CN209215508U - AFGF finished-product testing machine - Google Patents
AFGF finished-product testing machine Download PDFInfo
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- CN209215508U CN209215508U CN201821608894.2U CN201821608894U CN209215508U CN 209215508 U CN209215508 U CN 209215508U CN 201821608894 U CN201821608894 U CN 201821608894U CN 209215508 U CN209215508 U CN 209215508U
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- isolating transformer
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Abstract
The utility model discloses and provides a kind of AFGF finished-product testing machine, it includes power supply, power switch, current-limiting resistance, change-over switch, AF/GF module, load switch and load, it further includes isolating transformer, the first winding and secondary winding turn ratio of the isolating transformer are 1:1, the current-limiting resistance is that a fixed resistance and an adjustable resistance are composed in series, the AF/GF module includes single-chip microcontroller, voltage and current measurement, relay board, peripheral components, it is to test in practical work process automatically, personnel's intervention is not needed, entire product is enclosed in test fixture, operator can not touch product, guarantee that operation safety is reliable.Leakage current is simulated with isolating transformer, is easy setting, electric current is stablized, and precision is high；Test equipment efficient quick will not cause really to leak electricity to the earth, guarantee the safety of the entire electricity consumption of factory.
Description
Technical field
The utility model relates to electronic and electrical equipment test industry, teaching experiment platform, more particularly to production in batch at
Product detection field.
Background technique
Safe and intelligent is all pursued in present life, household, factory electrical equipment be also required to safe and intelligent, smart grid
Other than over-voltage over-current protection, also there are anti-lightning strike protection, earth leakage protective etc..The electric appliances such as breaker, switch, plug, socket member
Part will do anti-lightning strike anti-leakage function, these electric elements have anti-lightning strike anti-leakage function, just must be tight in production and assembly
Lattice test anti-lightning strike anti-leakage function index, our AFGF finished-product testing machine tests this function, certainly we
Equipment there is basic over-voltage to test, cross the functions such as current test, also offer lightning stroke simulation test function, simulate leakage tests, electric leakage
Test this part we provide simulation leakage current electrostatic can achieve 0.01mA.AF is anti-lightning strike function, and GF is leakproof electric work
Energy.In electrical equipment use process, the principle of lightning stroke and drain conditions occurs it is well known that lightning stroke situation occurs for AF, GF occurs
Drain conditions, such schematic circuit cannot be used for carrying out functional test in product line certainly in practice, because of production line
More test equipments work at the same time, while leaking electricity to the earth, then the total leakage switch of factory is once testing tripping, entire workshop does not have
Method production.The test circuit of other simulation leakage functions is so had, the test circuit of existing traditional simulation leakage current is
Electric current asymmetry by limiting the firewire and zero curve that flow through device simulates leaky without to circuit test.It is such
The circuit of simulation leakage function is the leakage current value that needs are formed with resistance current limliting, circuit directly by access network voltage and
Builtin voltage fluctuation, the interference of the factors such as ripple, the leakage current value stability and low precision of simulation.It is leaked based on simulation above
The shortcomings that current circuit, it is proposed that using the method for isolating transformer, the voltage fluctuation of shielding wire road and ripple in this way
Interference.The Method And Principle and advantage of leakage current: front end input regulated power supply, active line are simulated with isolating transformer method
The fluctuation of road voltage and ripple, so that it may be isolated transformer isolation, because isolating transformer can store energy, play buffering
Effect, isolating transformer itself have reactance, are distributed capacitive reactance, impedance, can inhibit voltage fluctuation and the interference of ripple in this way, guarantee
The precision of the leakage current value of simulation, electric leakage flow control precision can achieve 0.01mA.
Utility model content
Technical problem to be solved in the utility model is overcome the deficiencies in the prior art, provides a kind of addition isolation transformation
Device, can be with the AFGF finished-product testing machine of batch detection product.
The technical scheme adopted by the utility model is a kind of AFGF finished-product testing machine, it include power supply, power switch,
Current-limiting resistance, change-over switch, AF/GF module 5, load switch and load, it further includes isolating transformer, the isolating transformer
The hot end of first winding connect the firewire of the power supply by a pole of the power switch, the isolating transformer it is primary
The cold end of winding connects the zero curve of the power supply, the first winding of the isolating transformer by another pole of the power switch
Cold end and secondary winding cold end connect and connect with the input N-terminal of the AF/GF module, the isolating transformer it is primary
The hot end of winding is connect with the end input H of the AF/GF module, described in the hot end connection of the secondary winding of the isolating transformer
One end of current-limiting resistance, the other end of the current-limiting resistance connect the input terminal of the change-over switch, and the two of the change-over switch
A output end is separately connected the end output H and the N-terminal of the AF/GF module, and the end output H of the AF/GF module and N-terminal lead to respectively
The two poles of the earth and the load for crossing the load switch connect.
The first winding and secondary winding turn ratio of the isolating transformer are 1:1.
The current-limiting resistance is that a fixed resistance and an adjustable resistance are composed in series.
The AF/GF module includes single-chip microcontroller, voltage and current measurement, relay board, peripheral components, in practical work process
It is to test automatically, does not need personnel's intervention, entire product is enclosed in test fixture, and operator can not touch product,
Any part for having electricity can not be touched, guarantees that operation safety is reliable.
