CN203759121U - Electric power voltage transformer winding direct current resistance tester - Google Patents
Electric power voltage transformer winding direct current resistance tester Download PDFInfo
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- CN203759121U CN203759121U CN201420086156.1U CN201420086156U CN203759121U CN 203759121 U CN203759121 U CN 203759121U CN 201420086156 U CN201420086156 U CN 201420086156U CN 203759121 U CN203759121 U CN 203759121U
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- 238000004804 winding Methods 0.000 title claims abstract description 91
- 238000005259 measurement Methods 0.000 claims abstract description 93
- 230000007935 neutral effect Effects 0.000 claims description 36
- 238000012360 testing method Methods 0.000 abstract description 16
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- 238000005516 engineering process Methods 0.000 description 2
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Abstract
The utility model relates to an electric power voltage transformer winding direct current resistance tester comprising a main controller U1, a direct current resistance measuring module U2, a change-over switch module U3 and an electric mechanism controller U4, wherein the electric mechanism controller U4 comprises a power supply module U4-1, an lift control module U4-2, a descent control module U4-3 and a time-delay module U4-4. The beneficial effects of the electric power voltage transformer winding direct current resistance tester are that the direct current resistance of an electric power voltage transformer can be automatically measured, manual work is not needed for tester operation and test connection wire replacement in a whole testing process, test efficiency is substantially raised, test time is saved, measurement errors are reduced, work intensity is lowered, and work efficiency is improved.
Description
Technical field
The utility model belongs to power equipment field of measuring technique, relates to a kind of Winding in Power Transformer direct resistance metering instrument.
Background technology
Power transformer is the major equipment of electric system, significant for power grid security operation reliably, in 18 great electrical network anti-accident measures of national grid, explicitly point out, DC resistance of power transformer is tested as transformer conventionally test project, being transformer requisite pilot project after handing-over, overhaul and change shunting switch, is also the important inspection item after fault.
According to standard GB/T 50150-2006 " Erection works of electrical installations Standard for handover test of electric equipment " requirement, for the Transformer Winding with load ratio bridging switch, the direct current resistance of measuring winding and sleeve should carry out on all positions of each tap, and simultaneously non-tested winding requires open circuit.As mentioned above, if intactly measure the resistance of the large-scale power transformer value with a multiple windings and shunting switch pilot project, just likely need repeatedly to climb up transformer, tens of dismounting connecting lines, because high-power transformer is bulky, adopt manual type to disconnect p-wire and not only waste time and energy, but also the wiring that very likely makes a mistake, thereby cause the even hidden danger in safety of error in measurement.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of Winding in Power Transformer direct resistance metering instrument without disconnect line in middle measuring process.
For solving the problems of the technologies described above taked technical scheme be: a kind of Winding in Power Transformer direct resistance metering instrument, comprises master controller U1, directly hinders measurement module U2, change-over switch module U3 and motor drive mechanism controller U4; Described motor drive mechanism controller U4 comprises power module U4-1, rises control module U4-2, falls control module U4-3 and time delay module U4-4;
The winding casing tube outlet terminal of power transformer T connects the corresponding port of described straight resistance measurement module U2 through meeting described change-over switch module U3; The two-way connection of corresponding PORT COM of the PORT COM of described straight resistance measurement module U2 and described master controller U1; Described power module U4-1, rise control module U4-2, corresponding PORT COM that the control signal input end that falls control module U4-3, time delay module U4-4 and change-over switch module U3 meets respectively described master controller U1; Described power module U4-1, rise control module U4-2, respective input that the control signal output terminal that falls control module U4-3 and time delay module U4-4 meets respectively the load ratio bridging switch motor drive mechanism FJKG of power transformer T.
