CN202455026U - Grounding fault protective device for explosion-proof high-voltage converter of coal mine - Google Patents
Grounding fault protective device for explosion-proof high-voltage converter of coal mine Download PDFInfo
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- CN202455026U CN202455026U CN2012200632313U CN201220063231U CN202455026U CN 202455026 U CN202455026 U CN 202455026U CN 2012200632313 U CN2012200632313 U CN 2012200632313U CN 201220063231 U CN201220063231 U CN 201220063231U CN 202455026 U CN202455026 U CN 202455026U
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Abstract
The utility model discloses a grounding fault protective device for an explosion-proof high-voltage converter of a coal mine. The device comprises a control power supply, a high-voltage protection measuring and controlling module assembly, a leak detecting expansion module assembly, grounding signals and grounding fault protection signals. The device detects resistance values between a casing of the explosion-proof high-voltage converter and a grounding point, the grounding fault protection of the explosion-proof high-voltage converter is achieved, and the device has the advantages of being safe, reliable, easy to control, compact in structure, convenient to use and the like.
Description
Technical field
The utility model relates to a kind of earth-fault protection that is used for the coal mine explosion-proof high voltage converter.This device is realized the earth fault protection of explosion-proof high-pressure frequency converter through the shell of detection explosion-proof high-pressure frequency converter and the resistance value between the earth point.
Background technology
At present; Though the shell to the explosion-proof high-pressure frequency converter has all carried out ground connection; But it is whether reliable to the connection the earth point by shell; But do not detect, so just possibly cause and cause equipment operation unstable because of the earthing of casing of explosion-proof high-pressure frequency converter is bad, even serious accident such as cause casualties.
Summary of the invention
The purpose of the utility model is to overcome the deficiency of prior art, and a kind of earth-fault protection that is used for the coal mine explosion-proof high voltage converter is provided.This device adopts high voltage protective control module, detection of electrical leakage expansion module, and the shell of explosion-proof high-pressure frequency converter and the resistance value between the earth point are detected in real time.PLC in the high voltage protective control module compares this resistance value and set point, in case surpass set point, the high voltage protective control module will be carried out protection to the explosion-proof high-pressure frequency converter through the earth fault protection relay.That this device has is safe and reliable, control simple, compact conformation, characteristics such as easy to use.
The purpose of the utility model is achieved in that it is made up of control power supply, high voltage protective control module assembly, detection of electrical leakage expansion module assembly, ground signalling, earth fault protection signal.
The control power supply is made up of one two utmost point circuit breaker and a Switching Power Supply;
High voltage protective control module assembly is made up of a high voltage protective control module, an accident SR, an earth fault protection relay;
Detection of electrical leakage expansion module assembly is made up of a detection of electrical leakage expansion module and a flat cable;
Ground signalling is made up of the shell signal and the earth point signal of explosion-proof high-pressure frequency converter;
The earth fault protection signal is made up of one group of normally-closed contact of earth fault protection relay.
In the control power supply, an end of two utmost point circuit breakers, first utmost point links to each other with an end of external communication control power supply, and the other end of two utmost point circuit breakers, first utmost point links to each other with an input of Switching Power Supply; One end of two utmost point circuit breakers, second utmost point links to each other with the other end of external communication control power supply, and the other end of two utmost point circuit breakers, second utmost point links to each other with another input of Switching Power Supply; The power positive end of the high voltage protective control module in the anode of Switching Power Supply output and the high voltage protective control module assembly links to each other; The negative terminal of Switching Power Supply output links to each other with the power supply negative terminal of high voltage protective control module;
In the high voltage protective control module assembly, the power positive end of high voltage protective control module links to each other with an end of accident SR, and the end of while with the set of number amount output of module self links to each other; The digital quantity input common port of the power supply negative terminal of high voltage protective control module and module self and an end of earth fault protection relay coil link to each other; The other end of the set of number amount output of the other end of earth fault protection relay coil and module self links to each other; A digital quantity input of the other end of accident SR and module self links to each other;
In the detection of electrical leakage expansion module assembly, the shell signal of the explosion-proof high-pressure frequency converter in the anode of one group of analog quantity input of detection of electrical leakage expansion module and the ground signalling links to each other; The negative terminal of analog quantity input links to each other with earth point signal in the ground signalling; The detection of electrical leakage expansion module links to each other with the high voltage protective control module through flat cable;
In the earth fault protection signal, an end of one group of normally-closed contact of earth fault protection relay protects an end in loop to link to each other with the explosion-proof high-pressure frequency converter failure in the peripheral associate device; The other end of one group of normally-closed contact of earth fault protection relay links to each other with the other end in explosion-proof high-pressure frequency converter failure protection loop.
