CN209327431U - A kind of device for demarcating short-circuit current value - Google Patents
A kind of device for demarcating short-circuit current value Download PDFInfo
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- CN209327431U CN209327431U CN201821922704.4U CN201821922704U CN209327431U CN 209327431 U CN209327431 U CN 209327431U CN 201821922704 U CN201821922704 U CN 201821922704U CN 209327431 U CN209327431 U CN 209327431U
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Abstract
The utility model discloses a kind of devices for demarcating short-circuit current value, 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 passage current when adjusting normal condition and passage current when short circuit; wherein, the power module, test sample, sampled measurements module and load blocks are successively contacted, and the utility model can be used to demarcate electrical current-limiting type protector cut-off current value.
Description
Technical field
The utility model relates to architectural electricity fireproofing technique fields, more particularly to a kind of dress for demarcating short-circuit current value
It sets.
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 be the current limliting speed of Microsecond grade again, how to demarcate protector starting short-circuit protection electric current at
One problem.Therefore, it is necessary to the current values that one kind can demarcate protector starting current-limiting protection.
Utility model content
In order to overcome the deficiencies of the above existing technologies, the utility model is designed to provide a kind of calibration short circuit current
The device of value, can be used to demarcate electrical current-limiting type protector cut-off current value.
In view of the above and other objects, the utility model proposes a kind of devices for demarcating short-circuit current value, 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 passage current when adjusting normal condition and passage current when short circuit,
Wherein, the power module, sample module, sampled measurements module and load blocks are successively contacted.
Preferably, the load blocks include the first adjustable noninductive resistive load RL1, the second adjustable noninductive resistive load
RL2 and delay switch K, the power module, the first adjustable noninductive resistive load RL1, sample module and sampled measurements module,
After the delay switch K and the second adjustable noninductive resistive load RL2 series connection and the first adjustable noninductive resistive load RL1 simultaneously
Connection.
Preferably, the described first adjustable noninductive resistive load RL1 includes multiple noninductive resistance RA1-RA15 and regulating switch
KA1-KA7。
Preferably, one end of the regulating switch KA1-KA7 is connected to form node R AH, the noninductive resistance RA1-RA15
One end be connected to form node R AL, the other end that the other end of regulating switch KA1 is connected to noninductive resistance RA1 forms a 1A
Current path, the electric current that the other end that the other end of regulating switch KA2 is connected to noninductive resistance RA2-RA3 forms a 2A is logical
Road, one end that the other end of regulating switch KA3 is connected to noninductive resistance RA4-RA5 form the current path of a 2A, and adjusting is opened
The other end that the other end of pass KA4 is connected to noninductive resistance RA6-RA10 forms the current path of a 5A, regulating switch KA5's
The other end that the other end is connected to noninductive resistance RA11 forms the current path of a 10A, the other end connection of regulating switch KA6
The current path of a 20A is formed to the other end of noninductive resistance RA12-RA13, the other end of regulating switch KA7 is connected to nothing
The other end of sensing resistor RA14-RA15 forms the current path of a 20A.
Preferably, the described first adjustable noninductive resistive load RL1 is obtained just by being closed different regulating switch KA1-KA7
Passage current impedance when normal state.
Preferably, the described second adjustable noninductive resistive load RL2 includes multiple noninductive resistance RB1-RB20 and regulating switch
KB1-KB5。
Preferably, one end of the regulating switch KB1-KB5 is connected to form node R BH, and the one of noninductive resistance RB1-RB20
End is connected to form node R BL, and the other end that the other end of regulating switch KB1 is connected to noninductive resistance RB1 forms the electricity of a 10A
Logical circulation road, the other end that the other end of regulating switch KB2 is connected to noninductive resistance RB2-RB3 form the current path of a 20A,
One end that the other end of regulating switch KB3 is connected to noninductive resistance RB4-RB5 forms the current path of a 20A, regulating switch
The other end that the other end of KB4 is connected to noninductive resistance RB6-RB10 forms the current path of a 50A, regulating switch KB5's
The other end that the other end is connected to noninductive resistance RB11-RB20 forms the current path of a 100A.
Preferably, passage current impedance when obtaining short circuit by being closed different regulating switch KB1-KB5.
Preferably, the power module includes an an alternating-current voltage source GR and single-pole single-throw switch (SPST) S.
Preferably, the power module includes that an alternating-current voltage source GR and double-pole double-throw switch.
Compared with prior art, a kind of device for demarcating short-circuit current value of the utility model may be implemented to demarcate electrical current limliting
The purpose of formula protector cut-off current value.
Detailed description of the invention
Fig. 1 is a kind of structure chart for the device for demarcating short-circuit current value of the utility model；
Fig. 2 is that the first adjustable noninductive resistive load RL1 and second is adjustable noninductive resistive in the utility model specific embodiment
Load the structure chart of RL2.
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 structure chart for the device for demarcating short-circuit current value of the utility model.As shown in Figure 1, the utility model
A kind of device for demarcating short-circuit current value, comprising: power module 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 for
Alternating voltage needed for measurement is provided；Sample module 20 is made of one or more sample TR, to be measured for generating in short circuit
Current limiting effect；Sampled measurements module 30 is by oscillograph CR and noninductive sample resistance R (0.001~0.1 Europe, 0.01 Europe of representative value)
Composition, for generated in short circuit one compared with normal condition have the pressure drop of notable difference with observe short circuit start to current-limiting protection when
Between；Load blocks 40 are by the first adjustable noninductive resistive load RL1, the second adjustable noninductive resistive load RL2 and delay switch K group
At for passage current when adjusting normal condition and passage current when short circuit, specifically, first is adjustable noninductive resistive negative
It carries RL1 to be made of multiple noninductive resistance RA1-RA15 and regulating switch KA1-KA7, for adjusting access electricity when normal condition
Stream, the second adjustable noninductive resistive load RL2 is made of multiple noninductive resistance RB1-RB20 and regulating switch KB1-KB5, for adjusting
Passage current when section short circuit.
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
It is adjustable noninductive resistive negative that end, the other end of noninductive sample resistance R and the sampling test pencil negative terminal of oscillograph CR are commonly connected to first
One end of one end RAH and delay switch K of RL1 are carried, it is adjustable noninductive resistive negative that the other end of delay switch K is connected to second
Carry one end RBH, the adjustable noninductive resistive load RL2 of other end RAL and second of the first adjustable noninductive resistive load RL1 of RL2
Other end RBL be connected after be connected to the zero curve of voltage source GR；
As shown in Fig. 2, one end of regulating switch KA1-KA7 is connected to form node R AH, one end of noninductive resistance RA1-RA15
It is connected to form node R AL, the other end that the other end of regulating switch KA1 is connected to noninductive resistance RA1 forms the electric current of a 1A
Access, the other end that the other end of regulating switch KA2 is connected to noninductive resistance RA2-RA3 form the current path of a 2A, adjust
One end that the other end of section switch KA3 is connected to noninductive resistance RA4-RA5 forms the current path of a 2A, regulating switch KA4
The other end be connected to noninductive resistance RA6-RA10 the other end formed a 5A current path, regulating switch KA5's is another
The other end that end is connected to noninductive resistance RA11 forms the current path of a 10A, and the other end of regulating switch KA6 is connected to nothing
The other end of sensing resistor RA12-RA13 forms the current path of a 20A, and the other end of regulating switch KA7 is connected to no electrification
The other end for hindering RA14-RA15 forms the current path of a 20A；It is obtained just by being closed different regulating switch KA1-KA7
Passage current impedance RL1 when normal state；
One end of regulating switch KB1-KB5 is connected to form node R BH, and one end of noninductive resistance RB1-RB20 is connected to form section
Point RBL, the other end that the other end of regulating switch KB1 is connected to noninductive resistance RB1 form the current path of a 10A, adjust
The other end that the other end of switch KB2 is connected to noninductive resistance RB2-RB3 forms the current path of a 20A, regulating switch KB3
The other end be connected to noninductive resistance RB4-RB5 one end formed a 20A current path, the other end of regulating switch KB4
The other end for being connected to noninductive resistance RB6-RB10 forms the current path of a 50A, regulating switch KB5 (double-point double-throw switch
Parallel connection is to guarantee current capacity) the other end be connected to noninductive resistance RB11-RB20 the other end formed a 100A electric current
Access；Passage current impedance RL2 when obtaining short circuit by being closed different regulating switch KB1-KB5.
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 device of the Calibrated current value includes 220V50HZ alternating-current voltage source, list
Monopole single throw switch S, sample TR, oscillograph CR, 0.01 noninductive sample resistance R, the first adjustable noninductive resistive load RL1, second can
Adjust noninductive resistive load RL2 and delay switch K.Wherein, voltage source, single-pole single-throw switch (SPST) S, sample TR, 0.01 noninductive sampling electricity
Resistance R, the first adjustable noninductive resistive load RL1 are connected in series, and oscillograph CR is in parallel with 0.01 noninductive sample resistance R, delay switch K with
After second adjustable noninductive resistive load RL2 series connection and the first adjustable noninductive resistive load RL1 is in parallel, and the utility model can be used to
Demarcate electrical current-limiting type protector cut-off current value.
