CN202455038U - Main circuit earth leakage lockout device for coal mine explosion-proof high-voltage frequency converter - Google Patents
Main circuit earth leakage lockout device for coal mine explosion-proof high-voltage frequency converter Download PDFInfo
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- CN202455038U CN202455038U CN201220063207XU CN201220063207U CN202455038U CN 202455038 U CN202455038 U CN 202455038U CN 201220063207X U CN201220063207X U CN 201220063207XU CN 201220063207 U CN201220063207 U CN 201220063207U CN 202455038 U CN202455038 U CN 202455038U
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Abstract
The utility model discloses a main circuit earth leakage lockout device for a coal mine explosion-proof high-voltage frequency converter. The main circuit earth leakage lockout device comprises a control power supply, a high-voltage protective measuring and controlling module component, an earth leakage detecting extension module component, a high-voltage relay, a high-voltage relay normally open contact, a switching-in control signal, a frequency converter output signal and a frequency converter starting signal. By the aid of a high-voltage protective measuring and controlling module, an earth leakage detecting extension module and the high-voltage relay, the insulation resistance to ground of a main circuit of the explosion-proof high-voltage frequency converter is detected by means of automatic switching control technique. The main circuit earth leakage lockout device has the advantages of safety, reliability, simplicity in control, compact structure, convenience in use and the like.
Description
Technical field
The utility model relates to a kind of major loop earth leakage search/lockout device that is used for the coal mine explosion-proof high voltage converter.This device has solved explosion-proof high-pressure frequency converter major loop earth leakage search/lockout problem through the detection to explosion-proof high-pressure frequency converter major loop insulation against ground resistance.
Background technology
At present, coal mine explosion-proof high voltage converter input circuit earth leakage search/lockout is to be accomplished by the high voltage flame proof switch to its power supply, and to explosion-proof high-pressure frequency converter output loop; Can only adopt insulation monitor to realize creepage protection function mostly; Its shortcoming is exactly that frequency converter must move, when having only frequency converter output voltage to be established to certain value, and insulation monitor ability reliably working; Thereby this protected mode has certain hysteresis quality, and expansion is prone to cause the accident.
Summary of the invention
The purpose of the utility model is to overcome the deficiency of prior art, and a kind of major loop earth leakage search/lockout device 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 high-voltage relay; Through the automatic switching control technology; When high voltage converter did not close a floodgate, high-voltage relay normally opened contact automatic time delay was closed, and the detection of electrical leakage link drops into; Through detection, accomplish the earth leakage search/lockout function to high voltage converter output loop insulation against ground resistance; When high voltage converter sent the permission switching signal, the high-voltage relay normally opened contact broke off, and realized the isolation fully of high and low pressure part.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, high-voltage relay, high-voltage relay normally opened contact, energization control signal, frequency converter output signal, frequency converter initiating 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 automatic switching control relay and an earth leakage search/lockout relay;
Detection of electrical leakage expansion module assembly is made up of a detection of electrical leakage expansion module and a flat cable;
High-voltage relay is made up of first group of normally opened contact of automatic switching control relay, second group of normally opened contact and first high-voltage relay and second high-voltage relay;
The high-voltage relay normally opened contact is made up of one group of normally opened contact of first high-voltage relay and one group of normally opened contact of second high-voltage relay;
Energization control signal allows first group of normally opened contact, first group of normally-closed contact of automatic switching control relay, first group of normally-closed contact of earth leakage search/lockout relay and one group of normally-closed contact of first high-voltage relay of closing relay to form by high voltage converter;
Frequency converter output signal allows second group of normally opened contact of closing relay to form with one group of normally opened contact that high voltage converter moves relay by high voltage converter;
The frequency converter initiating signal is made up of second group of normally-closed contact of a starting button, automatic switching control relay, second group of normally-closed contact of earth leakage search/lockout relay and one group of normally-closed contact of second high-voltage 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, simultaneously with the high voltage protective control module in an end and the end of second a group of digital quantity output and end of the first group of normally opened contact of automatic switching control relay in the high-voltage relay of first group of digital quantity output link to each other; The power supply negative terminal of high voltage protective control module links to each other with an end and the end of an earth leakage search/lockout relay coil and end of the second group of normally opened contact of automatic switching control relay in the high-voltage relay that digital quantity is imported common port, automatic switching control relay coil; The other end of accident SR links to each other with the first digit amount input of high voltage protective control module; The second digit amount input of high voltage protective control module allows the other end of second group of normally opened contact of closing relay to link to each other with the high voltage converter that frequency converter is exported in the signal; The third digit amount input of high voltage protective control module links to each other with the other end that frequency converter is exported one group of normally opened contact of the high voltage converter operation relay in the signal; The other end of automatic switching control relay coil links to each other with the other end of first group of digital quantity output; The other end of earth leakage search/lockout relay coil links to each other with the other end of second group of digital quantity output;
