CN205881836U - Electronic type time relay switching -on device that delays - Google Patents

Abstract

The utility model discloses an electronic time relay delay closing device, which belongs to the technical field of low-voltage electrical safety equipment, and comprises a base (101) and an electronic time relay fixed on the base (101). The electronic time relay is set as Two, set two terminal blocks on the base (101), namely terminal block A (104) and terminal block B (105), the terminals of terminal block A (104) and the terminals of terminal block B (105) are connected correspondingly, The terminal block A (104) is connected with the electronic time relay by wires, and the terminal block B (105) is respectively connected with the power supply and the closing button; the utility model can automatically close the switch and transmit power, improve the efficiency of power transmission, and improve the reliability of power supply; The utility model judges whether the low-voltage main switch is reliably tripped, and then performs automatic reclosing or non-automatic reclosing, so as to avoid affecting users and distribution station equipment, and avoiding accidents.

Description

Electronic time relay delay closing device

technical field

The utility model belongs to the technical field of low-voltage electrical safety equipment, and specifically relates to an electronic time relay delay closing device with automatic reclosing function when the low-voltage main switch of a distribution transformer is disconnected after voltage loss.

Background technique

The tasks of equipment operation and maintenance management, power outage management, accident handling, power outage maintenance and other tasks in the distribution station area are arduous and complex, among which power outage and power transmission management have always been one of the weak links in the operation of the power supply system. About 85% of the low-voltage main switches of distribution transformers are equipped with undervoltage releases, which trip when the line fails, but these undervoltage releases do not have the function of automatic closing. In actual use, some lines have false tripping and The defect that the switch cannot be closed in time after tripping, so when a false trip occurs, the staff needs to go to the site to close the switch and send power, and the staff must go to each power distribution room to send power one by one, which increases the labor intensity of the staff on the one hand, On the other hand, taking the 10kV main line as an example, it takes 2-3 hours to fully restore the power supply after a power outage. Due to the prolonged power outage time, the reliability of the power supply is reduced, and the power outage time is too long, which brings a lot of inconvenience to users and affects production and life. cause a large impact.

In order to realize automatic closing, a Chinese utility model with application date of September 29, 2012 and application number 201220503254.1 discloses an automatic reclosing leakage circuit breaker, including a leakage circuit breaker body and a motor connected to the leakage circuit breaker body An operating mechanism, a microcontroller connected to the motor operating mechanism, and a leakage detection device. The leakage circuit breaker body is also connected with a definite time delay device, and the definite time delay device is an electronic time delay device. The above-mentioned automatic reclosing leakage circuit breaker adopts an electronic delay device and has a definite time delay action function, which can realize automatic closing,

But above-mentioned device can't judge distribution transformer low-voltage master switch normal trip or false trip, if all automatic reclosing immediately after tripping, all can have influence on user and distribution station equipment like this, also can cause accident sometimes.

Utility model content

The purpose of the utility model is to overcome the technical problem in the prior art that when the low-voltage main switch of the distribution transformer is disconnected under voltage loss, the voltage loss release cannot be automatically closed, and to provide a Electronic time relay delay closing device with automatic reclosing.

In order to solve the above technical problems, the utility model provides an electronic time relay delay closing device, including a base, an electronic time relay, the electronic time relay is fixed on the base, and the electronic time relay is set as two One, that is, electronic time relay A and electronic time relay B; electronic time relay A and electronic time relay B are connected in series, and two terminal blocks are set on the base, namely terminal block A and terminal block B, terminal block A The terminals of the terminal block and the terminals of the terminal block B are connected correspondingly, the terminal block A is connected with the electronic time relay by a wire, and the terminal block B is respectively connected with the power supply and the closing button.

In the above-mentioned electronic time relay delay closing device, the electronic time relay A is provided with eight terminals, namely terminal 1, terminal 2, terminal 3, terminal 4, terminal 5, terminal 6, terminal 7, terminal 8 ;

The electronic time relay B is provided with eight terminals, namely terminal 1, terminal 2, terminal 3, terminal 4, terminal 5, terminal 6, terminal 7, terminal 8;

The terminal block A set on the base is provided with four terminals S11, S22, P11, and P22, and the terminal block B is provided with four terminals: closing pulse output terminal S1, closing pulse output terminal S2, power terminal P1, and power terminal P2. ;The closing pulse output terminal S1 is connected to S11, the closing pulse output terminal S2 is connected to S22, the power supply terminal P1 is connected to P11, and the power supply terminal P2 is connected to P22;

