CN1037037A - High pressure measuring and supervising switch cabinet - Google Patents

High pressure measuring and supervising switch cabinet Download PDF

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Publication number
CN1037037A
CN1037037A CN 88102324 CN88102324A CN1037037A CN 1037037 A CN1037037 A CN 1037037A CN 88102324 CN88102324 CN 88102324 CN 88102324 A CN88102324 A CN 88102324A CN 1037037 A CN1037037 A CN 1037037A
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circuit
voltage
phase
current
polarity
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汤赣生
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Abstract

The error that influences high pressure measurement is two partly: 1. the body error of high pressure measurement watt-hour meter.2. change voltage, electric current, phase sequence, polarity, the PT of watt-hour meter in using, the caused error of the secondary connection of CT.Therefore the high-voltage metering cubicle of original technology when the second part source of error occurring, does not provide fault category and fault-time because of there not being monitor function.The present invention is according to the secondary voltage of PT " V " the type mode of connection and PT, CT, and electric current has been formed all multi-functional supervision and timekeeping system, when the second part failure cause occurring, can distinguish fault category, and the record trouble time provides parameter for remedying the clearing electric degree.

Description

High pressure measuring and supervising switch cabinet
The present invention relates to the supervision and the timing aspect of the electric-power metering of voltage transformer (VT) in the high pressure measuring and supervising switch cabinet " V " the type mode of connection.
The watt-hour meter that is used for high-voltage power metering except watt-hour meter body error, also is subjected to voltage, electric current, phase sequence, voltage transformer (VT), the influence of the secondary connection of current transformer and polarity aspect.High pressure measurement watt-hour meter in the use, as be subjected to fault, artificial voltage, electric current, phase sequence, voltage transformer (VT), the correct metering that influences watt-hour meter is in various degree all incited somebody to action in the secondary connection of current transformer and the change of polarity.State Bureau of Standardization correctly measures in order to make watt-hour meter, adopting by reference No. 521 publication of International Electrotechnical Commission (IEC) " 0.5,1 and 2 grade of alternating-current watt-hour meter " and No. 145 publication " weary you-hour (idle) table ", formulate and issued the GB3924-83 of People's Republic of China (PRC) standard.The GB3924-83 standard is to the mode of connection of watt-hour meter, and the standard phase sequence has been done strict regulation.Yet the high pressure measurement switch cubicle of prior art, single ground is locked in watt-hour meter in the metering cabinet that can seal just, its obvious weak point is, for the watt-hour meter in using, when that break down or artificial change voltage, electric current, phase sequence and voltage transformer (VT), the secondary connection of current transformer, polarity, when having a strong impact on the correct metering of watt-hour meter, supervision clocking capability all unnecessary and science, cause when settling accounts and remedying electric degree, fault category and time parameter can not be provided.Purpose of the present invention is intended to not influence the switching characteristic of prior art, outside cabinet body structure and the relevant technologies parameter, to the watt-hour meter in using, when that break down or artificial change voltage, electric current, phase sequence and voltage transformer (VT), the secondary connection of current transformer, polarity chron, obtain the voltage decompression by logic blocking and select phase, the locking of electric current defluidization, the polarity of electric current, voltage, the supervision clocking capability of phase-locked and positive negative-phase sequence, for clearing and remedy electric degree provide fault category and fault-time parameter.
The present invention in document Investigation retrieval, read three proclamations of Chinese invention patent communique: (one) 85103429 electronic type electric energy metering apparatus; (2) 85100140 novel high-pressure fuse apparatus; (3) 85107511 non-contact voltage phase measuring means and application thereof, and the 86204485 anti-electricity-theft low-voltage distribution panels of issuing in the Chinese utility model patent communique; 85203338 controller for preventing illegal use of electricity all do not relate to the present invention's technical field.
The present invention is applicable in the 10KV high pressure measurement switch cubicle, metering supervision and timing aspect on voltage transformer (VT) " V " the type mode of connection.
Following accompanying drawing is one embodiment of the invention.
This high pressure measuring and supervising switch cabinet inserts in the electric system of 10KV, and the voltage transformer (VT) that the high pressure measuring and supervising switch cabinet body is installed is connected into " V " type mode of connection, and by its secondary voltage, and the secondary current of current transformer, form L 1Voltage transformer secondary AB voltage and polarity watchdog circuit; L 2Voltage transformer secondary BC voltage and polarity watchdog circuit; L 3Voltage transformer secondary AC voltage and polarity watchdog circuit; L 4Voltage transformer secondary BO voltage phase-locked circuit; L 5The self check of electrogoniometer, automatic control and test watchdog circuit; L 6The phase sequence watchdog circuit; L 7Current loading, polarity and Current Transformer Secondary electric current AC locking watchdog circuit mutually; L 8The current loading locking is selected timing circuit mutually with the decompression logic; L 9Voltage mistake phase sequence and secondary voltage incorrect polarity timing circuit; L 10Horizontal poor locking of electric current and current polarity wrong timing circuit; L 11The voltage working signal circuit; L 12Secondary voltage mistake polarity warning circuit.
