ComAp InteliMains NT IM-NT, Справочное руководство

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InteliMains
NT
, SW version 3.2.0
InteliMains-NT-MCB-MGCB-3.2.0-Reference Guide.pdf,
©ComAp – April 2015
65
I
SLAND ENABLE
P
ARALLEL
E
NABLE
S
YNCHRO ENABLE
MFS
TART
S
HORT
D
ESCRIPTION
YES NO NONE NO

Island operation is possible.

Transfer with synchronization via
InteliMains is not possible

Gen-sets will not be started when the
Mains fails.
NO YES REVERSE NO

Parallel operation is possible.

Transfer with synchronization via
InteliMains is possible

Gen-sets will not be started when the
Mains fails.
NO YES NONE NO

Parallel operation is possible.
(Controller can transfer to Parallel
operation from Mains operation.)

Transfer with synchronization via
InteliMains is not possible

Gen-sets will not be started when the
Mains fails.
7.4 System start
There may be several reasons for system start. The most common are: pressing of Start button in
MAN mode, activation of BI R
EM START
/
STOP
in AUT mode, AMF in MAN or AUT mode, activation of BI
T
EST ON LOAD
in TEST mode, power management in AUT mode and other reasons. Below there is
description of power management initiated start of the system.
In the following section there is a description of system with several gen-sets and IM-NT controlling
MCB and MGCB (see the lower diagram on the page 6). All gensets are taking part in power
management (
Pwr management: Pwr management = ENABLED)

Power management is set to Abs(kW)
– for Abs(kVA) same setpoints are used, for Rel(%)
setpoints Pwr management: #%LdResStrt and Pwr management: #%LdResStop are used.

In Island operation IM-NT will not close MGCB untill sufficient nominal power (given by
formula below) is reached (i.e. untill sufficient number of gen-sets with according nominal
powers are running).
E
XAMPLE
:
First set of Pwr management: #LoadResStrt/Stop setpoints is used -
Pwr management: #LoadResStrt 1 = 300, Pwr management: #LoadResStop 1 = 500
There are 4 gensets, all with nominal power 100 kW. When Mains failure occurs (i.e. system
goes to the Island operation mode) S
YSTEM START
/
STOP
is activated for all gensets and all
gensets are starting because they need to fullfill load reserve 300 kW (supposing non zero
load, such reserve is fullfiled only when all four gensets are running).
If Pwr management: #LoadResStrt 1 is set to 299, only three gensets will be started when
Mains failure occurs before MGCB closes. The formula which determines how many gensets
will be started is show below:
𝑁𝑜𝑚𝑖𝑛𝑃𝑜𝑤𝑒𝑟
𝑟𝑢𝑛𝑛𝑖𝑛𝑔
>
⏞
!
#𝐿𝑜𝑎𝑑𝑅𝑒𝑠𝑒𝑟𝑣𝑒𝑆𝑡𝑟𝑡 𝑋

After MGCB closing power management is functioning accordingly to the description below.

Different load reserve sets may be used for starting of the system and for its usual run (e.g.
selection of second load reserve set may be conditioned by MGCB
FEEDBACK
). It is particularly