Portable power quality analyser - 4 voltage inputs and 4 current inputs - nominal current rate can be optionally selected in range 10-10000A (depends on actual probe). Communication options include USB, WiFi and GPRS

NEMO 304 is a portable multifunctional power meter and power analyser with datalogger functions. It is suitable for low, medium and high voltage networks (measured via voltage transformer). Its large internal memory can store months of typical measurements and also records disturbance data, log, electricity meter reading and other critically important information.

NEMO 304 shares many features with its predecessors SIMON and SMPQ but is designed in different - compact and portable enclosure. It supports measurement of current with flexible current probes. Each probe can set 4 different nominal AC measuring ranges. Flexible CT is simple for manipulation. 

1. Specifications
2. Downloads
3. Ordering
4. Software
5. Firmware options

Specifications and properties

four voltage inputs for measurement, separated power supply input

power supply 85-480 Vac / 100-600 Vdc or over USB, internal accumulator

4 current measurement inputs capable to connect the Bxxx current probe

one input for PT 100 temperature sensor

internal memory capacity 512 Mb

128 samples per period, aggregation 200 ms or higher (user defined)

voltage is sampled continuously, current semi-continuously depending on the nr. of active inputs

frequency, power (active, reactive, distortion), power factors

harmonic components (up to 50th, including angles, interharmonics , THD), flicker, unbalance...

records power quality events (dips, sags, swells)

optionaly records detailed event trends and oscillograms of the redefined events

power quality evaluation according to EN 50160

USB port for configuration and data acquisition, optionally wifi module for local communication

ENVIS 1.1 supports all features of NEMO instruments

internal battery backed real time clock

Typical wiring - schema

Related Documents

NEMO 304 - Operating Manual

NEMO 304 - Optional Accessories

Declaration of conformity for NEMO 332 and NEMO 304

Types and Accessories

NEMO 304 type ordering codes and optional accessories are displayed in the following diagram. 

NEMO 304: Supported flexible current probes.

NEMO 304 ordering codes and optional ccessories are displayed in the following diagram. 

ENVIS application suite provides all features for basic instrument management (configuration, supervision, fw update). It also downloads and archives data from all the supported instruments. import/export, data analysis and advanced reporting of the records is also provided. ENVIS is available free of charge to be used with all our instruments.

ENVIS.Online system service can be used to implement complex power quality monitoring and/or energy efficienci control and monitoring systems. By using email,  SMS or SNMP all registered users and administrators can be warned upon exeptional situations, malfunction of supply or monitored instruments or it can be used to post periodical analysis/reports.

Additional plugin modules can also add special features or customizations to booth ENVIS and ENVIS.Online in a modular manner. 

 

Optional firmware modules

Ripple Control (Mains) Signals - RCS Module: for measurement, recording and analysis of a ripple control signal. Several formats of the telegram are also supported for decoding.

Voltage Events - VE Module: for recording and evaluation of voltage events (SMVQ & SMPQ does include this feature in its default configuration).

General Oscillograms - GO module: for detection and precise recording of various waveform distortions. This module records the so called oscillograms of voltages and currents in extended detail, capacity and trigger options into the flash memory.

Modbus Master - MM module: in supported instruments with memory it activates new option to record Modbus data from connected slave devices. It can work as a datalogger to NOVAR PFCs as well as to local sub-meters or other Modbus sensors.

See: other data loggers, ENVIS 1.1 for data analysis, built-in meters and analysers.