Siemens SIRIUS 3UG4 - Page 180

undershoots the set threshold R1 (shutdown), output relay K1 switches. If the measured value
overshoots the set threshold R1 (shutdown) including hysteresis, output relay K1 reverts to the
original state. If the measured value overshoots the set threshold R2 (warning) including
hysteresis, output relay K2 reverts to the original state.
All operating states of the 3UG4582/3UG4583 insulation monitoring relays are displayed via
three LEDs.
Additional monitoring functions
The 3UG4582/3UG4583 insulation monitoring relays also have two further functions.
The devices monitor the terminals and KE cyclically for open circuit. If an open circuit is
detected on one of the connected conductors, output relay K1 switches to the fault state (on the
3UG4583, both output relays K1 and K2). The 3UG4583 also has an open-circuit detection
function that can be shut down and automatically tests the measuring signal inputs L+ and L- at
system start. This open-circuit test can be repeated at any time during operation by activating
the test function (Test/RESET button). On the 3UG4583, open-circuit detection can be switched
on (ON) and o󹪜 (OFF) using DIP switch 3.
The 3UG4582/3UG4583 insulation monitoring relays monitor the ungrounded AC system, DC
system, or AC/DC system for impermissibly high system discharge capacity. If the system
discharge capacity is too high, output relay K1 switches to the fault state (on the 3UG4583, both
output relays K1 and K2 switch to the fault state). If incorrect settings that could result in a
malfunction are made on the 3UG4583, the output relays switch to the fault state. If, for
example, an insulation warning value is set that is lower than the selected shutdown threshold,
this results in a parameterization error.
You will 󹪝nd the switching states of the output relays below in the Section "Function diagrams
(Page 182)" and in the Chapter "Diagnostics (Page 191)".
You will 󹪝nd the adjustment ranges and factory settings of the available parameters and the
de󹪝nitions of the DIP switch positions in Chapter "Operator control (Page 188)".
Reset response and memory function
The device features an autoreset that resets output relay K1 to its original state after an fault
message and recti󹪝cation of the fault that has occurred. As well as autoreset, the devices can
also be set to manual RESET by means of external switching.
The output relay (on 3UG4583: both output relays) remains dropped out if manual RESET is
active, and it only picks up again after actuation of the combined test/reset button, or following
activation of remote reset (terminals Y2‑Y3) if the insulation resistance is greater than the set
threshold including hysteresis. Another method of resetting the device is by switching the
3UG458. insulation monitoring relay.
9.4 3UG4582/3UG4583 insulation monitoring relays
SIRIUS 3UG4 / 3RR2 monitoring relay
180 Equipment Manual, 07/2021, NEB927043002000/RS-AD/005