Terminal 6 of electronic time relay A is connected to S11 of terminal block A, and terminal 5 of electronic time relay B is connected to S22 of terminal block A;

Terminal 7 of electronic time relay A is connected to P11 of terminal block A, and terminal 1 of electronic time relay A is connected to P22 of terminal block A;

The terminal 8 of the electronic time relay A is connected with the terminal 8 of the electronic time relay B by a wire;

In the above-mentioned electronic time relay delay closing device, the closing pulse output terminal S1 of terminal block B is connected to one end of the manual closing button, and the closing pulse output terminal S2 of terminal block B is connected to the other end of the manual closing button;

The power terminal P1 of terminal block B is connected to any one of bus bars A, B, and C on the low-voltage side of the transformer; the power terminal P2 of terminal block B is connected to the neutral line N of the low-voltage side bus bars of the transformer.

In the above-mentioned electronic time relay delay closing device, the electronic time relay is provided with a rotatable dial that can determine the delay time, and the fixed delay time range is set to 0 to 30 seconds. The electronic time relay A The setting delay time is less than the setting delay time of electronic time relay B.

In the above-mentioned electronic time relay delay closing device, the setting time of the electronic time relay A is greater than 6 to 28 seconds, and the setting delay time of the electronic time relay A is shorter than that of the electronic time relay B. The setting delay time is reduced by 2 seconds.

The above electronic time relay delay closing device is provided with a card slot on the base, and the electronic time relay is arranged on the card slot.

In the above electronic time relay delay closing device, a transparent mask is arranged outside the electronic time relay, and the transparent mask is fixedly connected to the base.

In the above-mentioned electronic time relay delay closing device, an indicator light is provided on the electronic time relay, and there are two indicator lights, that is, indicator light one and indicator light two.

The working principle of the utility model is: when the distribution transformer is powered off and then resumes power transmission, the power terminals P1 and P2 detect that the busbar on the low-voltage side of the transformer is re-charged, and the closing device automatically starts to delay, after a delay of 6s to 30s After 1 hour, the closing device outputs a closing pulse with adjustable width through the output terminals S1 and S2. The closing pulse acts on the manual closing circuit to control the automatic closing of the low-voltage main switch, simulating the manual button to be pressed (turned on) and then The process of popping up (disconnecting) achieves the purpose of automatic closing.

Compared with the prior art, the utility model has the following beneficial effects: 1. The low-voltage main switch can be automatically closed to transmit power, thereby improving the power transmission efficiency and power supply reliability.

2. Using two electronic time relays in series, the delay time that can be set is wider and the application range is wider.

3. The utility model has low manufacturing cost, and the electronic time relay has lower power consumption and high reliability.

4. The utility model has a small volume, which is half of the closing device of the electromagnetic relay, and is easy to install.

5. The utility model judges whether the low-voltage main switch is reliable to trip, and then performs automatic reclosing or non-automatic reclosing, so as to avoid impact on users and equipment in the distribution station area, and avoid accidents.

Description of drawings

Fig. 1 is a perspective view of the utility model.

Fig. 2 is a top view of the utility model.

Fig. 3 is a schematic diagram of circuit connection of the utility model.

Description of drawings: 101-base, 102-electronic time relay A102, 103-electronic time relay B, 104-terminal block A, 105-terminal block B, 106-card slot, 107-mask, 108-indicator light 1. 109-indicator light 2.

detailed description

Below in conjunction with accompanying drawing, the utility model is further described.

An electronic time relay delay closing device as shown in Figure 1 to Figure 3, including, electronic time relay, the time relay is used on a circuit with a lower voltage or a smaller current, and can be turned on or off For circuits with high voltage and large current, commonly used time relays include electromagnetic type, air damping type, electric type, and electronic type. In this utility model, the electronic type time relay is used, which has high precision, small size, reliable operation, and The advantages of wide time range. The electronic time relay is fixed on the base 101, for example, a card slot 106 is set on the base 101, the electronic time relay is fixed on the card slot 106, and then fixed with screws, which can prevent the electronic time relay from loosening. In the utility model, there are two electronic time relays, namely the electronic time relay A102 and the electronic time relay B103, and the electronic time relay A102 and the electronic time relay B103 are connected in series; two terminal blocks are set on the base 101 , that is, terminal block A104 and terminal block B105, the terminals of terminal block A104 and the terminals of terminal block B105 are connected correspondingly, terminal block A104 is connected with the electronic time relay by a wire, and terminal block B105 is respectively connected with the power supply and the closing button.

