CN207924113U - A kind of three phase mains electric detection system - Google Patents

Abstract

The utility model discloses a kind of three phase mains electric detection systems, lack detection circuit and circuit of testing the phase sequence, three input terminals of three phase mains electric detection system are separately connected three phase mains, and lack detection circuit includes the first phase shortage circuit, the second phase shortage circuit and third phase shortage circuit；It includes first resistor and the first light emitting diode that first phase shortage circuit, which connects A phases and B phases, the first phase shortage circuit,；It includes second resistance and the second light emitting diode that second phase shortage circuit, which connects B phases and C phases, the second phase shortage circuit,；It includes 3rd resistor, third light emitting diode and the 4th light emitting diode that third phase shortage circuit, which connects C phases and A phases, third phase shortage circuit,；Circuit of testing the phase sequence includes the first capacitance, the second capacitance, third capacitance, the first LED light and the second LED light；The utility model is simple in structure, easy to use, display is clear.

Description

A kind of three phase mains electric detection system

Technical field

The utility model is related to three phase mains detection technique field, specially a kind of three phase mains electric detection system.

Background technology

With urban development, everywhere place all applies various electric appliances, and in industry spot, contactor, motor are most often The electrical equipment seen many times needs verifying power supply phase sequence, and detect contact during repairing these electrical equipments The phenomenon that device, motor whether there is phase-deficient operation.When maintenance personal carries out above-mentioned verification and detection work usually rule of thumb or Multimeter measurement result is judged that the time for detecting cost is longer, sometimes can also because detect it is improper caused by equipment damage；Together When detection device volume it is often larger, largely it is also required to provide power supply, make troubles to maintenance personal.

Utility model content

The purpose of this utility model overcome the deficiencies of the prior art and provide it is a kind of it is simple in structure, easy to use, display is clear A kind of three phase mains electric detection system, solve the problems of the prior art.

To achieve the above object, the utility model provides the following technical solutions：A kind of three phase mains electric detection system, packet Lack detection circuit and circuit of testing the phase sequence are included, three input terminals of the three phase mains electric detection system are separately connected three-phase Power supply, lack detection circuit include the first phase shortage circuit, the second phase shortage circuit and third phase shortage circuit；The first phase shortage circuit A phases and B phases are connected, the first phase shortage circuit includes first resistor and the first light emitting diode, and the anode of the first light emitting diode connects It connects first resistor and connects B phases with cathode, first resistor upper end connects A phases；The second phase shortage circuit connection B phases and C phases, second Phase shortage circuit includes second resistance and the second light emitting diode, and the cathode connection second resistance and anode of the second light emitting diode connect C phases are connect, second resistance upper end connects B phases；The third phase shortage circuit connection C phases and A phases, third phase shortage circuit include third electricity The anode connection 3rd resistor of resistance, third light emitting diode and the 4th light emitting diode, third light emitting diode is connected with cathode Phase, the 4th light emitting diode is in parallel with third light emitting diode and anode and cathode direction is on the contrary, 3rd resistor lower end connect C Phase；The circuit of testing the phase sequence includes the first capacitance, the second capacitance, third capacitance, the first LED light and the second LED light, the first electricity Hold the line input for being located at and being connected with A, the second capacitance is located at the line input being connected with B, connects behind the second capacitance Connecing the second LED light, third capacitance is located at the line input being connected with C, connects the first LED light behind third capacitance, and first LED light right end circuit, the second LED light left end circuit and the first capacitance right end connection form intersection point circuit together.

Preferably, the first LED light and the second LED light of a kind of three phase mains electric detection system are the LED of 380V Lamp.

Part is not directed in the device to be the same as those in the prior art or can be realized by using the prior art.

Compared with prior art, the beneficial effects of the utility model are as follows：A kind of three phase mains electric detection system, three-phase The triple line of power supply is respectively connected to the three-phase input end of this system, judges three by observing light emitting diode and LED light state Phase power supply whether phase shortage and phase order relation, easy to use, detection is simple；The utility model is simple in structure, easy to use, display is clear It is clear.

Description of the drawings

Fig. 1 is a kind of three phase mains electric detection system circuit diagram.

Specific implementation mode

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that described embodiment only the utility model a part of the embodiment, without whole implementation Example, is based on the embodiments of the present invention, and those of ordinary skill in the art are obtained without making creative work The every other embodiment obtained, shall fall within the protection scope of the present invention.

In the description of the present invention, it is understood that, term "upper", "lower", "front", "rear", "left", "right", The orientation or positional relationship of the instructions such as "top", "bottom", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, only It is described convenient for description the utility model and simplifying, without indicating or implying that signified device or element must have specific side Position, with specific azimuth configuration and operation, therefore should not be understood as limiting the present invention.

