User Manual

EMpro - multi-functional energy measuring devices for front panel installation
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PHOENIX CONTACT 108904_en_00
Numerous parameters that are important for operating an electrical system are determined
by means of the voltages and currents measured by the EMpro energy measuring devices.
Apparent power, active power and reactive power are measured in all four quadrants (con-
sumption, supply).
EMpro energy measuring devices have an integrated web server. It enables:
– Convenient configuration
– Data logging
– Mains quality evaluations
– Detailed recording of energy flows
A configurable digital input and a configurable digital output are also available. Communi-
cation interfaces to higher-level control systems are integrated in the device, depending on
the type.
Currents can be measured with current transformers or Rogowski coils. If you use Rogowski
coils, you do not need an external measuring transducer. EMpro energy measuring devices
can be connected directly to Rogowski coils from any manufacturer. Different device types
are deployed depending on whether current transformers or Rogowski coils are used. Volt-
ages can be measured directly, or by means of voltage transducers.
Voltages and currents are measured using the principle of true r.m.s. value measurement
(TRMS) up to the 63rd harmonic, which enables detailed assessment of the mains quality.
When EMpro energy measuring devices with LC display are used, it is possible to locally
display measurement values and perform configuration tasks locally by means of buttons.
All EMpro energy measuring devices have a Modbus communication interface and an inte-
grated web server. Other communication interfaces are available, depending on the type.
Via the web server, all relevant measurement values and parameters can be displayed and
the energy measuring devices can be configured. On the web interface, settings can be
configured for the following, among others:
– Grid types
– Average values
– Four energy meters for apparent power, active power, reactive power, consump-
tion/supply
– Energy tariff meter
– Logging
– Alarms and behavior in the event of alarms
– Network (TCP/IP)
– Interfaces with higher-level control systems
– Digital output (with logic functions)
– Digital input
– Impulse counter
– Date/time (realtime clock, SNTP compatible)
– Identifier (of metering point)
– Display