In the detection of electrical leakage expansion module assembly, the other end of one group of normally opened contact of second high-voltage relay in the anode of first group of analog quantity input of detection of electrical leakage expansion module and the high-voltage relay normally opened contact links to each other; The negative terminal of first group of analog quantity input links to each other with ground; The detection of electrical leakage expansion module links to each other with the high voltage protective control module through flat cable;
In the high-voltage relay, the other end of first group of normally opened contact of automatic switching control relay links to each other with an end of an end of first high-voltage relay coil and second high-voltage relay coil; The other end of first high-voltage relay coil links to each other with the other end of second high-voltage relay coil, links to each other with the other end of second group of normally opened contact of automatic switching control relay simultaneously;
In the high-voltage relay normally opened contact, an end of one group of normally opened contact of first high-voltage relay with from a certain link to each other in the explosion-proof high-pressure frequency converter output loop in the peripheral associate device; The other end of one group of normally opened contact of first high-voltage relay links to each other with an end of one group of normally opened contact of second high-voltage relay;
In the energization control signal, an end of first group of normally opened contact of high voltage converter permission closing relay links to each other with the end from the high voltage flame proof switch closing circuit in the peripheral associate device; The other end links to each other with an end of first group of normally-closed contact of automatic switching control relay; One end of first group of normally-closed contact of the other end of first group of normally-closed contact of automatic switching control relay and earth leakage search/lockout relay links to each other; The other end of first group of normally-closed contact of earth leakage search/lockout relay links to each other with an end of one group of normally-closed contact of first high-voltage relay; The other end of one group of normally-closed contact of first high-voltage relay links to each other with the other end from the high voltage flame proof switch closing circuit in the peripheral associate device;
In the frequency converter output signal; High voltage converter allows an end of second group of normally opened contact of closing relay to link to each other with an end of one group of normally opened contact of high voltage converter operation relay; Simultaneously with high voltage protective control module assembly in, the power positive end of high voltage protective control module links to each other;
In the frequency converter initiating signal, the end in the explosion-proof high-pressure frequency converter start loop in an end of starting button and the peripheral associate device links to each other; The other end of starting button links to each other with an end of second group of normally-closed contact of automatic switching control relay; One end of second group of normally-closed contact of the other end of second group of normally-closed contact of automatic switching control relay and earth leakage search/lockout relay links to each other; The other end of second group of normally-closed contact of earth leakage search/lockout relay links to each other with an end of one group of normally-closed contact of second high-voltage relay; The other end in the explosion-proof high-pressure frequency converter start loop in the other end of one group of normally-closed contact of second high-voltage relay and the peripheral associate device links to each other.
Description of drawings
Figure one is the utility model circuit block diagram;
Figure two 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 major loop earth leakage search/lockout device 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, high-voltage relay D, high-voltage relay normally opened contact E, energization control signal F, frequency converter output signal G, frequency converter initiating signal H.
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 6, an automatic switching control relay 7 and an earth leakage search/lockout relay 8;
Detection of electrical leakage expansion module assembly C is made up of a detection of electrical leakage expansion module 4 and a flat cable 5;
High-voltage relay D is made up of first group of normally opened contact of automatic switching control relay 7 7.1, second group of normally opened contact 7.2 and first high-voltage relay 9, second high-voltage relay 10;
High-voltage relay normally opened contact E is made up of one group of normally opened contact 9.1 of first high-voltage relay 9 and one group of normally opened contact 10.1 of second high-voltage relay 10;
Energization control signal F allows first group of normally opened contact 11.1, first group of normally-closed contact 7.3 of automatic switching control relay 7, first group of normally-closed contact 8.1 of earth leakage search/lockout relay 8 and one group of normally-closed contact 9.2 of first high-voltage relay 9 of closing relay to form by high voltage converter;
Frequency converter output signal G is allowed second group of normally opened contact 11.2 of closing relay and one group of normally opened contact 12 of high voltage converter operation relay to form by high voltage converter;
Frequency converter initiating signal H is made up of second group of normally-closed contact 7.4 of a starting button 13, automatic switching control relay, second group of normally-closed contact 8.2 of earth leakage search/lockout relay 8 and one group of normally-closed contact 10.2 of second high-voltage relay 10.