As shown in Figure 3, the electronic time relay A102 is provided with eight terminals, namely terminal 1, terminal 2, terminal 3, terminal 4, terminal 5, terminal 6, terminal 7, and terminal 8; the electronic time relay B103 is provided with eight Terminals, namely terminal 1, terminal 2, terminal 3, terminal 4, terminal 5, terminal 6, terminal 7, and terminal 8; the terminal block A104 provided on the base 101 is provided with four terminals S11, S22, P11, and P22, Terminal block B105 is provided with four terminals: closing pulse output terminal S1, closing pulse output terminal S2, power supply terminal P1, and power supply terminal P2; closing pulse output terminal S1 is connected to S11, closing pulse output terminal S2 is connected to S22, Power terminal P1 is connected to P11, power terminal P2 is connected to P22; terminal 6 of electronic time relay A102 is connected to S11 of terminal block A104, terminal 5 of electronic time relay B103 is connected to S22 of terminal block A104; electronic time relay Terminal 7 of A102 is connected to P11 of terminal block A104, terminal 1 of electronic time relay A102 is connected to P22 of terminal block A104; terminal 8 of electronic time relay A102 is connected with terminal 8 of electronic time relay B103 by a wire; thus The electronic time relay A102 and the electronic time relay B103 can be connected in series.

The closing pulse output terminal S1 of terminal block B105 is connected to one end of the manual closing button, and the closing pulse output terminal S2 of terminal block B105 is connected to the other end of the manual closing button; the power terminal P1 of terminal block B105 is connected to the low-voltage side busbar of the transformer (Any phase of A, B, C) is connected; the power terminal P2 of terminal block B105 is connected to the neutral line (N phase) of the busbar on the low-voltage side of the transformer.

The electronic time relay is equipped with a rotatable dial that can determine the delay time. The range of the delay time is set to 0-30 seconds, and the watch cover is set as a transparent plate, so that the set time of the rotatable dial can be checked. In the utility model, the setting delay time of the electronic time relay A102 is less than the setting delay time of the electronic time relay B103. As an optimal measure, the setting time of the electronic time relay A102 is greater than 6 to 28 seconds, and the setting delay time of the electronic time relay A102 is 2 seconds less than the setting delay time of the electronic time relay B103.

By setting the above-mentioned electronic time relay delay closing device, when the line is under normal inspection and power failure, the transformer loses voltage, and the low-voltage main switch can trip reliably. Terminal P2 is connected to the power supply, and after the set time, the low-voltage main switch will automatically close.

When the line equipment fails, the low-voltage main switch will trip reliably, and the delay closing device of the electronic time relay will not reclose automatically.

When the low-voltage main switch is manually separated, the low-voltage main switch trips reliably, and the electronic time relay delay closing device does not reclose automatically.

When the operating handle is pushed to the far side, the manual control circuit is disconnected, and the relay control circuit is not affected at this time, and it can still operate reliably.

In this way, the safety performance requirements of the closing device can be met, and power supply accidents caused by false closing can be avoided.

As a further improvement measure of the utility model, a transparent mask 107 is arranged outside the electronic time relay, and the transparent mask 107 is fixedly connected with the base 101, so that the delay time of the rotating dial can be visually observed.

As a further improvement measure of the utility model, an indicator light is set on the electronic time relay, and there are two indicator lights. That is, indicator light 108 and indicator light 2 109, when the power terminal P1 and power terminal P2 are connected to the 220V AC power supply, the indicator light 108 is on, indicating that the electronic time relay has been energized; when the electronic time relay reaches the set delay When the time is set, indicator light two 109 is on, indicating that the delay time set has arrived, and the electronic time relay delay closing device starts the closing function.

