FIELD: electricity.
SUBSTANCE: device consists of power direction control unit, starter unit of minimum frequency, first logic unit, first timer, first minimum voltage control unit, second logic unit, second timer, third logic unit, first actuator, second minimum voltage control unit, third timer and second actuator. First timer is minimum frequency protection output with control of power direction. Second timer is first stage output of minimum voltage protection with control of power direction. Third timer is second stage output of minimum voltage protection. First actuator switches off input section of switchgear that lost power supply and breaks field of synchronous motors at input section of switchgear that lost power supply. Second actuator switches off electric motors.
EFFECT: improvement of reliability and enhancement of process system stability.
2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| POWER SUPPLY LOSS PROTECTION DEVICE | 2011 |
|
RU2460198C1 |
| POWER LOSS PROTECTION DEVICE | 2014 |
|
RU2573603C1 |
| DEVICE OF PROTECTION AGAINST LOSS OF POWER AT SUBSTATIONS WITH FREQUENCY-CONTROLLED ELECTRIC DRIVES | 2011 |
|
RU2459339C1 |
| AUTOMATIC CIRCUIT RECLOSER ON SUBSTATIONS WITH HIGH VOLTAGE ELECTRIC MOTORS | 2016 |
|
RU2636576C1 |
| DEVICE FOR PROTECTION AGAINST POWER LOSS AT SUBSTATIONS OF ENTERPRISES WITH PROCESS STANDBY | 2012 |
|
RU2496210C1 |
| DEVICE OF PROTECTION AGAINST LOSS OF POWER AT SUBSTATIONS WITH FREQUENCY-CONTROLLED SYNCHRONOUS MOTORS | 2011 |
|
RU2459332C1 |
| POWER SUPPLY LOSS PROTECTION DEVICE | 2009 |
|
RU2400905C1 |
| DEVICE FOR PROTECTION AGAINST LOSS OF POWER SUPPLY | 2007 |
|
RU2342755C1 |
| POWER LOSS PROTECTION DEVICE | 2010 |
|
RU2421860C1 |
| DEVICE OF ADAPTIVE AUTOMATIC LOAD TRANSFER | 2014 |
|
RU2563629C1 |