L 1Voltage transformer secondary AB voltage and polarity watchdog circuit.This circuit is by relay J 1, J 4, rectifier bridge LQ 1And resistance R 1, R 2, R 9, electrochemical capacitor C 1, diode D 1, D 2Form, insert in the AB voltage circuit that voltage transformer secondary exchanges, through LQ 1The rectifier bridge rectification is a DC voltage.Just often, J 1Relay is in running order.When A of voltage transformer (VT) mutually or B phase fuse, and the secondary A of voltage transformer (VT) is mutually or B phase fuse, with A mutually or B phase voltage secondary circuit when breaking, J 1Relay electric-loss, its normally opened contact J 1-3 disconnect normally closed contact J 1-1, J 1-2, J 1-4 return, conducting L 8The current loading locking is selected timing circuit mutually with the decompression logic, and the logic phase-selecting function of this circuit of process, distinguishes the fault phase, and starts the timer of fault phase, thereby reach the supervision purpose of AB voltage.
J 4Relay is the polarity of supervision voltage transformer (VT), same J 1Relay is attempted by in the same circuit.Just often, promptly voltage transformer (VT) is "-" polarity chron, though relay J 4Be attempted by the AB voltage Mi branch school Ji Qian Xun after rectification 9Effect under, be not in the work starting state.Yet, when voltage transformer (VT) generation incorrect polarity, "+" polarity chron promptly takes place, 1.73 times line voltage will appear in the voltage electrical secondary system, make watt-hour meter produce bigger error, and threaten the safety of voltage electrical secondary system, at this moment, relay J 4Action immediately, its normally opened contact J 4-1, J 4-2 closures, conducting L 9Circuit and L 12Circuit starts timer S5, sends alarm signal, reaches the supervision timing purpose of AB voltage and voltage transformer (VT) incorrect polarity.Resistance R 1, R 2In secondary voltage AB ac circuit with rectifier bridge LQ 1Serial connection plays the step-down effect, especially as this circuit A phase or B phase decompression and circuit L 2, L 3Interchange serial connection naturally partly, during the formation loop, also play hypotensive effect.Diode D 1, D 2Respectively with relay J 1, J 4Oppositely and connect, play protective relay.
L 2Voltage transformer secondary BC voltage and polarity watchdog circuit.This circuit is by relay J 2, J 5, rectifier bridge LQ 2And resistance R 3, R 4, R 10, electrochemical capacitor C 2, diode D 3, D 4Form, insert in the BC voltage circuit that voltage transformer secondary exchanges, through LQ 2The rectifier bridge rectification is a DC voltage.Just often, J 2Relay is in running order.When B of voltage transformer (VT) mutually or C phase fuse, and the quadratic B of voltage transformer (VT) is mutually or C phase fuse, with B mutually or C phase voltage secondary circuit when breaking, J 2Relay electric-loss, its normally opened contact J 2-3 disconnect normally closed contact J 2-1, J 2-2, J 2-4 return, conducting L 8The current loading locking is selected timing circuit mutually with the decompression logic, and the logic phase-selecting function of this circuit of process, distinguishes the fault phase, and starts the timer of fault phase, thereby reach the supervision purpose of BC voltage.
J 5Relay is the polarity of supervision voltage transformer (VT), same J 2Relay is attempted by in the same circuit.Just often, promptly voltage transformer (VT) is "-" polarity chron, though relay J 5Be attempted by in the BC voltage circuit after rectification, but in resistance R 10Effect under, be not in the work starting state.Yet, when voltage transformer (VT) generation incorrect polarity, "+" polarity chron promptly takes place, 1.73 times line voltage will appear in the voltage electrical secondary system, make watt-hour meter produce bigger error, and threaten the safety of voltage electrical secondary system, at this moment, relay J 5Action immediately, its normally opened contact J 5-1, J 5-2 closures, conducting L 9Circuit and L 12Circuit starts timer S 5, send alarm signal, reach the supervision timing purpose of BC voltage and voltage transformer (VT) incorrect polarity.Resistance R 3, R 4In secondary voltage BC ac circuit with rectifier bridge LQ 2Serial connection plays the step-down effect, especially as this circuit B phase or C phase decompression and circuit L 1, L 3Interchange serial connection naturally partly, during the formation loop, also play hypotensive effect.Diode D 3, D 4Respectively with relay J 2, J 5Oppositely and connect, play protective relay.
L 3Voltage transformer secondary AC voltage and polarity watchdog circuit.This circuit is by relay J 3J 6, rectifier bridge LQ 3And resistance R 5, R 6, R 11, electrochemical capacitor C 3, diode D 5, D 6Form, insert in the AC voltage circuit that voltage transformer secondary exchanges, through LQ 3The rectifier bridge rectification is a DC voltage.Just often, J 3Relay is in running order.When A of voltage transformer (VT) mutually or C phase fuse, and the secondary A of voltage transformer (VT) is mutually or C phase fuse, with A mutually or C phase voltage secondary circuit when breaking, J 3Relay electric-loss, its normally opened contact J 3-3 disconnect normally closed contact J 3-1, J 3-2, J 3-4 return, conducting L 8The current loading locking is selected timing circuit mutually with the decompression logic, and the logic phase-selecting function of this circuit of process, distinguishes the fault phase, and starts the timer of fault phase, thereby reach the supervision purpose of AC voltage.
