What is called a relay, a 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. When we ... read more
A power relay is a device that can produce a jump in one or more electrical output circuits when the input (or excitation) meets certain prescribed conditions, and can be used in a neutral point directly grounded system, as The directional element of zero sequence current protection. It has a wide ... read more
Locking refers to "self-locking", which automatically locks the state of the relay after it is energized and keeps the loop connected, even if the control current is turned off at this time, it will not change its state.That is to say, when the power is turned on and the control current is turned of... read more
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
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
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
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
Copyright © Zhejiang Great Electrical Co., Ltd. All Rights Reserved.