The usage method of the utility model: After disconnecting the high-voltage switch of the control transformer, first fix the closing device to the secondary control room of the low-voltage main switch cabinet with 4 bolts, and then connect the wiring: the power terminal P1 is connected to the low-voltage side mother of the transformer The live wire (any phase of A, B, C) and the power terminal P2 are connected to the zero line (N phase) of the busbar on the low-voltage side of the transformer; the closing pulse output terminal S1 is connected to one end of the manual closing button, and the closing pulse output Terminal S2 is connected to the other end of the manual closing button, that is, the output terminals S1 and S2 of the closing device are connected in parallel with the closing circuit of the manual button, and the installation is complete. Under the premise of not changing the existing equipment, the utility model can realize the automatic time-delay closing of the low-voltage main switch when the 10kV main line power failure needs to resume power transmission.

The embodiment of the utility model has been described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the above embodiment, and for those of ordinary skill in the art, some modifications and improvements can be made without departing from the premise of the utility model , these should also be regarded as belonging to the protection scope of the present utility model.

Claims (8)

1. An electronic time relay delay closing device, comprising a base (101), an electronic time relay, and the electronic time relay is fixed on the base (101), characterized in that: the electronic time relay is set to Two, namely the electronic time relay A (102) and the electronic time relay B (103); the electronic time relay A (102) and the electronic time relay B (103) are connected in series, and two Terminal row A (104) and terminal row B (105), the terminals of terminal row A (104) and the terminals of terminal row B (105) are connected correspondingly, terminal row A (104) is composed of wires and electronic The time relay is connected, and terminal block B (105) is connected to the power supply and the closing button respectively. 2. The electronic time relay delay closing device according to claim 1, characterized in that: the electronic time relay A (102) is provided with eight terminals, namely terminal 1, terminal 2, terminal 3, Terminal 4, Terminal 5, Terminal 6, Terminal 7, Terminal 8; The electronic time relay B (103) is provided with eight terminals, namely terminal 1, terminal 2, terminal 3, terminal 4, terminal 5, terminal 6, terminal 7 and terminal 8; The terminal block A (104) set on the base (101) is set with four terminals S ₁₁ , S ₂₂ , P ₁₁ , and P ₂₂ , and the terminal block B (105) is set with the closing pulse output terminal S ₁ , closing pulse Output terminal S ₂ , power terminal P ₁ , power terminal P ₂ four terminals; closing pulse output terminal S ₁ is connected to S ₁₁ , closing pulse output terminal S ₂ is connected to S ₂₂ , and power terminal P ₁ is connected to P ₁₁ , the power supply terminal P2 is connected to _{P22 ;} Terminal 6 of electronic time relay A (102) is connected to S ₁₁ of terminal block A (104), and terminal 5 of electronic time relay B (103) is connected to S ₂₂ of terminal block A (104); Terminal 7 of electronic time relay A (102) is connected to P ₁₁ of terminal block A (104), and terminal 1 of electronic time relay A (102) is connected to P ₂₂ of terminal block A (104); The terminal 8 of the electronic time relay A (102) and the terminal 8 of the electronic time relay B (103) are connected by wires. 3. The electronic time relay delay closing device according to claim 2, characterized in that: the closing pulse output terminal S ₁ of the terminal block B (105) is connected to one end of the manual closing button, and the terminal block B (105) ) of the closing pulse output terminal S ₂ is connected to the other end of the manual closing button; The power terminal P ₁ of terminal block B (105) is connected to any one of bus bars A, B, and C on the low-voltage side of the transformer; the power terminal P ₂ of terminal block B (105) is connected to the neutral line N of the low-voltage side bus bars of the transformer. 4. The delay closing device of the electronic time relay according to claim 1, characterized in that: the electronic time relay is provided with a rotatable dial capable of determining the delay time, and the range of the delay time is set to 0~30 seconds, the setting delay time of the electronic time relay A (102) is less than the setting delay time of the electronic time relay B (103). 5. The electronic time relay delay closing device according to claim 4, characterized in that: the setting time of the electronic time relay A (102) is greater than 6 seconds to 28 seconds, and the electronic time relay A (102) The setting delay time of time relay A (102) is 2 seconds less than the setting delay time of electronic time relay B (103). 6. The electronic time relay delay closing device according to claim 1, characterized in that: a card slot (106) is set on the base (101), and the electronic time relay is set in the card slot (106) superior. 7. The electronic time relay delay closing device according to claim 1, characterized in that: a transparent mask (107) is arranged outside the electronic time relay, and the transparent mask (107) is fixed to the base (101) connect. 8. The electronic time relay delay closing device according to claim 1, characterized in that: an indicator light is set on the electronic time relay, and the number of said indicator lights is set to two, that is, one indicator light (108) and indicator light two (109).