CN205178476U - Ground structure of lamp pole voltage type earth leakage protector - Google Patents

Abstract

The utility model relates to a grounding structure of a voltage-type grounding protector for a light pole, which comprises a light pole, a voltage-type grounding protector connected in the light pole, and at least one insulated grounding wire. Below the ground, the two ends of the insulated ground wire are separated from the insulation layer, the upper end is connected to the voltage-type ground protector, and the lower end is inserted into the ground as a probe, and a protective sleeve is provided over the vertical connection part of the insulated ground wire and the ground. The probe end extends axially downward from the lower end of the protective sleeve, and the distance a between the end of the probe end and the lower end of the protective sleeve is greater than or equal to 50 cm. The purpose of setting the grounding probe is to prevent the short circuit between the exposed conductive part of the electrical equipment and the probe, and to ensure that the potential difference measured by the probe is equal to the human body contact voltage.

Description

A grounding structure of a lamp pole voltage type grounding protector

technical field

The utility model relates to an electrical safety protection appliance, in particular to a grounding structure of a lamp pole voltage type grounding protector, which is suitable for leakage protection of exposed conductive parts of electrical equipment, especially street lamps, billboard light boxes, and traffic indicator lights Protection of indoor and outdoor facilities or devices that are prone to leakage.

Background technique

In the prior art, indoor and outdoor facilities or devices that are prone to electric leakage, such as street lamps, billboard light boxes, and traffic lights, are located in the center of the green belt or on the side of the shaft with built-in cables, so that the grounding probe can be directly buried in the ground Or go out from the shaft at the bottom of the light pole, and it is enough to meet the equipotential body of the light pole in the horizontal or vertical direction to be greater than or equal to 50CM, but in reality, many light poles are on the sidewalk, and the street lamps are surrounded by concrete floors or floor tiles. The grounding probe cannot be effectively inserted into the ground, or the original wells including sidewalks and green isolation belts are buried, or the wells are very shallow, which is not conducive to the installation of grounding probes.

Contents of the invention

The purpose of this utility model is to provide a grounding structure of a lamp pole voltage type grounding protector in order to avoid the deficiencies in the background technology.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a grounding structure of a voltage-type grounding protector for a light pole, including a light pole, a voltage-type grounding protector connected in the light pole, at least one insulated grounding wire, and The installation end of the lower end of the rod is located below the ground as the ground electrode, the two ends of the insulated ground wire are separated from the insulation layer, the upper end is connected to the voltage type ground protector, and the lower end is inserted into the ground as the probe end, and the insulated ground wire is transverse to the ground Or the longitudinal connection part is covered with a protective sleeve, the probe end extends horizontally or vertically from the end of the protective sleeve, and the distance a between the end of the probe end and the lower end of the protective sleeve is greater than or equal to 50 cm.

For an optimization of the utility model, the insulated ground wire is an insulated copper wire.

For an optimization of the utility model, the protective sleeve is a metal pipe or a plastic pipe.

For an optimization of the utility model, the part of the protective sleeve exposed to the ground adopts an elbow to directly weld or punch a hole in the ground part of the street lamp pole, and the insulated grounding wire is passed through the protective sleeve and grounded with the voltage type inside the lamp pole. Protector ground connection.

For an optimization of the present utility model, the voltage-type grounding protector includes a current-limiting resistor, a tripping coil composed of an electromagnet and an automatic switch, a thyristor, a voltage regulator tube, and a bridge rectifier, and the bridge rectifier includes a first Pin (a), second pin (b), third pin (c), fourth pin (d), the conductive casing of the protected electrical equipment and the first pin (a) are limited in series The upper end of the insulated ground wire is connected to the third pin (c), the second pin (b) is connected to the M1 end of the trip coil, and the M2 end of the trip coil is connected to the A3 end of the thyristor. The K1 end of the thyristor is connected to the fourth pin (d), the energy storage capacitor is connected in parallel between the second pin (b) and the fourth pin (d), the G2 end of the thyristor is connected to the voltage regulator tube The anode terminal is connected, and the cathode terminal of the Zener tube is connected to the second pin (b) or the M2 terminal of the tripping coil.

