FIELD: protection of load-carrying power networks and attending personnel; fire safety means. SUBSTANCE: protective gear has current transformer whose magnetic core is placed around power conductors of network under protection. Connected to transformer secondary winding is auxiliary current relay. High-frequency electromagnetic wave spectrum converter has current transformers whose magnetic cores are placed around each separate respective phase conductor of network under protection and associated relay responding to high- frequency current oscillations initiated by arcing of poor contacts or by electric arc through high contact resistance. Mentioned relay and auxiliary relay are coupled with automatic disconnection system through OR gate. Device lead-in is low-pass filter. EFFECT: improved reliability of protective gear. 6 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| DIFFERENTIAL CURRENT TRANSFORMER | 2015 |
|
RU2618168C2 |
| DEVICE TO PROTECT INSTRUMENT VOLTAGE TRANSFORMER FROM DAMAGE AT FERRORESONANCE PROCESSES IN INSULATED NEUTRAL NETWORK | 0 |
|
SU1772862A1 |
| FIRE PREVENTION METHOD IN ELECTRICAL NETWORK OR ELECTRICAL INSTALLATION AND DEVICE TO THIS END | 2006 |
|
RU2342711C2 |
| METHOD FOR DETERMINING INSTALLATION SITE FOR DEVICES FOR SECTIONALIZATION OF 380 V OVERHEAD LINE | 2016 |
|
RU2610899C1 |
| LOW-VOLTAGE SWITCHGEAR FOR EXPLOSION-PROTECTED MINE TRANSFORMER SUBSTATION | 0 |
|
SU1677729A1 |
| DISCONNECTING PROTECTIVE DEVICE | 2003 |
|
RU2247455C1 |
| DIFFERENTIAL CURRENT TRANSFORMER | 2003 |
|
RU2260865C2 |
| DEVICE FOR EARTHING TRANSFORMER NEUTRAL WIRE | 0 |
|
SU907683A1 |
| DIFFERENTIAL CURRENT TRANSFORMER | 2003 |
|
RU2244972C1 |
| OVERCURRENT PROTECTION DEVICE | 2022 |
|
RU2788993C1 |
