CN2161992Y

CN2161992Y - Automatic protective switch

Info

Publication number: CN2161992Y
Application number: CN 93236840
Authority: CN
Inventors: 王学银
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-05-12
Filing date: 1993-05-12
Publication date: 1994-04-13
Anticipated expiration: 2003-05-12

Abstract

The utility model relates to an electromechanical protection switch, which is mainly used as the power switch of the three-phase power supply equipment. The utility model is suitable for the easy occurrence situations of the circuit accident, such as, open-phase, phase lack, no-voltage, electric leakage, over-current, over-voltage, etc. The utility model is characterized in that it introduces a current transformer and an electric leakage testing circuit under the condition of not altering the volume of the original switch; after three power lines together pass through a zero sequence current transformer, every power line respectively passes through a current mutual inductor; the circuit is divided and made into two circuit boards which are arranged on the bottom of the lower cap and the switch main body; the circuit is connected by the cooperation of a multiheaded pointer plug and a multihole socket; utilizing a tripping electromagnet, drives a machine actuator. The utility model is integrated with many functions, which realizes a comprehensive safeguard to the electromechanical device.

Description

Automatic protective switch

The utility model relates to a kind of mechanical and electrical protection switch, is a kind of multi-functional Automatic Protection Switching that integrates open phase protection, o-volt protection, earth leakage protective and short-circuit protection.

Prior art of the present utility model is the three-phase sound and light alarm automatic power-off switch of the patent No. 922138451; this switch can be cut off the electricity supply when single phasing appears in circuit automatically; and send sound, visual alarm; but do not design leakage tests, earth leakage protective, short-circuit protection and o-volt protection, function singleness.

The purpose of this utility model is: do not change under the situation of old-fashioned three-phase plug-in strip volume, design a kind of Automatic Protection Switching that the kinds of protect function is integrated in one.

Accompanying drawing 1 is a stereogram of the present utility model.

Accompanying drawing 2 is the plane structure charts after the utility model is opened outer cover.

Accompanying drawing 3 is lower cover perspective views of the present utility model.

Accompanying drawing 4 is circuit theory diagrams of the present utility model.

The utility model is design like this: the multi-functional Automatic Protection Switching by Switch main body 56,

circuit board

2,55, safeties and acoustooptic alarm system are formed is characterized in that: circuit is divided into two partly.Make two

circuit boards

2,55, be installed in respectively on the switch lower cover 1 and the bottom of Switch main body 56.Embedding circuit board 2 on the switch lower cover 1, and bull Pin contact 9 is set on circuit board 2, pass the middle level dividing plate 10 of lower cover 1, between the position of three cartridge fuse 30 placements on the Switch main body 56, porous socket 27 is set, corresponding with bull Pin contact 9.Going out tie on porous socket 27 connects with the following circuit board 55 that is contained in Switch main body 56 bottoms.A mechanical actuating mechanism that is driven by release electromagnet 15 also is installed on the Switch main body 56, and three electric power incoming lines of switch together pass after the zero-sequence transformer 49 earlier, and every line passes a current transformer 25 more respectively.

The utility model novel structure design, the scope that it is limited is fully utilized, and the circuit that the unique bull Pin contact 9 and the setting of porous socket 27 make branch be located at switch lower cover 1 and Switch main body 56 bottoms is able to rational the connection.Introducing zero sequence current mutual inductor 49 cooperates as detection of electrical leakage with test knob 7.Operational amplifier of three current transformers 35 and control circuit etc. cooperates the phase shortage that plays circuit, the phase failure, and fault is carried out safeguard protection.Capacitor C ₁₃, C ₁₄, C ₁₅Access improved power factor and made switch economize on electricity.Utilize the circuit balancing principle, just can drive mechanical actuating mechanism, cut off the electricity supply automatically by release electromagnet 15 when serious uneven switch appears in three-phase circuit voltage.The utility model has increased again faults such as the phase failure, phase shortage, decompression, electric leakage, overcurrent, overvoltage has been detected and safety protection function on original safeties and acoustooptic alarm system basis, becomes a kind of multi-functional Automatic Protection Switching.

Accompanying drawing the 1,2,3, the 4th, most preferred embodiment of the present utility model, sign is described as follows among the figure:

1, lower cover; 2, go up circuit board; 3, pressing plate; 4, the knob that resets; 5, loudspeaker; 6, light-emitting diode; 7, test knob; 8, spring; 9, bull Pin contact; 10, dividing plate; 11, wiring guide plate; 12, elasticity holder; 13, back-moving spring pad; 14, alignment pin; 15, release electromagnet; 16, contact claw-plate; 17, fixed head; 18, hold-down screw; 19, return pin hold-down nut; 20, positioning guide plate; 21, interlock plate; 22, connecting rod; 23, spring; 24, connecting rod; 25, test button contact; 26, spring; 27, porous socket; 28, capacitor; 29, screw; 30, cartridge fuse; 31, lower cover pressing plate; 32, screw; 33, spring washer; 34, nut; 35, current transformer; 36, handle; 37, loam cake; 38, screw; 39, upper contact; 40, baffle plate; 41, spring; 42, the nextly decide plate; 43, plate washer; 44, lower contact; 45, screw; 46, packing ring; 47 nuts; 48, screw; 49, zero sequence current mutual inductor; 50, return pin; 51, positioning guide plate; 52, return pin; 53, spring; 54, bottom; 55, following circuit board; 56, Switch main body.

Claims

1, a kind of multi-functional Automatic Protection Switching is made up of Switch main body, circuit board, safeties and acoustooptic alarm system, it is characterized in that:

A, on embedding one on the lower cover 1 of switch circuit board 2, bull Pin contact 9 is set on circuit board, and passes the middle level dividing plate 10 of lower cover 1;

B, between the position that three cartridge fuses on the Switch main body 56 30 are placed porous socket 27 to be set corresponding with bull Pin contact 9;

C, a mechanical actuating mechanism and a following circuit board 55 that is driven by release electromagnet 15 is installed on Switch main body 56;

D, three power lines together pass after the zero sequence current mutual inductor 49, and every line passes a power transformer 35 more respectively.

2, a kind of multi-functional Automatic Protection Switching according to claim 1 is characterized in that: the connection of upper and lower circuit board 2,55 contacts with porous socket 27 by bull Pin contact 9, and porous socket 27 is drawn tie respectively and is connected with following circuit board 55.