Servicing Schedule

DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH In case of frequent condensation or air pollution (dust, smoke, or corrosive gases), the maintenance intervals must be adapted to the actual conditions. Failure to follow these instructions will result in death or serious injury.

We recommend performing a visual inspection of the panels at least every four years, depending on the strain to which they are subjected during operation and the operating conditions.

For cleaning and maintenance work, refer to Access to the Main Circuit Compartments, Access to the cable compartment, switching device compartment and the busbar compartment in Installation Manual (GEX2564100).

In case of ambiguities or irregularities, contact the manufacturers service center immediately.

Circuit Breaker Switch Cubicle / Mainly recommended for maintenance activities

Preventive maintenance activities	Minimal frequency⁽¹⁾ / Performance level
	Y1	Y2	Y3	Y4	Y5	Y6	Y7	Y8	Y9	Y10
LV Compartment
Inspection of auxiliaries equipment	●	●	●	●	●	●	●	●	●	●
Inspection of wiring connections (tightening, fixing)	●	●	●	●	●	●	●	●	●	●
Cubicle
Cleaning cubicle / internal equipment	●	●	●	●	●	●	●	●	●	●
Inspection of the position indicators and signalling micro switches	●	●	●	●	●	●	●	●	●	●
Inspection of locking + interlocking mechanism function		○		○		○		○		○
Inspection of withdrawal mechanism		○		○		○		○		○
Inspection of the shutters		○		○		○		○		○
Cleaning / checking switch line operating mechanism				◙				◙
Cleaning / checking of isolators (tightening, chalking, cracking, signs of heating)				◙				◙
Cleaning / checking of earthing switch operating mechanism				◙				◙
Cleaning / checking / greasing of earthing switch plugs				◙				◙
Cleaning / checking / greasing of shutter locking system				◙				◙
Cables compartment
Inspection of cables (chalking, signs of heating)	○	○	○	○	○	○	○	○	○	○
Inspection of wiring connections (tightening, fixing)	○	○	○	○	○	○	○	○	○	○
CT / VT compartment
Cleaning / inspection of isolators (chalking, cracking, signs of heating)				◙				◙
Cleaning / inspection of TPs (tightening, chalking, cracking, signs of heating)				◙				◙
Busbar compartment
Inspection of busbars (cleaning, tightening, chalking, cracking, signs of heating)				◙				◙
Inspection of isolator switches (cleaning, tightening, chalking, cracking, signs of heating)				◙				◙
Circuit breaker
General state: visual checking, cleanliness, insulator condition, oxidation, no corrosion of supporting structure	●	●	●	●	●	●	●	●	●	●
Checking of number of operation	●	●	●	●	●	●	●	●	●	●
Cleaning of resin bodies	●	●	●	●	●	●	●	●	●	●
Inspection of state of the auxiliaries contact (on/off, rack in, rack off etc.)	●	●	●	●	●	●	●	●	●	●
Inspection of functional and safety interlock on device	●	●	●	●	●	●	●	●	●	●
Cleaning / checking / greasing of the power contacts (plugs, sliding contact, light greasing)				◙				◙
Measurement of main contact resistance (microhmeter)				◙				◙
Cleaning / checking / greasing of the moving withdrawable parts				◙				◙
Checking of coupling rods				◙				◙
Cleaning / checking / greasing of the operating mechanism				◙				◙
Cleaning / checking / greasing of the latching mechanism				◙				◙
Cleaning / checking / greasing of the closing and opening springs				◙				◙
Cleaning / checking / greasing of the motor and reduce				◙				◙
Cleaning / checking / greasing of all linkages				◙				◙
Check LV electrical wiring connections				◙				◙
Tests
Mechanical (manual on/off)	●	●	●	●	●	●	●	●	●	●
Electrical (remote on/off)	●	●	●	●	●	●	●	●	●	●
Associated protection
Inspection of protection relay (setting, tripping functions)				◙				◙
Inspection of upstream / downstream selectivity				◙				◙
Schneider Electric Proprietary Diagnosis services offers
Diagnosis to detect drifts from the initial state and significant trends, to anticipate on the corrective action (future failures) required to ensure equipment safety and continuity of service, and plan the action for the most convenient time for customer operations.
ProDiag Breaker Monitors opening / closing / spring-loading operations drifts				◙				◙
Checking / adjusting of condition of the damper and / or stop device				◙				◙
Checking of opening / closing times and speeds				◙				◙
Checking of charging time				◙				◙
Checking of contact synchronization				◙				◙
Checking of safety to close (overtravel and stabilisation)				◙				◙
Checking of safety to open (overtravel and stabilisation)				◙				◙
ProDiag Corona Surface or internal partial discharges detection.				◙				◙
Spare Parts
Secure: Parts commonly used in corrective maintenance interventions
Relay, LV Fuse	Light maintenance
Auxiliary contact	Light maintenance
Tripping coil	Light maintenance
Mitop for switch	Light maintenance
Undervoltage coil		Advanced maintenance
Motor		Advanced maintenance
Prevent: Parts whose condition are checked in preventive maintenance interventions
Gear motor				Exclusive maintenance
Operating mechanism				Exclusive maintenance
Life extension: Parts to extend the life of the equipment
Capacitive insulator		Advanced maintenance
Earthing clusters		Advanced maintenance
(1) Recommended under optimal operating conditions. However this recommended frequency should be increased according to a) the level of criticality (low, major, critical) and b) the severity of environment conditions (for example, corrosive, naval, offshore) following the prescriptions of manufacturer’s services.
◙ Exclusive maintenance conducted by ED equipment manufacturer only.
○ Advanced maintenance, preferably conducted by ED equipment manufacturer or manufacturer certified partner.
● Light maintenance, conducted by ED equipment manufacturer or customer competent technician.
Schneider Electric ranges covered by this Maintenance guide: MCset, EasySet MV, SM6, Fluokit, VM6, Fluair, DNF, Alliance. Does not supersede the information provided in the product user guide.