Described change-over switch module U3 comprises relay J 1-J25;
The swing arm J1-1 of described relay J 1 meets the high pressure A phase winding sleeve pipe outlet terminal A of power transformer T
h; The stationary contact J1-2 of described relay J 1 meets the high pressure A phase current signal output terminal IAH of described straight resistance measurement module U2;
The stationary contact J1-3 of described relay J 1 is through the contact of described relay J 13 J13-1 ground connection;
The high pressure A phase winding sleeve pipe outlet terminal A of a termination power transformer T of the normally closed contact J14-1 of described relay J 14
h; The high pressure A phase voltage signal output terminal VAH of straight resistance measurement module U2 described in another termination of the normally closed contact J14-1 of described relay J 14; The normally opened contact J14-2 of described relay J 14 is unsettled;
The swing arm J2-1 of described relay J 2 meets the high pressure B phase winding sleeve pipe outlet terminal B of power transformer T
h; The stationary contact J2-2 of described relay J 2 meets the high pressure B phase current signal output terminal IBH of described straight resistance measurement module U2;
The stationary contact J2-3 of described relay J 2 is through the contact of described relay J 13 J13-1 ground connection;
The high pressure B phase winding sleeve pipe outlet terminal B of a termination power transformer T of the normally closed contact J15-1 of described relay J 15
h; The high pressure B phase voltage signal output terminal VBH of straight resistance measurement module U2 described in another termination of the normally closed contact J15-1 of described relay J 15; The normally opened contact J15-2 of described relay J 15 is unsettled;
The swing arm J3-1 of described relay J 3 meets the high pressure C phase winding sleeve pipe outlet terminal C of power transformer T
h; The stationary contact J3-2 of described relay J 3 meets the high pressure C phase current signal output terminal ICH of described straight resistance measurement module U2;
The stationary contact J3-3 of described relay J 3 is through the contact of described relay J 13 J13-1 ground connection;
The high pressure C phase winding sleeve pipe outlet terminal C of a termination power transformer T of the normally closed contact J16-1 of described relay J 16
h; The high pressure C phase voltage signal output terminal VCH of straight resistance measurement module U2 described in another termination of the normally closed contact J16-1 of described relay J 16; The normally opened contact J16-2 of described relay J 16 is unsettled;
The swing arm J4-1 of described relay J 4 meets the high pressure neutral bushing outlet terminal O of power transformer T
h; The stationary contact J4-2 of described relay J 4 meets the high pressure neutral point current signal input part IOH of described straight resistance measurement module U2;
The stationary contact J4-3 of described relay J 4 is through the contact of described relay J 13 J13-1 ground connection;
The high pressure neutral bushing outlet terminal O of a termination power transformer T of the normally closed contact J17-1 of described relay J 17
h; The high pressure neutral point voltage signal input part VOH of straight resistance measurement module U2 described in another termination of the normally closed contact J17-1 of described relay J 17; The normally opened contact J17-2 of described relay J 17 is unsettled;
The swing arm J5-1 of described relay J 5 meets the middle pressure A phase winding sleeve pipe outlet terminal A of power transformer T
m; The stationary contact J5-2 of described relay J 5 meets the middle pressure A phase current signal output terminal IAM of described straight resistance measurement module U2;
The stationary contact J5-3 of described relay J 5 is through the contact of described relay J 13 J13-1 ground connection;
The middle pressure A phase winding sleeve pipe outlet terminal A of a termination power transformer T of the normally closed contact J18-1 of described relay J 18
m; The middle pressure A phase voltage signal output terminal VAM of straight resistance measurement module U2 described in another termination of the normally closed contact J18-1 of described relay J 18; The normally opened contact J18-2 of described relay J 18 is unsettled;
The swing arm J6-1 of described relay J 6 meets the middle pressure B phase winding sleeve pipe outlet terminal B of power transformer T
m; The stationary contact J6-2 of described relay J 6 meets the middle pressure B phase current signal output terminal IBM of described straight resistance measurement module U2;
The stationary contact J6-3 of described relay J 6 is through the contact of described relay J 13 J13-1 ground connection;
The middle pressure B phase winding sleeve pipe outlet terminal B of a termination power transformer T of the normally closed contact J19-1 of described relay J 19
m; The middle pressure B phase voltage signal output terminal VBM of straight resistance measurement module U2 described in another termination of the normally closed contact J19-1 of described relay J 19; The normally opened contact J19-2 of described relay J 19 is unsettled;
The swing arm J7-1 of described relay J 7 meets the middle pressure C phase winding sleeve pipe outlet terminal C of power transformer T
m; The stationary contact J7-2 of described relay J 7 meets the middle pressure C phase current signal output terminal ICM of described straight resistance measurement module U2;
The stationary contact J7-3 of described relay J 7 is through the contact of described relay J 13 J13-1 ground connection;
The middle pressure C phase winding sleeve pipe outlet terminal C of a termination power transformer T of the normally closed contact J20-1 of described relay J 20
m; The middle pressure C phase voltage signal output terminal VCM of straight resistance measurement module U2 described in another termination of the normally closed contact J20-1 of described relay J 20; The normally opened contact J20-2 of described relay J 20 is unsettled;
The swing arm J8-1 of described relay J 8 meets the middle pressure neutral bushing outlet terminal O of power transformer T
m; The stationary contact J8-2 of described relay J 8 meets the middle pressure neutral point current signal input part IOM of described straight resistance measurement module U2;
