CN219892940U - Three-phase power supply phase failure alarm system - Google Patents
Three-phase power supply phase failure alarm system Download PDFInfo
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- CN219892940U CN219892940U CN202321004929.2U CN202321004929U CN219892940U CN 219892940 U CN219892940 U CN 219892940U CN 202321004929 U CN202321004929 U CN 202321004929U CN 219892940 U CN219892940 U CN 219892940U
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Abstract
The utility model discloses a phase-failure alarm system of a three-phase power supply, which comprises a first relay K1, wherein a coil of the first relay K1 is connected between a phase live wire L1 and a zero line N of the three-phase power supply, a coil of a second relay K2 is connected between the phase live wire L2 and the zero line N of the three-phase power supply, and a coil of a third relay K3 is connected between the phase live wire L3 and the zero line N of the three-phase power supply. The advantages are that: when one phase of the three-phase power supply is in a power failure, the corresponding indicator lamp continuously flashes and shines, meanwhile, the electric bell HA alarms, and an operator on duty can timely find the fault; the switch S is disconnected, the electric bell HA stops alarming, and fault investigation is carried out; the circuit has simple structure, can solve the complex practical problem by using simple materials, and has low cost, strong operability and cost saving.
Description
Technical field:
the utility model relates to the technical field of power protection, in particular to a three-phase power phase-failure alarm system.
The background technology is as follows:
the existing phase-loss protector used by enterprises at present is usually an existing device purchased in the market, and has the advantages of high integration degree, high price, complete whole set replacement if damaged, high economic cost, and large purchase cost occupied by ordinary reserves.
The utility model comprises the following steps:
the utility model aims to provide a three-phase power supply open-phase alarm system which is simple in circuit structure and cost-saving.
The utility model is implemented by the following technical scheme: the three-phase power supply open-phase alarm system comprises a first relay K1, a second relay K2, a third relay K3, a first time relay KT1, a second time relay KT2, a first indicator lamp HL1, a second indicator lamp HL2 and a third indicator lamp HL3; the coil of the first relay K1 is connected between a phase live wire L1 and a zero line N of the three-phase power supply, the coil of the second relay K2 is connected between a phase live wire L2 and a zero line N of the three-phase power supply, and the coil of the third relay K3 is connected between a phase live wire L3 and a zero line N of the three-phase power supply; the normally open contact of the first relay K1, one of the normally closed contacts of the third relay K3, the normally open delay contact of the second time relay KT2 and the coil of the first time relay KT1 are connected in series between a phase live wire L1 and a zero wire N of a three-phase power supply; the normally open contact of the second relay K2, one of the normally closed contacts of the first relay K1, the normally closed delay contact of the first time relay KT1 and the coil of the second time relay KT2 are connected in series between a phase live wire L2 and a zero wire N of a three-phase power supply; the normally open contact of the third relay K3, one of the normally closed contacts of the second relay K2, the on-off contact of the first time relay KT1, the other normally closed contact of the first relay K1 and the first indicator lamp HL1 are connected in series between a phase live wire L3 and a zero line N of a three-phase power supply; the left end of the normally-open delay contact of the second time relay KT2, the left end of the normally-closed delay contact of the first time relay KT1 and the left end of the movable break contact of the first time relay KT1 are connected in series; the other normally-closed contact of the second relay K2, the second indicator lamp HL2 and the other normally-closed contact of the first relay K1 are connected in parallel, the first indicator lamp HL1 and the other normally-closed contact of the third relay K3, the third indicator lamp HL3 and the other normally-closed contact of the first relay K1 are connected in parallel.
Further, it also comprises an electric bell HA and a switch S; one end of the bell HA and one end of the switch S after being connected in series are connected with a zero line N of a three-phase power supply, and the other end of the bell HA and one end of the switch S are connected between one normally closed contact of the second relay K2 and the movable breaking contact of the first time relay KT 1.