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 I 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 J 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 6, simultaneously with high voltage protective control module 3 in first group of digital quantity output DO1+ and second group of digital quantity output DO2+ and high-voltage relay D in the end of first group of normally opened contact 7.1 of automatic switching control relay 7 link to each other; One end of one end of one end of the coil of the power supply negative terminal VI-of high voltage protective control module 3 and digital quantity input common port 1M, automatic switching control relay 7 and the coil of earth leakage search/lockout relay 8 and second group of normally opened contact 7.2 of the automatic switching control relay 7 among the high-voltage relay D links to each other; The other end of accident SR 6 links to each other with the first digit amount input DI1 of high voltage protective control module 3; The second digit amount input DI2 of high voltage protective control module 3 allows the other end of second group of normally opened contact 11.2 of closing relay to link to each other with the high voltage converter that frequency converter is exported among the signal G; The third digit amount input DI3 of high voltage protective control module 3 links to each other with the other end that frequency converter is exported one group of normally opened contact 12 of the high voltage converter operation relay among the signal G; The other end of the coil of automatic switching control relay 7 links to each other with first group of digital quantity output DO1-; The other end of the coil of earth leakage search/lockout relay 8 links to each other with second group of digital quantity output DO2-;
Among the detection of electrical leakage expansion module assembly C, the other end of one group of normally opened contact 10.1 of second high-voltage relay among the anode AI1+ of first group of analog quantity input of detection of electrical leakage expansion module 4 and the high-voltage relay normally opened contact E links to each other; The negative terminal AI1-of first group of analog quantity input links to each other with ground; Detection of electrical leakage expansion module 4 links to each other with high voltage protective control module 3 through flat cable 5;
Among the high-voltage relay D, an end of an end of the other end of first group of normally opened contact 7.1 of automatic switching control relay 7 and the coil of first high-voltage relay 9 and the coil of second high-voltage relay 10 links to each other; The other end of the coil of first high-voltage relay 9 links to each other with the other end of the coil of second high-voltage relay 10, and the other end of while with second group of normally opened contact 7.2 of automatic switching control relay 7 links to each other;
Among the high-voltage relay normally opened contact E, an end of one group of normally opened contact 9.1 of first high-voltage relay 9 with from a certain link to each other in the explosion-proof high-pressure frequency converter output loop in the peripheral associate device; The other end of one group of normally opened contact 9.1 of first high-voltage relay 9 links to each other with an end of one group of normally opened contact 10.1 of second high-voltage relay 10;
Among the energization control signal F, an end of first group of normally opened contact 11.1 of high voltage converter permission closing relay links to each other with the end K from the high voltage flame proof switch closing circuit in the peripheral associate device; High voltage converter allows the other end of first group of normally opened contact 11.1 of closing relay to link to each other with an end of first group of normally-closed contact 7.3 of automatic switching control relay 7; The other end of first group of normally-closed contact 7.3 of automatic switching control relay 7 links to each other with an end of first group of normally-closed contact 8.1 of earth leakage search/lockout relay 8; The other end of first group of normally-closed contact 8.1 of earth leakage search/lockout relay 8 links to each other with an end of one group of normally-closed contact 9.2 of first high-voltage relay 9; The other end of one group of normally-closed contact 9.2 of first high-voltage relay 9 links to each other with other end L from the high voltage flame proof switch closing circuit in the peripheral associate device;
Among the frequency converter output signal G; High voltage converter allows an end of second group of normally opened contact 11.2 of closing relay to link to each other with an end of one group of normally opened contact 12 of high voltage converter operation relay; Simultaneously with high voltage protective control module assembly B in, the power positive end VI+ of high voltage protective control module 3 links to each other;
Among the frequency converter initiating signal H, the end M in the explosion-proof high-pressure frequency converter start loop in an end of starting button 13 and the peripheral associate device links to each other; The other end of starting button 13 links to each other with an end of second group of normally-closed contact 7.4 of automatic switching control relay 7; The other end of second group of normally-closed contact 7.4 of automatic switching control relay 7 links to each other with an end of second group of normally-closed contact 8.2 of earth leakage search/lockout relay 8; The other end of second group of normally-closed contact 8.2 of earth leakage search/lockout relay 8 links to each other with an end of one group of normally-closed contact 10.2 of second high-voltage relay 10; Other end N in the explosion-proof high-pressure frequency converter start loop in the other end of one group of normally-closed contact 10.2 of second high-voltage relay 10 and the peripheral associate device links to each other.
