Installation, Operation and Service Manual
LKP Series 4 Channel OEM
© 2019 DynAmp, LLC
Page 17
041593O
4. Channel numbers progress clockwise as viewed from front face (conventional current flow is
toward the viewer).
4.10 MAGNETIC CENTERING
The distribution of load (i.e., heat) among the various channels will be optimized if the
Measuring Head is magnetically centered. This is a process of equalizing certain channel
voltages by positioning the Measuring Head on the bus bar. In essence, the channel voltages
from opposite sides of the Measuring Head are compared and the side having the lower voltage
is moved toward the bus. Using the LKP-12 as an example (refer to Figure 4.4), the voltages of
channels 1 and 3 are compared and the voltages of 2 and 4 compared. If the voltages are
measured as shown, then the Measuring Head is to be moved as indicated until the best
balance at opposite sides is obtained. The final head position may yield voltages of 19 V at
channels 1 and 3, and perhaps 13 V at channels 2 and 4.
The channel voltages depend on several factors, such as total bus current, bus shape,
proximity to other bus bars, and channel coil resistance. In practice, it may prove impossible to
obtain full equalized channel voltages because of a severe magnetic environment or lack of
space for moving the Measuring Head. In this case, the best position should be found; then all
channels must be checked to see that all are within the limits of +3 V to 30 V (+3 V to 25 V for
LKP-12). If these limits are exceeded, another location should be selected. If other locations
are not available, consult the factory regarding forced air cooling of the overloaded channels, or
replacing the system with a larger unit.
Figure 4.4
Magnetic Centering
