Summary of the invention
In view of this, the invention provides a kind of overload protective device test unit, the performance to overload protective device that can simple and fast is tested.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of overload protective device test unit, comprising: power supply, controller, current transformer sum counter; Wherein:
Described power supply is electrically connected to overload protective device, gives described overload protective device power supply;
Described controller is electrically connected to described power supply, adjusts the output current of described power supply;
Described current transformer is electrically connected to described overload protective device, controller sum counter respectively, obtains the electric current that flows through described overload protective device, according to the electric current obtaining, carries out break-make, and make-and-break signal is fed back to described controller sum counter;
Described counter is electrically connected to described current transformer, according to the described make-and-break signal receiving, the break-make of described current transformer is counted.
Preferably, described device also comprises: well heater, heating radiator, thermopair, relay and temperature controller; Wherein:
Described relay is electrically connected to described well heater, controls described well heater work;
Described controller is electrically connected to described relay, controls the break-make of described relay;
Described thermopair is placed on described overload protective device, obtains the temperature of described overload protective device, and the temperature of obtaining is sent to connected described temperature controller;
Described temperature controller receives described temperature, when described temperature surpasses preset temperature, generate the first control signal, and described the first control signal is sent to connected described controller, described controller is controlled described relay according to described the first control signal receiving and is disconnected, and controls connected heating radiator work;
When described temperature is less than described preset temperature, described temperature controller generates the second control signal, and described the second control signal is sent to connected described controller, described controller is controlled described relay according to described the second control signal receiving and is communicated with, and controls connected heating radiator and quit work;
Described counter is connected with described relay, and the break-make of described relay is counted.
Preferably, described device also comprises: the timer being electrically connected to described controller;
In the time that described controller is set at described timer, work.
Preferably, described device also comprises: the alarm being connected with described controller;
After test completes, described controller is controlled described alarm equipment alarm.
From above-mentioned technical scheme, can find out; a kind of overload protective device test unit disclosed by the invention; by controller, control power supply to overload protective device output current; when flowing through the electric current of overload protective device and be greater than the working current of overload protective device; current transformer disconnects; in the process of test, by counter, the break-make number of times of current transformer is carried out to record, thereby realize the current test of crossing to overload protective device.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only a part of embodiment of the present invention, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the invention discloses a kind of overload protective device test unit, the performance to overload protective device that can simple and fast is tested.
As shown in Figure 1, a kind of overload protective device test unit, comprising: power supply 101, controller 102, current transformer 103 sum counters 104; Wherein:
Power supply 101 is electrically connected to overload protective device 100, gives overload protective device 100 power supplies;
Controller 102 is electrically connected to power supply 101, adjusts the output current of power supply 101;
Current transformer 103 is electrically connected to overload protective device 100, controller 102 sum counters 104 respectively, obtains the electric current that flows through overload protective device 100, according to the electric current obtaining, carries out break-make, and make-and-break signal is fed back to controller 102 sum counters 14;
Counter 104 is electrically connected to current transformer 103, according to the described make-and-break signal receiving, the break-make of current transformer 103 is counted.
Concrete; the course of work and the principle of the disclosed overload protective device test unit of above-described embodiment are: when needs carried out current test to overload protective device; by controller 102, control power supply 101, make power supply 101 to overload protective device 100 outputs, be greater than the electric current of overload protective device 100 working currents.When the electric current of the overload protective device 100 of flowing through is greater than the working current of overload protective device 100; the current transformer 103 being connected with overload protective device 100 disconnects; and by the signal feedback disconnecting to controller 102 sum counters 104; controller 102, according to the signal controlling power supply 101 receiving, makes power supply 101 to overload protective device 100 outputs, be less than the electric current of overload protective device 100 working currents.When the electric current of the overload protective device 100 of flowing through is less than the working current of overload protective device 100, the current transformer being connected with overload protective device 100 is connected, and connection signal is fed back to controller 102 sum counters 104.So repeat above-mentioned control procedure, until overload protective device 100 is lost protective effect.In above-mentioned control procedure, by the break-make number of times of counter 104 record current mutual inductors 103, thereby test out the conveyance capacity of overload protective device 100.
