CN203164278U - Transformer substation switch chamber high-voltage equipment grounding step voltage detecting device - Google Patents

Abstract

The utility model relates to a grounding step voltage detection device for high-voltage equipment in a switch room of a substation, which belongs to the technical field of power supply detection. The technical solution is: the output terminals of grounding pole 1 (2) and grounding pole 2 (3) are connected to the input terminal of the overvoltage relay, the indicator light (5) is set on the overvoltage relay, and the normal voltage of the overvoltage relay (1) The open contact is connected to the buzzer (4), the distance between grounding pole 1 and grounding pole 2 is 0.8 meters, and the action value of the overvoltage relay is 12V; there is also a multi-channel voltage display module (6), and the number of test units is More than one, multiple test units are respectively connected to the multi-channel voltage display module. The beneficial effects of the utility model are: simple structure, low cost, by detecting the step voltage to judge whether the high-voltage equipment in the 10kV switch room of the substation is grounded, effectively preventing the operators of the substation from causing electric shock and personal injury when the high-voltage equipment in the 10kV switch room is grounded .

Description

A grounding step voltage detection device for high-voltage equipment in a substation switch room

technical field

The utility model relates to a grounding step voltage detection device for high-voltage equipment in a switch room of a substation, which belongs to the technical field of power supply detection.

Background technique

The high-voltage equipment in the switch room of the substation is an ungrounded system. For example, the 10kV voltage level of the substation is an ungrounded system. When a single-phase ground occurs in the 10kV system, the 10kV circuit breaker will not trip. When personnel enter the 10kV switch room and approach the grounding point of the 10kV equipment, step voltage may be generated, or when they touch the shell of the 10kV equipment, it may cause electric shock and personal injury. The "Electricity Safety Work Regulations" (substation part) clearly stipulates that when the high-voltage equipment is grounded, the room must not be within 4 meters of the fault point. How to accurately and conveniently detect the step voltage and prevent personal electric shock is a technical problem to be solved urgently in this field.

Utility model content

The purpose of the utility model is to provide a grounding step voltage detection device for high-voltage equipment in the switch room of a substation. By detecting the step voltage, an early warning can be given to the grounding of high-voltage equipment in the switch room of the substation to prevent operators of the substation from entering the switch without knowing it. room, prevent personal electric shock, and solve the above-mentioned problems in the background technology.

The technical scheme of the utility model is: a grounding step voltage detection device for high-voltage equipment in a substation switch room, including an overvoltage relay, a grounding pole 1, a grounding pole 2, a buzzer, an indicator light, a normally open contact, and multiple voltages Display module, the output ends of the first ground electrode and the second earth electrode are connected to the input end of the overvoltage relay, the indicator light is set on the overvoltage relay, the normally open contact of the overvoltage relay is connected to the buzzer, and the ground electrode The distance between the first and the second grounding pole is 0.8 meters, and the action value of the overvoltage relay is 12V; there is also a multi-channel voltage display module, the overvoltage relay, the grounding pole 1, the grounding pole 2, the buzzer, the indicator light and the normal The open contacts form a test unit, the number of the test unit is more than one, and the multiple test units are respectively connected to the multi-channel voltage display module.

There are also a host and function keys, overvoltage relays, indicator lights and multi-channel voltage display modules are set in the host, function keys are set on the surface of the host, the function keys match the multi-channel voltage display module, and are used to view and display multiple Each test unit voltage signal processed by the voltage display module.

Using the above-mentioned grounding step voltage detection device, the main engine is installed outside the switchgear of the substation, and the first and second grounding electrodes are arranged next to the high-voltage equipment in the switchgear room of the substation. The second grounding pole is a steel bar buried vertically in the ground, with a depth of 0.5 meters; after the single-phase grounding of the high-voltage equipment in the switch room of the substation, a voltage difference is generated between the grounding pole 1 and the grounding pole 2. When the voltage difference reaches the overvoltage When the action value of the relay is 12V, the normally open contact of the overvoltage relay is closed, the buzzer is turned on and the alarm sound is sounded, and at the same time the indicator light on the overvoltage relay is on to give an alarm, and the multi-channel voltage display module displays the step voltage value; The distance between multiple pairs of ground electrodes in a test unit is 4 meters; the multi-channel voltage display module displays the step voltage value, and when any one of the multiple overvoltage relays connected in parallel reaches the action value, the indicator light on the corresponding overvoltage relay will be on. Light up, and the buzzer will sound an alarm at the same time; through the indicator light and voltage display, it can be judged which group of grounding electrodes is close to the high-voltage equipment that is grounded.

