CN2313228Y - Automatic changing-over device for electric-energy meters of different measurement range - Google Patents

Automatic changing-over device for electric-energy meters of different measurement range Download PDF

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Publication number
CN2313228Y
CN2313228Y CN 97231981 CN97231981U CN2313228Y CN 2313228 Y CN2313228 Y CN 2313228Y CN 97231981 CN97231981 CN 97231981 CN 97231981 U CN97231981 U CN 97231981U CN 2313228 Y CN2313228 Y CN 2313228Y
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CN
China
Prior art keywords
electric energy
connects
energy meter
input
relay
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN 97231981
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Chinese (zh)
Inventor
徐启战
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徐启战
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Publication date
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Priority to CN 97231981 priority Critical patent/CN2313228Y/en
Application granted granted Critical
Publication of CN2313228Y publication Critical patent/CN2313228Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model provides an automatic switching device for electric energy meters with different measurement ranges, comprising a relay 32J which controls the power supply of the device and two relays 1ZJ, 2ZJ which can respectively control alternating current contactors 1C, 2C coupled in two electric energy meters with different measurement ranges. The utility model is characterized in that the utility model also comprises two NOT-AND gates IC1, IC 2 and a collector F of the charge, the discharge and the signal of a capacitance. According to the verification lowest point of the electric energy meter KWH1, signal control relays 1ZJ, 2ZJ with current of different sizes can be detected out to complete the automatic switch of electric energy meters with different measurement ranges, achieving the purpose of measurement with high precision.

Description

The electric energy meter automatic switching control equipment of different ranges
The utility model relates to a kind of according to the payload difference, makes the electric energy meter automatic switching control equipment of different ranges.
At present, electric energy metrical all is the electric energy meter that adopts a respective volume according to payload, but works as power consumption less than the minimum checkpoint of electric energy meter, electric energy meter error increases, can not accurately measure, when load current is lower than electric energy meter rated current 1%, electric energy meter will stop metering.For accurate metering, the circuit diagram wiring that must switch mutually by the electric energy meter of the different ranges of switch control by Fig. 1.When in Fig. 1, using TV university, with the metering of high capacity electric energy meter KWH1 place in circuit,, control another A.C. contactor 2C by hand switch K2 low capacity electric energy meter KWH2 place in circuit is measured at power consumption hour by K switch 1 control A.C. contactor 1C.
Task of the present utility model provides a kind of according to the payload difference, makes the electric energy meter automatic switching control equipment of corresponding two ranges that vary in size.
Task of the present utility model is finished as follows, and the switch of controlling two A.C. contactors is replaced by two relays.For convenience of explanation, with following description of drawings it.
Fig. 2 is an electrical schematic diagram of the present utility model.
The electric energy meter automatic switching control equipment of different ranges includes the relay 32J of control this a device power supply and two the vary in size electric energy meter KWH1 of range of control access two respectively in Fig. 2, the A.C. contactor 1C of KWH2 and relay 12J and the 22J of 2C, it is characterized in that: two Sheffer stroke gate IC1, IC2, resistance R 1 and capacitor C 1 are serially connected between the direct supply both positive and negative polarity, node directly connects IC1 input end 2, another road of node connects IC1 input end 1 through resistance R 2, capacitor C 2 is connected between IC1 input end 21 dc power cathodes, triode VT1, the emitter of VT2 and VT3 connects dc power cathode, its three collectors all connect the input end 1 of IC1, its base stage respectively by each signal picker F promptly the electromagnetic wire on the magnet ring of every watt-hour meter A all connect dc power cathode, IC1 output terminal 4 one tunnel directly connects the input end 2 of IC2, another road connects the input end 1 of IC2 through resistance R 3, Third Road connects the positive pole of isolating diode VC1, be connected on behind the coils from parallel connection of coils of capacitor C 3 and relay 12J between the negative pole of the negative pole of VC1 and direct supply, the output terminal 4 of IC2 connects isolating diode VC2 positive pole, is connected on behind the coils from parallel connection of coils of capacitor C 4 and relay 22J between the negative pole and power cathode of VC2.Magnet ring is passed in the wiring that needs only every reometer A during installation.
The electric energy meter that adopts this device can finish different ranges automaticallyes switch, and reaches accurate metering.As a voltage 10KV/400V, capacity 320KVA power transformer is answered distribution stream 600A/5A current transformer, 07862-3 (6) electric energy meter, i.e. electric energy meter KWH1.When load was lower than 36A, electric energy meter error increased, and can not accurately measure.Load current is during less than 3.6A, and electric energy meter will stop operating, and not measure.If a 07862-10 (40) A electric energy meter KWH2 is installed again by this device, when load current drops to 1A, also can accurately measure, accuracy rate has improved 36 times; When load current during less than 0.1A, electric energy meter KWH2 will stop operating, and not measure, and compare 3.6A and 0.1A with the former, and the metering volume has also improved 36 times.
The course of work is as follows, and when beginning to connect alternating current, relay 32J gets, normally opened contact 32J closure, this device power connection, power supply charges to capacitor C 1 and C2 by resistance R 1, R2, because C1, C2 terminal voltage can not be suddenlyd change, 1 end of Sheffer stroke gate IC1 is electronegative potential, and 4 ends are noble potential, and relay 12J gets, normally closed contact 12J closure, A.C. contactor 1C gets electric, its closing of contact, and electric energy meter KWH1 works by load current.Because 1,2 ends of IC2 are noble potential, 4 ends then are electronegative potential, and 22J does not have electricity, and 2C does not have electricity yet, and electric energy meter KWH2 does not work.C1, C2 charging 10 minutes, when load current does not reach electric energy meter KWH1 verification minimum point, the C2 terminal voltage reaches the 1 end turnover voltage of IC1, promptly 1 end is noble potential, and 4 ends are electronegative potential, when the C3 discharge is kept electric current less than 12J, 12J discharges its normally opened contact 12J, 1C outage, the contact disconnects, electric energy meter KWH1 no-load current and quitting work, when 4 ends of IC1 are electronegative potential, 1,2 ends of IC2 also are electronegative potential, and its 4 end is noble potential, and 22J gets, contact 22J closure, 2C gets electric, its closing of contact, and load current is by electric energy meter KWH2 work.When load surpassed electric energy meter KWH1 verification minimum point, the signal that signal picker F gathers made triode VT conducting, 1,2 terminal potentials of IC1 was drawn be electronegative potential, 4 ends are noble potential then, and 12J gets electric, the 12J closure, 1C gets electric, its closing of contact, and load current is worked by electric energy meter KWH1.When 4 ends of IC1 were noble potential, 1,2 ends of IC2 also were noble potential, and 4 ends of IC2 are electronegative potential, and when the C4 discharge was kept electric current less than 22J, 22J discharged, its contact 22J1,2C outage, and electric energy meter KWH2 quits work.

