CN2310411Y - Microsecond-level overvoltage protection device - Google Patents
Microsecond-level overvoltage protection device Download PDFInfo
- Publication number
- CN2310411Y CN2310411Y CN 97248576 CN97248576U CN2310411Y CN 2310411 Y CN2310411 Y CN 2310411Y CN 97248576 CN97248576 CN 97248576 CN 97248576 U CN97248576 U CN 97248576U CN 2310411 Y CN2310411 Y CN 2310411Y
- Authority
- CN
- China
- Prior art keywords
- relay
- load end
- power input
- coil
- thermistor
- Prior art date
- 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
Links
- 239000003381 stabilizer Substances 0.000 claims description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 6
- 230000002457 bidirectional effect Effects 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 5
- 239000003990 capacitor Substances 0.000 claims description 4
- 230000001012 protector Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052754 neon Inorganic materials 0.000 description 1
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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- Emergency Protection Circuit Devices (AREA)
Abstract
The microsecond level overvoltage protector has low speed and low power, and has normally open relay contact and inductor connected serially in the power supply circuit, thermistor and voltage sensitive electronic switch connected serially in the load, relay coil connected parallelly in the voltage sensitive electronic switch, and starting switch circuit.
Description
The utility model belongs to a kind of overvoltage protection of electrical equipment.
In existing overvoltage protector, relay over-pressure safety device slow motion, incompatible protection to the secondary power supply circuit; Piezo-resistance protective circuit power is little, is difficult for accurately adjusting, and is difficult for recovering; Tandem silicon controlled rectifier protecting circuit g-load ability exists to cost an arm and a leg simultaneously, and lightning protection capability is poor, needs deficiencies such as certain startup angle; The mechanical type over-pressure safety device is affected by environment big, and can not recover automatically.
It is big that the utility model aims to provide a kind of power, and power consumption is few, and reliable in action can be cut off the overvoltage protection of circuit rapidly in the microsecond level time when producing overvoltage.
The technical scheme that realizes above-mentioned purpose is (referring to implementing illustration): this device is provided with housing, and the circuit in the housing is provided with power input (N
1), (N
o), load end (M
1), (M
o), it is characterized in that, at power input (N
1) to respective load end (M
1) between be in series with relay (J successively
1) normally opened contact (J
1-1) and inductance (L), load end (M
1) and (M
o) between in parallel one by thermistor (R
T) and the branch road of pressure-sensitive electronic switch series connection, relay (J
1) coils from parallel connection of coils is at pressure-sensitive electronic switch two ends, at thermistor (R
T) and relay (J
1) coil link (A) point with power input (N
1) between connect one can be manually or automatically with relay coil J
1Starting switch circuit with power connection.
Operation principle of the present utility model is generally, to pass through manual or the automatic and power input connection with relay coil of starting switch circuit earlier, its normally opened contact J
1-1Closure is with power input and load end M
1Connect, power to the load, when input produces overvoltage, pressure-sensitive electronic switch conducting, load current flow is crossed the temperature-sensitive resistance R greatly
TThe branch road of connecting with pressure-sensitive electronic switch, and on inductance L, produce very big pressure drop, and first fast reaction ground moment is restrained the load both end voltage, and the conducting of pressure-sensitive electronic switch is again simultaneously with the relay coil short circuit on the other hand, through one period lag time, relay normally open contact J
1-1Open, cut off the electric circuit, play the effect of overvoltage protection.Described pressure-sensitive electronic switch is meant that the voltage that is applied to it surpasses thyristor that certain value can conducting, piezo-resistance, neon tube etc.
This device is after overvoltage produces; can make the conducting in the extremely short time of pressure-sensitive electronic switch; also fail to move at relay system and cut off the dummy load branch road that the pressure-sensitive electronic switch that utilizes thermistor and conducting before load power source is protected conscientiously earlier forms and shunt load current; and with inductance L with the overvoltage transient absorption; again with dump, therefore form and divide two sections relays to carry out the form of overvoltage protection when treating the actuating of relay.The utility model had both utilized relay power big; withstand voltage high advantage; the quick on state characteristic that has utilized pressure-sensitive electronic switch again can be in about 80 microseconds after overvoltage produces cooperates the overvoltage protection of realization to circuit with thermistor and inductance; wherein adopt thermistor not only can reduce the resistance volume; and under the excessive situation of electric current; utilize the characteristic of the hurried increase of its resistance, self and pressure-sensitive electronic switch loop are played a protective role.