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, the wire loop that is respectively two high-voltage relays 9,10 among high voltage protective control module 3 and its digital quantity input, output loop and the high-voltage relay D provides power supply.
The explosion-proof high-pressure frequency converter does not send major loop and allows before the switching signal; For the high voltage flame proof switch of its power supply is in off-position; High voltage converter also is in halted state; This moment, high voltage converter allowed two groups of normally opened contacts 11.1,11.2 of closing relay to be in off-state, and one group of normally opened contact 12 of high voltage converter operation relay is in off-state.After high voltage protective control module 3 receives 11.2 and 12 current states signals; After its inner PLC software logic locking and time-delay; Drive 7 adhesives of automatic switching control relay by its first group of digital quantity output DO1+, DO1-, 7 two groups of normally-closed contacts 7.3 and 7.4 disconnections.7.3 forbid the high voltage flame proof switch combined floodgate in the peripheral associate device through energization control signal F loop; 7.4 forbid the explosion-proof high-pressure frequency converter starting in the peripheral associate device through frequency converter initiating signal H loop.In addition, 7 two groups of normally opened contacts 7.1 and 7.2 closures drive high-voltage relay 9 and 10 adhesives, 9 and 10 one group of normally-closed contact 9.2 and 10.2 disconnections, one group of normally opened contact 9.1 and 10.1 closures.9.2 forbid high voltage flame proof switch combined floodgate through energization control signal F loop; 10.2 forbid the starting of explosion-proof high-pressure frequency converter through frequency converter initiating signal H loop; A certain in the explosion-proof high-pressure frequency converter output loop through 9.1 and 9.2 first group of analog quantity input AI1+ ends of being connected in the detection of electrical leakage expansion module 4; AI1-holds ground connection, can the insulation against ground resistance of explosion-proof high-pressure frequency converter output loop be detected thus.Detected insulation against ground resistance signal is after detection of electrical leakage expansion module 4 carries out mould/number conversion; Be transferred in the high voltage protective control module 3 through flat cable 5, in the PLC software of portion, detected actual value and set point compared within it; When actual value is lower than set point; High voltage protective control module 3 will pass through its second group of digital quantity output DO2+, DO2-drives 8 adhesives of earth leakage search/lockout relay, and first group of normally-closed contact 8.1 of earth leakage search/lockout relay 8 breaks off, and it forbids high voltage flame proof switch combined floodgate through energization control signal F loop; Its second group of normally-closed contact 8.2 breaks off simultaneously, and it forbids the frequency converter starting through frequency converter initiating signal H loop.Have only when insulating resistance value when set point is above, earth leakage search/lockout relay 8 just can discharge.
After the explosion-proof high-pressure frequency converter sends major loop permission switching signal; High voltage converter allows two groups of normally opened contacts, 11.1,11.2 closures of closing relay; After PLC in the high voltage protective control module 3 detects 11.2 current state; Discharge automatic switching control relay 7 immediately, its two groups of normally opened contacts 7.1,7.2 are broken off, high-voltage relay 9,10 discharges; One group of normally opened contact 9.1 of 9 and 10 and 10.1 breaks off, and detection of electrical leakage expansion module 4 and explosion-proof high-pressure frequency converter output loop are isolated fully; Simultaneously, in energization control signal F loop, since one group of normally-closed contact 7.3 closure of 7, one group of normally-closed contact 9.2 closure of 9, if there is not leak current fault, then earth leakage search/lockout relay 8 discharges, at this moment high voltage flame proof switch just can be closed a floodgate; In addition, in frequency converter initiating signal H loop, since another group normally-closed contact 7.4 closures of 7, one group of normally-closed contact 10.2 closure of 10, and 8.2 closures then click starting button 13 and just can start the explosion-proof high-pressure frequency converter.