Description of drawings
Fig. 1 is the utility model circuit block diagram;
Fig. 2 is the utility model circuit theory diagrams.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is detailed.
The utility model is a kind of earth-fault protection that is used for the coal mine explosion-proof high voltage converter.It is made up of control power supply A, high voltage protective control module assembly B, detection of electrical leakage expansion module assembly C, ground signalling D, earth fault protection signal E.
Control power supply A is made up of one two utmost point circuit breaker, first utmost point 1.1, two utmost point circuit breakers, second utmost point 1.2 and a Switching Power Supply 2;
High voltage protective control module assembly B is made up of a high voltage protective control module 3, accident SR 4, an earth fault protection relay 5;
Detection of electrical leakage expansion module assembly C is made up of a detection of electrical leakage expansion module 7 and a flat cable 6;
Ground signalling D is made up of with earth point signal 9 the shell signal 8 of explosion-proof high-pressure frequency converter;
Earth fault protection signal E is made up of one group of normally-closed contact 5.1 of earth fault protection relay 5.
Among the utility model control power supply A, an end of two utmost point circuit breakers, first utmost point 1.1 links to each other with an end H of external communication control power supply, and the other end of two utmost point circuit breakers, first utmost point 1.1 links to each other with the input L of Switching Power Supply 2; One end of two utmost point circuit breakers, second utmost point 1.2 links to each other with the other end I of external communication control power supply, and the other end of two utmost point circuit breakers, second utmost point 1.2 links to each other with the input N of Switching Power Supply 2; The power positive end VI+ of the high voltage protective control module 3 among the positive electricity output V of Switching Power Supply 2 and the high voltage protective control module assembly B links to each other; The negative electricity output G of Switching Power Supply 2 links to each other with the power supply negative terminal VI-of high voltage protective control module 3;
Among the high voltage protective control module assembly B, the power positive end VI+ of high voltage protective control module 3 links to each other with an end of accident SR 4, links to each other with the set of number amount output DO1+ of module self simultaneously; The digital quantity input common port 1M of the power supply negative terminal VI-and module of high voltage protective control module 3 self and coil one end of earth fault protection relay 5 link to each other; The digital quantity output DO1-of the other end of the coil of earth fault protection relay 5 and module self links to each other; The digital quantity input DI1 of the other end of accident SR 4 and module self links to each other
Among the detection of electrical leakage expansion module assembly C, the shell signal 8 of the explosion-proof high-pressure frequency converter among the analog quantity input AI2+ of detection of electrical leakage expansion module 7 and the ground signalling D links to each other; Analog quantity input AI2-links to each other with earth point signal 9 among the ground signalling D; Detection of electrical leakage expansion module 7 links to each other with high voltage protective control module 3 through flat cable 6;
Among the earth fault protection signal E, an end of one group of normally-closed contact 5.1 of earth fault protection relay 5 protects an end J in loop to link to each other with the explosion-proof high-pressure frequency converter failure in the peripheral associate device; The other end of one group of normally-closed contact 5.1 of earth fault protection relay 5 links to each other with the other end K in explosion-proof high-pressure frequency converter failure protection loop.
The workflow of the utility model is following:
Be applied to the input of Switching Power Supply 2 through two utmost point circuit breakers 1.1,1.2 from external communication control voltage; Be transformed to needed direct-current control voltage by Switching Power Supply 2, be respectively high voltage protective control module 3 and power supply be provided with its digital quantity input, output loop.
Detection of electrical leakage expansion module 7 detects the shell 8 of explosion-proof high-pressure frequency converter and the resistance value between the earth point 9 in real time through its analog quantity input AI2+, AI2-.This resistance value is transferred among the PLC in the high voltage protective control module 3 through flat cable 6 after detection of electrical leakage expansion module 7 carries out mould/number conversion.When the shell 8 of explosion-proof high-pressure frequency converter is connected with earth point 9 when reliable, the resistance value between them is zero basically; If being connected between shell 8 and the earth point 9 is unreliable; Loosening or obscission occur, then the resistance value between shell 8 and the earth point 9 will increase, and the PLC of this resistance value in high voltage protective control module 3 detects and compare; When it surpasses the protection set point; PLC will pass through its digital quantity output DO1+, DO1-and drive 5 adhesives of earth fault protection relay, and the normally-closed contact 5.1 of earth fault protection relay 5 breaks off, thereby makes the explosion-proof high-pressure frequency converter produce fault and protect.
Accident SR 6 is used for the fault-signal in the high voltage protective control module 3 is resetted.
