A protection relays, metering 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 protection relays, metering fails. This page gives the schedule used in the PlantOps360 task library for protection relays, metering (and control panels (relay room), which follows common industry practice for general-purpose equipment. It is also searched for as relay, protection relay, numerical relay, distance relay.
The maker’s manual and your site safety procedures always come first where they differ. Intervals set by law differ by state.
Protection relays, metering preventive maintenance schedule and checklist
| How often | Task | Estimated time |
|---|---|---|
| Monthly | Check relay displays, alarms and trip counters; check panel heaters and lamps | 30 min |
| Quarterly | Check trip circuit supervision, the DC supply and communication status | 60 min |
| Half-yearly | Check DC earth fault and the battery charger; download event and disturbance records | 120 min |
| Annual | Relay test with a secondary injection kit against settings; update the records | 360 min |
| Annual | Review relay settings and co-ordination after plant changes; back up the settings files | 120 min |
Protection relays, metering maintenance frequency and yearly workload
At the estimated times, one protection relays, metering needs about 22 hours of preventive maintenance a year. The biggest single job is “Relay test with a secondary injection kit against settings; update the records” 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 |
|---|---|---|---|
| Monthly | 1 | 30 min | 6.0 h |
| Quarterly | 1 | 60 min | 4.0 h |
| Half-yearly | 1 | 120 min | 4.0 h |
| Annual | 2 | 480 min | 8.0 h |
What goes wrong on a protection relays, metering without preventive maintenance
- Relay or trip circuit faults
- DC supply and battery charger problems
- DC earth faults
- Settings changed without records
What to watch between services
- Relay alarms and trip counters
- Trip circuit supervision
- DC supply and earth fault indication
Safety and statutory notes for protection relays, metering maintenance
Test protection at the interval of your standard and keep the settings records. Never leave a protection disabled.
Where a protection relays, metering preventive maintenance schedule is used
This equipment is used in the industries below. Each link opens the preventive maintenance schedule guide for that industry, and the maintenance software page where we have one.
- Preventive maintenance schedule for chemical, fertiliser and petrochemical plants · maintenance software for chemical
- Preventive maintenance schedule for steel, foundry, forging and metal plants · maintenance software for steel and metals
- Preventive maintenance schedule for cement, glass, ceramics and building materials plants · maintenance software for cement
- Preventive maintenance schedule for mines and mineral processing plants · maintenance software for mining
- Preventive maintenance schedule for oil, gas and refinery facilities · maintenance software for oil and gas
- Preventive maintenance schedule for thermal and hydro power plants · maintenance software for power plants
- Preventive maintenance schedule for solar, wind and renewable energy plants · maintenance software for renewable energy
- Preventive maintenance schedule for water and wastewater utilities
- Preventive maintenance schedule for railways, metro, airports and depots
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Browse the full list of equipment preventive maintenance schedules (317 types).
Run this protection relays, metering 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 a protection relays, metering be serviced?
In our schedule a protection relays, metering has 5 tasks: 1 monthly, 1 quarterly, 1 half-yearly, 2 annual. The biggest job is “Relay test with a secondary injection kit against settings; update the records”, which is done annual. Always follow the maker’s manual where it gives a different interval.
What is included in protection relays, metering preventive maintenance?
It covers routine checks and jobs such as “Check relay displays, alarms and trip counters; check panel heaters and lamps”, “Check trip circuit supervision, the DC supply and communication status”, “Check DC earth fault and the battery charger; download event and disturbance records”, up to the annual overhaul or inspection. The full list with times is in the table above.
How many hours of maintenance does a protection relays, metering need per year?
About 22 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 protection relays, metering 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.