CN2184282Y - Phase order and incomplete phasing protector of a resistance and reactance type - Google Patents
Phase order and incomplete phasing protector of a resistance and reactance type Download PDFInfo
- Publication number
- CN2184282Y CN2184282Y CN 94227636 CN94227636U CN2184282Y CN 2184282 Y CN2184282 Y CN 2184282Y CN 94227636 CN94227636 CN 94227636 CN 94227636 U CN94227636 U CN 94227636U CN 2184282 Y CN2184282 Y CN 2184282Y
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- Prior art keywords
- phase
- sequence
- relay
- inductance
- resistance
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- Expired - Fee Related
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Abstract
The utility model relates to a phase order and incomplete phasing protector. A traditional protector generally has the disadvantages of no protection function of wrong phase-sequence connection, complicated structure, and slow response speed. The utility model comprises the detection device of phase-sequence and incomplete phase, and a protection relay. The detection device of phase-sequence and incomplete phase comprises a capacitor, an inductance, and a resistor; one end of the capacitor, one end of the inductance, and one end of the resistor are connected together, and the other end of the capacitor, the other end of the inductance, and the other end of the resistor are respectively connected with three phase wires; a diode rectification bridge is connected in series with the inductance, and the output end of the bridge is connected with a phase sequence relay which is connected between the capacitor and the resistor. When the phase-sequence is connected wrongly or phase is incomplete, the utility model can cut off a power supply instantly to protect electric equipment.
Description
The utility model relates to a kind of phase sequence and open phase protector.Relate in particular to a kind of resistance reactance type phase sequence and open phase protector.
In various three-phases or heterogeneous equipment and device, make device damage for preventing equipment and device because of the electric power system phase shortage, generally all be equipped with various open phase protectors, when the current supply circuit phase shortage, end to equipment and device power supply, to protect these equipment and device.Unreliable or the response action hysteresis of some work of the various open phase protectors of Chu Shouing in the market can not be protected equipment or various device effectively.Though and some protector performance is preferable, the also corresponding increase of cost.And all do not have the phase sequence effect in above-mentioned these protectors.
The purpose of this utility model is to provide a kind of phase sequence and open phase protector, is characterized in simple in structure, with low cost, and has the phase sequence function.
Design of the present utility model is as follows: resistance reactance phase sequence of the present utility model and open phase protector comprise phase sequence and phase shortage checkout gear and protection relay, described protection relay is open type three contact relays, its three contacts are serially connected in three of protected current supply circuit respectively and go up mutually, it is characterized in that, described phase sequence and phase shortage checkout gear comprise electric capacity, inductance and resistance, described electric capacity, one end of inductance and resistance is connected on respectively on three phase lines of power supply according to the order of sequence, and there is an open phase relay to be connected between wherein two phase lines in above-mentioned three phase lines described electric capacity, the other end of inductance and resistance links together; Be serially connected with the diode rectification electric bridge on described inductance, the output of described diode bridge is connected to a phase sequence relay; The contact commonly used of described open phase relay and phase sequence relay is connected in series with described protection relay.
Wrong phase sequence when occurring phase shortage or terminal block in the current supply circuit; then open phase relay or the phase sequence relay in phase sequence and the phase shortage checkout gear will move, and its contact is opened, thereby make the protection relay action; disconnect the current supply circuit of power consumption equipment, reach the effect of protection equipment.As can be seen from the above, structure of the present utility model is very simple, thereby cost is more honest and cleaner.
Below in conjunction with accompanying drawing, describe embodiment of the present utility model in detail.
Fig. 1 is the circuit diagram of resistance reactance type phase sequence of the present utility model and open phase protector.
As shown in Figure 1; resistance reactance type phase sequence of the present utility model and open phase protector comprise phase sequence and phase shortage checkout gear and protection relay C; protection relay C is used for disconnecting power consumption equipment when phase shortage and phase sequence wrong; as the current supply circuit of three-phase motor D, its three normally opened contact C-1, C-2, C-3 are connected on respectively on three phase lines of power consumption equipment.Phase sequence and phase shortage checkout gear are by capacitor C 1, inductance L 1, resistance R 1, diode rectification electric bridge DQ, open phase relay JC and phase sequence relay JZ forms, inductance L 1 and diode bridge DQ serial connection, capacitor C 1, inductance L 1, resistance R 1 one ends are connected to respectively on three phase lines of power supply according to the order of sequence, and between capacitor C 1 and resistance R 1, meet an open phase relay JC, the other end of capacitor C 1, inductance L 1 and resistance R 1 is connected together, and constitutes three-phase Y type circuit.Certainly above-mentioned open phase relay JC also can be connected between capacitor C 1 and the inductance L 1 or be connected between inductance L 1 and the resistance R 1.
As shown in Figure 1, be connected to a phase sequence relay JZ at the output of diode bridge DQ, open phase relay JC and phase sequence relay JZ respectively have a normally opened contact JC-1 and a JZ-1, and normally opened contact JC-1, JZ-1 and protection relay C are serially connected.
The following describes the operation principle of resistance reactance type phase sequence of the present utility model and open phase protector.If phase sequence is correct and do not have a phase shortage phenomenon; the then equal adhesive of normally opened contact JC-1, JZ-1 of open phase relay JC and phase sequence relay JZ; make protection relay C action; threephase motor D gets electric work; if phase sequence wrong when wiring; then the voltage of diode rectification electric bridge DQ rectification output is lower, can not make phase sequence relay JZ action, thereby protection relay C also can not move.If phase failure phenomenon occurs when operate as normal, then the normally opened contact JC-1 of open phase relay JC closure disconnects immediately, and protection relay C outage is cut off motor D power supply, to protect.
In sum, resistance reactance type phase sequence of the present utility model and open phase protector have phase sequence wrong and phase failure protection function concurrently. And simple in structure, easy to use, be the desirable protectors of three-phase equipment such as motor.
Claims (1)
1, a kind of resistance reactance type phase sequence and open phase protector, comprise phase sequence and phase shortage checkout gear and protection relay, described protection relay is open type three contact relays, its three contacts are serially connected in three of protected current supply circuit respectively and go up mutually, it is characterized in that, described phase sequence and phase shortage checkout gear comprise electric capacity, inductance and resistance, described electric capacity, one end of inductance and resistance is connected on respectively on three phase lines of power supply according to the order of sequence, and there is an open phase relay to be connected between wherein two phase lines in above-mentioned three phase lines described electric capacity, the other end of inductance and resistance links together; Be serially connected with the diode rectification electric bridge on described inductance, the output of described diode bridge is connected to a phase sequence relay; The contact commonly used of described open phase relay and phase sequence relay is connected in series with described protection relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94227636 CN2184282Y (en) | 1994-01-28 | 1994-01-28 | Phase order and incomplete phasing protector of a resistance and reactance type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94227636 CN2184282Y (en) | 1994-01-28 | 1994-01-28 | Phase order and incomplete phasing protector of a resistance and reactance type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2184282Y true CN2184282Y (en) | 1994-11-30 |
Family
ID=33840344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94227636 Expired - Fee Related CN2184282Y (en) | 1994-01-28 | 1994-01-28 | Phase order and incomplete phasing protector of a resistance and reactance type |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2184282Y (en) |
-
1994
- 1994-01-28 CN CN 94227636 patent/CN2184282Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |