CN204706946U - A kind of double power supply automatic transfer switch - Google Patents

Abstract

The utility model discloses a kind of double power supply automatic transfer switch, automatically can be switched to stand-by power supply in time when main power source breaks down, and the dual-power transfer switch of the main power source that can automatically switch back again when main power source recovers normal.Described switch comprises accurate biserial combined type contact, load-break switch, intelligent controller, voltage and frequency detection circuit, accurate biserial combined type contact has 4 groups of 16 copper terminals in change over switch inside, and 4 (being arranged in a row) of 4 of main power source (being arranged in a row) and stand-by power supply side by side and mutually insulated, and each terminal often arranged also mutually insulated (often arrange 4 terminals in have 3 line 1 connecting to neutral lines of starting to exchange fire) between two, inner two groups in addition (often organizing 4 terminals) loads also line up two rows side by side, and respectively with master, the terminal of stand-by power supply is aimed at (be convenient to single driven by motor load-break switch and carry out action) up and down, but two of inside groups of each corresponding terminals of load are connected in one piece between two and form 4 fritters of mutually insulated.

Description

A kind of double power supply automatic transfer switch

Technical field

The utility model relates to a kind of double power supply automatic transfer switch, adopts reliable mechanical interlocking and electrical interlock, substantially realizes zero arcing and emergency can force zero setting.

Background technology

At present double-power supply switching device, substantially be undertaken interlocking by two air switches separately joining corresponding mechanical interlocks in order to avoid the danger that causes of short circuit or overcurrent, but air interlocking is subject to weather effect comparatively large and mechanical interlocking also has the shortcomings such as power consumption is large, add the leading position that mostly can not automatically switch or safeguard a certain main power source, thus often go wrong unavoidably in engineering uses.

Summary of the invention

Air is only had to interlock and/or mechanical interlocking and unreliable and that power consumption the is large shortcoming that works for overcoming existing double-power supply switching device, the utility model provides a kind of double power supply automatic transfer switch, for automatically changing between primary, spare power supply, executive component adopts independently load-break switch and have mechanical interlocking and electrical interlock, uses more safe and reliable; Simultaneously, (change over switch inside is biserial combined type contact to be designed to accurate biserial combined type contact, but insulate between primary, spare power supply and separate and two of load groups of corresponding contacts have been connected in one piece, thus the outside of change over switch but shows as 3 groups is 3 × 4=12 contact), also using electrical micro-machine energy pre-storage and Controlled by micro computer technology, substantially zero arcing (without arc-control device) can be realized, but also in case of emergency can force zero setting, namely cut off two-way power supply, to meet the needs such as fire-fighting link simultaneously.

This dual-power transfer switch is made up of one (or several) transfer switching equipment and other required Controlled by micro computer part, is to integrate switch andlogic control and without the need to the dual power supply automatic switching device of additional controller.During work, after two-way (active and standby) supply voltage being carried out becoming in real time and send and process by corresponding instrument transformer, controller is sent into through analog-to-digital conversion, or through rectification and other relevant treatment to produce the zero-crossing pulse reflecting frequency, to realize the detection to two-way supply frequency, send after comparing finally by controller and known normal power supply voltage and frequency (storing), analyze and judge and connect or disjunction instruction, to realize the automatic switchover of duplicate supply.As detected there is phase shortage (disconnection of certain phase) in main power source, decompression, overvoltage, under-voltage, any situation of overclocking and under-frequency and stand-by power supply normal time, main power source will cut off immediately and automatically switch to stand-by power supply, other process can be carried out after slightly time delay a bit of time, this automatic switchover can solve as fire-fighting, hospital, bank, the emergency service problem in the important power supply place that skyscraper etc. do not allow power-off and amplitude and frequency not to allow to change, and frequent transitions power supply moment effectively can avoided abnormal and cause, the useful life of change over switch can be improved preferably, and when monitoring main power source and recovering normal, then power at the main power source that can automatically switch back under disposition, effectively maintain the leading position that main power source is powered, when also ensure that and normally work, only have a road Power supply, certainly also there is all abnormal situation of two-way power supply once in a while, at this moment will there will be warning, wait for that staff does emergency treatment, thus there is certain artificial intelligence.Wherein, the conversion system of switch adopts single motor to drive, the acceleration mechanism of the accumulation of energy of driven by motor switch spring, instantaneous relase performs load-break switch conversion, quick-make or disjunction power supply, conversion steadily reliably and greatly extinguished electric arc and deliberately need not design corresponding arc-control device, and motor driving only has electric current to pass through in switch transition moment side, obvious energy conservation.In addition, in case of emergency can force zero setting, i.e. hand off two-way power supply, to meet fire-fighting link needs; Also can under two-way power supply all abnormal conditions, for guaranteeing to produce or power quality and helplessly carry out pressures zero setting, to avoid bringing larger economic loss, there is corresponding position to indicate simultaneously, namely indicating and be in pressure zero setting state at present.This double power supply automatic transfer switch, because have employed Electromechanical Design truly, switch transition is accurate, flexible, smooth and easy.

