InteliMains
NT
, SW version 3.2.0
InteliMains-NT-MCB-MGCB-3.2.0-Reference Guide.pdf, ©ComAp – April 2015
7.6.3.1 Running hours equalization (RHE)
The gen-sets “engine priorities” are automatically swapped to balance engine running hours. In other
words, the controllers compare Run hours of each gen-set and select gen-set(s) to run in order to
maintain constant maximal difference of running hours. Up to 32 controllers are supported.
Activation: Pwr management: #PriorAutoSwap = RUN HOURS EQU
Important setpoints: RunHoursBase, #RunHrsMaxDiff, Priority ctrl, Control group
The actual values to be considered by the Running Hours Equalization are calculated from the
following formula:
RHE
i
= Runhours
i
- RunHoursBase
i
,
where RHE is considered value for Running hours equalization, i stands for a particular gen-set,
Runhours is a cumulative sum of run hours available in statistic values of the controller,
RunHoursBase is a setpoint. This setpoint may be used in the case of gen-sets with different runs
hours are intended to be set at the same initial point (e.g. a new gen-set and a used gen-set after
retrofit maintenance inspection).
The Running hours equalization function compares RHE value of each controller in the group. Once
the difference between RHE of individual controllers is higher than #RunHrsMaxDiff
(i.e. #RunHrsMaxDiff + 1), the gen-set(s) with the lowest is/are started.
MCB MGCB
GCB1
GCB2
GCB3
GCBn
InteliMains
Comms settings:
Contr. Addr = 4
Pwr management:
#PriorAutoSwap = RUN
HOURS EQU
Priority ctrl = MASTER
#RunHrsMaxDiff = 10h
Control group =
COMMON
Comms settings:
Contr. Addr = 1
Pwr management:
#PriorAutoSwap = RUN
HOURS EQU
Priority ctrl = SLAVE
RunHoursBase = 100h
#RunHrsMaxDiff = 10h
Control group =
COMMON
Comms settings:
Contr. Addr = 2
Pwr management:
#PriorAutoSwap = RUN
HOURS EQU
Priority ctrl = SLAVE
RunHoursBase = 200h
#RunHrsMaxDiff = 10h
Control group =
COMMON
Comms settings:
Contr. Addr = 3
Pwr management:
#PriorAutoSwap = RUN
HOURS EQU
Priority ctrl = SLAVE
RunHoursBase = 300h
#RunHrsMaxDiff = 10h
Control group =
COMMON
Comms settings:
Contr. Addr = n
Pwr management:
#PriorAutoSwap = RUN
HOURS EQU
Priority ctrl = SLAVE
RunHoursBase =0h
#RunHrsMaxDiff = 10h
Control group =
COMMON
CAN
n321
Figure: Running Hours Equalization example
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