The beneficial effects of the utility model are: it includes power supply, power switch, current-limiting resistance, turns due to the utility model
Switch, AF/GF module, load switch 6 and load are changed, it further includes isolating transformer, the first winding of the isolating transformer
It is 1:1 with secondary winding turn ratio, the current-limiting resistance is that a fixed resistance and an adjustable resistance are composed in series, described
AF/GF module includes single-chip microcontroller, voltage and current measurement, relay board, peripheral components, is to test in practical work process automatically,
Personnel's intervention is not needed, entire product is enclosed in test fixture, and operator can not touch product, it is also not possible to touch
Any part for having electricity guarantees that operation safety is reliable.So the utility model has the following beneficial effects:
1. simulating leakage current with isolating transformer, it is easy setting, electric current is stablized, and current value precision can guarantee
0.01mA；
2. test equipment efficient quick, reliable in test product electric leakage parameter safety, speed is fast, and it is really right to cause
The earth leaks electricity, and guarantees the safety of the entire electricity consumption of factory；
3. product is to test automatically during the test, does not need personnel and intervene, in test process, entire product closing
In test fixture, operator can not touch product, it is also not possible to touch any part for having electricity；Guarantee operation in this way
Securely and reliably；
4. compact-sized, light and handy, simple, maintenance is easy to operate；
5. complete machine long service life.
Detailed description of the invention
Fig. 1 is the utility model circuit principle structure schematic diagram.
Specific embodiment
As shown in Figure 1, the utility model it include power supply 1, power switch 2, current-limiting resistance 3, change-over switch 4, AF/GF mould
Block 5, load switch 6 and load 7, it further includes isolating transformer 8, and the hot end of the first winding of the isolating transformer 8 passes through
One pole of the power switch 2 connects the firewire of the power supply 1, and the cold end of the first winding of the isolating transformer 8 passes through institute
Another pole for stating power switch 2 connects the zero curve of the power supply 1, the cold end of the first winding of the isolating transformer 8 and secondary
The cold end of winding is connected and is connect with the input N-terminal of the AF/GF module 5, the hot end of the first winding of the isolating transformer 8
It is connect with the end input H of the AF/GF module 5, the hot end of the secondary winding of the isolating transformer 8 connects the current-limiting resistance
3 one end, the other end of the current-limiting resistance 3 connect the input terminal of the change-over switch 4, and two of the change-over switch 4 are defeated
Outlet is separately connected the end output H and the N-terminal of the AF/GF module 5, and the end output H of the AF/GF module 5 and N-terminal pass through respectively
The two poles of the earth of the load switch and the load connect.
The first winding and secondary winding turn ratio of the isolating transformer 8 are 1:1.
The current-limiting resistance 3 is that a fixed resistance and an adjustable resistance are composed in series.
The AF/GF module 5 includes single-chip microcontroller, voltage and current measurement, relay board, peripheral components, practical work process
In be to test automatically, do not need personnel's intervention, entire product is enclosed in test fixture, and operator can not touch product,
It is also impossible to touch any part for having electricity, guarantees that operation safety is reliable.
In the present embodiment, the power switch 2 controls power supply 1 and accesses, the load switch control load access, and described turn
It changes switch 4 and controls working condition, 3 current limliting of current-limiting resistance is in 5.85mA, load current 20A, the input of front end power supply 1 pressure stabilizing electricity
Source, the fluctuation of voltage and ripple on working line, so that it may the isolation of transformer 8 is isolated, because isolating transformer 8 can store energy
Amount plays buffer function, and isolating transformer 8 has reactance in itself, is distributed capacitive reactance, impedance, can inhibit voltage fluctuation and line in this way
The interference of wave guarantees that the precision of the leakage current value of simulation, electric leakage flow control precision can achieve 0.01mA.Fully meet batch
The demand of production test.
Claims (3)
1.AFGF finished-product testing machine, it includes power supply (1), power switch (2), current-limiting resistance (3), change-over switch (4), AF/GF
Module (5), load switch (6) and load (7), it is characterised in that: it further includes isolating transformer (8), the isolating transformer
(8) hot end of first winding connects the firewire of the power supply (1) by a pole of the power switch (2), and the isolation becomes
The cold end of the first winding of depressor (8) connects the zero curve of the power supply (1) by another pole of the power switch (2), described
The connection of the cold end of the cold end of the first winding of isolating transformer (8) and secondary winding and the input N with the AF/GF module (5)
End connection, the hot end of the first winding of the isolating transformer (8) is connect with the end input H of the AF/GF module (5), described
The hot end of the secondary winding of isolating transformer (8) connects one end of the current-limiting resistance (3), the current-limiting resistance (3) it is another
End connects the input terminal of the change-over switch (4), and two output ends of the change-over switch (4) are separately connected the AF/GF mould
The end output H of block (5) and N-terminal, the end output H of the AF/GF module (5) and N-terminal pass through the load switch (6) respectively
The two poles of the earth connect with the load (7).
2. AFGF finished-product testing machine according to claim 1, it is characterised in that: the isolating transformer (8) it is primary around
Group is 1:1 with secondary winding turn ratio.
3. AFGF finished-product testing machine according to claim 1, it is characterised in that: the current-limiting resistance (3) is a fixation
Resistance and an adjustable resistance are composed in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821608894.2U CN209215508U (en) | 2018-09-30 | 2018-09-30 | AFGF finished-product testing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821608894.2U CN209215508U (en) | 2018-09-30 | 2018-09-30 | AFGF finished-product testing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209215508U true CN209215508U (en) | 2019-08-06 |
Family
ID=67455226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821608894.2U Active CN209215508U (en) | 2018-09-30 | 2018-09-30 | AFGF finished-product testing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209215508U (en) |
-
2018
- 2018-09-30 CN CN201821608894.2U patent/CN209215508U/en active Active
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