The invention also discloses a kind of overload protective device test unit, as shown in Figure 2, comprising: power supply 201, controller 202, current transformer 203, counter 204, well heater 205, heating radiator 206, thermopair 207, relay 208, temperature controller 209, timer 210 and alarm 211; Wherein:
Power supply 201 is electrically connected to overload protective device 200, gives overload protective device 200 power supplies;
Controller 202 is electrically connected to power supply 201, adjusts the output current of power supply 201;
Current transformer 203 is electrically connected to overload protective device 200, controller 202 sum counters 204 respectively, obtains the electric current that flows through overload protective device 200, according to the electric current obtaining, carries out break-make, and make-and-break signal is fed back to controller 202 sum counters 204;
Counter 204 is electrically connected to current transformer 203, according to the described make-and-break signal receiving, the break-make of current transformer 203 is counted;
Relay 208 is electrically connected to well heater 205, control heater 205 work;
Controller 202 is electrically connected to relay 208, the break-make of pilot relay 208;
Thermopair 207 is placed on overload protective device 200, obtains the temperature of overload protective device 200, and the temperature of obtaining is sent to connected temperature controller 209;
Temperature controller 209 receives described temperature, when described temperature surpasses preset temperature, generate the first control signal, and described the first control signal is sent to connected controller 202, controller 202 disconnects according to described the first control signal pilot relay 208 receiving, and controls connected heating radiator 206 work;
When described temperature is less than described preset temperature, temperature controller 209 generates the second control signal, and described the second control signal is sent to connected controller 202, controller 202 is communicated with according to described the second control signal pilot relay 208 receiving, and controls connected heating radiator 206 and quit work;
Counter 204 is connected with relay 208, and the break-make of relay 208 is counted;
Timer 210 is electrically connected to controller 202, in the time that controller 202 is set at timer 210, works;
Alarm 211 is electrically connected to controller 202, and after test completes, controller 202 is controlled alarm 211 and reported to the police.
Concrete, the course of work and the principle of the disclosed overload protective device test unit of above-described embodiment are: the disclosed overload protective device test unit of the present embodiment can either carry out current test to overload protective device, also can carry out overheated test to overload protective device.
When needs carried out current test to overload protective device, by controller 202, control power supply 201, make power supply 201 to overload protective device 200 outputs, be greater than the electric current of overload protective device 200 working currents.When the electric current of the overload protective device 200 of flowing through is greater than the working current of overload protective device 200; the current transformer 203 being connected with overload protective device 200 disconnects; and by the signal feedback disconnecting to controller 202 sum counters 204; controller 202, according to the signal controlling power supply 201 receiving, makes power supply 201 to overload protective device 200 outputs, be less than the electric current of overload protective device 200 working currents.When the electric current of the overload protective device 200 of flowing through is less than the working current of overload protective device 200, the current transformer being connected with overload protective device 200 is connected, and connection signal is fed back to controller 202 sum counters 204.So repeat above-mentioned control procedure, until overload protective device 200 is lost protective effect.In above-mentioned control procedure, by the break-make number of times of counter 204 record current mutual inductors 203, thereby test out the conveyance capacity of overload protective device 200.After test completes, controller 202 is controlled alarm 211 and is sent chimes of doom, and prompting test completes.At the above-mentioned overload protective device that carries out while crossing current test; can also set the test duration by timer 210; by counter 204, be recorded in the test duration of setting; the break-make number of times of current transformer 203, tests out the conveyance capacity of overload protective device 200 within the test duration of setting according to the data of counter 204 records.
When needs carry out overheated test to overload protective device, by 205 pairs of overload protective devices 200 of controller 202 control heater, heat.In the process of heating; the temperature gathering on overload protective device 200 by thermopair 207; and the temperature of collection is transferred to temperature controller 209; when the temperature on overload protective device 200 surpasses temperature controller 209 preset temperature; temperature controller 209 generates the first control signal; and the first control signal is sent to controller 202; controller 202 disconnects according to the first control signal pilot relay 208 receiving; well heater 205 quits work, and controls heating radiator 206 start working with Time Controller 202.When the temperature on overload protective device 200 is less than temperature controller 209 preset temperature; temperature controller 209 generates the second control signal; and the second control signal is sent to controller 202; controller 202 is communicated with according to the second control signal pilot relay 208 receiving, and controls connected heating radiator 206 and quit work.So repeat above-mentioned control procedure, until overload protective device 200 is lost protective effect.In above-mentioned control procedure, by the break-make number of times of counter 204 meter relays 208, thereby test out the conveyance capacity of overload protective device 200.After test completes, controller 202 is controlled alarm 211 and is sent chimes of doom, and prompting test completes.At the above-mentioned overload protective device that carries out while crossing current test; can also set the test duration by timer 210; by counter 204, be recorded in the test duration of setting; the break-make number of times of relay 208, tests out the conveyance capacity of overload protective device 200 within the test duration of setting according to the data of counter 204 records.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and each embodiment stresses is the difference with other embodiment, between each embodiment identical similar part mutually referring to.
Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the present invention.To the multiple modification of these embodiment, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.