CN2066991U

CN2066991U - Voltage drop recorder

Info

Publication number: CN2066991U
Application number: CN 89211674
Authority: CN
Inventors: 申卫民
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-09-27
Filing date: 1989-09-27
Publication date: 1990-12-05

Abstract

The utility model relates to a voltage drop recorder which belongs to the monitoring instrument in an electric energy metering device, and is suitable for recording the time and the frequency of PT pressure loss of the high voltage power users. The utility model makes use of a phase shift circuit to monitor a PT secondary loop, makes use of a CT secondary current as a working power supply to sample from the PT secondary loop to control the on-off of the power supply through a relay. When measurement is normal or the entire electric network is powered off, the voltage drop recorder does not record; when the voltage of one phase, two phase or three phase is dropped, namely, the metering device is in the event of the failure, the voltage drop recorder begins to work to record the time and frequency of voltage drop, which provides the reliable digit reference for complement recording electrical quantity, and simultaneously an alarm signal is sent out.

Description

Voltage drop recorder

The decompression registering instrument belongs to the supervision instrument in a kind of electric power meter, is suitable for writing down the time and the number of times of high-tension electricity user PT decompression.

In present high-tension electricity user's measuring apparatus, often, bring economic loss to electric power enterprise because of the few quantity calculation of PT decompression.It is that CN2031100V is a domestic patent that existing monitoring arrangement has the patent No., what introduce is a kind of supervision gauge that is similar to induction meter, it comprises a control section and a metering section, during the PT decompression, metering section is by current drives, this record be the electric current semi-invariant, as the clearing electricity charge, calculate the electricity charge by the electric current semi-invariant, because of the variation of power rate then is difficult to accomplish calculate accurately.

The objective of the invention is: a kind of decompression registering instrument is provided, and the time and the number of times of PT decompression when this decompression registering instrument can write down the high-tension electricity user power utilization accurately reach the purpose of mending quantity calculation more accurately according to this record.

The present invention finishes as follows: adopt a quartz clock movement as timing element, the CT secondary current after rectification, filtering, voltage stabilizing as the working power of crystal clock.Be connected to cut-offfing of a phase-shift circuit Control work power supply at the PT secondary circuit; Behind arbitrary phase, two-phase or three-phase pressure loss, immediately timing crystal clock and working power are connected, if the CT secondary have electric current be power consumer in electricity consumption, crystal clock is just worked; Thereby the time of PT secondary decompression when guaranteeing the electricity consumption of accurate recording power consumer, and utilize the number of times of an electromagnetic counter record trouble decompression.

The utility model adopts the PT secondary voltage as the control power supply because of adopting the CT secondary current as working power, thus the time and the number of times of PT secondary failure can the electricity consumption of accurate recording power consumer the time.

The concrete structure of utility model is provided by following embodiment and accompanying drawing thereof.

Fig. 1, Fig. 2 are according to the decompression registering instrument key wiring diagram that the utility model proposes.

This device comprises two transformer B ₁, B ₂, 14 diode D ₁～D ₁₄, 6 triode BG ₁～BG ₄, 7 capacitor C ₁～C ₇, 1 voltage relay DJ ₁, 1 crystal clock ZJ, 1 note time relay DJ ₂, 6 resistor R ₁～R ₄

R ₁, R ₂, R ₃, R ₄, C ₁, C ₂Phase-shift circuit connects (see figure 1), R by negative-phase sequence ₁One termination V _B, the other end and R ₂And C ₁Series connection, C ₂One termination V _A, the other end and R ₄And R ₃Series connection, C ₁With R ₃The V that inserts in parallel _CFrom R ₁With R ₂And R ₃With R ₄Mid point is got a voltage output point (1), (2), and this voltage is through D ₁～D ₄Bridge full-wave rectifier, C ₃BG is given in filtering ₁The be utmost point forward operating voltage is provided; The PT secondary circuit just often, (1), (2) end no-voltage output, D _ABe the voltage stabilizing clamp diode, oppositely be serially connected with this loop phase shift monitoring circuit zero shift voltage is played clamping action.Transformer B ₁Elementary (3), (4) terminated line voltage V _AC, secondary through D ₆～D ₉Bridge full-wave rectifier, C ₄Filtering is voltage relay DJ ₁And C ₇Working power is provided; DJ ₁Be serially connected in this positive source and BG ₂Between the C utmost point, R ₂Be BG ₂Bias current and BG ₁Current-limiting resistance; The PT secondary circuit just often, BG ₁Be in and end, BG ₄Be in the saturation conduction state, DJ ₁Adhesive; (5), (6) end and (9), (10) end and (17), (18) end be in and open, (7), (8) end is in closure with (11), (12) end.

