CN2238498Y

CN2238498Y - Multifunctional automatic air switch

Info

Publication number: CN2238498Y
Application number: CN 95201303
Authority: CN
Inventors: 汤光锡
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-01-20
Filing date: 1995-01-20
Publication date: 1996-10-23
Anticipated expiration: 2005-01-20

Abstract

The utility model relates to a multifunctional automatic air switch. An existing automatic air switch is additionally provided with three normally open relays and an electrical magnet, wherein, a signal terminal of a first relay is connected with an A phase line in a circuit, a second relay is connected with a B phase line in the circuit, and a third relay is connected with a C phase line in the circuit. A switch of each relay is connected between the electrical magnet and a power supply line. The electrical magnet is arranged at a place where a release in an existing air switch is positioned. The utility model has the advantages of compact structure and reliable work. The utility model can react for various abnormal phenomena. The utility model can ensure that electricity is safely used.

Description

Multi-functional automatic air-break switch

The utility model relates to a kind of multi-functional automatic air-break switch, especially has the automatic air-break switch of the phase failure, under-voltage protection.

Existing automatic air-break switch mainly is made up of single-phase or heterogeneous switching device, overload protecting mechanism, short current protective mechanism and release.Above-mentioned switching device is used to switch on or off each phase power line, and under the state of energized, if transship, during the abnormal conditions of short circuit, above-mentioned overload protecting mechanism or short current protective mechanism can utilize release, make above-mentioned switching device automatic disconnection.The weak point of existing automatic air-break switch is: can only make a response to overload, two kinds of circuit abnormality situations of short circuit, for the phase failure, fall phase, abnormal conditions such as under-voltage can not be made a response, and therefore can not guarantee Electrical Safety.

The purpose of this utility model is to provide a kind of multi-functional automatic air-break switch, can make a response and cuts off switching device automatically multiple abnormal conditions.

The technical solution adopted in the utility model is to set up three normally opened relays, an electromagnet on existing automatic air-break switch.Wherein the signal end of first relay links to each other with A phase line in the circuit, and second relay links to each other with B phase line in the circuit, and the 3rd relay links to each other with C phase line in the circuit.The switch of each relay is connected between electromagnet and the power line.Electromagnet is installed in the release place in the existing air switch.

Advantage of the present utility model is: compact conformation, reliable operation can be reacted to multiple anomaly, can guarantee Electrical Safety.

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

Fig. 1 is that the utility model is applied in a kind of circuit structure diagram in the 380V air switch.

Fig. 2 is that the utility model is applied in a kind of circuit structure diagram in the 220V air switch.

Embodiment 1: three relays described in this example all have two switch contacts, as shown in Figure 1, and first relay J wherein ₁Signal end respectively with circuit in A mutually, the B phase line connects; Second relay J ₂Signal end respectively with circuit in B mutually, the C phase line connects; The 3rd relay J ₃Signal end respectively with circuit in A mutually, the C phase line connects.The switch JK of first relay ₁In the two ends that are connected electromagnet L and the circuit B mutually, between the C phase line.The switch JK of second relay ₂In the two ends that are connected electromagnet L and the circuit A mutually, between the B phase line.The switch JK of the 3rd relay ₃In the two ends that are connected electromagnet L and the circuit A mutually, between the C phase line.Electromagnet L is installed in release 1 place in the air switch.

When A cuts off the power supply mutually, first relay J ₁With the 3rd relay J ₃Outage, the switch JK of first relay ₁Switch JK with the 3rd relay ₃Connect, make the two ends of electromagnet L be communicated with B, C phase line in the power line respectively, after electromagnet L powers on, drive release 1 and work, can disconnect this air switch.When in like manner open phase fault takes place one of other two-phase, electromagnet is powered on, thereby disconnect this air switch.In the time of can not keeping above-mentioned relay when occurring under-voltage in the circuit and power on, can cause the corresponding relays switch connection equally, electromagnet L powers on, thereby disconnects air switch.

Embodiment 2: this routine described circuit structure as shown in Figure 2, first relay J ₁Signal end respectively with circuit in the A phase line be connected second relay J with zero line 0 ₂Signal end respectively with circuit in the B phase line be connected the 3rd relay J with zero line 0 ₃Signal end respectively with circuit in the C phase line be connected with zero line 0.Electromagnet L is installed in release 1 place in the air switch, and its two power lines represent that with M end and N end wherein the M end is connected on the zero line 0 the switch JK of first relay respectively ₁Be connected between the N end of B phase power line and electromagnet L the switch JK of second relay ₂Be connected between the N end of C phase power line and electromagnet L the switch JK of the 3rd relay ₃Be connected between the N end of A phase power line and electromagnet L, when the phase failure of A phase, electric adhesive under first relay, the N of electromagnet L end and B power line mutually connect, and the electromagnet rear drive release 1 that powers on is worked, and can disconnect this air switch, in like manner, any one mutually or the two-phase power supply phase failure or when under-voltage, electromagnet L worked on power, thereby disconnect this air switch.

Claims

1, a kind of multi-functional automatic air-break switch comprises switching device and release (1), it is characterized in that setting up three normally opened relay (J on existing automatic air-break switch ₁, J ₂, J ₃) and an electromagnet (L), the wherein first relay (J ₁) signal end link to each other the second relay (J with A phase line in the circuit ₂) link to each other the 3rd relay (J with B phase line in the circuit ₃) link to each other the switch (JK of each relay with C phase line in the circuit ₁, JK ₂, JK ₃) be connected between electromagnet (L) and the power line, the release (1) that electromagnet (L) is installed in the existing air switch is located.

2, multi-functional automatic air-break switch as claimed in claim 1 is characterized in that the first relay (J ₁) signal end respectively with circuit in A mutually, the B phase line connects; Second relay (the J ₂) signal end respectively with circuit in B mutually, the C phase line connects; The 3rd relay (J ₃) signal end respectively with circuit in A mutually, the C phase line connects above-mentioned three relay (J ₁, J ₂, J ₃) respectively have an a pair of switch contacts (JK ₁, JK ₂, JK ₃), the switch (JK of first relay ₁) be connected electromagnet (L) two ends and circuit in B mutually, between the C phase line, the switch (JK of second relay ₂) be connected electromagnet (L) two ends and circuit in A mutually, between the B phase line, the switch (JK of the 3rd relay ₃) be connected electromagnet (L) two ends and circuit in A mutually, between the C phase line, the release (1) that electromagnet (L) is installed in the air switch is located.

3, multi-functional automatic air-break switch as claimed in claim 1 is characterized in that the first relay (J ₁) signal end respectively with circuit in the A phase line be connected the second relay (J with zero line (0) ₂) signal end respectively with circuit in the B phase line be connected the 3rd relay (J with zero line (0) ₃) signal end respectively with circuit in the C phase line be connected with zero line (0), the release (1) that electromagnet (L) is installed in the air switch is located, the M of electromagnet (L) end is connected on the zero line (0) switch (JK of first relay ₁) be connected between the N end of B phase power line and electromagnet (L) switch (JK of second relay ₂) be connected between the N end of C phase power line and electromagnet (L) switch (JK of the 3rd relay ₃) be connected between the N end of A phase power line and electromagnet (L).