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Universal Remote Control MX-880Z - SPECS SHEET Informacje Techniczne Strona 30

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™
© 2000–2014 Schneider Electric
All Rights Reserved
Masterpact™ NT and NW Universal Power Circuit Breakers
Micrologic™ Electronic Trip Systems
30
05/2014
Metering
The Micrologic P trip unit calculates in real time all electrical values V, A, W, VAR, VA, Wh, VARh,
VAh, Hz, power factor, and crest factor. The Micrologic P trip unit also calculates demand current and
demand power over an adjustable time period.
Real-Time Metering: The value displayed on the screen is refreshed every second. Minimum and
maximum measurement values are stored in memory.
Demand Metering: The demand is calculated over a fixed or sliding time window that can be
programmed from five to 60 minutes. Depending on the contract signed with the power supplier,
specific programming makes it possible to avoid or minimize the cost of overrunning the subscribed
power. Maximum demand values are systematically stored and time stamped.
Communication Network
Four wire Modbus, RTU, RS485—The communication network may be used to:
•
Remotely read parameters for the protection functions
•
Transmit all the measurements and calculated values
•
Signal the causes of tripping and alarms
•
Consult the history files and the maintenance indicator record
In addition, an event log of the last 100 events and a maintenance record, which is stored in the trip
unit memory but not available locally, may be accessed via the communication network.
The Modbus communication system is compatible with Powerlogic™ System Manager™ (SMS) software.
Event Log
The event log may be accessed by a remote computer via the communication network. All events are
time stamped and include:
•
Trips
•
Beginning and end of alarms
•
Modifications to settings and parameters
•
Loss of time
•
Overrun of wear indicators
•
Test kit connections
•
Counter resets
•
System faults (thermal self-protection, major fault and minor fault alarms)
Current
Metering
Maximum
Current
Voltage
Metering
Power
Metering
Frequency
Power
Demand
Type of Measurement Unit of Measurement Measurement Source
Current
I
RMS
I
AVERAGE
I
PEAK/√2
A
A
A
ØA, ØB, ØC or N
(ØA + ØB + ØC)/3
ØA, ØB, ØC or N
Voltage
V
RMS
V
RMS
V
IMBALANCE
V
V
%
(ØA–ØB), (ØB–ØC) and (ØC–ØA)
(ØA–N), (ØB–N) and (ØC–N)
V
RMS
Power
P, Q and S
EP, EQ and ES
Power factor
W, VAR, VA
Wh, VARh, VAh
Total
Total
Total
Frequency F Hz 50/60
Type of Measurement Unit of Measurement Measurement Source
Current I
DEMAND
A ØA, ØB, ØC or N
Power P, Q and S
DEMAND
W, VAR, VA Total
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