The utility model principle is: the operating current before the adjustable short circuit of RL1, current range 1A-60A, when delay
When closing the switch, entire electric wiring forms simulation short-circuit condition, and short circuit current is adjusted jointly by RL1 and RL2, and adjustable range is
1A-260A, stepping scale is 1A, in order to avoid accident occurs in short-circuit process, control delay switch closing time is 100ms, oscillography
Device CR record short circuit occurs to complete the noninductive sample resistance R both end voltage waveform of overall process 0.01, protector to realization short circuit current limitation
The current value of current limiting action occurs and protector short circuit current limitation can be demarcated as in the current value that current limiting action does not occur for -1A scale
Current value.
As it can be seen that a kind of device for demarcating short-circuit current value of the utility model may be implemented to demarcate electrical current-limiting type protector limit
The purpose of galvanic electricity flow valuve.
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 (7)
1. a kind of device for demarcating short-circuit current value, which is characterized in that described device 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 passage current when adjusting normal condition and passage current when short circuit；
Wherein, the power module, sample module, sampled measurements module and load blocks are successively contacted；
The load blocks include the first adjustable noninductive resistive load RL1, the second adjustable noninductive resistive load RL2 and delay switch
After K, the delay switch K and the second adjustable noninductive resistive load RL2 series connection and the first adjustable noninductive resistive load RL1 simultaneously
Connection, the first adjustable noninductive resistive load RL1 includes multiple noninductive resistance RA1-RA15 and regulating switch KA1-KA7, described
One end of regulating switch KA1-KA7 is connected to form node R AH, and one end of the noninductive resistance RA1-RA15 is connected to form node
RAL, the other end that the other end of regulating switch KA1 is connected to noninductive resistance RA1 form the current path of a 1A, regulating switch
The other end that the other end of KA2 is connected to noninductive resistance RA2-RA3 forms the current path of a 2A, and regulating switch KA3's is another
One end that one end is connected to noninductive resistance RA4-RA5 forms the current path of a 2A, and the other end of regulating switch KA4 is connected to
The other end of noninductive resistance RA6-RA10 forms the current path of a 5A, and the other end of regulating switch KA5 is connected to no electrification
The other end for hindering RA11 forms the current path of a 10A, and the other end of regulating switch KA6 is connected to noninductive resistance RA12-
The other end of RA13 forms the current path of a 20A, and the other end of regulating switch KA7 is connected to noninductive resistance RA14-RA15
The other end formed a 20A current path.
2. a kind of device for demarcating short-circuit current value as described in claim 1, it is characterised in that: the first adjustable noninductive resistance
Property passage current impedance of load RL1 when obtaining normal conditions by being closed different regulating switch KA1-KA7.
3. a kind of device for demarcating short-circuit current value as claimed in claim 2, it is characterised in that: the second adjustable noninductive resistance
Property load RL2 include multiple noninductive resistance RB1-RB20 and regulating switch KB1-KB5.
4. a kind of device for demarcating short-circuit current value as claimed in claim 3, it is characterised in that: the regulating switch KB1-
One end of KB5 is connected to form node R BH, and one end of noninductive resistance RB1-RB20 is connected to form node R BL, regulating switch KB1's
The other end that the other end is connected to noninductive resistance RB1 forms the current path of a 10A, the other end connection of regulating switch KB2
The current path of a 20A is formed to the other end of noninductive resistance RB2-RB3, the other end of regulating switch KB3 is connected to noninductive
One end of resistance RB4-RB5 forms the current path of a 20A, and the other end of regulating switch KB4 is connected to noninductive resistance RB6-
The other end of RB10 forms the current path of a 50A, and the other end of regulating switch KB5 is connected to noninductive resistance RB11-RB20
The other end formed a 100A current path.
5. a kind of device for demarcating short-circuit current value as claimed in claim 4, it is characterised in that: by being closed different adjustings
Switch KB1-KB5 obtains passage current impedance when short circuit.
6. a kind of device for demarcating short-circuit current value as described in claim 1, it is characterised in that: the power module includes one
An alternating-current voltage source GR and single-pole single-throw switch (SPST) S.
7. a kind of device for demarcating short-circuit current value as described in claim 1, it is characterised in that: the power module includes one
Alternating-current voltage source GR and double-pole double-throw switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821922704.4U CN209327431U (en) | 2018-11-21 | 2018-11-21 | A kind of device for demarcating short-circuit current value |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821922704.4U CN209327431U (en) | 2018-11-21 | 2018-11-21 | A kind of device for demarcating short-circuit current value |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209327431U true CN209327431U (en) | 2019-08-30 |
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ID=67710995
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821922704.4U Active CN209327431U (en) | 2018-11-21 | 2018-11-21 | A kind of device for demarcating short-circuit current value |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209327431U (en) |
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2018
- 2018-11-21 CN CN201821922704.4U patent/CN209327431U/en active Active
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