Installation Manual

NetSure™ LMS Data Processing Unit
Installation Instructions, Section 5879 (Issue BA, April 7, 2014)
Spec. No: 58650500, 586505500 Code: Section 5879
Model No: LMS1000 Issue BA, April 7, 2014
[108 of 149]
equipment to start. Also, the Sequencer Failsafe Timer and AC
Restoration Qualification Timer features can be configured. Each
rectifier/PCU controlled by the sequencer must be configured into
an Energy Management Channel, even if the energy management
software option is not installed. Refer also to the worksheets (or
copies of) located at the end of the Installation section as a guide
in programming the sequencing option.
Guidelines:
Note: Eighteen seconds are required for LMS1000 to detect the
change in the AC source and shut down the rectifiers/PCUs.
Standby AC should not be supplied to the power plant within
eighteen seconds of a commercial outage, and commercial AC
should not be supplied to the plant within eighteen seconds of
removing standby AC.
a. All rectifiers/PCUs are turned off when the "AC
Fail/Transfer" binary input changes state. The method of
operation is to have the "AC Fail/Transfer" input change
state first before the "Standby On/Proper Operate" input.
This turns the rectifiers/PCUs off before the standby
power is transferred to the loads and starts the fail-safe
timer.
b. Once the AC failure qualification period (15 seconds)
expires, the system determines if the AC Sequencer
activates. The AC sequencer starts when AC power is
restored. Rectifiers/PCUs will be sequenced on if the AC
sequencer is enabled, otherwise, all rectifiers/PCUs will
be turned on simultaneously. The recommended
method is to enable the AC sequencer to sequence the
rectifiers/PCUs. The system constantly monitors the
status of AC power and will start the AC sequencing
process when restoration of AC power is detected.
c. Once the Standby start delay expires, the system
determines if the Standby sequencer activates. If the
"Standby On/Proper Operate" input is in the proper state,
the Standby sequencer starts. Standby rectifiers/PCUs
(rectifiers/PCUs configured to be on when running on
standby power) will be sequenced on if the Standby
sequencer is enabled, otherwise all standby
rectifiers/PCUs will be turned on simultaneously. The
recommended method is to enable the Standby
sequencer to sequence the rectifiers/PCUs.
d. All rectifiers/PCUs are turned on and sequencing disabled
if the fail-safe timer expires before AC power is restored
or the start of Standby sequencing. The fail-safe time
should not be configured to be less than the Standby
start delay.
e. Sequencing starts with the rectifier/PCU connected to
energy management channel one, and proceeds in
numerical order. The energy management base
rectifier/PCU remains the same as it was prior to the
sequencer operation.
f. Each rectifier/PCU controlled by the sequencer must be
configured into an Energy Management Channel, even if
the energy management software option is not installed.
g. The timing involved in the operation of the rectifier/PCU
sequencing feature will be affected if the alarm delay
attributes for the binary channels selected to control the
sequencer are configured. Configuring the "On Delay" or
"Off Delay" for the AC Fail / Transfer input or Standby On /
Proper Operate input will postpone detection (signals
may have already been detected by the transfer device)
of an AC Failure or Proper Operate signal by the system
rectifier/PCU sequencing software.
Configuration Restrictions:
a. If the sequencer option is installed, a binary channel
number must be entered for "Standby On/Proper
Operate Input=".
b. If an AC fail or transfer circuit is not used, or does not
exist, the binary channel number entered for "Standby
On/Proper Operate Input=" must also be entered
for "AC Fail/Transfer Input=". "Input Type
(Fail or Transfer):" must also be set for "Fail".
PROCEDURE:
The sequencing feature, if provided, can be activated or disabled
by using the command SET SEQUENCE which is described below.
This command displays a header that contains the current
configuration information. Then, individually, the command lists
each item that can be changed, prompting for new or revised
information to be entered. If the current information does not
need to be changed, press
ENTER to continue. This command is
available to users programmed for access to level 6 commands.
1. After logging onto the system, type
SET SEQUENCE. Then
press
ENTER .
Command <6>: SET SEQUENCE
2. The system displays the default (or current) configuration
of the sequence option, followed by...
AC Sequencer on (Y or N):
3. Type
Y if it is desired to enable sequencing of all the
rectifiers/PCUs when AC power is restored. Type
N if
rectifier sequencing is not desired. Then press
ENTER .