For an optimization of the present invention, the G2 terminal of the thyristor is connected to the positive terminal of the voltage regulator tube through the second current limiting resistor.

Compared with the background technology, the purpose of the utility model is that the setting of the grounding probe is that the grounding probe can be effectively inserted into the ground to ensure that there is a potential difference between the probe and the leaking conductive body; the peripheral protective sleeve can effectively protect the aging of the grounding probe ; For the setting voltage type grounding protector, it does not have high requirements for the grounding system, and does not require an external power supply. As long as the input signal (light pole relative to the ground) has a certain voltage, once the light pole is charged, the voltage of the energy storage capacitor reaches a steady state. After the pressure tube conducts the voltage range value, the voltage regulator tube conducts, triggers the thyristor instantaneously, and makes the tripping coil act, so that the grounding protector acts to disconnect the main circuit switch of the power supply, ensuring safety.

Description of drawings

Figure 1 is a schematic diagram of the installation of the grounding structure of the lamp pole voltage type grounding protector.

Figure 2 is a functional block diagram of a voltage-type grounding protector.

First current limiting resistor 1, bridge rectifier 2, energy storage capacitor 3, voltage regulator tube 4, tripping coil 5, thyristor 6, second current limiting resistor 9, ground 11, protective sleeve 12, insulated grounding wire 13. Probe end 13b, light pole 14, voltage type grounding protector 15

detailed description

Embodiment 1: Refer to Figure 1-2. A grounding structure of a voltage-type grounding protector for a light pole, including a light pole 14, a voltage-type grounding protector 15 connected to the light pole 14, at least one insulated grounding wire 13, and the installation end at the lower end of the light pole 14 as a ground electrode 14a is located below the ground 11, the two ends of the insulated grounding wire 13 are separated from the insulating layer, the upper end 13a is connected to the voltage-type grounding protector 15, and the lower end is inserted into the ground 11 as the probe end 13b, and the insulated grounding wire 13 is transverse to the ground Or the longitudinal connection part is covered with a protective sleeve 12, the probe end 13b extends horizontally or vertically from the protective sleeve 12, and the distance a between the end of the probe end 13b and the lower end of the protective metal sleeve 12 is greater than or equal to 50cm. The insulated ground wire 13 is an insulated copper wire. The protective sleeve is a metal pipe or a plastic pipe. The part of the protective sleeve 12 exposed to the ground is directly welded or punched to the ground part of the street light pole 14 with a bent pipe. The insulated grounding wire 13 is passed through the protective sleeve 12 and It is connected to the ground terminal of the voltage-type grounding protector 15 inside the light pole 14 . The distance between the lower end of the light pole 14 and the ground is b. The grounding resistance of the light pole 14 itself is far below the existing specified value. The protective sleeve 12 is a metal tube, which can be used as a supplementary grounding of the light pole 14. When the length is equal to the underground part of the light pole 14, the grounding probe is insulated wire On this basis, extend down at least 50CM. If the supplementary grounding effect is not good, the protective sleeve 12 can be extended downward to a sufficient depth, but the end should always be kept at least 50CM from the top of the grounding probe. It is welded or punched with the ground part of the street light pole, and the insulated wire 13 of the grounding probe passes through the protective sleeve and enters the inner cavity of the light pole to connect with the ground terminal of the voltage-type grounding protector. If the grounding effect of the light pole 14 itself To reach the existing specified value, the protective sleeve 12 can be a plastic tube, which is the same as the metal tube as the protective tube of the grounding probe, but the length can be arbitrary, as long as the top of the grounding probe meets the underground part of the street lamp pole ≥ 50CM; the grounding probe It can also be installed horizontally, passing through the protective sleeve 12 and walking along the ground surface. The principle is the same as that of the vertical direction. The top of the grounding probe can be inserted into the ground and make reliable contact with the earth. When installing horizontally, the grounding probe can be connected with an insulated wire and the grounding pin, and the grounding pin can be smashed directly. into the ground.

