SMS ISKRA MT375 - Power Quality

Mx37y_Technical_Description_ENG_v2.00.doc
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Mx37y
─ Single- and three-phase electronic meters with built-in DLC
modem, GSM/GPRS modem or RS485 comm. interface
5.15. Load-profile configuration of G-
meter
Remote configuration of information saved in profiles
of individual customers and/or a larger number of
customers.
Load-profile configuration enables setting of capture
period and capture objects of Load-profile period 1
and Load-profile period 2.
5.16. Power quality
The meter records events and duration of the power
quality parameters.
(L1, L2, L3) - Level 1, U > +10%
(L1, L2, L3) - Level 2, +5% < U < +10%
(L1, L2, L3) - Level 3, 0% < U < +5%
(L1, L2, L3) - Level 4, -5% < U < 0%
(L1, L2, L3) - Level 5, -10% < U < -5%
(L1, L2, L3) - Level 6, -15% < U < -10%
(L1, L2, L3) - Level 7, U < -15%
TERMINOLOGY U TIME
Voltage Dip 1%<U<90% 10 ms – 1 Min
Voltage
disconnection
1%<U<90% > 1 Min
Temporary Over
Voltage
>110% 10 ms – 1 Min
Over Voltage >110% > 1 Min
5.17. Power failure registration
Power failure registration is collection of power failure
duration information of individual customers and/or a
larger number of customers.
COSEM Objects
Power Failure Counter
Phase L1 Failure Counter
Phase L2 Failure Counter
Phase L3 Failure Counter
Long Power Failure Counter
Phase L1 Long Failure Counter
Phase L2 Long Failure Counter
Phase L3 Long Failure Counter
Long Power Failures in any Phase Counter
Power Failure Time
Phase L1 Failure Time
Phase L2 Failure Time
Phase L3 Failure Time
Long Power Failures in any Phase Time
Power Failure Duration
Phase L1 Failure Duration
Phase L2 Failure Duration
Phase L3 Failure Duration
Long Power Failures in any Phase Duration
Long Power Interruption Log
TERMINOLOGY U TIME
Short power
failure
<1% 10 mSec – 5 Sec
Long power failure <1% > 5 Sec
The meter has implemented four (4) groups of objects
to count power failures, measure their durations and a
special event log to log the last 10 long power failures.
There is possibility to process four types of power
failures:
 Power failure on phase L1
 Power failure on phase L2
 Power failure on phase L3
 Power failure on ALL phases
 Power failure on ANY phase
When power failure occurs in one phase, the meter
updates “Power failure logging” registers related to
that phase and registers named “ANY”. The counters
for the total number of power failures corresponding to
that phase and registers “ANY” phase are
incremented. Time of power failure occurrence is
stored to corresponding phase and “ANY” phase
register. When power is returned, the meter calculates
duration of the last power failure. If calculated duration
is less than 3 minutes, the power failure is declared as
brief power failure. Power failures longer than 3
minutes are counted as long power failures and
occurrence of such power failure is recorded in “Power
Failure Log”. The log capacity is 10 records.
“Power Failure Log” is instance of the COSEM class
“Profile generic”. New record is inserted to the log
only in cases when duration of power failure on ANY
phase is longer than 3 minutes. Objects captured to
the buffer are:
 Time stamp of the record (end of power failure),
 Time of power failure in any phase,
 Duration of failure in any phase.
5.18. Alarms
The meter detects internal alarms and sends them to
the central system. The alarm parameters are
predefined. The priority levels of alarms are
adjustable. If an alarming situation has occurred, the
alarm is handled by the system and reset if
necessary.
COSEM Objects
Auto dial
Alarm ON status
Alarm ON operations
Alarm OFF status
Alarm OFF operations
Power Failure Alarm Filtering Limit
Power Failure Alarm ON Delay
Power Failure Alarm OFF Delay