CN209327483U - A kind of current limliting time test circuit of controllable short dot voltage-phase - Google Patents
A kind of current limliting time test circuit of controllable short dot voltage-phase Download PDFInfo
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- CN209327483U CN209327483U CN201821928203.7U CN201821928203U CN209327483U CN 209327483 U CN209327483 U CN 209327483U CN 201821928203 U CN201821928203 U CN 201821928203U CN 209327483 U CN209327483 U CN 209327483U
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Abstract
The utility model discloses a kind of current limliting time test circuits of controllable short dot voltage-phase, comprising: power module, for alternating voltage needed for providing measurement；Sample module, for generating current limiting effect to be measured in short circuit；Sampled measurements module has the pressure drop of notable difference compared with normal condition for generating one in short circuit to observe the short-circuit time started to current-limiting protection；Load blocks, for current adjustment when normal condition is provided access and provide short-circuit voltage phase point controllable current path, wherein, the power module, test sample, sampled measurements module and load blocks are successively contacted, it, can qualitative accurate test sample short circuit current current limliting time by the utility model.
Description
Technical field
The utility model relates to architectural electricity fireproofing technique fields, more particularly to a kind of controllable short dot voltage-phase
Current limliting time test circuit.
Background technique
Currently, a kind of new product, which occurs, in architectural electricity fire protection field is used for electric short circuit current limliting, this kind of product working environment
In short-circuit limit state, and it is the current limliting speed of Microsecond grade again, therefore high want is proposed to the test of product parameters
It asks, and the short circuit current waveform that the test macro of uncertain voltage-phase generates is multifarious, it has not been convenient to observational measurement, and it is short
Electric current infinity state in road easily generates impact failure to system.Therefore, it is badly in need of a kind of controllable short dot voltage-phase and short circuit
The current limliting time test system of current maxima.
Utility model content
In order to overcome the deficiencies of the above existing technologies, the utility model is designed to provide a kind of controllable short dot
The current limliting time test circuit of voltage-phase, with can qualitative accurate test sample short circuit current current limliting time.
In view of the above and other objects, the utility model proposes a kind of surveys of the current limliting time of controllable short dot voltage-phase
Try circuit, comprising:
Power module, for alternating voltage needed for providing measurement；
Sample module, for generating current limiting effect to be measured in short circuit；
Sampled measurements module has the pressure drop of notable difference to open to observe short circuit for generating one in short circuit compared with normal condition
Begin to the time of current-limiting protection；
Load blocks, for current adjustment when normal condition is provided access and to provide short-circuit voltage phase point controllable
Current path,
Wherein, the power module, test sample, sampled measurements module and load blocks are successively contacted.
Preferably, the load blocks include the first adjustable resistive load Z1, the second adjustable resistive load Z2 with synchronize open
K is closed, the first adjustable resistive load Z1 is used for the access of current adjustment when providing normal condition, the second adjustable resistive load
Z2 and synchronous switch K is used to provide short-circuit voltage phase point controllable current path, when for providing normal condition and short circuit
It is in parallel with the first adjustable resistive load z1 after current path, the synchronous switch and the second adjustable resistive load resistance z2 series connection
Preferably, the sampled measurements module is connected to one end and the synchronous switch of the described first adjustable resistive load Z1
One end of the first access of K, the other end of the first access of the synchronous switch K are connected to the one of the second adjustable resistive load Z2
End, the other end of the first adjustable resistive load Z1 and the other end of the second adjustable resistive load Z2 are connected to institute after being connected
State power module.
Preferably, the power module includes an an alternating-current voltage source GR and single-pole single-throw switch (SPST) S.
Preferably, the sample module includes one or more sample TR.
Preferably, the sampled measurements module includes an ammeter A, an oscillograph CR and noninductive sample resistance R, described
It connects after oscillograph CR is in parallel with noninductive sample resistance with ammeter A.
Preferably, the firewire of the alternating-current voltage source GR is connected to one end of the single-pole single-throw switch (SPST) S, the hilted broadsword list
The other end of throw switch S is connected to the end of incoming cables of sample TR, and the leading-out terminal of sample TR is connected to the one of the noninductive sample resistance R
The sampling test pencil anode at end and oscillograph CR, the other end of the noninductive sample resistance R and the sampling test pencil negative terminal of oscillograph CR
It is commonly connected to one end of one end of the first adjustable resistive load Z1 and the first access of synchronous switch K, the of synchronous switch K
The other end of one access is connected to one end of the second adjustable resistive load Z2, the other end of the first adjustable resistive load Z1 and
The other end of two adjustable resistive load Z2 is connected to the zero curve of voltage source GR, the sampling pincer iron core of the ammeter A after being connected
It covers between the leading-out terminal of sample TR and the line of noninductive sample resistance R, the both ends of the alternate path of the synchronous switch K are connected to
Timing triggering 1 and timing triggering 2, the control terminal of the synchronous switch K connect voltage-phase detection module.
Preferably, the noninductive sample resistance R value is 0.001~0.1 Europe.
Preferably, the power module includes that an alternating-current voltage source GR and double-pole double-throw switch.