Claims (1)

1, the electric energy meter automatic switching control equipment of different ranges includes the relay 32J of this device of a control power supply and two the vary in size electric energy meter KWH1 of range of control access two respectively, the A.C. contactor 1C of KWH2 and relay 12J and the 22J of 2C, it is characterized in that: two Sheffer stroke gate IC1, IC2, resistance R 1 is serially connected between the direct supply both positive and negative polarity, node directly connects IC1 input end 2, another road of node connects IC1 input end 1 through resistance R 2, capacitor C 2 is connected between IC1 input end 1 dc power cathode, triode VT1, the emitter of VT2 and VT3 connects dc power cathode, its three collectors all connect the input end 1 of IC1, its base stage is respectively by the i.e. electromagnetic wire on the magnet ring of each signal picker F, all connect negative pole, IC1 output terminal 4 one tunnel directly connects the output terminal 2 of IC2, another road connects the input end 1 of IC2 through resistance R 3, Third Road connects the positive pole of isolating diode VC1, be connected on behind the coils from parallel connection of coils of capacitor C 3 and relay 12J between the negative pole of the negative pole of VC1 and direct supply, the output terminal 4 of IC2 connects isolating diode VC2 positive pole, is connected on behind the coils from parallel connection of coils of capacitor C 4 and relay 22J between the positive pole and power cathode of VC2.
CN 97231981 1997-12-31 1997-12-31 Automatic changing-over device for electric-energy meters of different measurement range Expired - Fee Related CN2313228Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 97231981 CN2313228Y (en) 1997-12-31 1997-12-31 Automatic changing-over device for electric-energy meters of different measurement range

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 97231981 CN2313228Y (en) 1997-12-31 1997-12-31 Automatic changing-over device for electric-energy meters of different measurement range

Publications (1)

Publication Number Publication Date
CN2313228Y true CN2313228Y (en) 1999-04-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 97231981 Expired - Fee Related CN2313228Y (en) 1997-12-31 1997-12-31 Automatic changing-over device for electric-energy meters of different measurement range

Country Status (1)

Country Link
CN (1) CN2313228Y (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105259403A (en) * 2015-11-06 2016-01-20 上海大众汽车有限公司 Special current test system and current switching method for vehicle information system test bench
CN107063620A (en) * 2016-12-29 2017-08-18 中国航天空气动力技术研究院 Wind-tunnel total pressure measurement transducer range automatic switching control equipment
CN109477864A (en) * 2016-07-21 2019-03-15 萨基姆通讯能源及电信联合股份公司 Configurable ammeter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105259403A (en) * 2015-11-06 2016-01-20 上海大众汽车有限公司 Special current test system and current switching method for vehicle information system test bench
CN109477864A (en) * 2016-07-21 2019-03-15 萨基姆通讯能源及电信联合股份公司 Configurable ammeter
CN109477864B (en) * 2016-07-21 2021-04-20 萨基姆通讯能源及电信联合股份公司 Configurable electricity meter
CN107063620A (en) * 2016-12-29 2017-08-18 中国航天空气动力技术研究院 Wind-tunnel total pressure measurement transducer range automatic switching control equipment

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CF01 Termination of patent right due to non-payment of annual fee
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