J 6Relay is the polarity of supervision voltage transformer (VT), same J 3Relay is attempted by in the same circuit.Just often, promptly voltage transformer (VT) is "-" polarity chron, though relay J 6Be attempted by in the AC voltage circuit after rectification, but in resistance R 11Effect under, be not in the work starting state.Yet, when voltage transformer (VT) generation incorrect polarity, "+" polarity chron promptly takes place, 1.73 times line voltage will appear in the voltage electrical secondary system, make watt-hour meter produce bigger error, and threaten the safety of voltage electrical secondary system, at this moment, relay J 6Action immediately, its normally opened contact J 6-1, J 6-2 closures, conducting L 9Circuit and L 12Circuit starts timer S 5, send alarm signal, reach the supervision timing purpose of AC voltage and voltage transformer (VT) incorrect polarity.Resistance R 5, R 6In secondary voltage AC ac circuit with rectifier bridge LQ 3Serial connection plays the step-down effect, especially as this circuit A phase or C phase decompression and circuit L 1, L 2Interchange serial connection naturally partly, during the formation loop, also play hypotensive effect.Diode D 5, D 6Respectively with relay J 3, J 6Oppositely and connect, play protective relay.
L 4Voltage transformer secondary BO voltage phase-locked circuit.This circuit is by relay J 7, rectifier bridge LQ 4And resistance R 7, R 8, electrochemical capacitor C 4, gauge tap K 1, diode D 7Form.According to GB3924-83 watt-hour meter phase sequence wiring standard, in the present invention-high pressure measuring and supervising switch cabinet, the B phase secondary voltage-to-ground of voltage transformer (VT) " V " the type mode of connection is zero characteristics, this circuit is inserted in the BO voltage circuit of voltage transformer secondary interchange.Just often, because of B no-voltage relatively, relay J 7No-voltage passes through, and is in off position.When non-ABC standard positive phase sequence appears in voltage transformer secondary voltage, promptly there is the voltage of 100V to pass through in the BO secondary circuit, at this moment, relay J 7Start its normally closed contact J 7-1 returns, locking L 8The current loading locking is selected timing circuit mutually with the decompression logic, its normally opened contact J 7-2 closures start timer S 5, the indication fault classification, is sent fault-signal, thereby is reached the phase-locked effect of ABC standard phase sequence at the record trouble time.But when occurring the CBA negative-phase sequence in the secondary voltage circuit, this circuit will lose the supervision effect, and by phase sequence watchdog circuit L 6Differentiate.
K 1Gauge tap is the gauge tap of this circuit.Before determining ABC standard phase sequence, should throw to open position, when definite ABC standard phase sequence, be about to drop into make-position, to lock ABC standard phase sequence.
Resistance R 7, R 8In secondary voltage BO ac circuit with rectifier bridge LQ 4Serial connection plays the step-down effect, when the B of this circuit phase decompression, with L 1, L 2When the interchange of circuit partly is connected in series naturally, also play hypotensive effect.Diode D 7Anti-phase and connect with relay, play protective relay.
L 5The self check of electrogoniometer, automatic control and test watchdog circuit.This circuit is tested knob AN, gauge tap K by rotary electrogoniometer M 2And relay J 8, J 9Normally closed contact J 8-1, J 8-2, J 8-3, J 9-1, J 9-2, J 9-3 compositions insert in the loop of voltage transformer secondary voltage ABC standard phase sequence.Because rotary electrogoniometer M can only moment test with voltage detect phase sequence, therefore has been connected in series respectively in this circuit and has returned test button AN and J automatically 8, J 9The normally closed contact J of relay 8-1, J 8-2, J 8-3, J 9-1, J 9-2, J 9-3, to prevent the long-term charging operation of electrogoniometer M.Just often, electrogoniometer M is not with voltage.Artificially detect phase sequence as need, can press and return test knob AN automatically, negative-phase sequence is just being represented in electrogoniometer M rotation.(annotate: K 2Gauge tap is in the close position.) because the change phase sequence must be carried out, and watt-hour meter serious error in dipping will occur under the situation of wrong phase sequence simultaneously, therefore, in the voltage secondary circuit, after each decompression, all need detect phase sequence again under situation about having a power failure.This circuit can detect under the situation of sending a telegram here again after the decompression voluntarily.In circuit, because of J after the decompression 8, J 9Relay electric-loss, its normally closed contact J 8-1, J 8-2, J 8-3, J 9-1, J 9-2, J 9-3 all return closure, the structure circuit passband.When in the voltage secondary circuit voltage being arranged, electrogoniometer M can detect voluntarily, is just indicating negative-phase sequence.In detecting voluntarily, if positive phase sequence, J 9The relay startup that is triggered, its normally closed contact J 9-1, J 9-2, J 9-3 disconnect, and electrogoniometer M dead electricity reaches self check, the purpose of automatic control.Otherwise, if negative-phase sequence, then J 8The relay startup that is triggered, its normally closed contact J 8-1, J 8-2, J 8-3 disconnect, and electrogoniometer M dead electricity also reaches self check, the purpose of automatic control.