The stationary contact J8-3 of described relay J 8 is through the contact of described relay J 13 J13-1 ground connection;
The middle pressure neutral bushing outlet terminal O of a termination power transformer T of the normally closed contact J21-1 of described relay J 21
m; The middle pressure neutral point voltage signal input part VOM of straight resistance measurement module U2 described in another termination of the normally closed contact J21-1 of described relay J 21; The normally opened contact J21-2 of described relay J 21 is unsettled;
The swing arm J9-1 of described relay J 9 meets the low pressure A phase winding sleeve pipe outlet terminal A of power transformer T
l; The stationary contact J9-2 of described relay J 9 meets the low pressure A phase current signal output terminal IAL of described straight resistance measurement module U2;
The stationary contact J9-3 of described relay J 9 is through the contact of described relay J 13 J13-1 ground connection;
The low pressure A phase winding sleeve pipe outlet terminal A of a termination power transformer T of the normally closed contact J22-1 of described relay J 22
l; The low pressure A phase voltage signal output terminal VAL of straight resistance measurement module U2 described in another termination of the normally closed contact J22-1 of described relay J 22; The normally opened contact J22-2 of described relay J 22 is unsettled;
The swing arm J10-1 of described relay J 10 meets the low pressure B phase winding sleeve pipe outlet terminal B of power transformer T
l; The stationary contact J10-2 of described relay J 10 meets the low pressure B phase current signal output terminal IBL of described straight resistance measurement module U2;
The stationary contact J10-3 of described relay J 10 is through the contact of described relay J 13 J13-1 ground connection;
The low pressure B phase winding sleeve pipe outlet terminal B of a termination power transformer T of the normally closed contact J23-1 of described relay J 23
l; The low pressure B phase voltage signal output terminal VBL of straight resistance measurement module U2 described in another termination of the normally closed contact J23-1 of described relay J 23; The normally opened contact J23-2 of described relay J 23 is unsettled;
The swing arm J11-1 of described relay J 11 meets the low pressure C phase winding sleeve pipe outlet terminal C of power transformer T
l; The stationary contact J11-2 of described relay J 11 meets the low pressure C phase current signal output terminal ICL of described straight resistance measurement module U2;
The stationary contact J11-3 of described relay J 11 is through the contact of described relay J 13 J13-1 ground connection;
The low pressure C phase winding sleeve pipe outlet terminal C of a termination power transformer T of the normally closed contact J24-1 of described relay J 24
l; The low pressure C phase voltage signal output terminal VCL of straight resistance measurement module U2 described in another termination of the normally closed contact J24-1 of described relay J 24; The normally opened contact J24-2 of described relay J 24 is unsettled;
The swing arm J12-1 of described relay J 12 meets the low pressure neutral bushing outlet terminal O of power transformer T
l; The stationary contact J12-2 of described relay J 12 meets the low pressure neutral point current signal input part IOL of described straight resistance measurement module U2;
The stationary contact J12-3 of described relay J 12 is through the contact of described relay J 13 J13-1 ground connection;
The low pressure neutral bushing outlet terminal O of a termination power transformer T of the normally closed contact J25-1 of described relay J 25
l; The low pressure neutral point voltage signal input part VOL of straight resistance measurement module U2 described in another termination of the normally closed contact J25-1 of described relay J 25; The normally opened contact J25-2 of described relay J 25 is unsettled;
The control signal input end of the coil of described relay J 1-J25 connects respectively the corresponding PORT COM of described master controller U1.
The model of described master controller U1 is for grinding auspicious T90; The model of described straight resistance measurement module U2 is dr-m; The model of described relay J 1-J25 is G7L-2A-P; Described power module U4-1 is pow-m; The described control module U4-2 that rises is upctl-m; It is described that to fall control module U4-3 be dnctl-m; Described time delay module U4-4 is tdl-m.
The beneficial effect that adopts technique scheme to produce is: the utility model can be realized the automatic measurement to DC resistance of power transformer, only needing primary connection and this device of a key operation can automatically complete shunting switch switches, the work of test connection replacing and direct current resistance m easurem ent, realize the whole measuring process automatic switchover of the automatic switchover winding state of load ratio bridging switch tap position by motor drive mechanism controller, in whole test process, change without manually carrying out test apparatus operation and test connection, greatly improve test efficiency, save test period, on-the-spot test shows, use this device to test Transformer Winding direct current resistance can make test efficiency improve more than 80%, this can not only reduce measuring error, can also alleviate working strength, increase work efficiency.
Brief description of the drawings
Fig. 1 is theory diagram of the present utility model.
Fig. 2 is change-over switch module U3 and three winding power transformer catenation principle figure.
Fig. 3 is that test double winding power transformer directly hinders measuring principle figure.
In Fig. 1-3, U1 is that master controller, U2 are that directly to hinder measurement module, U3 be that change-over switch module, U4 are that motor drive mechanism controller, U4-1 are that power module, U4-2 are that a liter control module, U4-3 are that to fall control module, U4-4 be that time delay module, T are that three winding power transformers, FJKG are that load ratio bridging switch motor drive mechanism, the T1 of three winding power transformer T is that double winding power transformer, FJKG1 are the load ratio bridging switch motor drive mechanism of double winding power transformer T1.
