CN2358618Y - Power-off protector for three-phase dynamo-electric motor - Google Patents
Power-off protector for three-phase dynamo-electric motor Download PDFInfo
- Publication number
- CN2358618Y CN2358618Y CN 98239454 CN98239454U CN2358618Y CN 2358618 Y CN2358618 Y CN 2358618Y CN 98239454 CN98239454 CN 98239454 CN 98239454 U CN98239454 U CN 98239454U CN 2358618 Y CN2358618 Y CN 2358618Y
- Authority
- CN
- China
- Prior art keywords
- contact
- relay
- dynamo
- power
- phase
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Motor And Converter Starters (AREA)
Abstract
The utility model relates to a power-off protector for three-phase dynamo-electric motors, which is composed of a relay J, a power supply line C < 0 >, relay normally closed contacts J< 1 > and J< 2 >, and a normally open contact J < 3 >, wherein, one end of the relay J is connected with a dynamo-electric motor star contact 0, and the other end is grounded. The normally closed contact J< 1 > is connected in series on an A phase line of the dynamo-electric motor; normally closed contact J < 2 > is connected in series on a B phase line of the dynamo-electric motor; the power supply line C < 0 > is connected to the dynamo-electric motor star contact 0 which is provided with the normally open contact J< 3 >. When any phase line of a three-phase dynamo-electric motors is powered off, the star contact 0 outputs 380 volts voltage, a coil of the relay J is switched on, the contacts J< 1 > and J < 2 > are switched off, and the power-off protection of a main line is completed; meanwhile, the contact J < 3 > is closed, and the relay J is continuously switched on.
Description
The utility model belongs to electronic technology field, is a kind of three phase electric machine power-off protector.
Three-phase power motor equipment is in running, and often because of multiple reason causes power supply circuit inter-burnout-ing motor, existing protector generally adopts the control circuit of control motor to carry out power-off protection, complex structure, and the cost height, uncontrollable when motor C cuts off the power supply mutually.
The purpose of this utility model is will provide a kind of can in time cut off main line when motor any cuts off the power supply mutually, carries out the motor power-off protector of power-off protection.
Solution of the present utility model is that condenser J is connected on the motor star contact O, the normally closed contact J of serial connection relay J on the A phase circuit of motor
1, the normally closed contact J of serial connection relay J on the B phase circuit
2, on motor star contact O, connect a power line C
0, power line C
0On the normal opened contact J of relay J is housed
3When any phase circuit generation powering-off state of three phase electric machine, star contact O exports 380 volts of voltages, the conducting of relay J coil electricity, contact J
1, J
2Disconnect, finish the main line power-off protection, simultaneously contact J
3Closure makes relay J continue conducting.
The utility model can carry out the motor open phase protection effectively, and performance is safe and reliable, and is simple in structure, and cost is low.
Below in conjunction with drawings and Examples the utility model is further specified:
Accompanying drawing is the utility model line map.
The utility model is by relay J, power line C
0With relay normally closed contact J
1, J
2And normal opened contact J
3Constitute relay J one termination motor star contact O, other end ground connection, normally closed contact J
1Be serially connected on the motor A phase circuit normally closed contact J
2Be serially connected on the motor B phase circuit power line C
0Connect on the motor star contact O power line C
0On normal opened contact J is housed
3When current of electric is big, can relay in parallel on the relay.K
1, K
2, K
3It is respectively the contactor of motor A, B, C phase.
Claims (1)
1, a kind of three phase electric machine power-off protector is characterized in that: it is by relay J, power line C
0With relay normally closed contact J
1, J
2And normal opened contact J
3Constitute relay J one termination motor star contact O, other end ground connection, normally closed contact J
1Be serially connected on the motor A phase circuit normally closed contact J
2Be serially connected on the motor B phase circuit power line C
0Connect on the motor star contact O power line C
0On normal opened contact J is housed
3
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98239454 CN2358618Y (en) | 1998-11-22 | 1998-11-22 | Power-off protector for three-phase dynamo-electric motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98239454 CN2358618Y (en) | 1998-11-22 | 1998-11-22 | Power-off protector for three-phase dynamo-electric motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2358618Y true CN2358618Y (en) | 2000-01-12 |
Family
ID=33986821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98239454 Expired - Fee Related CN2358618Y (en) | 1998-11-22 | 1998-11-22 | Power-off protector for three-phase dynamo-electric motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2358618Y (en) |
-
1998
- 1998-11-22 CN CN 98239454 patent/CN2358618Y/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 |