L 6The phase sequence watchdog circuit.This circuit is mainly by transformer B, rectifier bridge QL 5, electrogoniometer M, relay J 8, J 9, controllable silicon D 12, D 13, double base diode D 14, D 15, diode D 8, D 9, D 10, D 11, resistance R 12, R 13, R 14, R 15, R 16, R 17, R 18, R 19, electrochemical capacitor C 5, C 6, C 7With the metal flexible conductor F on the electrogoniometer rotation aluminium dish, and the fixed contact M in the electrogoniometer 1, M 2Form.Metal flexible conductor F on the so-called rotating circular disk is meant on the electrogoniometer rotating circular disk, the soft foil metal of a bonding positively charged, when rotating circular disk when the positive phase sequence direction is rotated, the metal flexible conductor F of positively charged is with fixed contact M 1Connect; When rotating circular disk when the negative-phase sequence direction is rotated, the metal flexible conductor F on the disk is with fixed contact M 2Connect.The working condition of this circuit is: the former edge joint of transformer B is gone in the AC phase loop of voltage transformer secondary voltage, pays the limit through rectifier bridge LQ 5After the rectification, the DC voltage of output 12V, when the secondary voltage system was positive phase sequence, the rotating circular disk among the electrogoniometer M was promptly to the rotation of positive phase sequence direction, metal flexible conductor F on the disk and fixed contact M 1Connect, the 12V positive supply is through resistance R 16To electrochemical capacitor C 6Charging.About 5-10 of duration of charging second.5-10 is after second, electrochemical capacitor C 6To double base diode D 14Discharge, the double base diode conducting that is triggered, the output pulse current is through adjustable resistance R 12Trigger controllable silicon D 12, controllable silicon D 12Conducting, relay J 9Start its normally closed contact J 9-4 disconnect locking J 8Relay, its normally opened contact J 9-5 closures, forward voltage working signal circuit L 11, instructed voltage is working properly.Because L 4Voltage transformer secondary BO voltage phase-locked circuit, the locking of quadratic B phase-to-ground voltage, therefore, the positive phase sequence in this circuit can only be the ABC positive phase sequence, and can not be BCA, or CAB.When the secondary voltage system was negative-phase sequence, the rotating circular disk among " comprising that phase sequence is anti-phase " electrogoniometer M was promptly to the rotation of negative-phase sequence direction, metal flexible conductor F on the disk and fixed contact M 2Connect, the 12V positive supply is through resistance R 17To electrochemical capacitor C 7Charging.About 5-10 of duration of charging second.5-10 is after second, electrochemical capacitor C 7To double base diode D 15Discharge, the double base diode conducting that is triggered, the output pulse current is through adjustable resistance R 13Trigger controllable silicon D 13, controllable silicon D 13Conducting, relay J 8Start its normally closed contact J 8-4 return disconnection, locking L 8The current loading locking is selected timing circuit mutually with the decompression logic; Normally closed contact J 8-6 disconnect locking J 9Relay; Normally closed contact J 8-7 disconnect L 11The voltage working signal circuit, light emitting diode D 26Extinguish its normally opened contact J 8-5 closures start timer S 5, record negative-phase sequence fault-time, and send the negative-phase sequence fault-signal.This circuit is because therefore the monitor function with positive and negative phase sequence has remedied L 4The deficiency of voltage transformer secondary BO phase lock circuitry.
L 7Current loading, polarity and Current Transformer Secondary electric current AC locking watchdog circuit mutually.This circuit is mainly by the A phase current mutual inductor and (the A phase current table CB of two rectification type reometers on the C phase current mutual inductor secondary current that are installed in the high pressure measuring and supervising switch cabinet of the present invention 1, C phase current table CB 2), A phase mercury cabin G 1, G 2, C phase mercury cabin G 3, G 4, the little conductor N of A phase metal 1, N 2, the little conductor N of C phase metal 3, N 4And relay J 10, J 11, J 12, J 13, diode D 16, D 17, D 18, D 19Form.In this circuit, the little conductor of so-called mercury cabin and metal is meant at reometer CB 1, CB 2The little weight position of pointer afterbody on, each bonding two little conductor of very thin metal, little conductor insert in the hole, mercury cabin along with the swing of pointer, form on-off circuit.Bonding little conductor and ammeter pointer form certain fixed angle, and separate with insulant and pointer, when pointer with the load current direction, during the size swing, also drive the little conductor of very thin metal in the mercury cabin, take out corresponding current value and direction value, when current value that reaches needs and direction value, little conductor and mercury cabin form closed circuit and starting relay, reach the supervision purpose of this circuit.In this circuit, when A mutually or C phase load electric current when reaching 0.5A, little conductor N 1, N 3With mercury cabin G 1, G 3Form the loop, respectively starting relay J 10And J 12, its normally opened contact J 10-1, J 12-1 closure is L 8The current loading locking is selected mutually with the decompression logic, and timing circuit plays load supervision effect.The load supervision has important boundary effect in the present invention.Because the having of the watt-hour meter of electric-power metering carried a decompression and with the no-load decompression different metering meanings arranged, there is the decompression of carrying that watt-hour meter is counted less or disregards electric degree, no-load decompression then watt-hour meter will not measured electric degree, thereby also just lose the meaning of decompression supervision timing.The supervision of AC phase current in this circuit is to play the supervision effect under the situation of carrying having.