Embodiment
From Fig. 1-2, the present embodiment comprises master controller U1, directly hinders measurement module U2, change-over switch module U3 and motor drive mechanism controller U4; Described motor drive mechanism controller U4 comprises power module U4-1, rises control module U4-2, falls control module U4-3 and time delay module U4-4;
The winding casing tube outlet terminal of three-winding power transformer T connects the corresponding port of described straight resistance measurement module U2 through meeting described change-over switch module U3; The two-way connection of corresponding PORT COM of the PORT COM of described straight resistance measurement module U2 and described master controller U1; Described power module U4-1, rise control module U4-2, corresponding PORT COM that the control signal input end that falls control module U4-3, time delay module U4-4 and change-over switch module U3 meets respectively described master controller U1; Described power module U4-1, rise control module U4-2, respective input that the control signal output terminal that falls control module U4-3 and time delay module U4-4 meets respectively the load ratio bridging switch motor drive mechanism FJKG of three-winding power transformer T.
Described change-over switch module U3 comprises relay J 1-J25;
The swing arm J1-1 of described relay J 1 meets the high pressure A phase winding sleeve pipe outlet terminal A of three-winding power transformer T
h; The stationary contact J1-2 of described relay J 1 meets the high pressure A phase current signal output terminal IAH of described straight resistance measurement module U2;
The stationary contact J1-3 of described relay J 1 is through the contact of described relay J 13 J13-1 ground connection;
The high pressure A phase winding sleeve pipe outlet terminal A of a termination power transformer T of the normally closed contact J14-1 of described relay J 14
h; The high pressure A phase voltage signal output terminal VAH of straight resistance measurement module U2 described in another termination of the normally closed contact J14-1 of described relay J 14; The normally opened contact J14-2 of described relay J 14 is unsettled;
The swing arm J2-1 of described relay J 2 meets the high pressure B phase winding sleeve pipe outlet terminal B of power transformer T
h; The stationary contact J2-2 of described relay J 2 meets the high pressure B phase current signal output terminal IBH of described straight resistance measurement module U2;
The stationary contact J2-3 of described relay J 2 is through the contact of described relay J 13 J13-1 ground connection;
The high pressure B phase winding sleeve pipe outlet terminal B of a termination power transformer T of the normally closed contact J15-1 of described relay J 15
h; The high pressure B phase voltage signal output terminal VBH of straight resistance measurement module U2 described in another termination of the normally closed contact J15-1 of described relay J 15; The normally opened contact J15-2 of described relay J 15 is unsettled;
The swing arm J3-1 of described relay J 3 meets the high pressure C phase winding sleeve pipe outlet terminal C of power transformer T
h; The stationary contact J3-2 of described relay J 3 meets the high pressure C phase current signal output terminal ICH of described straight resistance measurement module U2;
The stationary contact J3-3 of described relay J 3 is through the contact of described relay J 13 J13-1 ground connection;
The high pressure C phase winding sleeve pipe outlet terminal C of a termination power transformer T of the normally closed contact J16-1 of described relay J 16
h; The high pressure C phase voltage signal output terminal VCH of straight resistance measurement module U2 described in another termination of the normally closed contact J16-1 of described relay J 16; The normally opened contact J16-2 of described relay J 16 is unsettled;
The swing arm J4-1 of described relay J 4 meets the high pressure neutral bushing outlet terminal O of power transformer T
h; The stationary contact J4-2 of described relay J 4 meets the high pressure neutral point current signal input part IOH of described straight resistance measurement module U2;
The stationary contact J4-3 of described relay J 4 is through the contact of described relay J 13 J13-1 ground connection;
The high pressure neutral bushing outlet terminal O of a termination power transformer T of the normally closed contact J17-1 of described relay J 17
h; The high pressure neutral point voltage signal input part VOH of straight resistance measurement module U2 described in another termination of the normally closed contact J17-1 of described relay J 17; The normally opened contact J17-2 of described relay J 17 is unsettled;
The swing arm J5-1 of described relay J 5 meets the middle pressure A phase winding sleeve pipe outlet terminal A of power transformer T
m; The stationary contact J5-2 of described relay J 5 meets the middle pressure A phase current signal output terminal IAM of described straight resistance measurement module U2;
The stationary contact J5-3 of described relay J 5 is through the contact of described relay J 13 J13-1 ground connection;
The middle pressure A phase winding sleeve pipe outlet terminal A of a termination power transformer T of the normally closed contact J18-1 of described relay J 18
m; The middle pressure A phase voltage signal output terminal VAM of straight resistance measurement module U2 described in another termination of the normally closed contact J18-1 of described relay J 18; The normally opened contact J18-2 of described relay J 18 is unsettled;
The swing arm J6-1 of described relay J 6 meets the middle pressure B phase winding sleeve pipe outlet terminal B of power transformer T
m; The stationary contact J6-2 of described relay J 6 meets the middle pressure B phase current signal output terminal IBM of described straight resistance measurement module U2;
