our daily life?

    What role does current transformer play in our daily life?

    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

    27-07-2021 News
  • What are the structural characteristics of the micro current transformer

    What are the structural characteristics of the micro current transformer

    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

    27-07-2021 News
  • What are the precautions for the use of relays?

    What are the precautions for the use of relays?

    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

    14-07-2021 Industry News
  • The technical requirements and main parameters of the relay

    The technical requirements and main parameters of the relay

    1. Mechanical physical parameter requirements:Ensure the use and installation size, weight, tightness, strength and solderability of the lead pins of the product. Including: contact pressure, contact gap, contact tracking, restoration reed pressure, armature stroke, nail height and other mechanical... read more

    09-07-2021 Industry News
  • What is the current transformer used for?

    What is the current transformer used for?

    A current transformer is a device used to measure alternating current. For example, in the process of power generation or transmission, the alternating current of different equipment can be converted into the required current of tens of amperes to tens of thousands of amperes. It can not only monito... read more

    25-06-2021 News
  • What is the background technology of manganin shunt?

    What is the background technology of manganin shunt?

    Manganese-bronze shunt is a precision resistance element used to make high-level measurement voltage, current, bridge, potentiometer and other instruments and meters, and it is more suitable for making standard resistor elements for reference. The manganese-copper shunt (manganese-copper sampling r... read more

    18-06-2021 News
  • What is the working principle of a current transformer?

    What is the working principle of a current transformer?

    A current transformer is an instrument that converts a large current on the primary side into a small current on the secondary side based on the principle of electromagnetic induction. The current transformer is composed of a closed core and windings. Its primary winding has a few turns and is strin... read more

    11-06-2021 News