In high-voltage electric power system, because the ABC threephase load is in state in a basic balance, therefore, when any phase defluidization of AC two-phase, can by fault mutually the current instruction value different with normal phase distinguish fault phase and normal phase, that is to say, can utilize the transverse differential current of AC phase to examine and determine the size and Orientation of distinguishing the AC phase current, if in the AC two-phase current, any phase defluidization is wherein by little conductor N 1, N 3Trigger the J that starts 10, J 12Relay must have one to return because of dead electricity.Here supposition is A phase defluidization, then CB 1Reometer is back to 0, little conductor N 1With mercury cabin G 1Break away from J 10Relay electric-loss, its normally closed contact J 10-3 return closure, horizontal poor locking of conducting electric current and current polarity wrong timing circuit L 10, start S 6Timer, the record A phase defluidization time, send A phase fault signal, reach the supervision purpose of A phase defluidization; If the C phase, then C phase current table is back to 0, little conductor N 3With mercury cabin G 3Break away from J 12Relay electric-loss, its normally closed contact J 12-4 return, conducting L 10Horizontal poor locking of electric current and current polarity wrong timing circuit start S 6Timer, the record C phase defluidization time, send C phase current fault-signal, reach the supervision purpose of C phase defluidization.When AC two-phase current table does not all have indication, then represent non-loaded, ammeter pointer indication " 0 " position, little conductor N 1, N 3, N 2, N 4All with mercury cabin G 1, G 3, G 2, G 4Break away from relay J 10, J 12, J 11, J 13Equal dead electricity, its normally opened contact J 10-1, J 10-2, J 10-4; J 12-1, J 12-2, J 12-3; J 11-1; J 13-1 all disconnects exclusive circuit L 8, L 9, L 10But when the AC two-phase current all broke down, AC two-phase defluidization fault and AC two-phase are non-loaded to lose the supervision effect to this circuit because of not distinguishing.
The current coil of high pressure measurement watt-hour meter is the secondary current of current transformer owing to flow through, therefore, when the primary current direction opposite, perhaps change the polarity of secondary current, all can influence the error of watt-hour meter, serious can make also that watt-hour meter is counter to be walked, make watt metering generation serious mistake.For the polarity of secondary current and the opposite direction supervision of primary current, be in this circuit at CB 1, CB 2The right side of ammeter pointer afterbody promptly on the Fu direction position, respectively installs a cover mercury cabin G additional 2, G 4Because CB 1, CB 2Reometer is the directivity reometer, therefore works as CB 1CB 2The pointer of reometer during indication numerical value, can show that promptly this primary current direction is opposite, or secondary polarity is negative value to negative direction swing.Suppose that A phase primary current direction is opposite, or A phase secondary current polarity makes a mistake, this moment N 2Little conductor and G 2The mercury cabin constitutes the loop, starts J 11Relay, its normally opened contact J 11-1 closure, horizontal poor locking of conducting electric current and current polarity wrong timing circuit L 10, start S 6Timer, sends fault-signal at the record A phase incorrect polarity time; If C phase primary current direction is opposite, or C phase secondary current polarity makes a mistake, then N 4Little conductor and G 4The mercury cabin constitutes path, starts J 13Relay, its normally opened contact J 13-1 closure, horizontal poor locking of conducting electric current and current polarity wrong timing circuit L 10Start S 6Timer, sends fault-signal at the record C phase incorrect polarity time.When AC two-phase primary current direction is opposite, or AC two-phase secondary current polarity is when making a mistake, little conductor N 2, N 4With mercury cabin G 2, G 4Constitute path, start J respectively 11, J 13Relay, its normally opened contact J 11-1, J 13-1 closure, horizontal poor locking of conducting electric current and current polarity wrong timing circuit L 10, start S 6Timer, sends fault-signal, thereby reaches the supervision purpose of AC two-phase incorrect polarity at the record AC two-phase incorrect polarity time.
Diode D 16, D 17, D 18, D 19Be in relay J 10, J 11, J 12, J 13Apply voltage, when producing back-emf, play the effect of protective relay.
L 8The current loading locking is selected timing circuit mutually with the decompression logic.This circuit is by normally opened contact J 1-3, J 2-3, J 3-3, normally closed contact J 1-1, J 1-2, J 1-4, J 2-1, J 2-2, J 2-4, J 3-1, J 3-2, J 3-4, J 10-1, J 12-1, J 7-1, J 8-4, timer S 1, S 2, S 3, S 4, light emitting diode D 20, D 21, D 22, D 23, form, by relay normally open, the characteristic of normally closed contact is formed the current loading locking and is selected mutually with the decompression logic.So-called current loading is latched in L of the present invention 7Current loading has been done detailed narration in the explanation of polarity and Current Transformer Secondary electric current AC locking watchdog circuit mutually.It should be stressed that in this circuit the current loading locking is distinguished the effect of current failure and voltage failure classification in addition except the meaning that the load supervision is arranged.In this circuit, when current failure occurring, will be by normally opened contact J 10-1, J 12-1 disconnects, and locking decompression logic is selected phase, that is to say, the decompression logic is selected the timer (S of phase 1, S 2, S 3, S 4) can record current fault-time.Otherwise, when voltage failure occurring, because timer S 6Record current fault-time, thereby just do not had the voltage failure time yet, therefore, so-called current loading locking not only has the effect of load locking, also has the effect of distinguishing fault category.In addition, because the wrong phase sequence that occurs in watt metering has different error coefficients and fault category with the watt-hour meter voltage decompression, therefore, in this circuit, also must distinguish wrong phase sequence mutually with the choosing of decompression logic and come.J in the circuit 7-1, J 8-4 normally closed contacts are L 4J in the circuit 7Relay and L 6The J of circuit 8Relay, when voltage transformer secondary electrical voltage system phase sequence is ABC standard phase sequence, J 7, J 8Relay all can not start, its normally closed contact J 7-1, J 8-4 closures.But, when voltage transformer secondary electrical voltage system phase sequence is non-standard ABC phase sequence, J 7Relay, or J 8Relay all can move, its normally closed contact J 7-1 or J 8-4 return disconnection, and locking decompression logic is selected phase, timer S 1, S 2S 3, S 4All can not start timing, thereby reach the logic blocking effect of wrong phase sequence of difference and watt-hour meter voltage decompression.In a word, the decompression logic in this circuit is selected the S of phase 1, S 2, S 3, S 4Timer only having under the correct situation of load and phase sequence, when the watt-hour meter voltage decompression, just can play the function that the decompression logic is selected phase.Below with regard to the B phase decompression in the circuit, A phase decompression, the logic choosing of C phase decompression and ABC three-phase pressure loss or any decompression of ABC two-phase is illustrated mutually.