Embodiment 2: with reference to Fig. 2. The input circuit includes a first current-limiting resistor 1, a tripping coil 5 composed of an electromagnet and an automatic switch, a thyristor 6, a voltage regulator tube 4, and a bridge rectifier 2, and the bridge rectifier 2 includes a first pin a, The second pin b, the third pin c, and the fourth pin d, the conductive casing of the electrical equipment is connected in series with the first pin a, and the first current limiting resistor 1 is connected in series, and the ground terminal is connected to the third pin c, The second pin b is connected to the M1 end of the tripping coil 5, the M2 end of the tripping coil 5 is connected to the A3 end of the thyristor 6, and the K1 end of the thyristor 6 is connected to the fourth pin d. An energy storage capacitor 3 is connected in parallel between the second pin b and the fourth pin d, the G2 end of the thyristor 6 is connected to the anode end of the voltage regulator tube 4, and the cathode end of the voltage regulator tube 4 is connected to the second pin b Or the M2 end of the tripping coil 5 is connected. The G2 end of the thyristor 6 is connected to the anode end of the regulator tube 4 through the second current limiting resistor 5 . The G2 terminal of the thyristor is connected to the positive terminal of the voltage regulator tube 4 through the second current limiting resistor 9 .

It should be understood that: although the present embodiment has described the present invention in more detail, these descriptions are only simple descriptions of the present invention, rather than limitations of the present invention, and any inventions that do not exceed the essence of the present invention are all Fall into the protection scope of the present invention.

Claims (5)

1. A grounding structure of a voltage-type grounding protector for a light pole, including a light pole, a voltage-type grounding protector connected to the light pole, and at least one insulated grounding wire, and the installation end at the lower end of the light pole is located below the ground as a ground electrode , which is characterized in that: the two ends of the insulated grounding wire are separated from the insulating layer, the upper end is connected to the voltage type grounding protector, and the lower end is inserted into the ground as a probe end, and the horizontal or vertical connection part of the insulated grounding wire and the ground is equipped with a For the protective sleeve, the probe end extends horizontally or vertically from the end of the protective sleeve, and the distance a between the end of the probe end and the lower end of the protective sleeve is greater than or equal to 50 cm. 2. The grounding structure of the lamp pole voltage type grounding protector according to claim 1, wherein the insulated grounding wire is an insulated copper wire. 3. The grounding structure of the lamp pole voltage type grounding protector according to claim 1, characterized in that: the part of the protection sleeve exposed to the ground is directly welded or punched to the ground part of the street lamp lamp pole with an elbow, and the insulated grounding wire is passed through It is arranged in the protective casing and connected to the grounding terminal of the voltage-type grounding protector inside the light pole, and the protective casing is a metal pipe or a plastic pipe. 4. The grounding structure of the lamp pole voltage-type grounding protector according to claim 1, characterized in that: the voltage-type grounding protector includes a current-limiting resistor, a tripping coil composed of an electromagnet and an automatic switch, a thyristor, Zener tube, bridge rectifier, bridge rectifier includes first pin (a), second pin (b), third pin (c), fourth pin (d), protected electrical equipment The conductive shell is connected in series with the first pin (a) to a current-limiting resistor, the upper end of the insulated grounding wire is connected to the third pin (c), and the second pin (b) is connected to the M1 end of the tripping coil. The M2 end of the coil is connected to the A3 end of the thyristor, the K1 end of the thyristor is connected to the fourth pin (d), and the storage device is connected between the second pin (b) and the fourth pin (d). Energy capacitor, the G2 terminal of the thyristor is connected to the anode terminal of the voltage regulator tube, and the cathode terminal of the voltage regulator tube is connected to the second pin (b) or the M2 terminal of the tripping coil. 5. The grounding structure of the lamp pole voltage type grounding protector according to claim 4, wherein the G2 terminal of the thyristor is connected to the positive terminal of the Zener tube through the second current limiting resistor.