Janitza UMG 604-PRO Power Quality Analyser

The Janitza UMG 604-PRO is a DIN-rail power quality analyser for three-phase networks up to 480 V line-to-line. It measures voltage, current, power and energy, analyses harmonics up to the 40th, and records transients longer than 50 µs, which makes it a practical choice for permanent monitoring of industrial feeders, switchgear and generator or UPS outputs.

Power quality recording on a six-module DIN-rail housing

The 604-PRO takes four voltage and four current inputs and samples at 20 kHz per phase. Janitza lists harmonics analysis, unbalance and THD-U/THD-I, positive, negative and zero sequence components, short-term interruptions above 20 ms, transient logging, start-up process and fault recorder functions, and a rotary field indication. Internal memory is 128 MB, and the device has two digital inputs and two digital/pulse outputs, plus a PT100/PT1000/KTY83/KTY84 temperature input.

Communication is by RS485, RS232 and Ethernet. The Ethernet port provides a Modbus gateway and an embedded web server, and the protocol list includes Modbus RTU, Modbus TCP, BACnet, SNMP, NTP, SMTP and FTP, so the device can feed a SCADA or building-management system and e-mail alarms. The Jasic programming option allows custom logic with 200 ms response time. The UMG 604-PRO is UL certified and the active-energy class is 0.5S with ../5 A transformers.

Technical specifications

Planning the installation

The 604-PRO measures 5 A secondary current directly, so most installations use current transformers with 5 A or 1 A secondaries and set the ratio in the device. Check the nominal voltage against the supply option on the nameplate, fuse the supply with a 6 A type B breaker as the datasheet requires, and fit voltage-measurement fuses of 1 to 10 A. For a simpler energy meter see the Janitza 96RM below, or compare with the published Janitza UMG 508 universal measuring device. More devices are listed under controllers and data acquisition.

How the Janitza UMG 604-PRO works

The UMG 604-PRO takes four voltage inputs and four current inputs from the network. It samples each phase at 20 kHz and turns the values into rms voltage, current, power, energy and harmonics up to the 40th. It also watches for sags, interruptions longer than 20 ms and transients longer than 50 microseconds, and it stores them in 128 MB of memory. Values are passed on by RS485, RS232 or Ethernet, using Modbus, BACnet and SNMP among others. The device can also act as a Modbus gateway.

Where the Janitza UMG 604-PRO is used

• Industrial feeders and switchgear
• Generator and UPS outputs
• Energy monitoring in buildings
• Power quality studies
• Fault and event recording

Selection checklist for the Janitza UMG 604-PRO

• Supply option: 230 V, 90 V or 24 V
• Network up to 480 V line to line
• Current transformers with 5 A or 1 A secondary
• Harmonics, transients and flicker needs
• Communication: RS485, RS232 or Ethernet
• Protocol: Modbus, BACnet or SNMP
• Digital inputs and outputs
• Temperature probe input

Installation, commissioning and maintenance notes for the UMG 604-PRO

Snap the device onto the DIN rail in a panel. Wire the voltage inputs through fuses and the current inputs through transformers, keeping the polarity right. Connect the supply that matches the option on the label. Set the transformer ratios and the network type in the menu or in the software, and check the rotary field indication. Back up the settings and recorded data on a schedule.

Requesting a quotation for the Janitza UMG 604-PRO

Please send the network voltage, the current transformers, the supply, the interface and the quantity. Seven Star LLC serves industrial customers in Oman and the GCC and replies with a quotation based on the information provided.

UMG 604-PRO measurement accuracy

Voltage uncertainty is plus or minus 0.2 percent, current plus or minus 0.25 percent and power plus or minus 0.4 percent. Harmonics are class 1 to IEC 61000-4-7.

UMG 604-PRO energy class

Active energy is class 0.5S with transformers of 5 A secondary, and class 1 with 1 A.

UMG 604-PRO ranges

The fundamental frequency range is 45 to 65 Hz. Voltage metering runs to 600 V line to neutral and 1000 V line to line. Current metering runs from 0.005 to 7 A.

UMG 604-PRO logic and alarms

The Jasic option allows custom logic with a 200 ms response. E-mail alarms are sent by SMTP.

Analyser records for the UMG 604-PRO

Keep the settings file, the transformer ratios and the event exports with the site records.

Choosing the right UMG 604-PRO supply option

Choose the supply option from the auxiliary voltage in the panel.

Documents and quotation

The attached file is Janitza’s English data sheet for the UMG 604-PRO (document 2.033.158.1.a). Please state the supply voltage option, current transformer ratio and communication requirement when requesting a quotation. Availability is confirmed per order.