The stationary contact J6-3 of described relay J 6 is through the contact of described relay J 13 J13-1 ground connection;
The middle pressure B phase winding sleeve pipe outlet terminal B of a termination power transformer T of the normally closed contact J19-1 of described relay J 19
m; The middle pressure B phase voltage signal output terminal VBM of straight resistance measurement module U2 described in another termination of the normally closed contact J19-1 of described relay J 19; The normally opened contact J19-2 of described relay J 19 is unsettled;
The swing arm J7-1 of described relay J 7 meets the middle pressure C phase winding sleeve pipe outlet terminal C of power transformer T
m; The stationary contact J7-2 of described relay J 7 meets the middle pressure C phase current signal output terminal ICM of described straight resistance measurement module U2;
The stationary contact J7-3 of described relay J 7 is through the contact of described relay J 13 J13-1 ground connection;
The middle pressure C phase winding sleeve pipe outlet terminal C of a termination power transformer T of the normally closed contact J20-1 of described relay J 20
m; The middle pressure C phase voltage signal output terminal VCM of straight resistance measurement module U2 described in another termination of the normally closed contact J20-1 of described relay J 20; The normally opened contact J20-2 of described relay J 20 is unsettled;
The swing arm J8-1 of described relay J 8 meets the middle pressure neutral bushing outlet terminal O of power transformer T
m; The stationary contact J8-2 of described relay J 8 meets the middle pressure neutral point current signal input part IOM of described straight resistance measurement module U2;
The stationary contact J8-3 of described relay J 8 is through the contact of described relay J 13 J13-1 ground connection;
The middle pressure neutral bushing outlet terminal O of a termination power transformer T of the normally closed contact J21-1 of described relay J 21
m; The middle pressure neutral point voltage signal input part VOM of straight resistance measurement module U2 described in another termination of the normally closed contact J21-1 of described relay J 21; The normally opened contact J21-2 of described relay J 21 is unsettled;
The swing arm J9-1 of described relay J 9 meets the low pressure A phase winding sleeve pipe outlet terminal A of power transformer T
l; The stationary contact J9-2 of described relay J 9 meets the low pressure A phase current signal output terminal IAL of described straight resistance measurement module U2;
The stationary contact J9-3 of described relay J 9 is through the contact of described relay J 13 J13-1 ground connection;
The low pressure A phase winding sleeve pipe outlet terminal A of a termination power transformer T of the normally closed contact J22-1 of described relay J 22
l; The low pressure A phase voltage signal output terminal VAL of straight resistance measurement module U2 described in another termination of the normally closed contact J22-1 of described relay J 22; The normally opened contact J22-2 of described relay J 22 is unsettled;
The swing arm J10-1 of described relay J 10 meets the low pressure B phase winding sleeve pipe outlet terminal B of power transformer T
l; The stationary contact J10-2 of described relay J 10 meets the low pressure B phase current signal output terminal IBL of described straight resistance measurement module U2;
The stationary contact J10-3 of described relay J 10 is through the contact of described relay J 13 J13-1 ground connection;
The low pressure B phase winding sleeve pipe outlet terminal B of a termination power transformer T of the normally closed contact J23-1 of described relay J 23
l; The low pressure B phase voltage signal output terminal VBL of straight resistance measurement module U2 described in another termination of the normally closed contact J23-1 of described relay J 23; The normally opened contact J23-2 of described relay J 23 is unsettled;
The swing arm J11-1 of described relay J 11 meets the low pressure C phase winding sleeve pipe outlet terminal C of power transformer T
l; The stationary contact J11-2 of described relay J 11 meets the low pressure C phase current signal output terminal ICL of described straight resistance measurement module U2;
The stationary contact J11-3 of described relay J 11 is through the contact of described relay J 13 J13-1 ground connection;
The low pressure C phase winding sleeve pipe outlet terminal C of a termination power transformer T of the normally closed contact J24-1 of described relay J 24
l; The low pressure C phase voltage signal output terminal VCL of straight resistance measurement module U2 described in another termination of the normally closed contact J24-1 of described relay J 24; The normally opened contact J24-2 of described relay J 24 is unsettled;
The swing arm J12-1 of described relay J 12 meets the low pressure neutral bushing outlet terminal O of power transformer T
l; The stationary contact J12-2 of described relay J 12 meets the low pressure neutral point current signal input part IOL of described straight resistance measurement module U2;
The stationary contact J12-3 of described relay J 12 is through the contact of described relay J 13 J13-1 ground connection;
The low pressure neutral bushing outlet terminal O of a termination power transformer T of the normally closed contact J25-1 of described relay J 25
l; The low pressure neutral point voltage signal input part VOL of straight resistance measurement module U2 described in another termination of the normally closed contact J25-1 of described relay J 25; The normally opened contact J25-2 of described relay J 25 is unsettled;
The control signal input end of the coil of described relay J 1-J25 connects respectively the corresponding PORT COM of described master controller U1.
