Description
2.8 Electronic trip unit ETU
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
Manual, 10/2018, L1V30499596002-01
81
Software-based parameterization
The ETUs of the 6-series can be parameterized and commissioned manually on the display,
or in an efficient, clear, and error-avoiding manner with the freely available powerconfig
software.
Settings can be stored and are thus reproducible at any time.
Note
powerconfig is commissioning and maintenance software for all communication-capable
SENTRON products from Siemens. With this software, the circuit breaker can be
parameterized and commissioned and its settings can be archived and, in the operating
phase, values from the plant (current, voltage, etc.) can be read out and the status of the
circuit breaker can be acquired.
The powerconfig (
https://support.industry.siemens.com/cs/ww/en/view/63452759
) software is
freely available.
2.8.5.1
Metering functions
Measured values of the ETUs of the 3-series
The electronic trip units of the 3-series save a range of measured values that are based
exclusively on status changes and current signals. In addition to the visual display of
maintenance signals, trip reasons, overload measurements, etc. indicated by LEDs on the
ETU, a number of measured values such as trip history or maintenance information can be
read out on the ETUs of the 3-series, too, via the TD410/420 test devices on the front
interface of the ETU.
Measured values of the ETUs of the 3-series
Instantaneous values
Measured value
Measuring accuracy
Reference standard
Currents (rms value)
Reference standard: Class 1 acc. to IEC
61557-12
A
I
1,
I
2
, I
3
, neutral
1%
Class 1 acc. to
IEC 61557-12
Ground fault current
A
I
g
2%
—
Measuring interval memory of the individual parameters for each interval with a time stamp
Measured value
Clocking
Monitoring period
Current: smallest and largest
A
I
min
, I
max
Fixed or synchro-
nizable via test device
Duration: 5 to 120 min
Number of intervals:
24
Information for tripping and switch-off data
stored in ETU with or without auxiliary power supply after a fault
Measured value
Type of protection function tripped
e.g. L, S, I, G - via LED display and info button and powerconfig
Fault values per phase
A
e.g. L1, L2, L3, N
Time stamp
Date, time, and consecutive number