CN204515046U - A kind of mining electromagnetic starter Integrated Protection System test unit - Google Patents
A kind of mining electromagnetic starter Integrated Protection System test unit Download PDFInfo
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- CN204515046U CN204515046U CN201520221513.5U CN201520221513U CN204515046U CN 204515046 U CN204515046 U CN 204515046U CN 201520221513 U CN201520221513 U CN 201520221513U CN 204515046 U CN204515046 U CN 204515046U
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Abstract
The utility model discloses a kind of mining electromagnetic starter Integrated Protection System test unit, comprise mining electromagnetic starter analog platform and mining electromagnetic starter Integrated Protection System mimic channel, mining electromagnetic starter analog platform comprises mounting seat and the three-phase AC asynchronous motor that is arranged in mounting seat and magnetic powder brake, and the output shaft of three-phase AC asynchronous motor is connected with the input shaft of magnetic powder brake by shaft coupling; Mining electromagnetic starter Integrated Protection System mimic channel comprises motor circuit, feed protection CPU module, overvoltage protection hookup, under-voltage protection hookup, overload protection hookup, short-circuit protection hookup, earth leakage protection hookup and three-phase imbalance protection test circuit, and text display and 24V direct supply.The utility model structure is simple, uses easy to operate, complete function, for the integrated protection finally realizing mining electromagnetic starter is laid a good foundation.
Description
Technical field
The utility model belongs to technical field of mine safety, is specifically related to a kind of mining electromagnetic starter Integrated Protection System test unit.
Background technology
China's overwhelming majority coal mining is underground work, and mining conditions is poor, and gas environment is given prominence to.When mine power supply system reliability is poor, the electric sparks such as consequent electrical equipment mistake is quick-fried, electrical equipment electric leakage, short circuit, electrical fire, hot line job and dangerous temperature all can cause gas and dust explosion.Mining electromagnetic starter is the important component part of Electrical Equipments of Coal Mine electric power system; the protection of its protection system to the overvoltage of Electrical Equipment in Mine supply network, under-voltage, overload, three-phase imbalance, the fault such as electric leakage and short circuit has vital role; be conducive to the gas explosion accident generation reduced because electrical equipment causes, thus Safety of Coal Mine Production efficiency can be improved.But; often there is tripping and malfunction in the protection system being applied to mining electromagnetic starter in prior art; develop new mining electromagnetic starter protection new principle and new technology extremely urgent; and the research and development of new principle and new technology must by means of capable test platform; and; test before mining electromagnetic starter protection system comes into operation, break down after also can avoiding use and bring loss.But; also lack in prior art structure simple, use easy to operate, that complete function, result of use are good mining electromagnetic starter protection system test unit; the inspection of mining electromagnetic starter protection system is finally relied on to the practical application in colliery; mining electromagnetic starter fault is caused to occur frequent; protection system Reliability of Microprocessor is not high, can cause gas and dust explosion time serious.
Utility model content
Technical problem to be solved in the utility model is for above-mentioned deficiency of the prior art; a kind of mining electromagnetic starter Integrated Protection System test unit is provided; its structure is simple; it is convenient to realize; use easy to operate, complete function, for the integrated protection finally realizing mining electromagnetic starter is laid a good foundation; practical, application value is high.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of mining electromagnetic starter Integrated Protection System test unit, it is characterized in that: comprise mining electromagnetic starter analog platform and mining electromagnetic starter Integrated Protection System mimic channel, described mining electromagnetic starter analog platform comprises mounting seat and the three-phase AC asynchronous motor that is arranged in mounting seat and magnetic powder brake, and the output shaft of described three-phase AC asynchronous motor is connected with the input shaft of magnetic powder brake by shaft coupling;
Described mining electromagnetic starter Integrated Protection System mimic channel comprises motor circuit, feed protection CPU module, overvoltage protection hookup, under-voltage protection hookup, overload protection hookup, short-circuit protection hookup, earth leakage protection hookup and three-phase imbalance protection test circuit, and the text display to connect with feed protection CPU module and 24V direct supply, described feed protection CPU module and text display all connect with the output terminal DC24V of 24V direct supply;
Described motor circuit comprise 380V three-phase alternating-current supply and A.C. contactor KM1,380V three-phase alternating-current supply through A.C. contactor KM1 often open main contacts after connect with three-phase AC asynchronous motor through normally closed air switch QS again, C phase line and the A phase line of described 380V three-phase alternating-current supply are also connected with transformer T through disconnector GK, and first group of secondary coil of described transformer T exports 220V voltage, and second group of secondary coil of described transformer T exports 10V voltage, often opening on circuit that main contacts is connected with air switch QS of described A.C. contactor KM1 is connected with three-phase ac current transformer TA, zero sequence current mutual inductor LB and three-phase alternating voltage mutual inductor TV, the output terminal of described three-phase ac current transformer TA, the output terminal of zero sequence current mutual inductor LB and the output terminal of three-phase alternating voltage mutual inductor TV all connect with the input end of feed protection CPU module, the primary coil of described three-phase alternating voltage mutual inductor TV is connected with the input end of feed protection CPU module by insulation resistance R2, one end of described insulation resistance R2 is by electric capacity C1 ground connection, the other end of described insulation resistance R2 is by electric capacity C2 ground connection, the common port of the common port of described three-phase ac current transformer TA, the common port of zero sequence current mutual inductor LB and three-phase alternating voltage mutual inductor TV all connects with the common port of feed protection CPU module, the common port of feed protection CPU module connects with one end of second group of secondary coil of transformer T, and the system voltage end of feed protection CPU module connects with the other end of second group of secondary coil of transformer T, the input end of described feed protection CPU module is also connected to instantaneous starting button SB1 and instantaneous stop button SB2, and the output terminal of described feed protection CPU module is connected to normal run indicator HG and malfunction indicator lamp HR,
Described overvoltage protection hookup comprises stepup transformer TC1, A.C. contactor KM2 for 380V voltage being elevated to 660V and overvoltage protection test switch LS2, described stepup transformer TC1 and A.C. contactor KM2 often open main contacts series connection after and A.C. contactor KM1 often open main contact parallel, between the first group of secondary coil two ends being connected on transformer T after the coils connected in series of described overvoltage protection test switch LS2 and A.C. contactor KM2;
Described under-voltage protection hookup comprises reducing transformer TC2, A.C. contactor KM3 for 380V voltage being reduced to 220V and under-voltage protection test switch LS3, described reducing transformer TC2 and A.C. contactor KM3 often open main contacts series connection after and A.C. contactor KM1 often open main contact parallel, between the first group of secondary coil two ends being connected on transformer T after the coils connected in series of described under-voltage protection test switch LS3 and A.C. contactor KM3;
Be connected on after the coils connected in series of the normally closed auxiliary contact of described A.C. contactor KM2, the normally closed auxiliary contact of A.C. contactor KM3 and A.C. contactor KM1 between first group of secondary coil of transformer T and the output terminal of feed protection CPU module;
Described overload protection hookup comprises synchronous motor microcomputer excitation controller and overload protection test switch LS1, the positive source of described synchronous motor microcomputer excitation controller is connected with one end of first group of secondary coil of transformer T by overload protection test switch LS1, and the power cathode of described synchronous motor microcomputer excitation controller connects with the other end of first group of secondary coil of transformer T;
Described short-circuit protection hookup is made up of short-circuit protection test switch LS4, one end of described short-circuit protection test switch LS4 connects with the link of the B phase line of 380V three-phase alternating-current supply with three-phase alternating voltage mutual inductor TV, and the other end of described short-circuit protection test switch LS4 connects with the link of the A phase line of 380V three-phase alternating-current supply with three-phase alternating voltage mutual inductor TV;
Described earth leakage protection hookup comprises leak(age) test resistance R1 and earth leakage protection test switch LS5, one end after described leak(age) test resistance R1 and earth leakage protection test switch LS5 connects connects with the link of the A phase line of 380V three-phase alternating-current supply with three-phase alternating voltage mutual inductor TV, and the other end connects and ground connection with the earth terminal of feed protection CPU module;
Described three-phase imbalance protection test circuit is made up of three-phase imbalance protection test switch LS6; one end of described three-phase imbalance protection test switch LS6 connects with the link of the B phase line of 380V three-phase alternating-current supply with three-phase alternating voltage mutual inductor TV, and the other end of described three-phase imbalance protection test switch LS6 connects and ground connection with the earth terminal of feed protection CPU module.
Above-mentioned a kind of mining electromagnetic starter Integrated Protection System test unit, is characterized in that: described shaft coupling is spline shaft coupling.
Above-mentioned a kind of mining electromagnetic starter Integrated Protection System test unit, is characterized in that: described feed protection CPU module is LM3108K module.
Above-mentioned a kind of mining electromagnetic starter Integrated Protection System test unit, it is characterized in that: the output terminal of described three-phase ac current transformer TA connects with the IA input end of described LM3108K module, IB input end and IC input end, the output terminal of described zero sequence current mutual inductor LB connects with the I0 input end of described LM3108K module, and the output terminal of described three-phase alternating voltage mutual inductor TV connects with the UA input end of described LM3108K module, UB input end and UC input end; The primary coil of described three-phase alternating voltage mutual inductor TV is connected with the RL input end of described LM3108K module by insulation resistance R2, the 3M common port of described LM3108K module connects with one end of second group of secondary coil of transformer T, and the US system voltage end of described LM3108K module connects with the other end of second group of secondary coil of transformer T.
Above-mentioned a kind of mining electromagnetic starter Integrated Protection System test unit; it is characterized in that: described one end of instantaneous starting button SB1 connects with the output terminal DC24V of 24V direct supply, the other end of described instantaneous starting button SB1 connects with 0.1 input end of described LM3108K module.