The utility model has the advantages that: when one phase of the three-phase power supply is in a power failure, the corresponding indicator lamp continuously flashes and shines, meanwhile, the electric bell HA alarms, and an operator on duty can timely find the fault; the switch S is disconnected, the electric bell HA stops alarming, and fault investigation is carried out; the circuit has simple structure, can solve the complex practical problem by using simple materials, and has low cost, strong operability and cost saving.
Description of the drawings:
fig. 1 is a schematic structural view of the present utility model.
The components in the drawings are marked as follows: the electric bell comprises a first relay K1, a second relay K2, a third relay K3, a first time relay KT1, a second time relay KT2, a first indicator lamp HL1, a second indicator lamp HL2, a third indicator lamp HL3, an electric bell HA and a switch S.
The specific embodiment is as follows:
the following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1, the present embodiment provides a three-phase power supply open-phase alarm system, which includes a first relay K1, a second relay K2, a third relay K3, a first time relay KT1, a second time relay KT2, a first indicator lamp HL1, a second indicator lamp HL2, and a third indicator lamp HL3.
The coil of the first relay K1 is connected between a phase live wire L1 and a zero line N of the three-phase power supply, the coil of the second relay K2 is connected between a phase live wire L2 and a zero line N of the three-phase power supply, and the coil of the third relay K3 is connected between a phase live wire L3 and a zero line N of the three-phase power supply; the normally open contact of the first relay K1, one of the normally closed contacts of the third relay K3, the normally open time delay contact of the second time relay KT2 and the coil of the first time relay KT1 are connected in series between a phase live wire L1 and a zero wire N of the three-phase power supply; the normally open contact of the second relay K2, one of the normally closed contacts of the first relay K1, the normally closed delay contact of the first time relay KT1 and the coil of the second time relay KT2 are connected in series between a phase live wire L2 and a zero line N of the three-phase power supply; the normally open contact of the third relay K3, one of the normally closed contacts of the second relay K2, the movable breaking contact of the first time relay KT1, the other normally closed contact of the first relay K1 and the first indicator lamp HL1 are connected in series between a phase live wire L3 and a zero line N of the three-phase power supply; the left end of a normally open delay contact of the second time relay KT2, the left end of a normally closed delay contact of the first time relay KT1 and the left end of a movable break contact of the first time relay KT1 are connected in series; the other normally-closed contact of the second relay K2 and the second indicator lamp HL2 which are connected in series are connected in parallel with the other normally-closed contact of the first relay K1 and the first indicator lamp HL1, and the other normally-closed contact of the third relay K3 and the third indicator lamp HL3 which are connected in series are connected in parallel with the other normally-closed contact of the first relay K1 and the first indicator lamp HL 1.
It also comprises an electric bell HA and a switch S; one end of the bell HA and one end of the switch S which are connected in series are connected with a zero line N of the three-phase power supply, and the other end of the bell HA and the other end of the switch S are connected between one normally closed contact of the second relay K2 and a movable breaking contact of the first time relay KT 1.