During the operation of explosion-proof high-pressure frequency converter, automatic switching control relay 7 just is in release condition always, and high-voltage relay 9 and 10 just can not adhesive.Accident SR 6 is used for the fault-signal in the high voltage protective control module 3 is resetted.
Claims (1)
1. major loop earth leakage search/lockout device 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), high-voltage relay (D), high-voltage relay normally opened contact (E), energization control signal (F), frequency converter output signal (G), frequency converter initiating signal (H);
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 (6), an automatic switching control relay (7) and an earth leakage search/lockout relay (8);
Said detection of electrical leakage expansion module assembly (C) is made up of a detection of electrical leakage expansion module (4) and a flat cable (5);
Said high-voltage relay (D) is made up of first group of normally opened contact (7.1), second group of normally opened contact (7.2) and first high-voltage relay (9), second high-voltage relay (10) of automatic switching control relay (7);
Said high-voltage relay normally opened contact (E) is made up of one group of normally opened contact (9.1) of first high-voltage relay (9) and one group of normally opened contact (10.1) of second high-voltage relay (10);
Said energization control signal (F) allows first group of normally opened contact (11.1), first group of normally-closed contact (7.3) of automatic switching control relay (7), first group of normally-closed contact (8.1) of earth leakage search/lockout relay (8) and one group of normally-closed contact (9.2) of first high-voltage relay (9) of closing relay to form by high voltage converter;
Said frequency converter output signal (G) allows second group of normally opened contact (11.2) of closing relay and one group of normally opened contact (12) of high voltage converter operation relay to form by high voltage converter;
Said frequency converter initiating signal (H) is made up of second group of normally-closed contact (7.4) of a starting button (13), automatic switching control relay, second group of normally-closed contact (8.2) of earth leakage search/lockout relay (8) and one group of normally-closed contact (10.2) of second high-voltage relay (10);
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 (I) 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 (J) 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 (6), simultaneously with high voltage protective control module (3) in first group of digital quantity output (DO1+) and second group of digital quantity output (DO2+) and high-voltage relay (D) in the end of first group of normally opened contact (7.1) of automatic switching control relay (7) link to each other; One end of second group of normally opened contact (7.2) of one end of the coil of the power supply negative terminal (VI-) of high voltage protective control module (3) and digital quantity input common port (1M), automatic switching control relay (7) and an end of the coil of earth leakage search/lockout relay (8) and the automatic switching control relay (7) in the high-voltage relay (D) links to each other; The other end of accident SR (6) links to each other with the first digit amount input (DI1) of high voltage protective control module (3); The second digit amount input (DI2) of high voltage protective control module (3) allows the other end of second group of normally opened contact (11.2) of closing relay to link to each other with the high voltage converter that frequency converter is exported in the signal (G); The third digit amount input (DI3) of high voltage protective control module (3) links to each other with the other end that frequency converter is exported one group of normally opened contact (12) of the high voltage converter operation relay in the signal (G); The other end of the coil of automatic switching control relay (7) links to each other with first group of digital quantity output (DO1-); The other end of the coil of earth leakage search/lockout relay (8) links to each other with second group of digital quantity output (DO2-);
In the detection of electrical leakage expansion module assembly (C), the other end of one group of normally opened contact (10.1) of second high-voltage relay in the anode (AI1+) of first group of analog quantity input of detection of electrical leakage expansion module (4) and the high-voltage relay normally opened contact (E) links to each other; The negative terminal of first group of analog quantity input (AI1-) links to each other with ground; Detection of electrical leakage expansion module (4) links to each other with high voltage protective control module (3) through flat cable (5);
In the high-voltage relay (D), the other end of first group of normally opened contact (7.1) of automatic switching control relay (7) links to each other with an end of an end of the coil of first high-voltage relay (9) and the coil of second high-voltage relay (10); The other end of the coil of first high-voltage relay (9) links to each other with the other end of the coil of second high-voltage relay (10), and the other end of while with second group of normally opened contact (7.2) of automatic switching control relay (7) links to each other;
