Schweitzer Engineering SEL-351P, Quick Start Manual

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8-32 Breaker/Recloser Monitor, Battery System Monitor, Date Code 990215
Metering, and Load Profile Functions
SEL-351P Manual Técnico
L
OAD
P
ROFILE
R
EPORT
(O
NLY
A
VAILABLE IN
F
IRMWARE
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ERSIONS
1
AND
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At the interval given by load profile acquisition rate setting LDAR, the SEL-351P adds a record
to the load profile buffer. This record contains the time stamp, the present value of each of the
analog quantities listed in the load profile list setting LDLIST and a checksum. These settings
are made and reviewed with the SET R and SHO R serial port commands, respectively. LDAR
can be set to any of the following values: 5, 10, 15, 30, and 60 minutes. LDLIST may contain
any of the following labels.
LABEL QUANTITY RECORDED
IA, IB, IC, IN Phase and neutral current magnitudes
VA, VB, VC, VS Phase and sync voltage magnitudes
IG, I1, 3I2, 3V0, V1, V2 Sequence current and voltage magnitudes
FREQ Phase frequency
MWA, MWB, MWC, MW3 Phase and 3 phase megaWATTs
MVARA, MVARB, MVARC, MVAR3 Phase and 3 phase megaVARs
PFA, PFB, PFC, PF3 Phase and 3 phase power factor
LDPFA, LDPFB, LDPFC, LDPF3 Phase and 3 phase power factor lead/lag status (0 = lag,
1= lead)
IADEM, IBDEM, ICDEM, INDEM, IGDEM, 3I2DEM Demand ammeter quantities
MWADI, MWBDI, MWCDI, MW3DI Phase and 3 phase demand megaWATTs in
MWADO, MWBDO, MWCDO, MW3DO Phase and 3 phase demand megaWATTs out
MVRADI, MVRBDI, MVRCDI, MVR3DI Phase and 3 phase demand megaVARs in
MVRADO, MVRBDO, MVRCDO, MVR3DO Phase and 3 phase demand megaVARs out
MWHAI, MWHBI, MWHCI, MWH3I Phase and 3 phase megaWATT hours in
MWHAO, MWHBO, MWHCO, MWH3O Phase and 3 phase megaWATT hours out
MVRHAI, MVRHBI, MVRHCI, MVRH3I Phase and 3 phase megaVAR hours in
MVRHAO, MVRHBO, MVRHCO, MVRH3O Phase and 3 phase megaVAR hours out
Labels are entered into the setting, either comma or space delimited, but are displayed as space
delimited. Load profiling is disabled if the LDLIST setting is empty (i.e., set to NA or 0), which
is displayed as LDLIST = 0. The load buffer is stored in non-volatile memory and the
acquisition is synchronized to the time of day. When the buffer fills up, newer records overwrite
older records. The 040 data FLASH version of the SEL-351P is able to store at least 13 days of
data at an LDAR of 5 minutes, if all 15 values are used. If less than 15 values are specified, the
SEL-351P will be able to store more days of data before data overwrite occurs. Likewise, if the
interval is set larger, the SEL-351P will be able to store more days of data before data overwrite
occurs.
The load profile report is retrieved via the LDP command, which has the following format:
LDP [a] [b]
If the command is entered without parameters (i.e., LDP), the SEL-351P displays all records in
the load buffer. If the command is entered with a single numeric parameter [a] (i.e., LDP 10), the
SEL-351P displays the most recent [a] records in the buffer. If the command is entered with two
numeric parameters [a] [b] (i.e., LDP 10 20), the SEL-351P displays load buffer records [a]
through [b]. If the command is entered with a single data parameter [a] (i.e., LDP 7/7/96), the
SEL-351P displays all load buffer records for the specified date. If the command is entered with
two date parameters [a] [b] (i.e., LDP 7/7/96 8/8/96), the SEL-351P displays all load records
occurring from date [a] through date [b] inclusive.