B phase decompression.Circuit L 1J 1Relay and circuit L 2J 2Relay, because of bearing AB, BC voltage respectively, this moment is owing to B phase decompression, relay J 1, J 2Equal dead electricity, its normally closed contact J 1-1, J 2-1 returns.J 3-3 normally opened contacts are because of L 3The J of circuit 3Relay is bearing AC voltage, and this moment is still in running order, J 3-3 normally opened contact closures, S 1The timer circuit conducting, record B phase decompression time, light emitting diode D 20Bright, send fault-signal.Although the J in the circuit 1-2, J 1-4 and J 2-2, J 2-4 normally closed contacts all return close logical, but because of J 3-1, J 3-2, J 3-4 normally closed contacts are in open position, so S 2S 3, S 4Timer all can not start timing, thereby the logic that has played B phase decompression is selected the phase purpose.
A phase decompression.Circuit L 1J 1Relay and circuit L 3J 3Relay, because of bearing AB, AC voltage respectively, this moment is owing to A phase decompression, relay J 1, J 3Equal dead electricity, its normally closed contact J 1-2, J 3-1, returns.J 2-3 normally opened contacts are because of L 2The J of circuit 2Relay is bearing BC voltage, and this moment is still in running order, J 2-3 normally opened contact closures, S 2The timer circuit conducting, record A phase decompression time, light emitting diode D 21Bright, send fault-signal.Although the J in the circuit 1-1, J 1-4 and J 3-2, J 3-4 normally closed contacts all return close logical, but because of J 2-1, J 2-2, J 2-4 normally closed contacts are in open position, so S 1, S 3, S 4Timer all can not start timing, thereby the logic that has played A phase decompression is selected the phase purpose.
C phase decompression.Circuit L 2J 2Relay and L 3The J of circuit 3Relay, because of bearing BC, AC voltage respectively, this moment is owing to C phase decompression, relay J 2, J 3Equal dead electricity, its normally closed contact J 2-2, J 3-2 return.J 1-3 normally opened contacts are because of L 1The J of circuit 1Relay is bearing AB voltage, and this moment is still in running order, J 1-3 normally opened contact closures, conducting S 3Timer, record C phase decompression time, light emitting diode D 22Bright, send fault-signal.Although the J in the circuit 2-1, J 2-4 and J 3-1, J 3-4 normally closed contacts all return close logical, but because of J 1-1, J 1-2, J 1-4 normally closed contacts are in open position, so S 1, S 2, S 4Timer all can not start timing, thereby has played the purpose that C phase decompression logic is selected phase.
ABC three-phase pressure loss, or any two-phase decompression of ABC.Because the watt-hour meter in the metering when any two-phase decompression of ABC and ABC three-phase pressure loss, all stops to measure electric energy, therefore, there is no need a two-phase decompression and three-phase pressure loss and make a distinction in this circuit, but they are combined in the timing unit.In circuit, suppose the ABC three-phase pressure loss, or any two-phase decompression of ABC, L at this moment 1The J of circuit 1Relay, L 2The J of circuit 2Relay, L 3The J of circuit 3Equal three characteristics of the middle term decompression of relay or two-phase decompression and dead electricity, its normally closed contact J 1-4, J 2-4, J 3-4 return closure, start S 4Timer, record three-phase pressure loss or two-phase decompression time, D 23Light emitting diode is bright, sends fault-signal.Although the J in the circuit 1-1, J 1-2, J 2-1, J 2-2, J 3-1, J 3-2 normally closed contacts all return close logical, but because of J 1-3, J 2-3, J 3-3 normally opened contacts are in open position, so S 1, S 2S 3Timer all can not start timing, thereby the logic that has played ABC three-phase pressure loss or any two-phase decompression of ABC is selected the purpose of phase.
L 9Voltage mistake phase sequence and secondary voltage mistake polarity timing circuit.This circuit is mainly by J 10-2, J 12-2, J 7-2, J 8-5 and J 4-1, J 5-1, J 6-1 normally opened contact, S 5Timer, D 24Light emitting diode is formed.When voltage transformer secondary polarity of voltage correct (being "-" polarity) and ABC standard positive phase sequence, L 1The J of circuit 4Relay; L 2The J of circuit 5Relay; L 3The J of circuit 6Relay is not because of reaching pickup value, its normally opened contact J 4-1, J 5-1, J 6-1 all is in open position.But when voltage transformer (VT) generation incorrect polarity (being "+" polarity), the voltage electrical secondary system will produce 1.73 times line voltage, this moment L 1The J of circuit 4Relay, L 2The J of circuit 5Relay, L 3The J of circuit 6Relay will start immediately, its normally opened contact J 4-1, J 5-1, J 6-1 closure starts timer S 5, record incorrect polarity time, D 24Light emitting diode is bright, sends fault-signal.When non-standard ABC phase sequence appears in primary voltage or secondary voltage, L 4The J of circuit 7Relay or L 6The J of circuit 8Relay all can start, its normally closed contact J 7-1, J 8-4 return disconnection, exclusive circuit L 8, to distinguish secondary voltage mistake polarity, non-ABC standard phase sequence and voltage no-voltage fault.Its normally opened contact J 7-2, J 8-5 closed S that start 5Timer, record phase sequence wrong time, light emitting diode D 24Bright, send fault-signal, with reach the record non-ABC standard phase sequence time, thereby for remedy clearing electric degree time parameter is provided.