In the high-voltage relay normally opened contact (E), an end of one group of normally opened contact (9.1) of first high-voltage relay (9) with from a certain link to each other in the explosion-proof high-pressure frequency converter output loop in the peripheral associate device; The other end of one group of normally opened contact (9.1) of first high-voltage relay (9) links to each other with an end of one group of normally opened contact (10.1) of second high-voltage relay (10);
In the energization control signal (F), an end of first group of normally opened contact (11.1) of high voltage converter permission closing relay links to each other with the end (K) from the high voltage flame proof switch closing circuit in the peripheral associate device; High voltage converter allows the other end of first group of normally opened contact (11.1) of closing relay to link to each other with an end of first group of normally-closed contact (7.3) of automatic switching control relay (7); The other end of first group of normally-closed contact (7.3) of automatic switching control relay (7) links to each other with an end of first group of normally-closed contact (8.1) of earth leakage search/lockout relay (8); The other end of first group of normally-closed contact (8.1) of earth leakage search/lockout relay (8) links to each other with an end of one group of normally-closed contact (9.2) of first high-voltage relay (9); The other end of one group of normally-closed contact (9.2) of first high-voltage relay (9) links to each other with the other end (L) from the high voltage flame proof switch closing circuit in the peripheral associate device;
In the frequency converter output signal (G); High voltage converter allows an end of second group of normally opened contact (11.2) of closing relay to link to each other with an end of one group of normally opened contact (12) of high voltage converter operation relay; Simultaneously with high voltage protective control module assembly (B) in, the power positive end (VI+) of high voltage protective control module (3) links to each other;
In the frequency converter initiating signal (H), the end (M) in the explosion-proof high-pressure frequency converter start loop in an end of starting button (13) and the peripheral associate device links to each other; The other end of starting button (13) links to each other with an end of second group of normally-closed contact (7.4) of automatic switching control relay (7); The other end of second group of normally-closed contact (7.4) of automatic switching control relay (7) links to each other with an end of second group of normally-closed contact (8.2) of earth leakage search/lockout relay (8); The other end of second group of normally-closed contact (8.2) of earth leakage search/lockout relay (8) links to each other with an end of one group of normally-closed contact (10.2) of second high-voltage relay (10); The other end (N) in the explosion-proof high-pressure frequency converter start loop in the other end of one group of normally-closed contact (10.2) of second high-voltage relay (10) and the peripheral associate device links to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220063207XU CN202455038U (en) | 2012-02-20 | 2012-02-20 | Main circuit earth leakage lockout device for coal mine explosion-proof high-voltage frequency converter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220063207XU CN202455038U (en) | 2012-02-20 | 2012-02-20 | Main circuit earth leakage lockout device for coal mine explosion-proof high-voltage frequency converter |
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| CN202455038U true CN202455038U (en) | 2012-09-26 |
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| CN201220063207XU Expired - Lifetime CN202455038U (en) | 2012-02-20 | 2012-02-20 | Main circuit earth leakage lockout device for coal mine explosion-proof high-voltage frequency converter |
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Cited By (4)
| 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 |
| CN105119533A (en) * | 2015-08-28 | 2015-12-02 | 洛阳中重自动化工程有限责任公司 | Anti-explosion frequency converter leakage locking detection system and method for mine hoist |
| CN105244847A (en) * | 2015-08-28 | 2016-01-13 | 洛阳中重自动化工程有限责任公司 | Multiple safety interlocking protection system and method for explosion-proof frequency converter |
| CN106033002A (en) * | 2015-03-20 | 2016-10-19 | 唐山开诚电控设备集团有限公司 | Explosion-proof high pressure frequency converter water cooling system liquid level detection device |
-
2012
- 2012-02-20 CN CN201220063207XU patent/CN202455038U/en not_active Expired - Lifetime
Cited By (5)
| 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 |
| CN106033002A (en) * | 2015-03-20 | 2016-10-19 | 唐山开诚电控设备集团有限公司 | Explosion-proof high pressure frequency converter water cooling system liquid level detection device |
| CN105119533A (en) * | 2015-08-28 | 2015-12-02 | 洛阳中重自动化工程有限责任公司 | Anti-explosion frequency converter leakage locking detection system and method for mine hoist |
| CN105244847A (en) * | 2015-08-28 | 2016-01-13 | 洛阳中重自动化工程有限责任公司 | Multiple safety interlocking protection system and method for explosion-proof frequency converter |
| CN105244847B (en) * | 2015-08-28 | 2018-11-20 | 洛阳中重自动化工程有限责任公司 | Multiple safety interlocking protection system and method for explosion-proof frequency converter |
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