Accompanying drawing 1 the utility model circuit theory schematic diagram
Accompanying drawing 2 the utility model embodiment 1 circuit theory diagrams
Accompanying drawing 3 the utility model embodiment 2 circuit theory diagrams
Accompanying drawing 4 the utility model embodiment 3 circuit theory diagrams
Embodiment 1 (referring to Fig. 2)
This example is provided with power input N
1, N
o, load end M
1, M
o, at power input N
1With corresponding load end M
1Between be in series with relay J successively
1Normally opened contact J
1-1And inductance L, at load end M
1And M
oBetween in parallel one by thermistor R
TWith piezo-resistance R
V1The branch road of series connection, relay J
1Coils from parallel connection of coils at the piezo-resistance two ends, described starting switch circuit is at thermistor and relay coil link an A and power input N
1Between meet a normally open push button switch Q.
This routine course of work is generally to press earlier and often open button Q, engage relay J
1Coil, normally opened contact J
1-1Closure makes load and power connection, when input produces overvoltage, and piezo-resistance R
V1Conducting produces instantaneous pressure on the inductance L, piezo-resistance is with relay coil J simultaneously
1Short circuit, its normally opened contact J
1-1Disconnect, cut off the electric power supply.
Embodiment 2 (referring to Fig. 3)
This routine pressure-sensitive electronic switch is to adopt bidirectional triode thyristor pipe SCR, and concrete structure is, at load end M
1And M
oBetween in parallel one by thermistor R
TWith the branch road of bidirectional triode thyristor pipe SCR series connection, relay J
1Coils from parallel connection of coils at bidirectional triode thyristor pipe two ends, these silicon controlled circuits for triggering are at power input N
1And N
oBetween in parallel one by current-limiting resistance R
1With transformer L
1The branch road of series connection, transformer secondary output coil L
2One end is by voltage-stabiliser tube D
W1Connect the SCR control level, a termination controllable silicon cathode.Described starting switch circuit also is at thermistor and relay coil link an A and power input N
1Between meet a normally open push button switch Q.
Embodiment 3 (referring to Fig. 4)
This routine employing can be opened automatically, but the starting switch circuit of overvoltage outage back automatic recovery of power supply under normal voltage, and its structure is, with power input N
1Meet rectifier diode D
1, diode other end B meets load end M by several branch roads
1, the one tunnel is by series connection R
3, R
4The bleeder circuit that forms meets load end M
1, the one tunnel meets current-limiting resistance R
5, R
5Other end C point is leaded up to switch triode T
1Meet load end M
1, lead up to integrating capacitor C
1Meet load end M
1, switch triode T
1Base stage and R
3, R
4Dividing point joins, and the C point is gone back and relay J
2Coil one end joins J
2Coil other end D point one tunnel is through the voltage-stabiliser tube D of series connection
W2, resistance R
6Meet load end M
1, the one tunnel through T
2, T
3The compound transistor of forming meets load end M
1, the compound transistor base stage is connected on voltage-stabiliser tube D
W2With resistance R
6Tie point on, thermistor R
TWith relay J
1Coil tie point A is by current-limiting resistance R
2, R
1And relay J
2Normally opened contact J
2-1Meet power input N
1, this routine pressure-sensitive electronic switch also is to adopt the bidirectional triode thyristor pipe, the structure of its circuits for triggering and embodiment 3 is basic identical, transformer L
1Pass through resistance R
1With normally opened contact J
2-1Meet power input N
1, relay J
2Normally opened contact J
2-1A two ends normally open push button switch Q in parallel.
This routine course of work is J
1-1When being in off state, power input N
1Through rectifier diode D
1And resistance R
5Give capacitor C
1Charging, the savings electric energy is when charging voltage surpasses voltage-stabiliser tube D
W2Threshold voltage the time, T
2And T
3The compound transistor conducting that is combined into, relay J
2The coil conducting, its normally opened contact J
2-1Closure, engage relay J
1Coil, normally opened contact J
1-1Conducting realizes powering up J automatically to load
1-1After the conducting, rectifier diode D
1Stop to J
2Coil power supply, J
2-1Disconnect; When input produced overvoltage, process was the same as described above, controllable silicon conducting, normally opened contact J
1-1Open, cut off power supply, load is realized overvoltage protection, do not recover normally bleeder circuit R as input voltage
3, R
4Promptly can give switch triode T
1Base stage-individual higher conducting voltage is satisfied it and is closed capacitor C
1Can not charge relay J
2The coil no current passes through, and powers up can for this moment main circuit automatically, when input voltage recovers just often rectifier diode D
1Conducting once more, switch transistor T
1Not high enough because of the base stage partial pressure value, to locate to carry and end state, power supply is through R
5To C
1Charging, voltage raises, relay J
2The longitude circle conducting promptly can recover to power up to load again as previously mentioned automatically.
