relay power supply

Abstract

This utility model discloses a relay power supply, including a main control circuit. The main control circuit includes a switching power supply, an intermediate relay, a circuit breaker, and a fuse. The switching power supply is externally connected to the live and neutral wires of the power supply cable. A circuit breaker QF1 is installed on the live and neutral wires. An intermediate relay KA1 is installed on the live wire. The coil of the intermediate relay KA1 is connected to the TB terminal. The contacts of the intermediate relay KA1 are connected to the switching power supply PS1. Fuses FU1 and FU2 are installed at the output terminal of the switching power supply PS1. Thus, by adding a relay power supply at the previous station (not exceeding 200 meters), the next station (exceeding 200 meters) can be controlled. This utility model enables power supply to stations exceeding 200 meters.

Description

Technical Field

[0001] This utility model relates to a power source, specifically a relay power source. Background Technology

[0002] Currently, the power supply distance of the control cable from the monitoring center to the site can only be maintained within 200 meters. Beyond 200 meters, the power supply will be unstable.

[0003] According to Ohm's Law, in a closed circuit, current is directly proportional to voltage and inversely proportional to resistance. When current flows through a control cable, the cable's resistance causes a voltage drop. The longer the cable, the greater the resistance, and the more significant the voltage drop. Within a distance of 200 meters, the voltage drop caused by the cable resistance is within an acceptable range, ensuring sufficient voltage for the site equipment to operate normally. However, when the distance exceeds 200 meters, the increased resistance and resulting voltage drop may cause the voltage at the site equipment to fall below its normal operating voltage range, leading to unstable equipment operation.

[0004] As the power supply distance increases, in addition to the voltage drop caused by resistance, line losses also increase. Line losses mainly include conductor heating losses and insulation dielectric losses. In long-distance transmission, these losses cause some electrical energy to be converted into heat energy and dissipated, further reducing the effective electrical energy reaching the station equipment. When the distance exceeds 200 meters, line losses may reach a relatively serious level, resulting in insufficient power supply to the equipment, which in turn affects the normal operation of the equipment and leads to unstable power supply. Utility Model Content

[0005] To address the power supply issue for stations exceeding 200 meters in distance, this invention provides a relay power supply.

[0006] This utility model provides the following technical solution:

[0007] The relay power supply includes a main control circuit, which includes a switching power supply, an intermediate relay, a circuit breaker, and a fuse. The switching power supply is externally connected to the live and neutral wires of the power supply cable. A circuit breaker QF1 is installed on the live and neutral wires. An intermediate relay KA1 is installed on the live wire. The coil of the intermediate relay KA1 is connected to the TB terminal. The contacts of the intermediate relay KA1 are connected to the switching power supply PS1. Fuses FU1 and FU2 are installed at the output terminal of the switching power supply PS1.

[0008] Furthermore, the model number of the switching power supply PS1 is RSP-320-36V.

[0009] The output of the switching power supply PS1 is connected to the terminal, and the output of the terminal supplies power to the next relay power supply.

[0010] Compared with existing technologies, the advantages of this invention are as follows: The relay power supply includes a main control circuit, which comprises a switching power supply, an intermediate relay, a circuit breaker, and a fuse. The coil of the intermediate relay is connected to a terminal, and the contacts of the intermediate relay are connected to the switching power supply. An external live power cable is connected. When the circuit breaker is open, the coil of the intermediate relay will engage, the contacts will close, and the switching power supply will be energized to supply power to the station. The output of the switching power supply is connected to the terminal, and the terminal output can supply power to the next relay power supply, thus achieving a linkage effect. In this way, only one relay power supply needs to be added at the previous station (not exceeding 200 meters) to control the next station (exceeding 200 meters). This invention enables power supply to stations exceeding 200 meters. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the relay power supply of this utility model;

[0012] Figure 2 This is the terminal wiring diagram for this utility model. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] Please see Figure 1-2 The relay power supply of this utility model includes a main control circuit, which includes a switching power supply, an intermediate relay, a circuit breaker, and a fuse. The switching power supply is externally connected to the live wire and neutral wire of the power supply cable. A circuit breaker QF1 is installed on the live wire and neutral wire. An intermediate relay KA1 is installed on the live wire. The coil of the intermediate relay KA1 is connected to the TB terminal. The contacts of the intermediate relay KA1 are connected to the switching power supply PS1. A fuse FU1 and a fuse FU2 are installed at the output terminal of the switching power supply PS1.

[0015] The model number of the switching power supply PS1 is RSP-320-36V.

[0016] The output of the switching power supply PS1 is connected to the terminal, and the output of the terminal supplies power to the next relay power supply.

[0017] Assuming there is a forward station more than 200 meters away on site, you only need to add a relay power supply to the previous forward station less than 200 meters away to control the next station more than 200 meters away. The electrical cabinet is equipped with a switching power supply and an additional intermediate relay to connect the switching power supply. In addition, the fuse also plays a linkage role. If there is another relay power supply later, it can also be linked to the next one.

[0018] The coil of the intermediate relay is connected to the terminal (TB X1). After the contacts of the intermediate relay are connected to the switching power supply, an external live power cable is connected. When the circuit breaker is open, the coil of the intermediate relay will be attracted, the contacts will be closed, and the switching power supply will be energized to supply power to the station.

[0019] The output wires of the switching power supply are connected to the terminals, and the terminal output wires can supply power to the next relay power supply, thus achieving a linkage function. This utility model enables power supply to stations more than 200 meters away.

[0020] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A relay power supply, including a main control circuit, characterized in that: The main control circuit includes a switching power supply, an intermediate relay, a circuit breaker, and a fuse. The switching power supply is externally connected to the live wire and neutral wire of the power supply cable. A circuit breaker QF1 is installed on the live wire and neutral wire. An intermediate relay KA1 is installed on the live wire. The coil of the intermediate relay KA1 is connected to the TB terminal. The contacts of the intermediate relay KA1 are connected to the switching power supply PS1. Fuses FU1 and FU2 are installed at the output terminal of the switching power supply PS1.

2. The relay power supply according to claim 1, characterized in that: The switching power supply PS1 is model RSP-320-36V.

3. The relay power supply according to claim 1, characterized in that: The output of the switching power supply PS1 is connected to the terminal, and the output of the terminal supplies power to the next relay power supply.

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