Embodiment：A kind of three phase mains electric detection system, including lack detection circuit and circuit of testing the phase sequence, three-phase electricity Three input terminals of source electric detection system are separately connected three phase mains, and lack detection circuit includes the first phase shortage circuit, second Phase shortage circuit and third phase shortage circuit, the first phase shortage circuit connect A phases and B phases, the first phase shortage circuit include first resistor R1 and The anode connection first resistor R1 of first light emitting diode T1, the first light emitting diode T1 connects B phases, first resistor R1 with cathode Upper end connects A phases；It includes second resistance R2 and the second light-emitting diodes that second phase shortage circuit, which connects B phases and C phases, the second phase shortage circuit, The cathode connection second resistance R2 of pipe T2, the second light emitting diode T2 connect C phases with anode, and the upper ends second resistance R2 connect B phases； Third phase shortage circuit connects C phases and A phases, and third phase shortage circuit includes 3rd resistor R3, third light emitting diode T3 and the 4th hair The anode connection 3rd resistor R3 of optical diode T4, third light emitting diode T3 connect A phases, the 4th light emitting diode T4 with cathode The in parallel and anode and cathode direction with third light emitting diode T3 is on the contrary, the lower ends 3rd resistor R3 connect C phases, when first luminous two When pole pipe T1, the second light emitting diode T2, third light emitting diode T3 and the 4th light emitting diode T4 are lighted simultaneously, illustrate three-phase Power supply is without phase shortage, and when A phase phase shortages, only the second light emitting diode T2 is bright, when B phase phase shortages, third light emitting diode T3 and 4th light emitting diode T4 is bright, and when C phase phase shortages, only the first light emitting diode T1 is bright；Circuit of testing the phase sequence includes the first capacitance C1, the second capacitance C2, third capacitance C3, the first LED light L1 and the second LED light L2, the first LED light L1 and the second LED light L2 are The LED light of 380V, the first capacitance C1 are located at the line input being connected with A, and the second capacitance C2 is located at the circuit being connected with B Input terminal, the second LED light L2 is connected behind the second capacitance C2, and third capacitance C3 is located at the line input being connected with C, third The first LED light L1, the first LED light L1 right ends circuit, the second LED light L2 left ends circuit and the first capacitance C1 is connected behind capacitance C3 Right end connection forms intersection point circuit together, it is assumed that the impedance of two LED light is identical with the capacitive reactance of capacitance, according to kirchhoff Theorem, observation LED light light levels judge phase sequence, brighter for B sequences, and dark for C sequences, another is A sequences.

In summary：A kind of three phase mains electric detection system, the triple line of three phase mains are respectively connected to the three of this system Phase input terminal, by observe light emitting diode and LED light state judge three phase mains whether phase shortage and phase order relation, conveniently make With detection is simple；The utility model is simple in structure, easy to use, display is clear.

The advantages of basic principles and main features and the utility model of the utility model have been shown and described above, one's own profession The technical staff of industry is described in the above embodiment and specification it should be appreciated that the utility model is not limited by above-mentioned implementation 1 Only illustrate the principles of the present invention, on the premise of not departing from the spirit and scope of the utility model, the utility model also has Various changes and modifications, these various changes and improvements fall within the scope of the claimed invention, the requires of the utility model Protection domain is defined by the appending claims and its equivalent thereof.

Claims (2)

1. a kind of three phase mains electric detection system, it is characterised in that：A kind of three phase mains electric detection system, including phase shortage inspection Slowdown monitoring circuit and circuit of testing the phase sequence；Three input terminals of the three phase mains electric detection system are separately connected three phase mains, lack Phase detecting circuit includes the first phase shortage circuit, the second phase shortage circuit and third phase shortage circuit；The first phase shortage circuit connects A phases With B phases, the first phase shortage circuit includes first resistor and the first light emitting diode, the first electricity of anode connection of the first light emitting diode Resistance connects B phases with cathode, and first resistor upper end connects A phases；The second phase shortage circuit connection B phases and C phases, the second phase shortage circuit Including second resistance and the second light emitting diode, the cathode connection second resistance of the second light emitting diode connects C phases with anode, the Two resistance upper ends connect B phases；The third phase shortage circuit connection C phases and A phases, third phase shortage circuit include 3rd resistor, third The anode connection 3rd resistor of light emitting diode and the 4th light emitting diode, third light emitting diode connects phase with cathode, and the 4th Light emitting diode is in parallel with third light emitting diode and anode and cathode direction is on the contrary, 3rd resistor lower end connect C phases；The phase Sequence testing circuit includes the first capacitance, the second capacitance, third capacitance, the first LED light and the second LED light, and the first capacitance is located at and A The line input being connected, the second capacitance are located at the line input being connected with B, the 2nd LED are connected behind the second capacitance Lamp, third capacitance are located at the line input being connected with C, the first LED light, the first LED light right end are connected behind third capacitance Circuit, the second LED light left end circuit and the first capacitance right end connection form intersection point circuit together.

2. a kind of three phase mains electric detection system according to claim 1, it is characterised in that：First LED light and Second LED light is the LED light of 380V.