Siemens SIMOCODE 3UF User Manual

Monitoring Functions
9.3 Voltage U< (lower limit)
SIMOCODE PRO V PN FDI
52 Programming and Operating Manual, 05/2020, A5E44499659002A/RS-AA/001
9.3 Voltage U< (lower limit)
Monitoring voltage U< (lower limit)
SIMOCODE pro supports two-phase undervoltage monitoring of either a three-phase
network or a one-phase network for freely selectable limits. The response of SIMOCODE on
reaching a pre-warning level or trip level can be freely parameterized and delayed. Voltage is
measured by current/Voltage measuring modules. This is based on the minimal voltage of all
voltages U
min
.
Note
Please note that only phase voltage is available with SIMOCODE pro V basic units up to
version *E06*. If required, the
line-to-line voltage can be calculated from the phase voltage
with the aid of the logic module "Calculator 1/2" as follows: Line
-to-line voltage = phase
voltage * 1.73.
From version *E07* onwards, either phase voltage or line
-to-line voltage can be used.
Furthermore, even when the motor is switched off, SIMOCODE pro can determine and
signal the further availability of the feeder by measuring the voltage directly at the circuit
breaker or at the fuses in the main circuit.
Trip level (CiR), Warning level (CiR)
You can parameterize two different response levels (trip level/warning level). Voltage
monitoring will be activated if the voltage of one or more phases falls below the response
level or warning level.
Trip level
0 to 2040 V in 8 V increments
Warning level
0 to 2040 V in 8 V increments
Trip level and warning level activity
Here you can specify in which motor operating states the trip level/warning level is to take
effect:
Always, except in the case of TPF (on+)
Trip level/warning level alway
s takes effect,
regardless of whether the motor is running or
stationary; Exception: "TPF", i.e. motor feeder
is in test position.
When the motor is on, except in the case of
TPF (run)
Trip level/warning level only takes effect if the
motor is on and not in the test position
Always (on)
1)
Trip Level/warning level always takes effect,
regardless of whether the motor is running or
at a standstill
1)
When using Basic Unit 2 (from product version *E03*) with a current/voltage measuring
module

Siemens SIMOCODE 3UF Specifications

General

Brand	Siemens
Model	SIMOCODE 3UF
Category	Control Systems
Language	English