Entec EVR, Руководство пользователя

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EVR AUTOMATIC RECLOSER http://www.entecene.co.kr
24
EN
HANCED
TEC
HNOLOGY
1) If the gas pressure is above 0.1bar gauge, the filling of SF6 gas should be done directly with
attaching the gas handling equipment and fill upto the required pressure.
2) If the gas pressure is below 0.1bar gauge, a vacuum must be drawn out of the tank before filling
SF6 gas. Draw a vacuum of 10mbar, hold this vacuum for 15 min and fill upto the required
pressure (0.5bar gauge at 20
℃
).
The unit is capable of keeping basic impulse level with an SF6 gas rich environment at zero bar
gauge.
5.2.2. Battery check
Please press battery load test button in the control cubicle, battery voltage is displayed on LCD
panel.
1) Normal voltage: over 21V
2) Over discharged voltage: 15V~21V
3) Require to replacement: below 15V
If battery voltage shows below 15V, the battery should be replaced with new one.
5.2.3. Contact life of vacuum interrupter
The life of the vacuum interrupter is dependent upon the accumulation of the number of faults
interrupted and the magnitude of fault current.
Consequently, it is very important to record the short circuit operations.
If 10,000 operations have been exceeded or the LCD displayed in the control cubicle is indicated
below 20%, the vacuum interrupters may need to be replaced.
If the replacement of the vacuum interrupter is required, please consult with the manufacturer at
any time.
5.2.4. Resistance test on current carrying main circuit
Ensure that the recloser is in the closed position.
The electrical resistance of each phases should be determined by measuring voltage drop with a DC
current of 100 Amperes passing through.
The resistance measurement of any phases should not be exceeded over 20% compared with the
recommended value from the manufacturer.
5.2.5. High voltage insulation test
The recloser has been routine tested at the works in accordance with ANSI C37.60, 1981. It is
recommended that the 50/60
㎐
high voltage test should be carried out prior to energizing the
recloser for the first time.