EC500 Controller Handbook
Copyright © 2019 Eaton Corporation. All Rights Reserved.
Issue A March 2019
Page 40 of 107
Parameter
Description
Where to find:
will start forcing rectifiers to sleep mode till rectifier
load increases to “Maximum Load threshold”.
Home> Settings >Rectifier
Settings >Eco Mode
Maximum Load
Load percentage (of rectifier capacity). If rectifier
load is above this threshold the Economy mode logic
will start enabling rectifiers from sleep mode.
Sleep Sequence
Two sleep sequences are supported, Linear & Cyclic.
Cyclic Period
Duration after which a rectifier in sleep mode will be
made active and next rectifier put in sleep mode.
Operational only if cyclic sleep sequence is selected.
Operation
Economy mode logic, when enabled, monitors per rectifier current and if it is less than the
Minimum Load
setting and number of active rectifiers is more than
Minimum Active Rectifiers
setting, then it will put one
rectifier in sleep mode. This cycle is continuously repeated and next rectifier put in sleep mode till either load
current per active rectifier is more than
Minimum Load
setting
or number of active rectifiers is equal to or less
than
Minimum Active Rectifiers
setting
.
In case rectifier current becomes more than
Maximum Load
per rectifier setting or number of active rectifiers
becomes less than
Minimum Active Rectifiers
setting, logic will start enabling rectifiers one by one, till per
rectifier current is less than
Maximum Load
setting or all rectifiers have been enabled. Each cycle takes
approximately 1 minute.
The following two types of sleep and wake up sequences are provided:
Linear Sleep Sequence
If Linear Sleep Sequence is selected, the rectifiers are put in sleep in right to left direction i.e. the last rectifier
is put in sleep mode and then second to last and so on. Conversely the rectifiers are woken up in left to right
order. A rectifier in sleep mode remains in this mode unless changed by wake-up logic.
Cyclic Sleep Sequence
In this sequence, rectifiers sleep and wake-up in cyclic order in a clockwise direction. In diagram below, six
rectifiers are present; three rectifiers are active and the other three rectifiers are in sleep mode.
Cyclic process uses these variables:
•
cyclic index number
•
cyclic period.
At time t = 0, the cyclic index is one. Assume rectifier 4, 5 and 6 are active and rest are in sleep mode.
