An LT switchgear preventive maintenance schedule lists the checks and jobs done on the equipment at fixed intervals, how long each takes, and in what order of frequency, so problems are found before the LT switchgear fails. This page gives the schedule used in the PlantOps360 task library for LT switchgear (and distribution panels (pcc, acb, mccb), which follows common industry practice for general-purpose equipment. It is also searched for as LT panel, PCC, power control centre, ACB.
The maker’s manual and your site safety procedures always come first where they differ. Intervals set by law differ by state.
LT switchgear preventive maintenance schedule and checklist
| How often | Task | Estimated time |
|---|---|---|
| Weekly | Check indication lamps, meters and for abnormal noise or smell; check door interlocks | 15 min |
| Monthly | Clean panel and filters; check cooling fans and ventilation | 30 min |
| Quarterly | Check breaker operation and trip settings; check earth leakage protection by test button | 45 min |
| Half-yearly | Thermography of busbars and terminals under load | 90 min |
| Annual | Shutdown maintenance: tighten busbar and cable joints, clean, check contacts, test breakers and protection | 360 min |
LT switchgear maintenance frequency and yearly workload
At the estimated times, one LT switchgear needs about 31 hours of preventive maintenance a year. The biggest single job is “Shutdown maintenance: tighten busbar and cable joints, clean, check contacts, test breakers and protection” at 360 minutes, done annual. Multiply by the number of units you have to see the workload for your plant.
| Frequency | Tasks | Time per round | Hours per year |
|---|---|---|---|
| Weekly | 1 | 15 min | 13.0 h |
| Monthly | 1 | 30 min | 6.0 h |
| Quarterly | 1 | 45 min | 3.0 h |
| Half-yearly | 1 | 90 min | 3.0 h |
| Annual | 1 | 360 min | 6.0 h |
What goes wrong on an LT switchgear without preventive maintenance
- Loose or overheated connections
- Breaker mechanism wear
- Dust and moisture ingress
- Wrong trip settings
What to watch between services
- Thermal image of joints under load
- Breaker operation and trip settings
- Cooling fans and filters
Safety and statutory notes for LT switchgear maintenance
Open a live panel only under the permit and PPE of your electrical safety rules. Maintenance on ACBs and busbars needs isolation, proving dead and earthing.
Where an LT switchgear preventive maintenance schedule is used
An LT switchgear is found in almost every industry. The industry guides below show how it fits into the wider schedule of each one:
- Preventive maintenance schedule for pharmaceutical plants
- Preventive maintenance schedule for food, dairy and beverage plants
- Preventive maintenance schedule for automotive plants
- Preventive maintenance schedule for chemical, fertiliser and petrochemical plants
- Preventive maintenance schedule for cement, glass, ceramics and building materials plants
- Preventive maintenance schedule for steel, foundry, forging and metal plants
- Preventive maintenance schedule for textile and garment mills
- Preventive maintenance schedule for thermal and hydro power plants
See all industry preventive maintenance schedules.
Related equipment maintenance schedules
- Power / distribution transformer preventive maintenance schedule
- Dry-type / cast resin transformer preventive maintenance schedule
- HT switchgear preventive maintenance schedule
- Motor control centre preventive maintenance schedule
- APFC panel and capacitor banks preventive maintenance schedule
- Uninterruptible power supply preventive maintenance schedule
- Battery bank preventive maintenance schedule
- Flooded lead-acid preventive maintenance schedule
Browse the full list of equipment preventive maintenance schedules (317 types).
Run this LT switchgear schedule in maintenance software
In preventive maintenance software, each row above becomes a recurring task on the asset with its checklist, time estimate and parts. Tasks can be triggered by calendar date, running hours, meter readings or production cycles, each completed task is recorded with the person and date, and a failed check can open a work order. For the method behind it, read the guide to the preventive maintenance schedule, or use the free generator to get a 12-month plan for your whole equipment list.
Build my preventive maintenance schedule (free Excel)
Frequently asked questions
How often should an LT switchgear be serviced?
In our schedule an LT switchgear has 5 tasks: 1 weekly, 1 monthly, 1 quarterly, 1 half-yearly, 1 annual. The biggest job is “Shutdown maintenance: tighten busbar and cable joints, clean, check contacts, test breakers and protection”, which is done annual. Always follow the maker’s manual where it gives a different interval.
What is included in LT switchgear preventive maintenance?
It covers routine checks and jobs such as “Check indication lamps, meters and for abnormal noise or smell; check door interlocks”, “Clean panel and filters; check cooling fans and ventilation”, “Check breaker operation and trip settings; check earth leakage protection by test button”, up to the annual overhaul or inspection. The full list with times is in the table above.
How many hours of maintenance does an LT switchgear need per year?
About 31 hours per unit per year at the estimated times in our library, including all scheduled rounds. Use it to plan workload, not as a benchmark.
Is there a free LT switchgear maintenance checklist?
Yes. The table on this page is a ready checklist. The free preventive maintenance schedule generator turns it into a 12-month Excel schedule for your list of equipment, with monthly workload hours.