Atec Zimmer-LMG450 User Manual

Page 6

f=var

f=50Hz

Motor

All necessary functions

in the basic device:

- Printer interface

- RS232 interface

- Formula editor

- Harmonics analysis for

CE pre-compliance

All necessary functions are
included in the basic device at
reasonable price.

Formula editor: the window shows the available mathematical
formulae, functions and logical conditions

Program example for the monitoring of overvoltage and
undervoltage

Further options:

IEEE488 interface
(Part No. L45-O1)
Interpretation of the complete
SCPI, as well as the LMG450
specific command set. The data
transfer yields up to 1Mbyte/sec.

Disk or memory card
(Part No. L45-O2F or L45-O2)
The two memory media, disk or
memory card, can be used as
required. They serve to record
measured and sampled values
and to save and recall device
settings (setups).

Flicker meter
(Part No. L45-O4)
Compliant to EN61000-4-15.
The evaluation of the voltage
fluctuations by currents up to
16A compliant to EN61000-3-3,
by currents up to 75A compliant
to EN61000-3-11.

Process signal interfaces,

digital and analog inputs

and outputs
(Part No. L45-O3)
To monitor further process
magnitudes like revolution,
torque etc. With assistance of
the formula editor efficiency

and other magnitudes can be
deduced and be applied as con-
trol parameters.

Harmonics up to 99th

from U, I and P
(Part No. L45-O8)
The harmonics up to 99th
option can be used to analyse
current, voltage and power
related to the fundamental
ranging from 1Hz to 1.2kHz.
It is possible to detect
interharmonics by a selectable
division factor giving a new
fundamental as reference.

Options

- Star-Delta Conversion

Part No. L45-O6

For detailed test and evalua-
tion of 3Ø motors the electrical
quantities for each winding
phase is needed. In some cases
you have access to the motor
terminal block with start and
end of all three windings. Then
you can measure all what you
need. But in most cases the
motor has only three terminals

and the internal star point or
the delta winding as to measure
its current is

not accessible.

Also far away from the motor
you have only the three wires.
With the option star-delta con-
version you have the capability
to calculate the not accessible
values (e.g. voltages, currents,
power, harmonics). This intelli-

gent solution with an additional
DSP works well at all waveforms
and every unbalance of mains
and load. Simply connect the
voltage paths in delta and click
the current clamps around the
wires. Select the internal con-
nection of your load and press
the „Link“ softkey.

50Hz -> f=variable, instrument for motor measurement in I

∗ U∆ wiring

Calculation of the real values in the star connected winding
phases (wiring: 3+1, U

∆ I∗ -> U∗ I∗)

Calculation of the real values in the delta connected
winding phases (wiring: 3+1, U

∆ I∗ -> U∆ I∆)

Printer and RS232 interfaces,
formula editor, harmonics
analysis of current and voltage

for pre-compliance tests in
accordance with EN61000-3-2.

Transients
(Part No. L45-O5)
The transients option detects
peaks and dips up to a resolu-
tion of 20µsec, scanning
taking place at 50kHz.

Torque determination
(Part No. L45-O16)
Precision Power Meter Series
LMG calculates torque and
speed of three-phase asynchro-
nous motors from motor current
and voltage without torque
measuring shaft.