The model of described master controller U1 is for grinding auspicious T90; The model of described straight resistance measurement module U2 is dr-m; The model of described relay J 1-J25 is G7L-2A-P; Described power module U4-1 is pow-m; The described control module U4-2 that rises is upctl-m; It is described that to fall control module U4-3 be dnctl-m; Described time delay module U4-4 is tdl-m.
Measuring process of the present utility model is as follows:
Three-winding transformer measuring process is as follows: by stationary contact J1-2 ~ J4-2 closure of J1 ~ J4, switch to pressurized state, normally closed contact J14-1 ~ J17 of J14 ~ J17 switches to on-state; J5 ~ J12 switches to vacant state, and J18 ~ J25 switches to vacant state; Measure high pressure winding D.C. resistance by directly hindering measurement module, switch successively to most significant digit from lowest order by motor drive mechanism control module operation load ratio bridging switch, tap position of every switching, measures one time direct current resistance, completes the high pressure winding direct current resistance m easurem ent work under all taps position;
By stationary contact J5-2 ~ J8-2 closure of J5 ~ J8, switch to pressurized state, normally closed contact J18-1 ~ J21-1 of J18 ~ J21 switches to on-state; J1 ~ J4 and J9 ~ J12 switch to vacant state, and J14 ~ J17 and J22 ~ J25 switch to vacant state; Press winding D.C. resistance by directly hindering in measurement module measurement, switch successively to most significant digit from lowest order by motor drive mechanism control module operation load ratio bridging switch, tap position of every switching, measures one time direct current resistance, completes the middle pressure winding D.C. resistance surveying work under all taps position;
By stationary contact J9-2 ~ J12-2 closure of J9 ~ J12, switch to pressurized state, normally closed contact J22-1 ~ J25-1 of J22 ~ J25 switches to on-state; J1 ~ J9 switches to vacant state, and J17 ~ J21 switches to vacant state; Measure low pressure winding D.C. resistance by directly hindering measurement module.
If Fig. 3 is shown in the measurement to two-winding transformer T1, only need to disconnect the measuring relay J 5 ~ J8 of corresponding middle pressure winding and J18 ~ J21, all the other steps are identical with three-winding transformer measuring process.
Claims (3)
1. a Winding in Power Transformer direct resistance metering instrument, is characterized in that: comprise master controller U1, directly hinder measurement module U2, change-over switch module U3 and motor drive mechanism controller U4; Described motor drive mechanism controller U4 comprises power module U4-1, rises control module U4-2, falls control module U4-3 and time delay module U4-4;
The winding casing tube outlet terminal of power transformer T connects the corresponding port of described straight resistance measurement module U2 through meeting described change-over switch module U3; The two-way connection of corresponding PORT COM of the PORT COM of described straight resistance measurement module U2 and described master controller U1; Described power module U4-1, rise control module U4-2, corresponding PORT COM that the control signal input end that falls control module U4-3, time delay module U4-4 and change-over switch module U3 meets respectively described master controller U1; Described power module U4-1, rise control module U4-2, respective input that the control signal output terminal that falls control module U4-3 and time delay module U4-4 meets respectively the load ratio bridging switch motor drive mechanism FJKG of power transformer T.
