FIELD: engineering of microprocessor overcurrent releases.
SUBSTANCE: into release device, electronic keys are inserted phase-wise, which are controlled by microprocessor, while in each phase one key is connected between rectifier of current being measured and accumulating capacitor, while second key is connected between current transformer and measuring resistor. Measurement of current value is performed in turns for each phase in the moment of forced commutation of measuring resistor with secondary winding of current transformer, thus allowing measuring of non-distorted current value due to stopped charging of accumulating capacitor during current measuring process.
EFFECT: increased precision of activation of microprocessor release due to improved algorithm of processing of current signal.
1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| DEVICE FOR PROTECTIVE DISCONNECTION IN AC CIRCUIT WITH GROUNDED NEUTRAL | 1997 |
|
RU2124794C1 |
| DEVICE FOR CURRENT PROTECTION FROM DAMAGE IN AC MAINS | 0 |
|
SU743098A1 |
| ELECTRONIC RELEASE FOR CIRCUIT BREAKER | 1997 |
|
RU2185017C2 |
| ARRANGEMENT FOR PROTECTING THREE-PHASE ELECTRIC EQUIPMENT FROM ASYMMETRIC ARC SHORT-CIRCUITING | 0 |
|
SU723715A1 |
| DEVICE FOR CURRENT FAULT PROTECTION IN A.C.NETWORK | 0 |
|
SU1267522A1 |
| DEVICE FOR PROTECTING THREE-PHASE ELECTRIC INSTALLATION AGAINST OPEN PHASE | 0 |
|
SU1117766A1 |
| LOAD OVERVOLTAGE PROTECTIVE GEAR | 2002 |
|
RU2241294C2 |
| ELECTRONIC OVERCURRENT RELEASE DEVICE FOR PROTECTIVE CIRCUIT BREAKERS | 2011 |
|
RU2550355C2 |
| 0 |
|
SU542343A1 | |
| ARRANGEMENT FOR PROTECTING AC CIRCUIT FROM DAMAGE | 0 |
|
SU636735A1 |
