Voltage Monitoring - Siemens SIMOCODE pro System Manual

Monitoring functions
5.3

Voltage monitoring

Description
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 pro 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
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 using the logic module "Calculator 1/2" as
follows: Line-to-line voltage = phase voltage
From version *E07* onwards, either phase voltage or line-to-line voltage can
be used.
Voltage U
via
Current/voltage
measuring module
1) Hysteresis for voltage, cos phi, power
Fig. 5-4: "Voltage Monitoring" function block
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.
5-8
Voltage monitoring
Trip level: U<
Trip level activity
Response at trip level
min
Trip delay
Warning level: U<
Warning level activity
Response at warning level
Warning delay
Hysteresis
.
min
1.73.
*
Tripping
See
Table 5-7
See
Table 5-8
1)
GWA 4NEB 631 6050-22 DS 03
QE1
QE2
QE3
QE4
QE5
Event
- Trip level U<
Event
- Warning level U<
SIMOCODE pro