2. a kind of Winding in Power Transformer direct resistance metering instrument according to claim 1, is characterized in that: described change-over switch module U3 comprises relay J 1-J25;
The swing arm J1-1 of described relay J 1 meets the high pressure A phase winding sleeve pipe outlet terminal A of power transformer T
h; The stationary contact J1-2 of described relay J 1 meets the high pressure A phase current signal output terminal IAH of described straight resistance measurement module U2;
The stationary contact J1-3 of described relay J 1 is through the contact of described relay J 13 J13-1 ground connection;
The high pressure A phase winding sleeve pipe outlet terminal A of a termination power transformer T of the normally closed contact J14-1 of described relay J 14
h; The high pressure A phase voltage signal output terminal VAH of straight resistance measurement module U2 described in another termination of the normally closed contact J14-1 of described relay J 14; The normally opened contact J14-2 of described relay J 14 is unsettled;
The swing arm J2-1 of described relay J 2 meets the high pressure B phase winding sleeve pipe outlet terminal B of power transformer T
h; The stationary contact J2-2 of described relay J 2 meets the high pressure B phase current signal output terminal IBH of described straight resistance measurement module U2;
The stationary contact J2-3 of described relay J 2 is through the contact of described relay J 13 J13-1 ground connection;
The high pressure B phase winding sleeve pipe outlet terminal B of a termination power transformer T of the normally closed contact J15-1 of described relay J 15
h; The high pressure B phase voltage signal output terminal VBH of straight resistance measurement module U2 described in another termination of the normally closed contact J15-1 of described relay J 15; The normally opened contact J15-2 of described relay J 15 is unsettled;
The swing arm J3-1 of described relay J 3 meets the high pressure C phase winding sleeve pipe outlet terminal C of power transformer T
h; The stationary contact J3-2 of described relay J 3 meets the high pressure C phase current signal output terminal ICH of described straight resistance measurement module U2;
The stationary contact J3-3 of described relay J 3 is through the contact of described relay J 13 J13-1 ground connection;
The high pressure C phase winding sleeve pipe outlet terminal C of a termination power transformer T of the normally closed contact J16-1 of described relay J 16
h; The high pressure C phase voltage signal output terminal VCH of straight resistance measurement module U2 described in another termination of the normally closed contact J16-1 of described relay J 16; The normally opened contact J16-2 of described relay J 16 is unsettled;
The swing arm J4-1 of described relay J 4 meets the high pressure neutral bushing outlet terminal O of power transformer T
h; The stationary contact J4-2 of described relay J 4 meets the high pressure neutral point current signal input part IOH of described straight resistance measurement module U2;
The stationary contact J4-3 of described relay J 4 is through the contact of described relay J 13 J13-1 ground connection;
The high pressure neutral bushing outlet terminal O of a termination power transformer T of the normally closed contact J17-1 of described relay J 17
h; The high pressure neutral point voltage signal input part VOH of straight resistance measurement module U2 described in another termination of the normally closed contact J17-1 of described relay J 17; The normally opened contact J17-2 of described relay J 17 is unsettled;
The swing arm J5-1 of described relay J 5 meets the middle pressure A phase winding sleeve pipe outlet terminal A of power transformer T
m; The stationary contact J5-2 of described relay J 5 meets the middle pressure A phase current signal output terminal IAM of described straight resistance measurement module U2;
The stationary contact J5-3 of described relay J 5 is through the contact of described relay J 13 J13-1 ground connection;
The middle pressure A phase winding sleeve pipe outlet terminal A of a termination power transformer T of the normally closed contact J18-1 of described relay J 18
m; The middle pressure A phase voltage signal output terminal VAM of straight resistance measurement module U2 described in another termination of the normally closed contact J18-1 of described relay J 18; The normally opened contact J18-2 of described relay J 18 is unsettled;
The swing arm J6-1 of described relay J 6 meets the middle pressure B phase winding sleeve pipe outlet terminal B of power transformer T
m; The stationary contact J6-2 of described relay J 6 meets the middle pressure B phase current signal output terminal IBM of described straight resistance measurement module U2;
The stationary contact J6-3 of described relay J 6 is through the contact of described relay J 13 J13-1 ground connection;
The middle pressure B phase winding sleeve pipe outlet terminal B of a termination power transformer T of the normally closed contact J19-1 of described relay J 19
m; The middle pressure B phase voltage signal output terminal VBM of straight resistance measurement module U2 described in another termination of the normally closed contact J19-1 of described relay J 19; The normally opened contact J19-2 of described relay J 19 is unsettled;
The swing arm J7-1 of described relay J 7 meets the middle pressure C phase winding sleeve pipe outlet terminal C of power transformer T
m; The stationary contact J7-2 of described relay J 7 meets the middle pressure C phase current signal output terminal ICM of described straight resistance measurement module U2;
The stationary contact J7-3 of described relay J 7 is through the contact of described relay J 13 J13-1 ground connection;
The middle pressure C phase winding sleeve pipe outlet terminal C of a termination power transformer T of the normally closed contact J20-1 of described relay J 20
m; The middle pressure C phase voltage signal output terminal VCM of straight resistance measurement module U2 described in another termination of the normally closed contact J20-1 of described relay J 20; The normally opened contact J20-2 of described relay J 20 is unsettled;
The swing arm J8-1 of described relay J 8 meets the middle pressure neutral bushing outlet terminal O of power transformer T
m; The stationary contact J8-2 of described relay J 8 meets the middle pressure neutral point current signal input part IOM of described straight resistance measurement module U2;
