Recommended Inspection Maintenance
Recommended Inspection Maintenance
Southern States’ disconnect switches are designed to operate with minimum maintenance. While
disconnecting switches are not readily serviced at frequent intervals,
periodic inspection is important for
satisfactory operation and maximized overall life
. Frequency of inspection and maintenance depends on the
installation site, weather, atmospheric conditions, experience of operating personnel, and any special
operation requirements.
During operational testing, the switch should be opened and closed several times, if possible, to clean the
contacts and free the moving parts. A visual inspection, when the switch is wet, or temperature scanning
detector may indicate hot spots that could serve as potential sources of trouble. Directional microphones or
ultrasonic detectors can be used to locate local corona sources on the switches which can be eliminated
during normal switch maintenance.
Tabl
e
: Recommended Installation & Maintenance Table
Installation
Tests
Patrolling
Inspection
6-months
Routine
5 Year *
Periodic
10 Year *
Insulators
Contamination
X
X
X
X
Damage
X
X
X
X
Cabinet (if motor
operator supplied)
Any loose parts on the floor of the
cabinet?
X
X
X
X
Wiring Secure
X
X
X
X
Links Secure
X
X
X
X
Inspect Mechanism for loose parts
X
X
X
X
Heaters Energized
X
X
X
X
Door Seal
X
X
X
X
Mechanical
Operational Tests
X
X
X
Electrical
Contact Resistance
X
X
X
Liveparts Inspection
Inspect Contacts
X
X
X
Inspect Arcing Horns
X
X
X
*
NOTE:
Inspection/maintenance is suggested to be performed every two (2) years when installed in harsh environments
with excessive airborne contaminants such as salt spray and industrial pollutants.
It is recommended that maintenance on these switches be performed in accordance with ANSI
STANDARDS
C37.30.1-2011
. In addition, well-established live-line servicing and maintenance
procedures may be used in accordance with user practices and local and OSHA regulations.
NOTE