Preferably, the double-point double-throw switch controls the firewire and zero curve or two phase lines of the alternating-current voltage source GR simultaneously
To ensure safety.
Compared with prior art, a kind of current limliting time test circuit of controllable short dot voltage-phase of the utility model can
It, can qualitative accurate test sample short circuit current current limliting time to carry out short-circuit test on controllable voltage-phase point.
Detailed description of the invention
Fig. 1 is a kind of circuit structure of the current limliting time test circuit of controllable short dot voltage-phase of the utility model
Figure.
Specific embodiment
Below by way of specific specific example and the embodiments of the present invention is described with reference to the drawings, those skilled in the art
Member can be understood easily the further advantage and effect of the utility model by content disclosed in the present specification.The utility model also may be used
It is implemented or is applied by other different specific examples, the various details in this specification can also be based on different viewpoints and answer
With, carried out under the spirit without departing substantially from the utility model it is various modification and change.
Fig. 1 is a kind of circuit structure of the current limliting time test circuit of controllable short dot voltage-phase of the utility model
Figure.As shown in Figure 1, a kind of current limliting time test circuit of controllable short dot voltage-phase of the utility model, including power supply mould
Block 10, sample module 20, sampled measurements module 30 and load blocks 40.
Wherein, power module 10 is made of alternating-current voltage source GR (220V/380V 50HZ) and single-pole single-throw switch (SPST) S, is used
The alternating voltage needed for measurement is provided；Sample module 20 is made of one or more sample TR, in short circuit generate to
Survey current limiting effect；Sampled measurements module 30 is by ammeter A, oscillograph CR and noninductive sample resistance R (0.001~0.1 Europe, typical case
0.01 Europe of value) composition, there is the pressure drop of notable difference to start to observe short circuit to limit compared with normal condition for generating one in short circuit
Flow the time of protection；Load blocks 40 are (double by the first adjustable resistive load Z1, the second adjustable resistive load Z2 and synchronous switch K
Dpdt double-pole double-throw (DPDT) relay) and voltage-phase detection module (not shown) composition, the first adjustable resistive load Z1 is for providing normally
The access of current adjustment when state, while the second adjustable resistive load Z2 and synchronous switch K is for providing short-circuit voltage phase
The controllable current path of point.
When measurement, power module 10, test sample 20, sampled measurements module 30 and load blocks 40 are successively contacted, specifically
For, the firewire of alternating-current voltage source GR is connected to one end of single-pole single-throw switch (SPST) S, and the other end of single-pole single-throw switch (SPST) S is connected to
The end of incoming cables of sample TR, the leading-out terminal of sample TR be connected to noninductive sample resistance R one end and oscillograph CR sampling test pencil just
End, the other end of noninductive sample resistance R and the sampling test pencil negative terminal of oscillograph CR are commonly connected to the first adjustable resistive load Z1
One end and synchronous switch K the first access one end, the other end of the first access of synchronous switch K is connected to second can
Adjust one end of resistive load Z2, the other end phase of the other end of the first adjustable resistive load Z1 and the second adjustable resistive load Z2
The zero curve of voltage source GR is connected to after even, ammeter A is generally pincerlike meter, samples pincerlike iron core sleeve in the leading-out terminal of sample TR
Between the line of noninductive sample resistance R, the both ends of the alternate path of synchronous switch K are connected to timing triggering 1 and timing triggering 2,
The control terminal of synchronous switch K connects voltage-phase detection module (not shown).
Preferably, single-pole single-throw switch (SPST) S can control the firewire and zero curve of voltage source GR simultaneously using double-point double-throw switch
(or two phase lines) to ensure safety；
In the utility model specific embodiment, the current limliting time test circuit of the controllable short dot voltage-phase
220V50HZ alternating-current voltage source TR, single-pole single-throw switch (SPST) S, sample TR, ammeter A, oscillograph CR, adjustable resistive load z1, can
Adjust resistive load Z2 and synchronous switch K.Wherein, voltage source, single-pole single-throw switch (SPST), sample, ammeter, 0.01 noninductive sampling electricity
Resistance, resistive load are connected in series, and oscillograph is in parallel with 0.01 noninductive sample resistance, synchronous switch and adjustable resistive load resistance z2 string
It is in parallel with adjustable resistive load z1 after connection.
The utility model principle is: firstly, initial current when the first controllable resistive load Z1 adjusts short circuit generation is adjusted,
Maximum short circuit current when the second controllable resistive load Z2 adjusts short circuit generation is adjusted, synchronous switch K is instructed according to sprocket pulse
It is closed in the particular phases point of alternating voltage, entire electric wiring forms short-circuit condition, and sample TR occurs short circuit current limitation movement, shows
Wave device CR record short circuit occurs to the voltage waveform realized in short circuit current limitation completion overall process at the both ends noninductive sample resistance R, short
Voltage may be defined as from 5% time that normal voltage waveform peak point drops to normal voltage waveform peak when the current limliting of road
At the current limliting time.
As it can be seen that a kind of current limliting time test circuit of controllable short dot voltage-phase of the utility model can be controllable
Voltage-phase point on carry out short-circuit test, can qualitative accurate test sample short circuit current current limliting time.