Above-mentioned a kind of mining electromagnetic starter Integrated Protection System test unit; it is characterized in that: described one end of instantaneous stop button SB2 connects with the output terminal DC24V of 24V direct supply, the other end of described instantaneous stop button SB2 connects with 0.3 input end of described LM3108K module.
Above-mentioned a kind of mining electromagnetic starter Integrated Protection System test unit; it is characterized in that: the 0.0+ output terminal of described LM3108K module connects with one end of first group of secondary coil of transformer T, described normal run indicator HG is connected between the other end of first group of secondary coil of transformer T and the 0.0-output terminal of described LM3108K module.
Above-mentioned a kind of mining electromagnetic starter Integrated Protection System test unit, is characterized in that: be connected between the other end of first group of secondary coil of transformer T and the 0.0-output terminal of described LM3108K module after the coils connected in series of the normally closed auxiliary contact of described A.C. contactor KM2, the normally closed auxiliary contact of A.C. contactor KM3 and A.C. contactor KM1.
Above-mentioned a kind of mining electromagnetic starter Integrated Protection System test unit; it is characterized in that: the 0.1+ output terminal of described LM3108K module connects with one end of first group of secondary coil of transformer T, described malfunction indicator lamp HR is connected between the other end of first group of secondary coil of transformer T and the 0.1-output terminal of described LM3108K module.
Above-mentioned a kind of mining electromagnetic starter Integrated Protection System test unit, is characterized in that: described synchronous motor microcomputer excitation controller is WLK-B type synchronous motor microcomputer excitation controller.
The utility model compared with prior art has the following advantages:
1, structure of the present utility model is simple, reasonable in design, and it is convenient to realize.
2, complete function of the present utility model; overvoltage protection, under-voltage protection, overload protection, short-circuit protection, earth leakage protection and three-phase imbalance protection test can be carried out; can be used in testing before mining electromagnetic starter protection system comes into operation; lay a good foundation for finally realizing the overvoltage protection of mining electromagnetic starter, under-voltage protection, overload protection, short-circuit protection, earth leakage protection and three-phase imbalance protection; to guaranteeing that Safety of Coal Mine Production has vital role, breaking down after mining electromagnetic starter protection system can be avoided to use and bringing loss.
3, the utility model adopts three-phase ac current transformer TA to gather three-phase current signal; and adopt three-phase alternating voltage mutual inductor TV to gather three-phase voltage signal; ensure that the accuracy of three-phase current signal and three-phase voltage signal image data, contribute to the reliability improving protection test.
4, of the present utility model practical, application value is high.
In sum, structure of the present utility model is simple, and it is convenient to realize, and use easy to operate, complete function, for the integrated protection finally realizing mining electromagnetic starter is laid a good foundation, practical, application value is high.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model mining electromagnetic starter analog platform.
Fig. 2 is the circuit theory diagrams of the utility model mining electromagnetic starter Integrated Protection System mimic channel.
Description of reference numerals:
1-three-phase AC asynchronous motor; 2-shaft coupling; 3-380V three-phase alternating-current supply;
4-magnetic powder brake; 5-mounting seat; 6-text display;
7-synchronous motor microcomputer excitation controller.
Embodiment
As depicted in figs. 1 and 2, the utility model comprises mining electromagnetic starter analog platform and mining electromagnetic starter Integrated Protection System mimic channel, described mining electromagnetic starter analog platform comprises mounting seat 5 and the three-phase AC asynchronous motor 1 that is arranged in mounting seat 5 and magnetic powder brake 4, and the output shaft of described three-phase AC asynchronous motor 1 is connected with the input shaft of magnetic powder brake 4 by shaft coupling 2;
Described mining electromagnetic starter Integrated Protection System mimic channel comprises motor circuit, feed protection CPU module, overvoltage protection hookup, under-voltage protection hookup, overload protection hookup, short-circuit protection hookup, earth leakage protection hookup and three-phase imbalance protection test circuit, and the text display 6 to connect with feed protection CPU module and 24V direct supply, described feed protection CPU module and text display 6 all connect with the output terminal DC24V of 24V direct supply;
Described motor circuit comprise 380V three-phase alternating-current supply 3 and A.C. contactor KM1,380V three-phase alternating-current supply 3 through A.C. contactor KM1 often open main contacts after connect with three-phase AC asynchronous motor 1 through normally closed air switch QS again, C phase line and the A phase line of described 380V three-phase alternating-current supply 3 are also connected with transformer T through disconnector GK, and first group of secondary coil of described transformer T exports 220V voltage, and second group of secondary coil of described transformer T exports 10V voltage, often opening on circuit that main contacts is connected with air switch QS of described A.C. contactor KM1 is connected with three-phase ac current transformer TA, zero sequence current mutual inductor LB and three-phase alternating voltage mutual inductor TV, the output terminal of described three-phase ac current transformer TA, the output terminal of zero sequence current mutual inductor LB and the output terminal of three-phase alternating voltage mutual inductor TV all connect with the input end of feed protection CPU module, the primary coil of described three-phase alternating voltage mutual inductor TV is connected with the input end of feed protection CPU module by insulation resistance R2, one end of described insulation resistance R2 is by electric capacity C1 ground connection, the other end of described insulation resistance R2 is by electric capacity C2 ground connection, the common port of the common port of described three-phase ac current transformer TA, the common port of zero sequence current mutual inductor LB and three-phase alternating voltage mutual inductor TV all connects with the common port of feed protection CPU module, the common port of feed protection CPU module connects with one end of second group of secondary coil of transformer T, and the system voltage end of feed protection CPU module connects with the other end of second group of secondary coil of transformer T, the input end of described feed protection CPU module is also connected to instantaneous starting button SB1 and instantaneous stop button SB2, and the output terminal of described feed protection CPU module is connected to normal run indicator HG and malfunction indicator lamp HR,
Described overvoltage protection hookup comprises stepup transformer TC1, A.C. contactor KM2 for 380V voltage being elevated to 660V and overvoltage protection test switch LS2, described stepup transformer TC1 and A.C. contactor KM2 often open main contacts series connection after and A.C. contactor KM1 often open main contact parallel, between the first group of secondary coil two ends being connected on transformer T after the coils connected in series of described overvoltage protection test switch LS2 and A.C. contactor KM2;
Described under-voltage protection hookup comprises reducing transformer TC2, A.C. contactor KM3 for 380V voltage being reduced to 220V and under-voltage protection test switch LS3, described reducing transformer TC2 and A.C. contactor KM3 often open main contacts series connection after and A.C. contactor KM1 often open main contact parallel, between the first group of secondary coil two ends being connected on transformer T after the coils connected in series of described under-voltage protection test switch LS3 and A.C. contactor KM3;
Be connected on after the coils connected in series of the normally closed auxiliary contact of described A.C. contactor KM2, the normally closed auxiliary contact of A.C. contactor KM3 and A.C. contactor KM1 between first group of secondary coil of transformer T and the output terminal of feed protection CPU module;
Described overload protection hookup comprises synchronous motor microcomputer excitation controller 7 and overload protection test switch LS1, the positive source of described synchronous motor microcomputer excitation controller 7 is connected with one end of first group of secondary coil of transformer T by overload protection test switch LS1, and the power cathode of described synchronous motor microcomputer excitation controller 7 connects with the other end of first group of secondary coil of transformer T;
Described short-circuit protection hookup is made up of short-circuit protection test switch LS4, one end of described short-circuit protection test switch LS4 connects with the link of the B phase line of 380V three-phase alternating-current supply 3 with three-phase alternating voltage mutual inductor TV, and the other end of described short-circuit protection test switch LS4 connects with the link of the A phase line of 380V three-phase alternating-current supply 3 with three-phase alternating voltage mutual inductor TV;
Described earth leakage protection hookup comprises leak(age) test resistance R1 and earth leakage protection test switch LS5, one end after described leak(age) test resistance R1 and earth leakage protection test switch LS5 connects connects with the link of the A phase line of 380V three-phase alternating-current supply 3 with three-phase alternating voltage mutual inductor TV, and the other end connects and ground connection with the earth terminal of feed protection CPU module;
Described three-phase imbalance protection test circuit is made up of three-phase imbalance protection test switch LS6; one end of described three-phase imbalance protection test switch LS6 connects with the link of the B phase line of 380V three-phase alternating-current supply 3 with three-phase alternating voltage mutual inductor TV, and the other end of described three-phase imbalance protection test switch LS6 connects and ground connection with the earth terminal of feed protection CPU module.
In the present embodiment, described shaft coupling is spline shaft coupling.
As shown in Figure 2, in the present embodiment, described feed protection CPU module is LM3108K module.
As shown in Figure 2, in the present embodiment, the output terminal of described three-phase ac current transformer TA connects with the IA input end of described LM3108K module, IB input end and IC input end, the output terminal of described zero sequence current mutual inductor LB connects with the I0 input end of described LM3108K module, and the output terminal of described three-phase alternating voltage mutual inductor TV connects with the UA input end of described LM3108K module, UB input end and UC input end; The primary coil of described three-phase alternating voltage mutual inductor TV is connected with the RL input end of described LM3108K module by insulation resistance R2, the 3M common port of described LM3108K module connects with one end of second group of secondary coil of transformer T, and the US system voltage end of described LM3108K module connects with the other end of second group of secondary coil of transformer T.
As shown in Figure 2, in the present embodiment, described one end of instantaneous starting button SB1 connects with the output terminal DC24V of 24V direct supply, and the other end of described instantaneous starting button SB1 connects with 0.1 input end of described LM3108K module.Described one end of instantaneous stop button SB2 connects with the output terminal DC24V of 24V direct supply, and the other end of described instantaneous stop button SB2 connects with 0.3 input end of described LM3108K module.
