CN201975761U

CN201975761U - Intelligent control protecting switch

Info

Publication number: CN201975761U
Application number: CN2011200531021U
Authority: CN
Inventors: 陈炳杰
Original assignee: 天津北方恒业电气技术有限公司
Priority date: 2011-03-03
Filing date: 2011-03-03
Publication date: 2011-09-14

Abstract

The utility model relates to an intelligent control protecting switch. A central processing unit of the intelligent control protecting switch is respectively connected with a control module, a communication module, a liquid-crystal display module, a press key and indication module, an external interface module, a first current mutual inductor L1, a second current mutual inductor L2 and a third current mutual inductor L3, wherein the control module is connected with a contactor module , and a power supply module is respectively connected with the central processing unit, the control module, the communication module, the liquid-crystal display module, the press key and indication module and the external interface module. The intelligent control protecting switch has the beneficial effects that through high performance of a system device, the breaking capacity and the rated operation short-circuit breaking capacity are improved, the single-machine control is realized, the product size is reduced, the total power is lower than 2VA, the electric arc is reduced, the service life of the switch is prolonged, a switch product is integrated with intellectualization, communication and control technology, and various protection functions are realized.

Description

Intelligent control protection switch

Technical field

The utility model relates to a kind of Electric Machine Control, the intelligent control protection switch in particularly a kind of distribution system that is applied to protect 37kw and following three-phase AC asynchronous motor and 5kA.

Background technology

At present, in the existing Electric Machine Control protection system, generally all by circuit breaker, contactor, thermal relay even add that the time relay forms.Circuit breaker has only overcurrent protection function, and useful life is about 10,000 times; The contactor long service life, but do not have breaking capacity; The thermal relay defencive function is single, precision is low, action is unstable, and investigation finds, asynchronous machine more than 90% be stator winding because of crossing cause thermal damage, wherein nearly 60% because of open phase fault causes, this has illustrated that thermal relay is insecure as open phase protection.

Summary of the invention

In view of the deficiency that prior art exists, the intelligent control protection switch that the utility model provides a kind of can make multiple parameter detecting, have the kinds of protect function, multiple motor moves the field bus communication interface function of controlling and matching.

The technical scheme that the utility model is taked for achieving the above object is: a kind of intelligent control protection switch; comprise center processing unit; control module; power module; communication module; LCD MODULE; button and indicating module; external interface module; the contactor module; the first current transformer L1; the second current transformer L2; the 3rd current transformer L3; it is characterized in that: described center processing unit respectively with control module; communication module; LCD MODULE; button and indicating module; external interface module; the first current transformer L1; the second current transformer L2; the 3rd current transformer L3 connects; described control module is connected with the contactor module, described power module respectively with center processing unit; control module; communication module; LCD MODULE; button and indicating module; external interface module connects.

The beneficial effects of the utility model are:

1. the high-performance of system's components and parts; The HCPS1 series switch adopts the dspic high speed processor, and energy connection, carrying, breaking current 16Ie, short circuit instantaneous protection improve breaking capacity, specified operation short circuit breaking capacity 5KA, specified limit short circuit breaking capacity 10KA less than 10ms;

2. the high reliability of Switch main body and annex; Replace multiple components and parts such as conventional circuit breaker, contactor, thermal relay, realize unit control, system reliability greatly improves;

3. further reduced the volume of product; Change the conventional arrangement mode of multicomponent tandem compound, on installing space, reduced 50%;

4. energy-conservation environmental protection; Total power consumption keeps power 32VA to reduce greatly less than 2VA than original contactor pull-in winding after the HCPS1-63 adhesive;

5. improved the useful life of components and parts; Phase breaking technology at zero point during the HCPS1 series switch adopts has reduced the impact to electrical network greatly.And guarantee each disjunction three-phase current not on peak value, reduce electric arc, the life-span of having improved switch;

6. but the switch product is integrated intelligent communication and control technology; Have the kinds of protect function, carry out Long-distance Control by 485 interfaces, the user can carry out real-time monitoring and control by the ModBus bus to equipment at any time, for the client has reserved enough performance spaces in the design of automation more from now on.The remote-control operation interface that product is reserved, the user can cause it panel and also can finish the control of equipment ground, and the user need not strictly consider the size of distribution cabinet like this.

Description of drawings

Fig. 1 is that circuit of the present utility model connects block diagram.

Embodiment

As shown in Figure 1; a kind of intelligent control protection switch; comprise center processing unit; control module; power module; communication module; LCD MODULE; button and indicating module; external interface module; the contactor module; the first current transformer L1; the second current transformer L2; the 3rd current transformer L3; center processing unit respectively with control module; communication module; LCD MODULE; button and indicating module; external interface module; the first current transformer L1; the second current transformer L2; the 3rd current transformer L3 connects; control module is connected with the contactor module, power module respectively with center processing unit; control module; communication module; LCD MODULE; button and indicating module; external interface module connects.

Central processing module comprises current signal collection, phase sequence signals collecting, signal processing circuit and signal output.

Signal transmission between the circuit: push button signalling, current signal input, phase sequence input signal are through after the signal processing circuit, entering central microprocessor handles, signal after the processing outputs to each several part output module (liquid crystal, indicator light, buzzer) or to memory cell EEPROM storage, drives electromagnetic mechanism simultaneously and come execution; Data and display module, Modbus bus that central microprocessor is handled pass mutually.

Operation principle: this product is monitored three-phase (U, V, W) electric current by real-time and effective, realizes various prediction phenomenons in the circuit are handled fast and effectively.

Gather the signal of L1, L2, three instrument transformers of L3 and the current value in the shortest Time Calculation outlet fast and effectively by center processing unit.When current value during in the scope of setting greater than the user, the situation that the root a tree name is different, central processing unit is taked different processing, drives the contactor module by control circuit and moves.

1. start: at this moment electric current is very big, but by the analysis of center processing unit to information-setting by user, and the big electric current when starting of distinguishing that can be clear and definite does not process.If but the phenomenon that is short-circuited is then done disjunction immediately and is handled.

2. overload: at this moment electric current is obviously greater than user's rated current.Center processing unit is done respective handling according to the inverse time lag curve very accurately by the monitoring meeting to three-phase current.If reach the disjunction condition, center processing unit can send effective instruction to control unit, makes KC finish circuit " zero passage " disjunction (the zero passage disjunction is the effective protection to contactor, with abundant prolongation its useful life) more accurately.

3. limit disjunction: when circuit any was short-circuited mutually, center processing unit can be finished disjunction in the fastest time (10mS), reach the function of effective protection.

The utility model detected parameters comprises: A phase current, B phase current, C phase current, average current, phase sequence, switch number of times.

The utility model defencive function comprises: the overtime protection of electric motor starting, overload protection, open circuit protection, open phase protection, phase sequence, unbalance protection of three-phase current.

The utility model controlled function comprises: starting control, stop control, promptly stop control, across-the-line starting control, reversible electric machine control, double-speed motor control, star-triangle starting control, auto-induction voltage-reduced starting control, resistance reduced voltage starting and control.

Claims

1. intelligent control protection switch; comprise center processing unit; control module; power module; communication module; LCD MODULE; button and indicating module; external interface module; the contactor module; the first current transformer L1; the second current transformer L2; the 3rd current transformer L3; it is characterized in that: described center processing unit respectively with control module; communication module; LCD MODULE; button and indicating module; external interface module; the first current transformer L1; the second current transformer L2; the 3rd current transformer L3 connects; described control module is connected with the contactor module, described power module respectively with center processing unit; control module; communication module; LCD MODULE; button and indicating module; external interface module connects.