Metering Cubicle / Mainly recommended for maintenance activities

Preventive maintenance activities	Minimal frequency⁽¹⁾ / Performance level
	Y1	Y2	Y3	Y4	Y5	Y6	Y7	Y8	Y9	Y10
LV Compartment
Inspection of connections	●	●	●	●	●	●	●	●	●	●
Checking of wiring	●	●	●	●	●	●	●	●	●	●
Equipment compartment
Cleaning / checking of active part and enclosure (chalking, cracking, signs of heating)	○	○	○	○	○	○	○	○	○	○
Cleaning / checking of isolators (chalking, signs of heating)	○	○	○	○	○	○	○	○	○	○
Checking of lock and inter-lock system	○	○	○	○	○	○	○	○	○	○
Checking of auxiliaries contacts position indicator	○	○	○	○	○	○	○	○	○	○
Cleaning / checking of operating mechanism				◙				◙
Cleaning / checking of the earthing switch operating mechanism				◙				◙
Fuses
Inspection of fuse (chalking, color, cracking, corrosion)	○	○	○	○	○	○	○	○	○	○
Inspection of fuse fixing	○	○	○	○	○	○	○	○	○	○
Inspection of fuse signaling microswitch	○	○	○	○	○	○	○	○	○	○
Inspection of fuse striker	○	○	○	○	○	○	○	○	○	○
Busbar compartment (power off)
Inspection of busbars (signs of heating)				◙				◙
Inspection of isolator switches (chalking, signs of heating)				◙				◙
CT / VT compartment
Cleaning / inspection of isolators (tightening, chalking, cracking, signs of heating)				◙				◙
Cleaning or/ inspection of TPs (tightening, chalking, cracking, signs of heating)				◙				◙
Tests
Mechanical (manual on/off)	●	●	●	●	●	●	●	●	●	●
Electrical (remote on/off)	●	●	●	●	●	●	●	●	●	●
Schneider Electric Proprietary Diagnosis services offers
Diagnosis to detect drifts from the initial state and significant trends, to anticipate on the corrective action (future failures) required to ensure equipment safety and continuity of service, and plan the action for the most convenient time for customer operations.
ProDiag Corona Surface or internal partial discharges detection.				◙				◙
ProDiag Fuse Measurement of fuses internal impedance / comparison with manufacturer's data				◙				◙
Spare Parts
Secure: Parts commonly used in corrective maintenance interventions
Auxiliary contact	Light maintenance
Prevent: Parts whose condition are checked in preventive maintenance interventions
Operating mechanism				Exclusive maintenance
Life extension: Parts to extend the life of the equipment
Capacitive insulator		Advanced maintenance
Earthing and fuses cluster		Advanced maintenance
MV Fuse (ProFusion maintenance)		Advanced maintenance
(1) Recommended under optimal operating conditions. However this recommended frequency should be increased according to a) the level of criticality (low, major, critical) and b) the severity of environment conditions (for example, corrosive, naval, offshore) following the prescriptions of manufacturers services.
◙ Exclusive maintenance conducted by ED equipment manufacturer only.
○ Advanced maintenance, preferably conducted by ED equipment manufacturer or manufacturer certified partner.
● Light maintenance, conducted by ED equipment manufacturer or customer competent technician.
Schneider Electric ranges covered by this Maintenance guide: MCset, EasySet MV, SM6, Fluokit, VM6, Fluair, DNF, Alliance. Does not supersede the information provided in the product user guide.