This example is also at the anti-lightning strike piezo-resistance R of power input in parallel
V2
Claims (4)
1, microsecond level over-pressure safety device is provided with power input (N
1), (N
o), load end (M
1), (M
o), it is characterized in that, at power input (N
1) to respective load end (M
1) between be in series with relay (J successively
1) normally opened contact (J
1-1) and inductance (L), load end (M
1) and (M
o) between in parallel one by thermistor (R
T) and the branch road of pressure-sensitive electronic switch series connection, relay (J
1) coils from parallel connection of coils is at pressure-sensitive electronic switch two ends, at thermistor (R
T) and relay (J
1) coil link (A) point with power input (N
1) between connect one can be manually or automatically with relay coil (J
1) with the starting switch circuit of power connection.
2, microsecond level over-pressure safety device according to claim 1 is characterized in that, described pressure-sensitive electronic switch is bidirectional triode thyristor pipe (SCR), and concrete structure is, at load end (M
1) and (M
o) between in parallel one by thermistor (R
T) and the branch road of bidirectional triode thyristor pipe (SCR) series connection, relay (J
1) coils from parallel connection of coils at the thyristor two ends, these silicon controlled circuits for triggering are at power input (N
1) and (N
o) between in parallel one by current-limiting resistance (R
1) and transformer (L
1) series connection branch road, transformer secondary output coil (L
2) end is by voltage-stabiliser tube (D
W1) connect SCR control level, a termination controllable silicon cathode.
3, microsecond level over-pressure safety device according to claim 1 and 2 is characterized in that, described starting switch circuit is at thermistor and relay coil link an A and power input (N
1) between connect a normally open push button switch.
4, microsecond level over-pressure safety device according to claim 1 and 2 is characterized in that, with power input (N
1) meet rectifier diode (D
1), the diode other end (B) meets load end (M by several branch roads
1), the one tunnel is by series connection (R
3), (R
4) bleeder circuit that forms meets load end (M
1), the one tunnel meets current-limiting resistance (R
5), (R
5) other end (C) point leads up to switch triode (T
1) meet load end (M
1), lead up to delay capacitor (C
1) meet load end (M
1), switch triode base stage and (R
3), (R
4) dividing point joins, (C) also with relay (J
2) coil one end joins (J
2) coil in addition-end (D) point one tunnel voltage-stabiliser tube (D through series connection
W2), resistance (R
6) meet load end (M
1), the one tunnel through (T
2), (T
3) compound transistor formed meets load end (M
1), the compound transistor base stage is connected on voltage-stabiliser tube (D
W2) and resistance R
6Tie point on, thermistor (R
T) and relay (J
1) coil tie point (A) is by current-limiting resistance (R
2), (R
1) and relay (J
2) normally opened contact (J
2-1) meet power input (N
1), relay (J
2) normally opened contact (J
2-1) a two ends normally open push button switch in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97248576 CN2310411Y (en) | 1997-11-14 | 1997-11-14 | Microsecond-level overvoltage protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97248576 CN2310411Y (en) | 1997-11-14 | 1997-11-14 | Microsecond-level overvoltage protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2310411Y true CN2310411Y (en) | 1999-03-10 |
Family
ID=33955723
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97248576 Expired - Fee Related CN2310411Y (en) | 1997-11-14 | 1997-11-14 | Microsecond-level overvoltage protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2310411Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100388587C (en) * | 2002-11-15 | 2008-05-14 | 中兴通讯股份有限公司 | Circuit for implementing online AC input high-voltage protection |
| CN109217255A (en) * | 2018-11-13 | 2019-01-15 | 柳州辰天科技有限责任公司 | The method and its relay power control module of goat phase failure protector relay power supply |
-
1997
- 1997-11-14 CN CN 97248576 patent/CN2310411Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100388587C (en) * | 2002-11-15 | 2008-05-14 | 中兴通讯股份有限公司 | Circuit for implementing online AC input high-voltage protection |
| CN109217255A (en) * | 2018-11-13 | 2019-01-15 | 柳州辰天科技有限责任公司 | The method and its relay power control module of goat phase failure protector relay power supply |
| CN109217255B (en) * | 2018-11-13 | 2023-09-01 | 柳州辰天科技有限责任公司 | Relay power supply method of phase failure protector of switch machine and relay power supply control module thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |