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what is preventive maintenance? and what is predictive
maintenance? and what diffrence both?
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Answer Posted / kuldeep
PREDICTIVE MAINTENANCE-IS THE REGULAR MAINTENANCE WHICH IS
WE DONE IN MONTHALY BASIC
PREVENTIVE MAINTENANCE - IS THE MAINTENANCE WHICH IS WE DO
HALF YEARLY OR QUATERLY. IN THIS PERIOD WE DO IMPROVEMENT
IN THE MACHINE.
| Is This Answer Correct ? | 4 Yes | 15 No |
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When we use air circuit breaker, it has O/L protection ,time delay SC protection, Instataneous SC protection & ground fault protection. They all have some setting range. But what is the suitable/allowable setting for the above protection which will be safe for the equipment? For example-O/L protection setting have a range of (0.4,0.45,0.5,0.55,0.6,0.65,0.7,0.8,0.9,1.0)xIn Time delay SC protection have a range of (1.25,1.5,2,3,4,6,8,10,12)xIn Time delay setting is 0.02,0.1,0.2,0.3,0.4 Instataneous setting is fixed to 20xIn Gound fault setting is given 100A,300A,600A,900A,1200A This setting are for 2500A ACB. So what will be the basic allowable setting for the above protection? is there any formulae to calculate this<
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