- Required Running Time (Hours per year)
• Applied load (variable or constant)
• Overload Capability
( PS: Overload is not mentioned in Standards)
(due to transients extra power is available) - Implied changes with Rating
- Warranty
Continuous Power – COP
Applicable for supplying utility power at a constant 100% load for an unlimited number
of hours per year. No overload capability is available for this rating.
Some may even ask for 10% Overload. i.e 1010 kVA COP may require us to offer KTA50G8
Prime Power – PRP
Unlimited Time PRP:(8760 hr/yr less service)
Unlimited number of hours per year
Variable load
Not to exceed 70%
average of the PP rating during any operating period of 24 hours.
Limited Prime Power – LTP
limited number of hours 500 h/year
Non-Variable Load
applications at power levels never to exceed the Prime
Power rating. Any operation exceeding 500 hours per year should use the Continuous Power Rating
Emergency Standby Power – ESP
For supplying emergency power for the duration of a utility power failure.
Not to exceed 200 hrs/yr
Average load factor of 70% of the standby rating
No negotiated outage operations.
