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3. Instrument description
The EM-PQ 2300 Power Quality Analyzer is a useful addition to the FRAKO range of products. It offers the
possibility of carrying out long-term network analyses in compliance with EN 50160 or EN 61000-2-4, monitoring
short supply network sags and performing TN-S system measurements. Harmonics up to the 51st are measured.
The user can select from several options for recording data, e.g. for analysis of the power demand profile over
time.
An outstanding feature is the possibility to acquire measurement data from the neutral conductor N, and
even more importantly from the earth conductor PE, in addition to the three phases L1, L2 and L3. Voltage
and current can be measured in all conductors.
Measurement readings, graphs, alarms and waveforms can be viewed on the optional EM-FD 2500 Display
instrument, which can show data from up to seven EM-PQ 2300 or other suitable instruments of the FRAKO
Energy Management System. The devices whose data are to be displayed are selected using the keys on the
EM-FD 2500 to navigate a menu.
The EM-PQ 2300 Power Quality Analyzer has a DIN rail mounted casing with plug-in connectors for simple
installation and connection to suitable individual instruments of the FRAKO Energy Management System.
Installation can be further simplified with the optional
DIN rail bus connector
,
which can be obtained from the manufacturer,
Phoenix Contact
,
with the order
code
HBUS 161,6-16P-1S BK, Article No. 2278555.
This enables the bus
connections of the EM-PQ 2300 Power Quality Analyzer or EM-MC 2200
Maximum Optimizer instruments mounted next to each other on the same DIN
rail to be automatically connected to each other. It is therefore no longer
necessary to wire these connections separately from instrument to instrument,
significantly reducing the costs of installation.
The instruments are connected to the:
-
FRAKO Starkstrombus
-
Display bus, including the Display instrument power supply
Figure 2: DIN rail bus connector
3.1 Connections
The EM-PQ 2300 Power Quality Analyzer has the following connections:
Inputs
5 voltage measurement inputs for L1 / L2 / L3 / N / PE (or free for other uses)
5 current transformer measurement inputs for L1 / L2 / L3 / N / PE (or free for other uses)
4 S0 pulse inputs for tariff switching, triggering synchronized energy metering with power supplier,
acquisition of pulse signals, alarms and statuses
Pt100 or Pt1000 temperature input in 4-wire or 2-wire configuration
Outputs
1 alarm contact
2 digital outputs programmable either as:
- Pulse contact to output 2 energy readings or
- Status contact to output alarm signals
2 analogue outputs to output any 2 desired measurements as 0
–20 mA, 4–20 mA or 0–10 V signals
Interfaces
RS-485 bus, FRAKO Starkstrombus® protocol for connection to the FRAKO Energy Management
System
Ethernet (RJ45 port) with the following functions:
- FTP downloading (for measurement protocols)
- FRAKO Starkstrombus® via Ethernet for this instrument (for FRAKO internal
communications).
- Alternatively Modbus TCP
- The internal alarm system can transmit e-mails via Ethernet or access text messaging (SMS) services.
Transmission rate 10 Mbit/s or 100 Mbit/s.
Display bus (CAN bus) for connecting the optional EM-FD 2500 Display instrument
3.2 LEDs
The six LEDs on the EM-PQ 2300 have the following functions:
