CN2279714Y

CN2279714Y - Safety grounding power socket with monitoring device

Info

Publication number: CN2279714Y
Application number: CN 96233982
Authority: CN
Inventors: 李曙光
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-11-01
Filing date: 1996-11-01
Publication date: 1998-04-22
Anticipated expiration: 2006-11-01

Abstract

The utility model provides a safety grounding power source socket with a monitoring device, wherein, output feet of a live wire and an earth wire which are arranged in a common three-wire system socket are bridged by a resistor and a neon bulb with large resistance values; the live wire of a common two-wire system socket is additionally provided with a power source switch and a fuse; the output feet of the live wire and a zero line are bridged by an AC relay and the neon bulb with a large resistance value. A safe grounding wire is supplied for an electric appliance which is connected with a plug through an output socket and the ground state is monitored; whether the plug is normal or not is displayed by whether the neon bulb is bright or not; accordingly, the safety of electric appliance users are guaranteed.

Description

The safety ground supply socket of band display monitor central monitoring system

The utility model belongs to electric line connector category, specifically is supply socket.

General supply socket does not all have monitor system, though common three-wire system socket has foot of the ground wire, earth connection may break the open circuit or socket in live wire come off, the overlap joint to the ground output pin of the line that broken, work the mischief.Common two-wire system socket does not have stitch safely, causes very big threat for the electricity consumption operator of two-wire system electric power system.Therefore, the common power socket no matter have or not the ground wire output pin, all might cause a hidden trouble to electrical equipment user safety.Chinese patent 902208721 disclosed " zero connection protection formula socket, plug " is discerned electric phase line emphatically, and ground connection need be passed through plug.

The purpose of this utility model provides a kind of have protective earth and monitor and display system thereof, and ground connection is good, the service-strong supply socket.

The purpose of this utility model is achieved in that safety ground is set monitors display circuit in common three-wire system, two-wire system socket, show and adopt neon bulb that current limliting has display aperture with big resistance resistance on the socket cover.The concrete practice is big resistance resistance of cross-over connection and a neon bulb supervision ground wire security situation between the live wire of common three-wire system socket and ground wire output pin, and big resistance resistance of a cross-over connection and neon bulb ND monitor the ground wire security situation.Set up mains switch and fuse on common two-wire system socket live wire, cross-over connection AC relay and big resistance resistance and neon bulb between live wire and zero line output pin again are for the two-wire system socket provides a protective earth.

The utlity model has following positive effect:

1. the supervision display circuit is set on the three-wire system socket, can in time prevents the unsafe factor that ground wire causes because of contingency, guarantee electrical equipment user safety.

2. protective circuit that on the two-wire system socket, is provided with and monitoring circuit; a protective earth not only can be provided; the two-line receptacle that does not have earth connection is become the three-wire system of ground protection socket, and can monitor the contingency of " ground wire ", guarantees safety.

3. the monitoring display circuit is simple, and is reliable, installs additional easily.Neon tube shows obviously eye-catching.

Below in conjunction with drawings and Examples the utility model is described in further detail.

Accompanying drawing provides two embodiment.

Fig. 1 is the supervision display circuit figure of embodiment 1.

Fig. 2 is for implementing the socket schematic diagram of Fig. 1.

Fig. 3 is the supervision display circuit figure of embodiment 2.

Fig. 4 is the socket schematic diagram of embodiment 2.

Embodiment 1.

Referring to Fig. 1, Fig. 2.

Big resistance resistance R of cross-over connection and neon bulb ND between live wire L in common three-plug connector and the output pin of ground wire E.On socket cover, have a circular hole and make the demonstration inspection hole of neon bulb.When the three-plug connector operate as normal, neon indicator energising is shinny, and when safety line breaks down, neon lamp does not work, and reminds the user in time socket to be overhauled.

Embodiment 2.

Referring to Fig. 3, Fig. 4.

In common two-wire system socket, on the live wire mains switch K is set, fuse BZ, cross-over connection AC relay J and big resistance resistance R, neon bulb ND between live wire and zero line output pin.When the K switch closure, the relay J coil is subjected to electricity, the normally opened contact adhesive, and the zero line that accessory power outlet " lower margin " and earthing is good is connected, for the electrical appliance that is connected with accessory power outlet by plug provides an effective protective earth.The monitoring circuit that big resistance resistance R, neon bulb ND form is supervised the safety ground state of accessory power outlet and to be shown.When relay contact break down, not closed or because of reasons such as socket back panel wiring open circuits, cause accessory power outlet " lower margin " obstructed with good zero line (the earth), neon indicator does not work, thereby reminds electrical equipment user maintenance.

Claims

1. the safety ground supply socket with display monitor central monitoring system is made of base, loam cake and circuit part, it is characterized in that: be provided with safety ground and monitor display circuit in socket, show and adopt neon bulb, current limliting adopts big resistance resistance, has display aperture on the socket cover.

2. safety ground supply socket as claimed in claim 1 is characterized in that: ground connection monitors that display circuit is that live wire in common three-wire system socket and ground wire output pin are with big resistance resistance R of cross-over connection and neon bulb ND.

3. safety ground supply socket as claimed in claim 1, it is characterized in that: ground connection monitors that display circuit is, on the live wire of common two-wire system socket, set up mains switch K and fuse BZ, cross-over connection AC relay J and big resistance resistance R, neon bulb ND between live wire and zero line output pin.