The beneficial effects of the utility model are, without the need to additional controller with under specially arranging arc-control device situation, reliably can realize the automatic switchover between primary, spare two-way power supply, and can effectively safeguard main power source power leading position situation under, a road power supply is only had to power when guaranteeing normally to work, and carry out when two-way power supply is all abnormal reporting to the police to treat that people is for special processing, there is certain artificial intelligence, and in case of emergency can carry out hand-operated forced zero setting, to meet the possible period of want or need.

Accompanying drawing explanation

Fig. 1 is the structural representation of the utility model double power supply automatic transfer switch;

Fig. 2 is voltage detecting circuit structure chart;

Fig. 3 is frequency detection circuit structure chart.

Description of reference numerals: 1-accurate biserial combined type contact, 2-position indicates, and the electric key lock of 3-, 4-base, 5-isolates padlock, 6-switch main body.

Embodiment

Below in conjunction with drawings and Examples, to above-mentioned being described in more detail with other technical characteristic and advantage of the utility model.

First the base 4 in Fig. 1 is fixed, in case relative movement or vibration occur and causes wiring to disconnect and other phenomenon during change over switch work.When electric key lock 3 is opened, transfer switch is operated in automatic operation state, otherwise manual operation only; When electric key lock is closed, isolation padlock 5 ability pull-up padlock mechanism also upper padlock, at this moment position instruction 2 clearly can reflect this point, next switch can be in by operating grip and force zero setting state, so that safety is overhauled, but because now internal control power supply all cuts off, switch cannot be electronic and also cannot realize manually.Under being in automatic operation state, as long as it is abnormal that voltage detecting circuit (structure as shown in Figure 2) or frequency detection circuit (structure as shown in Figure 3) measure main power source, upper row 4 (main power source link) in accurate biserial combined type contact 1 then in switch main body 6 and lower row 4 (load link) disconnect automatically, and upper row 4 (stand-by power supply link) in stand-by power supply and lower row 4 (external load link be two groups public only have 4) demand working slightly time delay a bit of time (show 4 parallel arranged of main power source in 4 contacts of stand-by power supply and figure but do not reflect in figure), if detect, main power source recovers normal, then automatically cut off stand-by power supply and connect main power source, effectively maintaining the leading position that main power source is powered, if be in an emergency, first can close electric key and perform hand-operated forced zero setting after isolating padlock.

Above-described embodiment is only be described preferred implementation of the present utility model; not scope of the present utility model is limited; under the prerequisite not departing from the utility model design spirit; the various distortion that those of ordinary skill in the art make the technical solution of the utility model and improvement, all should fall in protection range that the utility model claims determine.

Claims (1)

1. a double power supply automatic transfer switch, it is characterized in that: comprise outside accurate biserial combined type contact, described accurate biserial combined type contact is divided into two rows to tap into contact and a row picks out contact, often row has 4 wiring contacts, wherein 3 start to exchange fire line and another connecting to neutral lines, described change over switch inside has 4 groups of 16 copper terminals, and 4 of corresponding main power source with 4 of stand-by power supply side by side and mutually insulated, each terminal often arranged also mutually insulated between two; Inner two groups of 8 terminal face terminals also line up two rows side by side in addition, and aim at up and down with the terminal of primary, spare power supply respectively, two groups of inner each corresponding terminals are connected in one piece between two and form 4 fritters of mutually insulated, reach outside switch and namely form an outer existing row 4 contacts; Described change over switch inside is provided with the load-break switch of single driven by motor, intelligent controller, voltage and frequency detection circuit, and described voltage and frequency detection circuit connect described intelligent controller, and described intelligent controller connects described load-break switch; Described voltage and frequency detection circuit moment reflect the state of standby usage power supply to described intelligent controller, once find input power source abnormality, intelligent controller will send instruction to drive load-break switch action to single motor.