Siemens 3UG4 - Operator Control

3UG458. insulation monitoring relay
9.3 3UG4581 insulation monitoring relay
3UG4 / 3RR2 monitoring relays
224 Manual, 05/2016, NEB927043002000/RS-AC/004
9.3.3
Operator control
Parameters
The following parameters can be set on the two ten-level rotary buttons (absolute scale) with
the help of a screwdriver:
Table 9- 4 Parameter information, 3UG4581 insulation monitoring relay
Parameters
Control elements
1)
Setting range
Increment
Minimum value
Maximum value
Threshold for undershoot (tens position of R)
(R.1-value)
2)
8 0 kΩ 90 kΩ 10 kΩ
increments
Threshold for undershoot (R.2-value)
3)
7 1 kΩ 10 kΩ 1 kΩ
increments
Reset response 2 Deactivated Activated --
1)
The position digits refer to the front view in Chapter "Operator controls and connection
terminals (Page 218)".
2)
By operating the rotary button, the tens position of the threshold for undershoot can be
selected.
3)
By operating the rotary button, the units position of the threshold for undershoot can be
selected
The threshold is derived from the sum of the two set values. If, for example, threshold R.1-
value is set to 70 and threshold R.2-value is set to 8, threshold R1 corresponds to 78 kΩ.
Chapter "Internal circuit diagrams (Page 227)" shows examples for the different monitoring
modes.
The parameters are defined in the Chapter "Parameters (Page 363)".
Tools required
The same screwdriver can be used to set the parameters as for wiring the insulation
monitoring relays.