The stationary contact J8-3 of described relay J 8 is through the contact of described relay J 13 J13-1 ground connection;
The middle pressure neutral bushing outlet terminal O of a termination power transformer T of the normally closed contact J21-1 of described relay J 21
m; The middle pressure neutral point voltage signal input part VOM of straight resistance measurement module U2 described in another termination of the normally closed contact J21-1 of described relay J 21; The normally opened contact J21-2 of described relay J 21 is unsettled;
The swing arm J9-1 of described relay J 9 meets the low pressure A phase winding sleeve pipe outlet terminal A of power transformer T
l; The stationary contact J9-2 of described relay J 9 meets the low pressure A phase current signal output terminal IAL of described straight resistance measurement module U2;
The stationary contact J9-3 of described relay J 9 is through the contact of described relay J 13 J13-1 ground connection;
The low pressure A phase winding sleeve pipe outlet terminal A of a termination power transformer T of the normally closed contact J22-1 of described relay J 22
l; The low pressure A phase voltage signal output terminal VAL of straight resistance measurement module U2 described in another termination of the normally closed contact J22-1 of described relay J 22; The normally opened contact J22-2 of described relay J 22 is unsettled;
The swing arm J10-1 of described relay J 10 meets the low pressure B phase winding sleeve pipe outlet terminal B of power transformer T
l; The stationary contact J10-2 of described relay J 10 meets the low pressure B phase current signal output terminal IBL of described straight resistance measurement module U2;
The stationary contact J10-3 of described relay J 10 is through the contact of described relay J 13 J13-1 ground connection;
The low pressure B phase winding sleeve pipe outlet terminal B of a termination power transformer T of the normally closed contact J23-1 of described relay J 23
l; The low pressure B phase voltage signal output terminal VBL of straight resistance measurement module U2 described in another termination of the normally closed contact J23-1 of described relay J 23; The normally opened contact J23-2 of described relay J 23 is unsettled;
The swing arm J11-1 of described relay J 11 meets the low pressure C phase winding sleeve pipe outlet terminal C of power transformer T
l; The stationary contact J11-2 of described relay J 11 meets the low pressure C phase current signal output terminal ICL of described straight resistance measurement module U2;
The stationary contact J11-3 of described relay J 11 is through the contact of described relay J 13 J13-1 ground connection;
The low pressure C phase winding sleeve pipe outlet terminal C of a termination power transformer T of the normally closed contact J24-1 of described relay J 24
l; The low pressure C phase voltage signal output terminal VCL of straight resistance measurement module U2 described in another termination of the normally closed contact J24-1 of described relay J 24; The normally opened contact J24-2 of described relay J 24 is unsettled;
The swing arm J12-1 of described relay J 12 meets the low pressure neutral bushing outlet terminal O of power transformer T
l; The stationary contact J12-2 of described relay J 12 meets the low pressure neutral point current signal input part IOL of described straight resistance measurement module U2;
The stationary contact J12-3 of described relay J 12 is through the contact of described relay J 13 J13-1 ground connection;
The low pressure neutral bushing outlet terminal O of a termination power transformer T of the normally closed contact J25-1 of described relay J 25
l; The low pressure neutral point voltage signal input part VOL of straight resistance measurement module U2 described in another termination of the normally closed contact J25-1 of described relay J 25; The normally opened contact J25-2 of described relay J 25 is unsettled;
The control signal input end of the coil of described relay J 1-J25 connects respectively the corresponding PORT COM of described master controller U1.
3. a kind of Winding in Power Transformer direct resistance metering instrument according to claim 2, is characterized in that: the model of described master controller U1 is for grinding auspicious T90; The model of described straight resistance measurement module U2 is dr-m; The model of described relay J 1-J25 is G7L-2A-P; Described power module U4-1 is pow-m; The described control module U4-2 that rises is upctl-m; It is described that to fall control module U4-3 be dnctl-m; Described time delay module U4-4 is tdl-m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420086156.1U CN203759121U (en) | 2014-02-27 | 2014-02-27 | Electric power voltage transformer winding direct current resistance tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420086156.1U CN203759121U (en) | 2014-02-27 | 2014-02-27 | Electric power voltage transformer winding direct current resistance tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203759121U true CN203759121U (en) | 2014-08-06 |
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ID=51254377
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420086156.1U Expired - Fee Related CN203759121U (en) | 2014-02-27 | 2014-02-27 | Electric power voltage transformer winding direct current resistance tester |
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| Country | Link |
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| CN (1) | CN203759121U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103884915A (en) * | 2014-02-27 | 2014-06-25 | 国家电网公司 | Device and method for automatically measuring direct-current resistance of windings of power transformers |
| CN104849556A (en) * | 2015-04-23 | 2015-08-19 | 国家电网公司 | Direct current resistance test system for transformer winding |
-
2014
- 2014-02-27 CN CN201420086156.1U patent/CN203759121U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103884915A (en) * | 2014-02-27 | 2014-06-25 | 国家电网公司 | Device and method for automatically measuring direct-current resistance of windings of power transformers |
| CN104849556A (en) * | 2015-04-23 | 2015-08-19 | 国家电网公司 | Direct current resistance test system for transformer winding |
| CN104849556B (en) * | 2015-04-23 | 2018-02-23 | 国家电网公司 | A kind of Transformer Winding D.C. resistance test system |
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