CN2864963Y

CN2864963Y - AC Contactor for Switching Capacitors

Info

Publication number: CN2864963Y
Application number: CNU200620100882XU
Authority: CN
Inventors: 陈守约
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-01-31
Filing date: 2006-01-31
Publication date: 2007-01-31
Anticipated expiration: 2016-01-31

Abstract

An AC contactor for switching capacitors, comprising a main contactor of the contactor and a capacitor bank. The capacitor bank is connected with a fast discharge circuit. to the middle phase. The utility model is characterized in that after the capacitor is cut off, a fast discharge circuit of the capacitor is added, so that the voltage of the capacitor itself can be reduced to the lowest level when the capacitor is switched on next time, effectively limiting part of the source of the inrush current. Due to the realization of sufficient capacitor discharge, the operating frequency of the contactor is increased to 120 times per hour, and the inrush current can be controlled within 10 times the rated current value, which improves the service life and safety performance of the AC contactor, especially suitable for microcomputer clusters controlled capacitor cabinet.

Description

The switch capacitor A.C. contactor

One, technical field

The utility model relates to a kind of contactor, refers in particular to a kind of switch capacitor A.C. contactor.

Two, background technology

With CJI6, CJ19 series switch capacitor A.C. contactor is such contactor of representative, abandoned having continued to use the method for the tandem reactor current limliting of decades, adopt charge circuit major loop be connected the method that allows the capacitor charging before and then connect fully, reduced shoving that the electric current connected produces, all can be controlled at present in 15 times, still still be difficult to be applicable to the capacitor panel of microcomputer team control.

Three, utility model content

The purpose of this utility model is: improve on the A.C. contactor basis at CJ19 series switch capacitor, derive a kind of CJ19C series switch capacitor A.C. contactor switch capacitor, it has improved the control ability of shoving, and is specially adapted to the capacitor panel of microcomputer team control.

For achieving the above object, the solution that the utility model is taked is: a kind of switch capacitor A.C. contactor, comprise main noddle on contactor and capacitor group, described capacitance group is connected to the repid discharge loop, this repid discharge loop be by capacitor group two-phase all be connected in series discharge resistance with the discharge auxiliary contact in constitute mutually.

Along with the extensive use of computer technology, the capacitor panel of microcomputer team control is widely adopted.In the capacitor panel of microcomputer team control, the problem that exists switching frequency to accelerate.Because the self discharge function of common power capacitor is generally finished within 3min, makes frequency of operation be subjected to certain limitation, shove otherwise produce the waveform stack and then can heighten.Characteristics of the present utility model are to have increased the repid discharge loop of capacitor in excision behind the capacitor, thereby can guarantee that the voltage of capacitor self when connecting next time reduces to floor level, have limited the part source of shoving effectively.Owing to realized sufficient capacitor discharge the frequency of operation of contactor is brought up to per hour 120 times, simultaneously can make to shove and be controlled in 10 times of load current values, improve the useful life and the security performance of A.C. contactor, be specially adapted to the capacitor panel of microcomputer team control.

Four, description of drawings

Below in conjunction with embodiment and accompanying drawing thereof the utility model is remake description.

Fig. 1 be prior art (only have charge function disjunction and connect capacitor group A.C. contactor) oscillogram.

Fig. 2 is the oscillogram of present embodiment.

Fig. 3 is the circuit theory diagrams of present embodiment.

Among the figure: a, power supply wave shape, b, capacitor group waveform, the voltage waveform after c, the stack, 1, the capacitor group, 2, main noddle on contactor, 3, discharge resistance, 4, the discharge auxiliary contact, 5, charging resistor, 6, the charging auxiliary contact.

Five, embodiment

Referring to Fig. 3, a kind of switch capacitor A.C. contactor, comprise main noddle on contactor 2 and capacitor group 1, described capacitance group 1 is connected to the repid discharge loop, this repid discharge loop be by capacitor group 1 two-phase all be connected in series discharge resistance 3 with the discharge auxiliary contact 4 in constitute mutually.

Referring to Fig. 3, described main noddle on contactor 2 except that in mutually other two-phase all connect charge circuit, this charge circuit is formed by charging auxiliary contact 6 and charging resistor 5 serial connections.

Present embodiment has been done special processing to the parameter of main noddle on contactor 2 again, make main noddle on contactor 2 in guarantee that mutually leading other two-phase arrives, guaranteed that promptly charging auxiliary contact 6 shifts to an earlier date main noddle on contactor 2 and reaches on-state, thereby reduced by one group of charge circuit, circuit is finished in the charging of realization two-phase, thereby has simplified mechanical mechanism.

Referring to Fig. 1 and Fig. 2, the voltage waveform after the present embodiment stack is significantly less than disjunction of only having a charge function shown in Figure 1 and connects the voltage waveform of capacitor group with A.C. contactor.This explanation is not when the impedance of capacitor changes, because voltage obviously descends, make shoving of capacitor group 1 obviously reduce, generally can be controlled in 10 times of load current values, thereby reduce the contact heating widely, the useful life and the security performance of A.C. contactor have been improved, can also improve simultaneously the frequency of operation of A.C. contactor, be specially adapted to the capacitor panel of microcomputer team control, realized efficient switching, can reduce to below the 50V fully at the voltage of the spacer capacitor of per hour operating for 120 times.

The product type name of present embodiment is called CJ19C series switch capacitor A.C. contactor.

Claims

1, a kind of switch capacitor A.C. contactor, comprise main noddle on contactor (2) and capacitor group (1), it is characterized in that: described capacitance group (1) is connected to the repid discharge loop, this repid discharge loop be by capacitor group (1) two-phase all be connected in series discharge resistance (3) and discharge auxiliary contact (4) in constitute mutually.

2, a kind of switch capacitor A.C. contactor according to claim 1, it is characterized in that: described main noddle on contactor (2) except that in mutually other two-phase all connect charge circuit, this charge circuit is connected in series by charging auxiliary contact (6) and charging resistor (5) and forms.