• Benefits of a Single Phase Relay

    Benefits of a Single Phase Relay

    Single-phase relay protection consists of a transformer and its load protection system. A single-phase relay has an output stepped by a control circuit that is normally a switching device such as a solenoid or a diode. This control is usually an alternating current source and controls the voltage t... read more

    26-09-2021 News
  • Mini Current Transformer - For Low Voltage Electrical Appliances

    Mini Current Transformer - For Low Voltage Electrical Appliances

    Great Electrical Co, Ltd. is an Official Partner of the Academy of Model Engineers (AMEA) which is an international organization for model engineers. It is one of the oldest and the largest electric model and transformer producers in China. Great Electrical Co, Ltd has been in business since 1830 ... read more

    26-09-2021 News
  • What is the difference between safety relay and general relay?

    What is the difference between safety relay and general relay?

    1. Larger appearance The dimensions of safety relays are different from ordinary relays, and safety relays are larger. 2. Modules instead of components The safety relay is a module, not an electronic component like an ordinary relay. 3. Color The safety relay has its own color, which is generally ... read more

    17-09-2021 News
  • Which is better, solid state relay or mechanical relay

    Which is better, solid state relay or mechanical relay

    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

    09-09-2021 News
  • What are the main factors affecting the current transformer error

    What are the main factors affecting the current transformer error

    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

    25-08-2021 News
  • What is the difference in the principle of action between a voltage transformer and a current transformer?

    What is the difference in the principle of action between a voltage transformer and a current transformer?

    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

    25-08-2021 News
  • Precautions for the selection and application of solid state relays

    Precautions for the selection and application of solid state relays

    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

    19-08-2021 News
  • 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