428
Janitza UMG 104 / UMG 604 / UMG 604-PRO (Utility Meter)
7 JanitzaUMG104/UMG604/UMG604-PRO
(UtilityMeter)
7.1 JanitzaUMG104/UMG604/UMG604-PRO
The Solar-Log™ Utility Meter is a universal metering device. It can be integrated in both low- and medium-voltage
networks (via a transformer) and is needed for various functions:
•
controlling voltage-dependent reactive power via the Q(U) function
•
controlling reactive power at the feeding point
•
recording the measurement data needed for the response signals sent to the grid operator
Only voltage measurements are required for voltage-dependent reactive power reduction Q(U). However, we still
recommend using both current and voltage measurements to be able to check that the reduction function is ope-
rating properly. Current and voltage measurements are needed for the other functions.
Utility Meter supply voltage:
•
95-240Vac, 45-65Hz or 135-340Vdc
The Utility Meter‘s measuring inputs have the following limits:
•
Voltage line conductor AC (without a voltage transformer): 10…300 V AC.
•
Voltage phase AC (without a voltage transformer): 17…520 V AC.
•
Current (without a current transformer) 0.005, 7.5 A.
•
Frequency of the fundamental component: 45 ..65 Hz.
The limit may not be exceeded. For this reason, a measuring transformer needs to be installed for most applica-
tions.
We recommend the following transformer ratio:
•
Voltage: Secondary 100V
e.g. at 20kV grid converter 20000:100V.
•
Current: Secondary 5A
e.g. 100:5A.
Note
The Utility Meter that we use is produced by the company Janitza.
Refer to the Janitza UMG 104 / UMG 604 / UMG 604-PRO manual for further technical details.
We cannot guarantee the functionality of other Janitza devices.
=> The operating modes Utility Meter (U / U+I) is only possible with the Solar-Log 1000 and
2000.
Note
The Utility Meter cannot be connected to the inverters with a single bus.
For this reason, use one RS485 connection for the inverters and one RS485 connection for the Utility
Meter.
To Next Page
Loading...