Transformer

Elementary access CT secondary current In, secondary through D ₁₀～D ₁₃Bridge rectifier, this bridge rectifier output cathode and D ₁₄, BG ₂, BG The mu balanced circuit positive pole, the C that form ₂Positive pole, quartz clock movement ZJ positive pole, BG ₂B is extremely in parallel; Negative pole and D ₁₄, BG ₂, BG

The mu balanced circuit positive pole, the JK that form ₂(9) end is in parallel; C ₂Negative pole and quartz clock movement ZJ negative pole, C ₂Negative pole, JK ₂(10) end, the parallel connection of (11) end; BG ₂The b utmost point with

Anodal, JK ₂(12) end is in parallel; BG ₃With BG ₄Form complex pipe, the complex pipe C utmost point and DJ ₂(13) end connects; Negative pole and R ₆, C ₇And working power negative pole parallel connection; R ₄The other end and DJ ₂(14) end and JK ₁(5) end is in parallel; C ₇Positive pole and JK ₁(6) end and JK ₁(7) end is in parallel.

D ₁₄, BG ₃, BG ₄The mu balanced circuit of forming is to utilize D ₁₄And BG ₃, BG ₄Voltage clamp is carried out in the pressure drop of be utmost point door, when electric current I n when 0.2～5A changes, this circuit output dc voltage is 1.3～1.6 volts, as the working power of quartz clock movement ZJ.

When the arbitrary phase decompression of three-phase voltage, (1), (2) end output one voltage is through D ₁～D ₄Rectification, C ₃After the filtering, make BG ₁By saturated by entering, BG ₃End DJ by saturated entering ₁Discharge.

When two-phase or three-phase pressure loss, DJ ₁To discharge by no working power.At relay DJ ₁The moment that discharges, JK ₂(9), (10) hold JK ₁(5), (6) end and JK ₄(17), (18) end is connected JK simultaneously ₁(7), (8) hold JK ₂(11), (12) hold JK ₂(15), (16) end is opened BG simultaneously ₃, BG ₄Be in the saturation conduction state, C ₇By remembering time relay DJ ₂, and BG ₄The discharge of the ce utmost point makes note time relay adhesive once, along with prolongation, the C of time ₄Be full of and end, BG ₃, BG ₄End C by saturated entering ₅Enter the filtering situation, crystal clock ZJ enters the job record decompression time, and when normally having a power failure, In is zero, BG ₂Ended by non-transformer, crystal clock does not clock because of non-transformer, C ₇Pass through R ₂Discharge electric charge, during decompression, JK ₄(16), (18) end provides a docking point to report to the police.JK ₂(11), (12) end is C ₄Discharge loop.

In above-mentioned decompression writing circuit, R ₁, R ₂, R ₃, R ₄, C ₁, C ₂, B ₂Should satisfy following condition:

R ₁＝2R ₂＝R ₃＝2R ₄C ₁＝C ₂

R ₁≥2k，

R ₁, R ₂, R ₃, R ₄, resistance error≤10%,

C ₁, C ₂Appearance value error≤10%,

B ₂Inferior, elementary winding turns is than (n ₂)/(n ₁)＞50,

Elementary input impedance≤0.035 Ω.

In foregoing circuit, R ₁, R ₂, R ₃, R ₄, C ₁, C ₂The phase-shift circuit of forming can be by R among Fig. 2 ₂₁, R ₂₂, R ₂₁, R ₂₂, the phase-shift circuit formed replaces C ₂₁One termination V _A, the other end and R ₂₁, C ₂₁, R ₂₂Series connection, R ₂₂Another termination V _C, R ₂₁With C ₂₂Mid point meets V ₂, from C ₂₁With R ₂₁And C ₂₂With R ₂₂Between power taking press output point (1), (2), this phase-shift circuit connects by negative-phase sequence, the PT secondary circuit just often, (1), the no-voltage output of (2) end, when the arbitrary phase decompression of three-phase, (1), (2) end output one voltage, through above-mentioned same processing, but the time of recording pressure loss and number of times.

In this circuit, R ₂₁, R ₂₂, C ₂₁, C ₂₂Must satisfy following condition:

R ₂₁≥2k，

R ₂₁, R ₂₂Impedance error≤10%,

C ₂₁, C ₂₂Appearance value error≤10%.

This voltage drop recorder is adapted to various high pressure users through the voltage transformer metering as the supervision instrument in the electric power meter, and metering device just often, it is record not, when PT one phase, when two-phase or three-phase pressure loss, voltage drop recorder is started working, the time of recording pressure loss and number of times, and develop simultaneously alarm signal, when electrical network normally had a power failure, it is record not also, what record is the time of metering device fault, provides than the correct time foundation for mending quantity calculation.