As shown in Figure 2, in the present embodiment, the 0.0+ output terminal of described LM3108K module connects with one end of first group of secondary coil of transformer T, and described normal run indicator HG is connected between the other end of first group of secondary coil of transformer T and the 0.0-output terminal of described LM3108K module.Be connected between the other end of first group of secondary coil of transformer T and the 0.0-output terminal of described LM3108K module after the coils connected in series of the normally closed auxiliary contact of described A.C. contactor KM2, the normally closed auxiliary contact of A.C. contactor KM3 and A.C. contactor KM1.
As shown in Figure 2, in the present embodiment, the 0.1+ output terminal of described LM3108K module connects with one end of first group of secondary coil of transformer T, and described malfunction indicator lamp HR is connected between the other end of first group of secondary coil of transformer T and the 0.1-output terminal of described LM3108K module.
In the present embodiment, described synchronous motor microcomputer excitation controller 7 is WLK-B type synchronous motor microcomputer excitation controller.
During concrete enforcement, the rated voltage of described three-phase AC asynchronous motor 1 is 380V, and rated current is 2.1A, and rated power is 750W, and the nominal torque of described magnetic powder brake 4 is 20Nm.The primary coil of described transformer T is connected with disconnector GK by fuse FU1, and first group of secondary coil of described transformer T is connected with other each parts by fuse FU2.The resistance of described leak(age) test resistance R1 is 3.5K Ω.
As shown in Figure 2, when the utility model uses, after closed disconnector GK, the 380V voltage that 380V three-phase alternating-current supply 3 exports by transformer T reduces to 220V and 10V two step voltage, for 220V voltage, when pressing instantaneous starting button SB1, the switch that described LM3108K inside modules is connected between its 0.0+ output terminal and 0.0-output terminal closes, the coil of A.C. contactor KM1 obtains electric, the main contacts of often opening of A.C. contactor KM1 closes, three-phase AC asynchronous motor 1 starts running, normal run indicator HG lights, instruction three-phase AC asynchronous motor 1 normally runs, the switch that described LM3108K inside modules is connected between its 0.1+ output terminal and 0.1-output terminal disconnects, and malfunction indicator lamp HR does not work, simultaneously, the A phase current signal IA that three-phase ac current transformer TA is collected, B phase current signal IB and C phase current signal IC exports to described LM3108K module, the A phase voltage signal UA that three-phase alternating voltage mutual inductor TV is collected, B phase voltage signal UB and C phase voltage signal UC exports to described LM3108K module, the zero sequence current signal I 0 that zero sequence current mutual inductor LB is collected exports to described LM3108K module, the three-phase electricity that insulation resistance R2 is collected over the ground resistance exports to described LM3108K module, text display 6 shows the three-phase voltage under three-phase AC asynchronous motor 1 normal operating condition, three-phase current and power factor parameter.
Under three-phase AC asynchronous motor 1 normal operating condition, can carry out overvoltage protection, under-voltage protection, overload protection, short-circuit protection, earth leakage protection and three-phase imbalance protection test, concrete process of the test is as follows:
(1) overvoltage protection: disconnect air switch QS, three-phase AC asynchronous motor 1 quits work, manual closing overvoltage protection test switch LS2, the coil of A.C. contactor KM2 obtains electric, the normally closed auxiliary contact of A.C. contactor KM2 disconnects, the coil losing electricity of A.C. contactor KM1, the main contacts of often opening of A.C. contactor KM1 disconnects, the main contacts of often opening of A.C. contactor KM2 closes, stepup transformer TC1 exports after 380V voltage is elevated to 660V, now, the three-phase alternating voltage mutual inductor TV that described LM3108K module receives exports to its A phase voltage signal UA, B phase voltage signal UB and C phase voltage signal UC raises and has exceeded 120% (456V) of the rated voltage 380V of three-phase AC asynchronous motor 1, the switch that described LM3108K inside modules is connected between its 0.0+ output terminal and 0.0-output terminal disconnects, normal run indicator HG extinguishes, simultaneously, the switch that described LM3108K inside modules is connected between its 0.1+ output terminal and 0.1-output terminal closes, malfunction indicator lamp HR lights, it is overvoltage that text display 6 shows fault type.