Claims (1)
1. earth-fault protection that is used for the coal mine explosion-proof high voltage converter is characterized in that: it is made up of control power supply (A), high voltage protective control module assembly (B), detection of electrical leakage expansion module assembly (C), ground signalling (D), earth fault protection signal (E);
Said control power supply (A) is made up of one two utmost point circuit breaker first utmost point (1.1), two utmost point circuit breakers, second utmost points (1.2) and a Switching Power Supply (2);
Said high voltage protective control module assembly (B) is made up of a high voltage protective control module (3), an accident SR (4), an earth fault protection relay (5);
Said detection of electrical leakage expansion module assembly (C) is made up of a detection of electrical leakage expansion module (7) and a flat cable (6);
Said ground signalling (D) is made up of with earth point signal (9) the shell signal (8) of explosion-proof high-pressure frequency converter;
Said earth fault protection signal (E) is made up of one group of normally-closed contact (5.1) of earth fault protection relay (5);
In this device control power supply (A), an end of two utmost point circuit breakers, first utmost points (1.1) links to each other with an end (H) of external communication control power supply, and the other end of two utmost point circuit breakers, first utmost points (1.1) links to each other with the input (L) of Switching Power Supply (2); One end of two utmost point circuit breakers, second utmost points (1.2) links to each other with the other end (I) of external communication control power supply, and the other end of two utmost point circuit breakers, second utmost points (1.2) links to each other with the input (N) of Switching Power Supply (2); The power positive end (VI+) of the high voltage protective control module (3) in the positive electricity output (V) of Switching Power Supply (2) and the high voltage protective control module assembly (B) links to each other; The negative electricity output (G) of Switching Power Supply (2) links to each other with the power supply negative terminal (VI-) of high voltage protective control module (3);
In the high voltage protective control module assembly (B), the power positive end (VI+) of high voltage protective control module (3) links to each other with an end of accident SR (4), links to each other with the set of number amount output (DO1+) of module self simultaneously; The power supply negative terminal (VI-) of high voltage protective control module (3) links to each other with coil one end of the digital quantity of module self input common port (1M) and earth fault protection relay (5); The digital quantity output (DO1-) of the other end and module of the coil of earth fault protection relay (5) self links to each other; The digital quantity input (DI1) of the other end and module of accident SR (4) self links to each other;
In the detection of electrical leakage expansion module assembly (C), the shell signal (8) of the explosion-proof high-pressure frequency converter in the analog quantity input (AI2+) of detection of electrical leakage expansion module (7) and the ground signalling (D) links to each other; Analog quantity input (AI2-) links to each other with earth point signal (9) in the ground signalling (D); Detection of electrical leakage expansion module (7) links to each other with high voltage protective control module (3) through flat cable (6);
In the earth fault protection signal (E), an end of one group of normally-closed contact (5.1) of earth fault protection relay (5) protects an end (J) in loop to link to each other with the explosion-proof high-pressure frequency converter failure in the peripheral associate device; The other end of one group of normally-closed contact (5.1) of earth fault protection relay (5) links to each other with the other end (K) in explosion-proof high-pressure frequency converter failure protection loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200632313U CN202455026U (en) | 2012-02-21 | 2012-02-21 | Grounding fault protective device for explosion-proof high-voltage converter of coal mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200632313U CN202455026U (en) | 2012-02-21 | 2012-02-21 | Grounding fault protective device for explosion-proof high-voltage converter of coal mine |
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| Publication Number | Publication Date |
|---|---|
| CN202455026U true CN202455026U (en) | 2012-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200632313U Expired - Lifetime CN202455026U (en) | 2012-02-21 | 2012-02-21 | Grounding fault protective device for explosion-proof high-voltage converter of coal mine |
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| CN (1) | CN202455026U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103558499A (en) * | 2013-11-18 | 2014-02-05 | 深圳市英威腾电气股份有限公司 | Electric leakage detection device of explosive-proof frequency converter |
-
2012
- 2012-02-21 CN CN2012200632313U patent/CN202455026U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103558499A (en) * | 2013-11-18 | 2014-02-05 | 深圳市英威腾电气股份有限公司 | Electric leakage detection device of explosive-proof frequency converter |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 063020 183 Torch Road, Tangshan City high tech Development Zone, Hebei Patentee after: CITIC HIC KAICHENG INTELLIGENCE EQUIPMENT CO., LTD. Address before: 063020 183 Torch Road, Tangshan City high tech Development Zone, Hebei Patentee before: Tangshan Kaicheng Electronic Control Equipment Group Co., Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120926 |