The above embodiments are only illustrative of the principle and efficacy of the utility model, and not for limitation, this is practical new
Type.Anyone skilled in the art can repair above-described embodiment under the spirit and scope without prejudice to the utility model
Decorations and change.Therefore, the rights protection scope of the utility model, should be as listed in the claims.
Claims (8)
1. a kind of current limliting time test circuit of controllable short dot voltage-phase, which is characterized in that the circuit includes:
Power module, for alternating voltage needed for providing measurement；
Sample module, for generating current limiting effect to be measured in short circuit；
Sampled measurements module, for generated in short circuit one compared with normal condition have the pressure drop of notable difference with observe short circuit start to
The time of current-limiting protection；
Load blocks, for current adjustment when normal condition is provided access and provide short-circuit voltage phase point controllable electricity
Logical circulation road,
Wherein, the power module, test sample, sampled measurements module and load blocks are successively contacted；
The load blocks include the first adjustable resistive load Z1, the second adjustable resistive load Z2 and synchronous switch K, and described first
Adjustable resistive load Z1 is used for the access of current adjustment when providing normal condition, the second adjustable resistive load Z2 and synchronous switch
K is described for providing current path when normal condition and short circuit for providing short-circuit voltage phase point controllable current path
It is in parallel with the first adjustable resistive load z1 after synchronous switch and the second adjustable resistive load resistance z2 series connection；
The sampled measurements module is connected to one end of the described first adjustable resistive load Z1 and the first access of synchronous switch K
One end, the other end of the first access of the synchronous switch K is connected to one end of the second adjustable resistive load Z2, described first
The other end of the other end of adjustable resistive load Z1 and the second adjustable resistive load Z2 are connected to the power module after being connected.
2. a kind of current limliting time test circuit of controllable short dot voltage-phase as described in claim 1, it is characterised in that:
The power module includes an an alternating-current voltage source GR and single-pole single-throw switch (SPST) S.
3. a kind of current limliting time test circuit of controllable short dot voltage-phase as claimed in claim 2, it is characterised in that:
The sample module includes one or more sample TR.
4. a kind of current limliting time test circuit of controllable short dot voltage-phase as claimed in claim 3, it is characterised in that:
The sampled measurements module includes an ammeter A, an oscillograph CR and noninductive sample resistance R, and the oscillograph CR takes with noninductive
It connects after sample resistor coupled in parallel with ammeter A.
5. a kind of current limliting time test circuit of controllable short dot voltage-phase as claimed in claim 4, it is characterised in that:
The firewire of the alternating-current voltage source GR is connected to one end of the single-pole single-throw switch (SPST) S, the other end of the single-pole single-throw switch (SPST) S
It is connected to the end of incoming cables of sample TR, the leading-out terminal of sample TR is connected to one end and the oscillograph CR of the noninductive sample resistance R
Test pencil anode is sampled, the other end of the noninductive sample resistance R and the sampling test pencil negative terminal of oscillograph CR are commonly connected to first
One end of first access of one end and synchronous switch K of adjustable resistive load Z1, the other end of the first access of synchronous switch K
It is connected to one end of the second adjustable resistive load Z2, the other end and the second adjustable resistive load of the first adjustable resistive load Z1
The other end of Z2 is connected to the zero curve of voltage source GR, the pincerlike iron core sleeve of the sampling of the ammeter A going out in sample TR after being connected
Between line end and the line of noninductive sample resistance R, the both ends of the alternate path of the synchronous switch K are connected to timing triggering 1 and meter
When trigger 2, the control terminal of the synchronous switch K connects voltage-phase detection module.
6. a kind of current limliting time test circuit of controllable short dot voltage-phase as claimed in claim 5, it is characterised in that:
The noninductive sample resistance R value is 0.001~0.1 Europe.
7. a kind of current limliting time test circuit of controllable short dot voltage-phase as described in claim 1, it is characterised in that:
The power module includes that an alternating-current voltage source GR and double-pole double-throw switch.
8. a kind of current limliting time test circuit of controllable short dot voltage-phase as claimed in claim 7, it is characterised in that:
The firewire and zero curve or two phase lines that the double-point double-throw switch controls the alternating-current voltage source GR simultaneously are to ensure safety.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821928203.7U CN209327483U (en) | 2018-11-21 | 2018-11-21 | A kind of current limliting time test circuit of controllable short dot voltage-phase |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821928203.7U CN209327483U (en) | 2018-11-21 | 2018-11-21 | A kind of current limliting time test circuit of controllable short dot voltage-phase |
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| Publication Number | Publication Date |
|---|---|
| CN209327483U true CN209327483U (en) | 2019-08-30 |
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ID=67711093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821928203.7U Active CN209327483U (en) | 2018-11-21 | 2018-11-21 | A kind of current limliting time test circuit of controllable short dot voltage-phase |
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| Country | Link |
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| CN (1) | CN209327483U (en) |
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2018
- 2018-11-21 CN CN201821928203.7U patent/CN209327483U/en active Active
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