(2) under-voltage protection: disconnect air switch QS, three-phase AC asynchronous motor 1 quits work, manual closing under-voltage protection test switch LS3, the coil of A.C. contactor KM3 obtains electric, the normally closed auxiliary contact of A.C. contactor KM3 disconnects, the coil losing electricity of A.C. contactor KM1, the main contacts of often opening of A.C. contactor KM1 disconnects, the main contacts of often opening of A.C. contactor KM3 closes, reducing transformer TC2 exports after 380V voltage is reduced to 220V, now, the three-phase alternating voltage mutual inductor TV that described LM3108K module receives exports to its A phase voltage signal UA, B phase voltage signal UB and C phase voltage signal UC reduce and 70% (266V) of rated voltage 380V lower than three-phase AC asynchronous motor 1, the switch that described LM3108K inside modules is connected between its 0.0+ output terminal and 0.0-output terminal disconnects, normal run indicator HG extinguishes, simultaneously, the switch that described LM3108K inside modules is connected between its 0.1+ output terminal and 0.1-output terminal closes, malfunction indicator lamp HR lights, it is under-voltage that text display 6 shows fault type.
(3) overload protection: manual closing overload protection test switch LS1, synchronous motor microcomputer excitation controller 7 provides exciting curent for magnetic powder brake 4, exciting curent is directly proportional to the torque of magnetic powder brake 4, when exciting curent is 0.6A, the torque of magnetic powder brake 4 is nominal torque 20Nm, increase exciting curent, the torque of magnetic powder brake 4 is increased, the torque of magnetic powder brake 4 inputs to three-phase AC asynchronous motor 1 by the second shaft coupling 3 and the first shaft coupling 2, along with the torque of magnetic powder brake 4 increases, three-phase AC asynchronous motor 1 is caused to be in overload, now, the three-phase ac current transformer TA that described LM3108K module receives exports to its A phase current signal IA, B phase current signal IB and C phase current signal IC has all exceeded default overload current threshold value, the switch that described LM3108K inside modules is connected between its 0.0+ output terminal and 0.0-output terminal disconnects, normal run indicator HG extinguishes, simultaneously, the switch that described LM3108K inside modules is connected between its 0.1+ output terminal and 0.1-output terminal closes, malfunction indicator lamp HR lights, text display 6 shows fault type for overload.
(4) short-circuit protection: manual closing short-circuit protection test switch LS4, the A phase line of 380V three-phase alternating-current supply 3 and B phase line are connected, now, the three-phase ac current transformer TA that described LM3108K module receives exports to its A phase current signal IA, the current amplitude of B phase current signal IB and C phase current signal IC has exceeded the short-circuit current threshold value preset, the switch that described LM3108K inside modules is connected between its 0.0+ output terminal and 0.0-output terminal disconnects, normal run indicator HG extinguishes, simultaneously, the switch that described LM3108K inside modules is connected between its 0.1+ output terminal and 0.1-output terminal closes, malfunction indicator lamp HR lights, it is short circuit that text display 6 shows fault type.
(5) earth leakage protection: manual closing earth leakage protection test switch LS5, A phase line and the leak(age) test resistance R1 of 380V three-phase alternating-current supply 3 connect, now, the zero sequence current signal I0 that the zero sequence current mutual inductor LB that described LM3108K module receives exports to it has exceeded default zero-sequence current threshold value, and the insulation resistance R2 that described LM3108K module receives export to it three-phase electricity over the ground resistance exceeded default three-phase electricity resistance threshold value over the ground, the switch that described LM3108K inside modules is connected between its 0.0+ output terminal and 0.0-output terminal disconnects, normal run indicator HG extinguishes, simultaneously, the switch that described LM3108K inside modules is connected between its 0.1+ output terminal and 0.1-output terminal closes, malfunction indicator lamp HR lights, text display 6 shows fault type for electric leakage.
(6) three-phase imbalance protection: manual closing three-phase imbalance protection test switch LS6, the B phase line of 380V three-phase alternating-current supply 3 is connected with ground, now, the three-phase ac current transformer TA that described LM3108K module receives exports to its B phase current signal IB lower than 0.6 times of rated current (1.26A), and the three-phase ac current transformer TA received when described LM3108K module export to its A phase current signal IA equal with C phase current signal IC after, the switch that described LM3108K inside modules is connected between its 0.0+ output terminal and 0.0-output terminal disconnects, normal run indicator HG extinguishes, simultaneously, the switch that described LM3108K inside modules is connected between its 0.1+ output terminal and 0.1-output terminal closes, malfunction indicator lamp HR lights, it is three-phase imbalance that text display 6 shows fault type.
In addition, when pressing instantaneous stop button SB2, the switch that described LM3108K inside modules is connected between its 0.0+ output terminal and 0.0-output terminal disconnects, the coil losing electricity of A.C. contactor KM1, the main contacts of often opening of A.C. contactor KM1 disconnects, three-phase AC asynchronous motor 1 quits work, normal run indicator HG extinguishes, simultaneously, the switch that described LM3108K inside modules is connected between its 0.1+ output terminal and 0.1-output terminal disconnects, malfunction indicator lamp HR extinguishes, and the information before instantaneous stop button SB2 is pressed in text display display.When disconnecting disconnector GK, mining electromagnetic starter Integrated Protection System mimic channel quits work.
The above; it is only preferred embodiment of the present utility model; not the utility model is imposed any restrictions; every above embodiment is done according to the utility model technical spirit any simple modification, change and equivalent structure change, all still belong in the protection domain of technical solutions of the utility model.
Claims (10)
1. a mining electromagnetic starter Integrated Protection System test unit, it is characterized in that: comprise mining electromagnetic starter analog platform and mining electromagnetic starter Integrated Protection System mimic channel, described mining electromagnetic starter analog platform comprises mounting seat (5) and the three-phase AC asynchronous motor (1) that is arranged in mounting seat (5) and magnetic powder brake (4), and the output shaft of described three-phase AC asynchronous motor (1) is connected with the input shaft of magnetic powder brake (4) by shaft coupling (2);
Described mining electromagnetic starter Integrated Protection System mimic channel comprises motor circuit, feed protection CPU module, overvoltage protection hookup, under-voltage protection hookup, overload protection hookup, short-circuit protection hookup, earth leakage protection hookup and three-phase imbalance protection test circuit, and the text display (6) to connect with feed protection CPU module and 24V direct supply, described feed protection CPU module and text display (6) all connect with the output terminal DC24V of 24V direct supply;
Described motor circuit comprise 380V three-phase alternating-current supply (3) and A.C. contactor KM1,380V three-phase alternating-current supply (3) through A.C. contactor KM1 often open main contacts after connect with three-phase AC asynchronous motor (1) through normally closed air switch QS again, C phase line and the A phase line of described 380V three-phase alternating-current supply (3) are also connected with transformer T through disconnector GK, and first group of secondary coil of described transformer T exports 220V voltage, and second group of secondary coil of described transformer T exports 10V voltage, often opening on circuit that main contacts is connected with air switch QS of described A.C. contactor KM1 is connected with three-phase ac current transformer TA, zero sequence current mutual inductor LB and three-phase alternating voltage mutual inductor TV, the output terminal of described three-phase ac current transformer TA, the output terminal of zero sequence current mutual inductor LB and the output terminal of three-phase alternating voltage mutual inductor TV all connect with the input end of feed protection CPU module, the primary coil of described three-phase alternating voltage mutual inductor TV is connected with the input end of feed protection CPU module by insulation resistance R2, one end of described insulation resistance R2 is by electric capacity C1 ground connection, the other end of described insulation resistance R2 is by electric capacity C2 ground connection, the common port of the common port of described three-phase ac current transformer TA, the common port of zero sequence current mutual inductor LB and three-phase alternating voltage mutual inductor TV all connects with the common port of feed protection CPU module, the common port of feed protection CPU module connects with one end of second group of secondary coil of transformer T, and the system voltage end of feed protection CPU module connects with the other end of second group of secondary coil of transformer T, the input end of described feed protection CPU module is also connected to instantaneous starting button SB1 and instantaneous stop button SB2, and the output terminal of described feed protection CPU module is connected to normal run indicator HG and malfunction indicator lamp HR,
Described overvoltage protection hookup comprises stepup transformer TC1, A.C. contactor KM2 for 380V voltage being elevated to 660V and overvoltage protection test switch LS2, described stepup transformer TC1 and A.C. contactor KM2 often open main contacts series connection after and A.C. contactor KM1 often open main contact parallel, between the first group of secondary coil two ends being connected on transformer T after the coils connected in series of described overvoltage protection test switch LS2 and A.C. contactor KM2;
Described under-voltage protection hookup comprises reducing transformer TC2, A.C. contactor KM3 for 380V voltage being reduced to 220V and under-voltage protection test switch LS3, described reducing transformer TC2 and A.C. contactor KM3 often open main contacts series connection after and A.C. contactor KM1 often open main contact parallel, between the first group of secondary coil two ends being connected on transformer T after the coils connected in series of described under-voltage protection test switch LS3 and A.C. contactor KM3;
Be connected on after the coils connected in series of the normally closed auxiliary contact of described A.C. contactor KM2, the normally closed auxiliary contact of A.C. contactor KM3 and A.C. contactor KM1 between first group of secondary coil of transformer T and the output terminal of feed protection CPU module;
Described overload protection hookup comprises synchronous motor microcomputer excitation controller (7) and overload protection test switch LS1, the positive source of described synchronous motor microcomputer excitation controller (7) is connected with one end of first group of secondary coil of transformer T by overload protection test switch LS1, and the described power cathode of synchronous motor microcomputer excitation controller (7) connects with the other end of first group of secondary coil of transformer T;
Described short-circuit protection hookup is made up of short-circuit protection test switch LS4, one end of described short-circuit protection test switch LS4 connects with the link of the B phase line of 380V three-phase alternating-current supply (3) with three-phase alternating voltage mutual inductor TV, and the other end of described short-circuit protection test switch LS4 connects with the link of the A phase line of 380V three-phase alternating-current supply (3) with three-phase alternating voltage mutual inductor TV;
Described earth leakage protection hookup comprises leak(age) test resistance R1 and earth leakage protection test switch LS5, one end after described leak(age) test resistance R1 and earth leakage protection test switch LS5 connects connects with the link of the A phase line of 380V three-phase alternating-current supply (3) with three-phase alternating voltage mutual inductor TV, and the other end connects and ground connection with the earth terminal of feed protection CPU module;
Described three-phase imbalance protection test circuit is made up of three-phase imbalance protection test switch LS6; one end of described three-phase imbalance protection test switch LS6 connects with the link of the B phase line of 380V three-phase alternating-current supply (3) with three-phase alternating voltage mutual inductor TV, and the other end of described three-phase imbalance protection test switch LS6 connects and ground connection with the earth terminal of feed protection CPU module.
2. according to a kind of mining electromagnetic starter Integrated Protection System test unit according to claim 1, it is characterized in that: described shaft coupling (2) is spline shaft coupling.
3., according to a kind of mining electromagnetic starter Integrated Protection System test unit according to claim 1, it is characterized in that: described feed protection CPU module is LM3108K module.
4. according to a kind of mining electromagnetic starter Integrated Protection System test unit according to claim 3, it is characterized in that: the output terminal of described three-phase ac current transformer TA connects with the IA input end of described LM3108K module, IB input end and IC input end, the output terminal of described zero sequence current mutual inductor LB connects with the I0 input end of described LM3108K module, and the output terminal of described three-phase alternating voltage mutual inductor TV connects with the UA input end of described LM3108K module, UB input end and UC input end; The primary coil of described three-phase alternating voltage mutual inductor TV is connected with the RL input end of described LM3108K module by insulation resistance R2, the 3M common port of described LM3108K module connects with one end of second group of secondary coil of transformer T, and the US system voltage end of described LM3108K module connects with the other end of second group of secondary coil of transformer T.
5. according to a kind of mining electromagnetic starter Integrated Protection System test unit according to claim 3; it is characterized in that: described one end of instantaneous starting button SB1 connects with the output terminal DC24V of 24V direct supply, the other end of described instantaneous starting button SB1 connects with 0.1 input end of described LM3108K module.
6. according to a kind of mining electromagnetic starter Integrated Protection System test unit according to claim 3; it is characterized in that: described one end of instantaneous stop button SB2 connects with the output terminal DC24V of 24V direct supply, the other end of described instantaneous stop button SB2 connects with 0.3 input end of described LM3108K module.
7. according to a kind of mining electromagnetic starter Integrated Protection System test unit according to claim 3; it is characterized in that: the 0.0+ output terminal of described LM3108K module connects with one end of first group of secondary coil of transformer T, described normal run indicator HG is connected between the other end of first group of secondary coil of transformer T and the 0.0-output terminal of described LM3108K module.
8. according to a kind of mining electromagnetic starter Integrated Protection System test unit according to claim 7, it is characterized in that: be connected between the other end of first group of secondary coil of transformer T and the 0.0-output terminal of described LM3108K module after the coils connected in series of the normally closed auxiliary contact of described A.C. contactor KM2, the normally closed auxiliary contact of A.C. contactor KM3 and A.C. contactor KM1.
9. according to a kind of mining electromagnetic starter Integrated Protection System test unit according to claim 3; it is characterized in that: the 0.1+ output terminal of described LM3108K module connects with one end of first group of secondary coil of transformer T, described malfunction indicator lamp HR is connected between the other end of first group of secondary coil of transformer T and the 0.1-output terminal of described LM3108K module.
10. according to a kind of mining electromagnetic starter Integrated Protection System test unit according to claim 1, it is characterized in that: described synchronous motor microcomputer excitation controller (7) is WLK-B type synchronous motor microcomputer excitation controller.
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| CN201520221513.5U CN204515046U (en) | 2015-04-13 | 2015-04-13 | A kind of mining electromagnetic starter Integrated Protection System test unit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110031706A (en) * | 2019-04-30 | 2019-07-19 | 上海世兆新能源科技有限公司绍兴分公司 | The limit test system of wisdom Electrical Safety management system |
| CN110531260A (en) * | 2019-08-23 | 2019-12-03 | 人本集团有限公司 | Micro-machine driveability test macro |
| CN110927434A (en) * | 2020-02-13 | 2020-03-27 | 天津美腾科技股份有限公司 | Discharge test circuit and discharge test device |
-
2015
- 2015-04-13 CN CN201520221513.5U patent/CN204515046U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110031706A (en) * | 2019-04-30 | 2019-07-19 | 上海世兆新能源科技有限公司绍兴分公司 | The limit test system of wisdom Electrical Safety management system |
| CN110531260A (en) * | 2019-08-23 | 2019-12-03 | 人本集团有限公司 | Micro-machine driveability test macro |
| CN110927434A (en) * | 2020-02-13 | 2020-03-27 | 天津美腾科技股份有限公司 | Discharge test circuit and discharge test device |
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