J 10-2, J 12-2 normally opened contacts are as load supervision, the Lock effect.Because the watt-hour meter of high pressure measurement under non-loaded situation, is can not measure electric degree, so directly work as locking.J in this circuit 10-2, J 12The effect of-2 normally opened contacts is exactly when non-loaded, even when the wrong polarity of secondary voltage or non-ABC standard phase sequence take place, with locking J 7-2, J 8-5 normally closed contacts make S 5Timer does not start timing.
L 10Horizontal poor locking of electric current and current polarity wrong timing circuit.This circuit is by J 10-4, J 12-3, J 11-1, J 13-1 normally opened contact and J 10-3, J 12-4 normally closed contacts, timer S 6, light emitting diode D 25Form.Just often, since the load effect, reometer CB 1, CB 2Indication is all arranged, be bonded in the little conductor N of metal of ammeter pointer afterbody 1N 3, insert G 1, G 3Form the loop in the mercury cabin, start J 10, J 12Relay, its normally closed contact J 12-4, J 10-3 open, and circuit does not constitute the loop.When the A phase current breaks down, reometer CB 1Pointer is got back to " 0 " position, little conductor N 1Break away from mercury cabin G 1, J 10Relay electric-loss, its normally closed contact J 10-3 return, and start S 6Timer, record A phase current fault-time, light emitting diode D 25Bright, send fault-signal.When the C phase current breaks down, reometer CB 2Pointer is got back to " 0 " position, little conductor N 3Break away from mercury cabin G 3, J 12Relay electric-loss, its normally closed contact J 12-4 return, and start S 6Timer, record C phase current fault-time, light emitting diode D 25Bright, send fault-signal.
No matter the supervision of electric current secondary polarity is A phase or C phase, or AC two-phase generation incorrect polarity, reometer CB 1, CB 2All, be bonded in the little conductor N of metal of pointer afterbody to negative direction indication 2, N 4Insert G respectively 2, G 4The mercury cabin forms the loop, starts J 11, J 13Relay, its normally opened contact J 11-1, J 13-1 closure is with timer S 6Constitute the loop.
Suppose that the polarity fault appears in A phase secondary current, at this moment, reometer CB 1Pointer to negative direction indication, little conductor N 2Insert mercury cabin G 2, start J 11Relay, its normally opened contact J 11-1 closure starts S 6Timer, record A phase secondary current polarity fault-time, light emitting diode D 25Bright, send fault-signal.
If the polarity fault appears in C phase secondary current, this moment reometer CB 2Pointer to negative direction indication, little conductor N 4Insert mercury cabin G 4, starting relay J 13, its normally opened contact J 13-1 closure starts timer S 6, record C phase secondary current polarity fault-time, light emitting diode D 25Bright, send fault-signal.
If the polarity fault all takes place in AC two-phase secondary current, then reometer CB 1, CB 2All to negative direction indication, little conductor N 2, N 4Insert mercury cabin G 2, G 4, start J 11, J 13Relay, its normally opened contact J 11-1, J 13-1 closure starts S 6Timer, record trouble time, light emitting diode D 25Bright, send fault-signal, thereby reach the timing and the alarm effect of polarity fault.
L 11The voltage working signal circuit.This circuit is by normally opened contact J 9-5, J 1-5, J 2-5, J 3-5, normally closed contact J 7-3, J 8-7 and light emitting diode D 26Form.Its effect is monitor voltage work loop.Circuit L just often 6J 9Relay is under the situation of standard phase sequence ABC, and is charged in running order, its normally opened contact J 9-5 close logical; Circuit L 1J 1Relay, circuit L 2J 2Relay, circuit L 3J 3Relay is just often all in running order, its normally opened contact J 1-5, J 2-5, J 3-5 all in make-position; Circuit L 4J 7Relay, circuit L 6J 8Relay, because of not having voltage just often in the circuit at place, relay is not worked, its normally closed contact J 7-3, J 8-7 are in and return closure state, and this circuit structure is logical, light emitting diode D 26Bright, indicate working properly.Otherwise, work as phase sequence, voltage occurs all disconnecting this circuit, D when undesired 26Light emitting diode extinguishes, and the expression voltage power supply is unusual.
L 12Secondary voltage mistake polarity warning circuit.This circuit is by normally opened contact J 4-2, J 5-2, J 6-2 and loudspeaker Sy form, insert in the ac circuit of 220V.Just often, circuit L 1J 4Relay, circuit L 2J 5Relay, circuit L 3J 6Relay is because of resistance R 9, R 10, R 11Effect, be not in starting state, its normally opened contact J 4-2, J 5-2, J 6-2 open.When the voltage transformer secondary incorrect polarity, when producing 1.73 times line voltage, J 4Or J 5Or J 6Relay will start, its normally opened contact J 4-2 or J 3-2 or J 6-2 closures, the Sy loudspeaker send aural warning, thereby play wrong polarity alarm effect.
