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Are the circuit breakers used in the Powerpact 4 panelboards adjustable.

The circuit breakers currently used in the Powerpact 4 panelboards have either adjustable or  fixed settings, see list below for further information.


Single pole
Single pole circuit breakers have fixed settings

Two pole
Two pole circuit breakers have fixed settings

Three or Four pole up to 160A*
Three or four pole circuit breakers up to 160A have adjustable thermal overload settings (Ir) adjustable between 70 - 100% of their nominal rating (In)

Three or Four pole 200 & 250A*
Three or four pole circuit breakers rated at 200 & 250A have adjustable thermal overload settings (Ir) adjustable between 70 - 100% of their nominal rating (In) and adjustable magnetic settings adjustable between 5 to 10 x In.

Three or four pole 400 to 630A
These circuit breakers are fitted with electronic trip units and have adjustable overload settings between 40 - 100% of their nominal rating (In) and adjustable short circuit settings adjustable between 1.5 - 10 of the resultant overload setting.

Three or four pole 800 to 1600A
These circuit breakers are fitted with electronic trip units and have adjustable overload settings between 40 - 100% of their nominal rating (In) and adjustable short circuit settings adjustable between 1.5 - 10 of the resultant overload setting. They also have adjustable time delays for overload and short circuits.


Note:
* The current range of MGP... thermal magnetic circuit breakers are based on the NSX MCCB. MGP..... circuit breakers produced before around the middle of 2009 were based on the NS range of MCCB's which had adjustable thermal overload settings of 80 - 100% of their nominal rating (In). 
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