S
LOW
O
PERATION
FOR
M
AINTENANCE
P
URPOSES
REV7
/REV3
OI 250 (EN)
146
A6
Slow Operation for Maintenance Purposes
Introduction
These instructions describe the following manual operations:
• Executing a slow closing operation
• Executing a slow opening operation
Manual operations in accordance with these instructions are not
necessary during installation work and during normal breaker ope-
ration.
Slow closing or opening operations can be used for setting, adju-
sting and checking the circuit breaker, if necessary.
After improper manipulations or when there are problems with the
breaker, it may be necessary to close or open the breaker slowly
and discharge the closing spring manually in order to eliminate a
problem or fault.
Safety Precautions
Stored-energy spring mechanisms have been designed according
to the state of the art and are safe and reliable. Nonetheless, these
devices can be hazardous if operated improperly.
The circuit breaker operator must therefore ensure that all person-
nel working on the equipment will meet the following requirements:
• Technical knowledge regarding local and national safety and
accident prevention regulations, especially for high voltage
systems and devices
• Knowledge of and compliance with the contents of this document
• Professional training in the area of circuit breakers and stored-
energy spring mechanisms
• Compliance with the safety instructions displayed on the device
• Agreement to report immediately any changes that may
compromise safety
Requirements for Executing Manual Operations
• The circuit breaker is in the open position.
• The circuit breaker is grounded (earthed) at both ends.
• The control voltage is turned off.
Содержание GL 311 F3/4031 P/VE
Страница 2: ......
Страница 10: ...INTRODUCTION 10 146 OI 250 EN REV7 REV6...
Страница 12: ...SAFETY 12 146 OI 250 EN REV7 REV3...
Страница 48: ...INSTALLATION 48 146 OI 250 EN REV7 REV7...
Страница 80: ...INSPECTION AND MAINTENANCE 80 146 OI 250 EN REV7 REV3...
Страница 102: ...RECONDITIONING 102 146 OI 250 EN REV7 REV7...
Страница 104: ...END OF LIFE MANAGEMENT 104 146 OI 250 EN REV7 REV2a...
Страница 114: ...SPECIAL EQUIPMENT OPTIONAL 114 146 OI 250 EN REV7 REV0...
Страница 128: ...REPLACEMENT PARTS AND ACCESSORIES 128 146 OI 250 EN REV7 REV6...
Страница 130: ...HANDLING USED SULFUR HEXAFLUORIDE 130 146 OI 250 EN REV7 REV2...