The present invention has the load supervision, the any two-phase decompression of ABC three-phase pressure loss or ABC, any single-phase decompression of ABC, electric current A phase defluidization or C phase defluidization, A phase secondary current incorrect polarity, C phase secondary current incorrect polarity, AC two-phase secondary current incorrect polarity and voltage secondary incorrect polarity, the phase sequence mistake, the self check of phase sequence, the phase-locked function of automatic control and ABC standard phase sequence, thereby played the metering supervision of high pressure measuring and supervising switch cabinet and the useful effect of timing.
In addition, the present invention also has the effect of distinguishing fault category and fault-signal and alarm.
The Figure of description homepage is a block diagram of the present invention.
Figure of description 2 exchanges the electrical secondary system wiring diagram for the wiring of PT of the present invention " V " type.
Figure of description 3 is phase sequence supervision sampling of the present invention and electric current supervision sampling DC control system wiring diagram.
Figure of description 4 is DCL of the present invention loop and central control system expansion wiring diagram.

Claims (6)

1, a kind of have supervision voltage, electric current, phase sequence, load and a voltage transformer (VT), secondary wiring of current mutual inductor, and the polarity fault and the high pressure measuring and supervising switch cabinet record trouble time are by voltage transformer secondary AB voltage and polarity watchdog circuit L 1, voltage transformer secondary BC voltage and polarity watchdog circuit L 2, voltage transformer secondary AC voltage and polarity watchdog circuit L 3, voltage transformer secondary BO voltage phase-locked circuit L 4, the self check of electrogoniometer, automatic control and test watchdog circuit L 5, phase sequence watchdog circuit L 6, current loading, polarity and Current Transformer Secondary electric current AC locking watchdog circuit mutually L 7, the current loading locking is selected timing circuit L mutually with the decompression logic 8, voltage mistake phase sequence and secondary voltage incorrect polarity timing circuit L 9, horizontal poor locking of electric current and current polarity wrong timing circuit L 10, voltage working signal circuit L 11, secondary voltage mistake polarity warning circuit L 12Form, it is characterized in that according to voltage transformer (VT) " V " the type mode of connection, the null characteristics of its secondary voltage circuit B phase-to-ground voltage in B ac circuit relatively, insert rectifier bridge LQ 4And on the DC B O loop after the rectification, install relay J 7, timer S 5As load, be connected on relay J 7Normally opened contact on.
2, examining the bright of the whiz girdle of giving birth according to the described of claim 1 crash guilt screen rinses on the rotating circular disk that the drooping plan of an ancient small-mouthed wine vessel knows the extensive Gan Jiu of bridle Turtle well, a bonding soft foil metal F, as electrogoniometer M according to different phase sequences to just, during opposite spin, the soft foil metal F on the disk respectively with fixed contact M 1, M 2Connect, and form separately independently electric loop.
3, according to claim 1, high pressure measuring and supervising switch cabinet is characterized in that reometer CB 1, the position of little weight of pointer afterbody on, the little conductor N of each bonding metal 1, N 2, as reometer CB 1According to the Current Transformer Secondary sense of current, during the size swing, drive little conductor N 1, N 2, little conductor N 1, N 2, respectively with G 1, G 2The mercury chamber configuration also forms separately independently electric loop.
4, according to claim 1, high pressure measuring and supervising switch cabinet is characterized in that reometer CB 2The position of little weight of pointer afterbody on, the little conductor N of each bonding metal 3, N 4, as reometer CB 2According to the Current Transformer Secondary sense of current, during the size swing, drive little conductor N respectively 3, N 4, little conductor N 3, N 4, respectively with G 3, G 4Mercury cabin structure is logical and form separately independently electric loop.
5, according to claim 1, high pressure measuring and supervising switch cabinet is characterized in that L 1Exchange resistance R partly in the circuit 1, R 2, L 2Exchange resistance R partly in the circuit 3, R 4, L 3Exchange resistance R partly in the circuit 5, R 6, respectively with rectifier bridge LQ 1, LQ 2, LQ 3Serial connection plays the hypotensive effect in the circuit, and in any phase decompression of ABC, forms in the interchange secondary voltage circuit of nature serial connection, also plays hypotensive effect.
6, according to claim 1, high pressure measuring and supervising switch cabinet is characterized in that the operating voltage of timer S supplied with by dry cell.
CN 88102324 1988-04-20 1988-04-20 High pressure measuring and supervising switch cabinet Pending CN1037037A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 88102324 CN1037037A (en) 1988-04-20 1988-04-20 High pressure measuring and supervising switch cabinet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 88102324 CN1037037A (en) 1988-04-20 1988-04-20 High pressure measuring and supervising switch cabinet

Publications (1)

Publication Number Publication Date
CN1037037A true CN1037037A (en) 1989-11-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 88102324 Pending CN1037037A (en) 1988-04-20 1988-04-20 High pressure measuring and supervising switch cabinet

Country Status (1)

Country Link
CN (1) CN1037037A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103399184A (en) * 2013-08-05 2013-11-20 国家电网公司 Joint junction box convenient for adjusting phase sequence

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103399184A (en) * 2013-08-05 2013-11-20 国家电网公司 Joint junction box convenient for adjusting phase sequence
CN103399184B (en) * 2013-08-05 2015-08-26 国网冀北电力有限公司廊坊供电公司 Conveniently can adjust the combined connection box of phase sequence

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