When the switch S is closed and the three-phase power supply supplies power normally, the loop of the electric bell HA is in a cut-off state; when the three-phase power supply supplies power normally, coils of the first relay K1, the second relay K2 and the third relay K3 are all electrified, three normally open contacts corresponding to the coils are closed, and normally closed contacts corresponding to the coils are opened, so that loops of the first time relay KT1, the second time relay KT2, the first indicator lamp HL1, the second indicator lamp HL2 and the third indicator lamp HL3 are cut off; when an abnormal condition occurs due to the lack of electricity of a certain phase, taking the L1 phase lack of electricity of a three-phase power supply as an example, at the moment, the coil of the first relay K1 is in power failure, normally closed contacts of the first relay K1 are all restored to a closed state, the coil of the second time relay KT2 is powered on, the first indicator lamp HL1 is on, and the bell HA rings to give an alarm; after a period of time, the second time relay KT2 delays to reach a set time, a normally open delay contact of the second time relay KT2 delays to be closed, a coil of the first time relay KT1 is powered on, a movable breaking contact of the first time relay KT1 is instantaneously opened, a power supply of the first indicator lamp HL1 is cut off, and the first indicator lamp HL1 is extinguished; after a period of time, the first time relay KT1 delays to reach a set time, the normally closed delay contact of the first time relay KT1 is opened, so that the coil of the second time relay KT2 is released in a power-off mode, the normally open delay contact of the second time relay KT2 is opened, the coil of the first time relay KT1 is released in a power-off mode, the movable break contact of the first time relay KT1 is closed, and the first indicator lamp HL1 is lighted again; therefore, when the L1 phase of the three-phase power supply is in a shortage of electricity, the first indicator lamp HL1 can flash and lighten at intervals, meanwhile, the electric bell HA alarms, and an operator on duty can timely find the fault; the switch S is turned off, the electric bell HA stops alarming, and fault investigation is carried out. Similarly, when other phases L2 or L3 of the three-phase power supply lack of electricity, the corresponding second indicator lamp HL2 or third indicator lamp HL3 flashes, and meanwhile, the electric bell HA alarms; the utility model is specially designed for the situation that the three-phase power supply lacks one phase, has simple circuit structure, can solve the complex practical problem by using simple materials, has low cost and strong operability, and saves cost.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (2)
1. The three-phase power supply open-phase alarm system is characterized by comprising a first relay K1, a second relay K2, a third relay K3, a first time relay KT1, a second time relay KT2, a first indicator lamp HL1, a second indicator lamp HL2 and a third indicator lamp HL3;
the coil of the first relay K1 is connected between a phase live wire L1 and a zero line N of the three-phase power supply, the coil of the second relay K2 is connected between a phase live wire L2 and a zero line N of the three-phase power supply, and the coil of the third relay K3 is connected between a phase live wire L3 and a zero line N of the three-phase power supply;
the normally open contact of the first relay K1, one of the normally closed contacts of the third relay K3, the normally open delay contact of the second time relay KT2 and the coil of the first time relay KT1 are connected in series between a phase live wire L1 and a zero wire N of a three-phase power supply;
the normally open contact of the second relay K2, one of the normally closed contacts of the first relay K1, the normally closed delay contact of the first time relay KT1 and the coil of the second time relay KT2 are connected in series between a phase live wire L2 and a zero wire N of a three-phase power supply;
the normally open contact of the third relay K3, one of the normally closed contacts of the second relay K2, the on-off contact of the first time relay KT1, the other normally closed contact of the first relay K1 and the first indicator lamp HL1 are connected in series between a phase live wire L3 and a zero line N of a three-phase power supply; the left end of the normally-open delay contact of the second time relay KT2, the left end of the normally-closed delay contact of the first time relay KT1 and the left end of the movable break contact of the first time relay KT1 are connected in series;
the other normally-closed contact of the second relay K2, the second indicator lamp HL2 and the other normally-closed contact of the first relay K1 are connected in parallel, the first indicator lamp HL1 and the other normally-closed contact of the third relay K3, the third indicator lamp HL3 and the other normally-closed contact of the first relay K1 are connected in parallel.
2. The three-phase power loss-of-phase alarm system according to claim 1, further comprising an electric bell HA and a switch S; one end of the bell HA and one end of the switch S after being connected in series are connected with a zero line N of a three-phase power supply, and the other end of the bell HA and one end of the switch S are connected between one normally closed contact of the second relay K2 and the movable breaking contact of the first time relay KT 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321004929.2U CN219892940U (en) | 2023-04-27 | 2023-04-27 | Three-phase power supply phase failure alarm system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321004929.2U CN219892940U (en) | 2023-04-27 | 2023-04-27 | Three-phase power supply phase failure alarm system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219892940U true CN219892940U (en) | 2023-10-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321004929.2U Active CN219892940U (en) | 2023-04-27 | 2023-04-27 | Three-phase power supply phase failure alarm system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219892940U (en) |
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2023
- 2023-04-27 CN CN202321004929.2U patent/CN219892940U/en active Active
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