3Ug4625 Residual Current Monitoring Relay With 3Ul23 Transformer; Application Areas - Siemens SIRIUS 3UG4 Equipment Manual

3UG4625 residual current monitoring relay with
3UL23 transformer
8.1

Application areas

Application areas
Residual current monitoring relays are used in industry to:
• Protect systems from damage caused by fault currents
• Prevent production losses caused by unplanned downtime
• Perform maintenance to meet all demands
3UG4625 residual current monitoring relays are used in conjunction with 3UL23 residual
current transformers to monitor systems where environmental conditions increase the chance
of higher fault currents. The devices are used for applications including in the following areas:
Table 8-1
Cause of fault
•
•
•
•
•
Note
3UG4625 residual current monitoring relays monitor devices and systems for their correct
function.
They are not suitable for personal protection or protection from fires.
SIRIUS 3UG4 / 3RR2 monitoring relay
Equipment Manual, 07/2021, NEB927043002000/RS-AD/005
Application areas of 3UG4625 residual current monitoring relays
Dust deposits on terminals
Increased levels of humidity
Capacitive fault currents as "basic fault load"
Porous cables and lines
Diminishing insulation caused by material wear •
Application
• Woodworking, grain mills
• Mining, power supply containers
• For large systems (line length)
• Motor winding insulation
Furnaces
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