CN202014078U

CN202014078U - Power-failure and open-phase alarm for three-phase power supply

Info

Publication number: CN202014078U
Application number: CN2011200607478U
Authority: CN
Inventors: 黄涛; 黄河; 黄山; 谭怡男
Original assignee: LIAONING MEDICAL UNIVERSITY
Current assignee: LIAONING MEDICAL UNIVERSITY
Priority date: 2011-03-10
Filing date: 2011-03-10
Publication date: 2011-10-19
Anticipated expiration: 2021-03-10

Abstract

The utility model discloses a power-failure and open-phase alarm for a three-phase power supply, and the power-failure and open-phase alarm for the three-phase power supply solves the problems of complex structure, high cost, incapability of judging power failure and open phase and the open-phase phase and inconvenience of overhauling in the existing power-failure and open-phase alarm for the three-phase power supply. The power-failure and open-phase alarm comprises an alarming branch and a controlling branch, wherein the alarming branch consists of a DC (direct current) power supply, a power supply switch, three normally closed contacts of a relay connected in parallel and a buzzer; the alarm is characterized in that the controlling branch is composed of an AC (alternating current) relay respectively connected between phases of A, B and C as well as a zero line, normally open contacts of the AC relay respectively connected between the phases of A, B and C as well as the zero line in series, a current-limiting resistor and a light emitting diode. The power-failure and open-phase alarm can be used for alarming when power failure and open phase for the three-phase power supply occur in a farm, a hatching room, a brooding room and other places.

Description

Three phase mains power failure phase failure alarm

Technical field

The utility model relates to a kind of three phase mains power failure phase failure alarm that uses in places such as plant, hatching house, the chambers of brooding.

Background technology

In plant, hatching house, brood chamber and other important place of using three phase mains, for productive life needs, must guarantee in time to notify the staff after continual power supply or the power failure, it is known have a power failure, and take appropriate measures (as generating, stop that machinery equipment turns round, windows, insulation etc.).Existing three phase mains power failure phase failure alarm complex structure, the cost height is reported to the police in the time of can only or having a power failure in phase shortage, and can not judge has a power failure still is phase shortage and which phase phase shortage, makes troubles to staff's maintenance, can not in time take measures.

Summary of the invention

The utility model will solve the complex structure that existing three phase mains has a power failure, phase failure alarm exists, the cost height, and can not judge has a power failure still is phase shortage and which phase phase shortage, and the problem that is not easy to overhaul provides a kind of three phase mains power failure phase failure alarm.

The three phase mains power failure phase failure alarm that the utility model relates to, comprise warning branch road and control branch road, described warning branch road is made up of the relay normally-closed contact and the buzzer of DC power supply, mains switch, three parallel connections, and its special character is: described control prop up route be connected on respectively A, B, C mutually and the AC relay between the zero line and be connected on respectively A, B, C mutually and the AC relay normally opened contact between the zero line, current-limiting resistance and light-emitting diode form.

In the three phase mains that use in places such as the utility model can be applicable to plant, hatching house, the chamber of brooding, owing in the control branch road, adopted AC relay, thus simplify circuit structure, reduce cost.Adopt relay normally open contact, current-limiting resistance and the light-emitting diode of series connection in the control branch road, three light-emitting diodes all extinguish the indication that has a power failure when having a power failure; When phase shortage, light-emitting diode that should phase is extinguished, carries out the phase shortage indication, make the staff can in time learn any phase phase shortage and take corresponding measure, thus convenient maintenance increase work efficiency, reduce because have a power failure, economic loss that phase shortage causes.

Description of drawings

Fig. 1 circuit theory diagrams of the present utility model.

Among the figure: GB-DC power supply, JA-AC relay, JB-AC relay, the JC-AC relay, JA1-AC relay normally opened contact, JB1-AC relay normally opened contact, JC1-AC relay normally opened contact, JA2-AC relay normally-closed contact, JB2-AC relay normally-closed contact, JC2-AC relay normally-closed contact, RA, RB, | the RC--current-limiting resistance, DA, DB, DC-light-emitting diode, HA-buzzer, K-mains switch.

Embodiment

As shown in the figure, the three phase mains power failure phase failure alarm that the utility model relates to comprises warning branch road and control branch road; Described control is propped up route and is connected on A, B, C respectively mutually and AC relay JA, JB, JC between the zero line O, be connected on respectively A, B, C mutually and AC relay normally opened contact JA1, JB1, JC1 and current-limiting resistance RA, RB, RC and light-emitting diode DA, DB between the zero line O, DC form.Described warning branch road is by DC power supply GB(9V dc-battery), mains switch K, form by AC relay JA, JB, JC control and three AC relay normally-closed contact JA2, JB2, JC2 and buzzer HA in parallel respectively.The 9V dc-battery adopts buckle type to install, and AC relay JA, JB, JC adopt female type to install, to be convenient for changing dc-battery and AC relay.

During work, the power turn-on K switch, after three phase mains is given electricity, AC relay JA, JB, JC coil get, AC relay normally open contact JA1, JB1, JC1 are closed respectively, make light-emitting diode DA, DB, DC luminous respectively, and AC relay normally closed interlock JA2, JB2, JC2 disconnect, at this moment alarm is in the monitoring state.

When three phase mains has a power failure, AC relay JA, JB, JC coil blackout, AC relay normally opened contact JA1, JB1, JC1 disconnect, light-emitting diode DA, DB, DC extinguish, AC relay normally-closed contact JA2, JB2, JC2 connect, and buzzer HA sends alarm signal, notifies the staff.

When phase shortage takes place when, be example with A phase power supply phase shortage, AC relay JA outage, AC relay normally opened contact JA1 disconnects, and light-emitting diode DA extinguishes, indication A phase power supply phase shortage; AC relay normally closed interlock JA2 connects simultaneously, and buzzer HA sends alarm signal, notifies the staff in time to check this phase phase shortage reason.

After alarm signal occurring, in time disconnecting power switch K makes buzzer HA stop to report to the police, and avoids the electric weight of DC power supply GB to exhaust.In actual use, can be regularly the DC power supply GB of alarm be checked, promptly disconnect three phase mains, see whether buzzer HA can send loud chimes of doom, if sound is less or noiseless, then need to change battery, having a power failure or can operate as normal during phase shortage to guarantee buzzer HA.

Claims

1. three phase mains power failure phase failure alarm, comprise warning branch road and control branch road, described warning branch road is made up of the relay normally-closed contact and the buzzer of DC power supply, mains switch, three parallel connections, it is characterized in that: described control prop up route be connected on respectively A, B, C mutually and the AC relay between the zero line and be connected on respectively A, B, C mutually and the AC relay normally opened contact between the zero line, current-limiting resistance and light-emitting diode form.