What do I need to consider while selecting a new RM6 configuration?
RM6 configurations have many possible combinations as follows:
Standard combinations (see attached page; RM6 standard combinations),
Free combinations (see attached page; RM6 free combinations and 5 functions options), and
5 functions combinations (see attached catalog page; RM6 free combinations and 5 functions options)
In order to efficiently design your RM6 configurations, simply follow the below steps:
Start by your customer's S.L.D (single line diagram); see how many busbar sections and switching/metering/protection functions you have.
Determine the customer need for future extensions and civil engineering limitations (e.g. need no future extension, right extension or from both sides).
Start selecting the maximum number of functions from the "standard combinations" as these provides optimal performance & dimensions.
If applicable, make use of the 5 functions combinations,
In case you did not find a combination from the above matching your requirements, start looking at the "free combinations" in order to fill the gaps in your configuration
Evaluate the alternatives; the best design you reach should be using minimum number of units, most compact dimensions & minimum number of extension kits (in case RE, LE or DE units are used).
Customer need: one line-up (bus section) with 2 x switch (I function) & 2 x transformer circuit breaker (D function) with double extension possibility for the overall switchboard.
Applying above steps systematically we have:
One bus section; 2 x I + 2 X D functions,
DE (double extensible) type is required by customer,
Looking at "Available functions" we cannot find a standard combination for DIDI with double extension,
As only four functions required, it is not applicable to use 5 functions combination,
Looking at "free combinations" we can see it is only possible to configure either 2 functions or 3 functions combination!
Evaluating our alternatives we can use then:
Alternative (1): Using standard combinations & extension kit as follows:
1 x Standard combination DE-IDI
1 x Standard combination DE-D + Extension kit to be joined with above unit
Alternative (2): Using only Free combinations & extension kit as follows:
1 x Free combination DE-DI
1 x Free combination DE-DI + Extension kit to be joined with above unit
Alternative (3): Using mix between standard and free combinations & extension kit as follows:
1 x Free combination DE-IDI + Extension kit to be joined with above unit
1 x Standard combination DE-D
Now evaluating our alternatives above we find all are using 1 x switchboard extension kit,
Now looking at the overall length (dimensions) of our switchboard we obtain:
Alternative (1): L = 1246 + 632 = 1878mm
Alternative (2): L = 1112 + 1112 = 2224mm
Alternative (3): L = 1592 + 632 = 2224mm
For review of dimensions you may use attached pages (dimensions) of the attached switchboard planning/configuration tool for RM6.
Conclusion: Most effective solution is to select in this case alternative (1) with DE-IDI (standard) + DE-D (standard) + Extension kit with optimum dimensions.