The high-voltage equipment is a high-voltage switchgear, which is arranged in a switch room, and multiple pairs of grounding electrodes of multiple test units are arranged at intervals along the direction of arrangement of the high-voltage switchgear. The distance between a high-voltage switchgear and the nearest grounding electrode is less than 4 meters.

The beneficial effects of the utility model are: simple structure, low cost, by detecting the step voltage to judge whether the high-voltage equipment in the 10kV switch room of the substation is grounded, effectively preventing the operators of the substation from causing electric shock and personal injury when the high-voltage equipment in the 10kV switch room is grounded .

Description of drawings

Fig. 1 is a schematic circuit diagram of the utility model;

Fig. 2 is a structural diagram of the main engine of the present utility model;

In the figure: overvoltage relay 1, grounding pole 1, grounding pole 2 3, buzzer 4, indicator light 5, multi-channel voltage display module 6, normally open contact 7, and function key 8.

Detailed ways

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

This embodiment is used in a switch room of a 10kV substation.

A grounding step voltage detection device for high-voltage equipment in a switch room of a substation, comprising an overvoltage relay 1, grounding pole 1 2, grounding pole 2 3, buzzer 4, indicator light 5, normally open contact 7 and a multi-channel voltage display module 6. The output ends of the ground electrode 1 and the ground electrode 2 are connected to the input end of the overvoltage relay, the indicator light is set on the overvoltage relay, the normally open contact of the overvoltage relay is connected to the buzzer, and the ground electrode 1 The distance from the ground pole 2 is 0.8 meters, and the action value of the overvoltage relay is 12V; there is also a multi-channel voltage display module, the overvoltage relay, the ground pole 1, the ground pole 2, the buzzer, the indicator light and the normally open The contacts form a test unit, the number of the test unit is more than one, and the multiple test units are respectively connected to the multi-channel voltage display module.

There are also a host and function keys, overvoltage relays, indicator lights and multi-channel voltage display modules are set in the host, function keys are set on the surface of the host, the function keys match the multi-channel voltage display module, and are used to view and display multiple Each test unit voltage signal processed by the voltage display module.

Using the above-mentioned grounding step voltage detection device, the main engine is installed outside the switchgear of the substation, and the first and second grounding electrodes are arranged next to the high-voltage equipment in the switchgear room of the substation. The second grounding pole is a steel bar buried vertically in the ground, with a depth of 0.5 meters; after the single-phase grounding of the high-voltage equipment in the switch room of the substation, a voltage difference is generated between the grounding pole 1 and the grounding pole 2. When the voltage difference reaches the overvoltage When the action value of the relay is 12V, the normally open contact of the overvoltage relay is closed, the buzzer is turned on and the alarm sound is sounded, and at the same time the indicator light on the overvoltage relay is on to give an alarm, and the multi-channel voltage display module displays the step voltage value; The distance between multiple pairs of ground electrodes in a test unit is 4 meters; the multi-channel voltage display module displays the step voltage value, and when any one of the multiple overvoltage relays connected in parallel reaches the action value, the indicator light on the corresponding overvoltage relay will be on. Light up, and the buzzer will sound an alarm at the same time; through the indicator light and voltage display, it can be judged which group of grounding electrodes is close to the high-voltage equipment that is grounded.

The high-voltage equipment is a high-voltage switchgear, which is arranged in a switch room, and multiple pairs of grounding electrodes of multiple test units are arranged at intervals along the direction of arrangement of the high-voltage switchgear. The distance between a high-voltage switchgear and the nearest grounding electrode is less than 4 meters.

Claims (2)

1. A grounding step voltage detection device for high-voltage equipment in a substation switch room, characterized in that it includes an overvoltage relay (1), grounding pole 1 (2), grounding pole 2 (3), buzzer (4), and an indication Lamp (5), normally open contact (7) and multi-channel voltage display module (6), the output terminals of grounding pole 1 and grounding pole 2 are connected to the input terminal of the overvoltage relay, and the indicator light is set at the overvoltage On the relay, the normally open contact of the overvoltage relay is connected to the buzzer, the distance between grounding pole 1 and grounding pole 2 is 0.8 meters, and the action value of the overvoltage relay is 12V; there is also a multi-channel voltage display module, the overvoltage The voltage relay, the ground electrode 1, the ground electrode 2, the buzzer, the indicator light and the normally open contact form a test unit, the number of the test unit is more than one, and the multiple test units are respectively connected to the multi-channel voltage display module. 2. The ground step voltage detection device for high-voltage equipment in a substation switch room according to claim 1, characterized in that: a host and function keys are also provided, and an overvoltage relay, an indicator light and a multi-channel voltage display module are arranged on the host Inside, the function keys are set on the surface of the host, and the function keys match the multi-channel voltage display module.

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