Claims

1, a kind of supervision instrument that belongs to electric power meter includes the decompression registering instrument of quartz clock movement, it is characterized in that, above-mentioned quartz clock movement is connected to decompression and clocks and remember secondary circuit, and this circuit is by 14 diode (D ₁-D ₁₄), 6 triode (BG ₁-BG ₆), 6 resistor (R ₁-R ₆), 7 capacitor (C ₁-C ₇), 2 transformer (B ₁, B ₂), a DC relay (DJ ₁), 1 note time relay (DJ ₂), a quartz clock movement ZJ forms; Wherein: R ₁With R ₂And C ₁Series connection, R ₃With R ₄And C ₂Series connection, C ₁With R ₂And B ₁Input end (3) parallel connection, C ₂With B ₁Input end (4) parallel connection, R ₁With R ₂And R ₄With R ₂Mid point is got (1), (2) end and D respectively ₁-D ₄Bridge rectifier connects, this bridge-type output cathode and C ₂Positive pole and D ₅The negative pole parallel connection, D ₅Positive pole and BG ₁The series connection of the b utmost point, BG ₁The C utmost point and R ₅And BG ₂B is extremely in parallel, BG ₂The c utmost point and DJ ₁Series connection, B ₁Output terminal and D ₆-D ₉Bridge rectifier connects, this bridge-type output cathode and R ₅, DJ ₂, JK ₁(8) end, C ₄Anodal in parallel, negative pole and D ₁-D ₄The bridge-type output negative pole, C ₂Negative pole, BG ₁The e utmost point, BG ₂The e utmost point, C ₄Negative pole, BG ₄The e utmost point, R ₆, C ₇The negative pole parallel connection, JK ₁(7) end and (6) end and C ₇Anodal in parallel, JK ₁(5) end and R ₆And DJ ₂(14) end is in parallel, DJ ₂(13) end and BG ₂The C utmost point and BG ₄C is extremely in parallel; B ₂Output and D ₁₀-D ₁₃Bridge rectifier connects, this bridge-type output cathode and C ₅Anodal, D ₁₄Anodal, BG ₆The C utmost point, quartz clock movement ZJ positive pole, BG ₂B is extremely in parallel, negative pole and BG ₆The e utmost point and JK ₂(9) end is in parallel, JK ₂(10) end and (11) end, C ₆Negative pole, C ₅Negative pole, the parallel connection of quartz clock movement ZJ negative pole, JK ₂(12) end and C ₆Positive pole, BG ₂The e utmost point, BG ₄B is extremely in parallel, BG ₅The e utmost point and BG ₂The b utmost point connects, D ₁₄Negative pole and BG ₅The b utmost point connects.In this circuit, R ₁, R ₂, R ₃, R ₄, C ₁, C ₂, B ₂Must meet the following conditions:

R ₁=2R ₂=R ₃=2R ₄C ₁=C ₂，

\frac{R_{1} + R_{2}}{X_{cl}} = \sqrt{3}

R ₁≥2K，

R ₁, R ₂, R ₃, R ₄Resistance error≤10%,

C ₁, C ₂Appearance value error≤10%,

Inferior, elementary winding turns is than (n ₂)/(n ₁)＞50,

B ₂Elementary input impedance≤0.035 Ω.

2, decompression registering instrument according to claim 1 is characterized in that at R ₁, R ₂, R ₃, R ₄, C ₁, C ₂In the circuit of forming, C ₂One end, R ₁One end and R ₃With C ₁Parallel connected end, insert three-phase voltage V _A, V _B, V _C, and from R ₁With R ₂And R ₃With R ₄Mid point is got a voltage output point (1), (2), in case the arbitrary phase decompression of this three-phase voltage, (1), (2) end promptly has voltage output.

3, according to claim 1,2 described decompression meter record instrument, it is characterized in that DJ ₁Connect through a control and power-supply circuit and three-phase voltage, three-phase voltage just often, DJ ₁Adhesive, in case three-phase voltage one phase, two-phase or the whole decompressions of three-phase, DJ ₁Discharge immediately.

4,, it is characterized in that quartz clock movement ZJ is through a rectification and mu balanced circuit and Jk according to claim 1,2,3 described decompression registering instruments ₂(9), (10) hold and an electric current I n connects, in case DJ ₂Discharge Jk ₂(9), the demand working of (10) end, if electric current I n is non-vanishing, ZJ is clocked by this function of current immediately.

5,, it is characterized in that described decompression clocks and remember in the secondary circuit R by the described decompression registering instrument of claim 1 ₁, R ₂, R ₃, R ₄, C ₁, C ₂The circuit of forming can be by R ₂₁, R ₂₂, C ₂₁, C ₂₂The circuit of forming is replaced, in this circuit:

Series connection, and must meet the following conditions:

R ₂₁, R ₂₂Resistance error≤10%,

Appearance value error≤10%.

6, the decompression registering instrument of No. 52 being stated by claim is characterized in that R ₂₁, R ₂₂, C ₂₁, C ₂₂In the circuit of forming, C ₂₁One end, R ₂₁With

Mid point, R ₂₂One termination is gone into three-phase voltage V _A, V _B, V _C, and from C ₂₁With R ₂₁And C ₂₂With R ₂₂Mid point is got a voltage output point (1), (2), in case the arbitrary phase decompression of this three-phase voltage, (1), (2) end promptly has voltage output.