CTSR Series
PCB footprint CTSR series
Assembly on PCB
● Recommended PCB hole diameter
1.2 mm for secondary pin
2 mm for retention pin
2.4 mm
● Maximum PCB thickness
● Wave soldering profile
No clean process only
maximum 260 °C, 10 s
The two retention pins inserted into the case of the transducer are electrically isolated by the housing. Because one of them is
close to the secondary connector, it is recommended to connect both to the secondary side GND or +Uc.
Consequently any primary conductor must be placed in the PCB at the requested isolation distance regarding these secondary
sides (see also paragraph “Isolation around the CTSR transducer housing”).
Definition of typical, minimum and maximum values
Minimum and maximum values for specified limiting and safety conditions have to be understood as such as well as values
shown in “typical” graphs.
On the other hand, measured values are part of a statistical distribution that can be specified by an interval with upper and lower
limits and a probability for measured values to lie within this interval.
Unless otherwise stated (e.g. “100 % tested”), the LEM definition for such intervals designated with “min” and “max” is that the
probability for values of samples to lie in this interval is 99.73 %.
For a normal (Gaussian) distribution, this corresponds to an interval between -3 sigma and +3 sigma. If “typical” values are not
obviously mean or average values, those values are defined to delimit intervals with a probability of 68.27 %, corresponding to
an interval between -sigma and +sigma for a normal distribution.
Typical, maximal and minimal values are determined during the initial characterization of a product.
Safety
This transducer must be used in limited-energy secondary circuits according to IEC 61010-1.
This transducer must be used in electric/electronic equipment with respect to applicable standards and safety requirements in
accordance with the manufacturer’s operating instructions.
Caution, risk of electrical shock
When operating the transducer, certain parts of the module can carry hazardous voltage (eg. primary busbar, power supply).
Ignoring this warning can lead to injury and/or cause serious damage.
This transducer is a build-in device, whose conducting parts must be inaccessible after installation.
A protective housing or additional shield could be used.
Main supply must be able to be disconnected.
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28January2014/version 7
LEM reserves the right to carry out modifications on its transducers, in order to improve them, without prior notice
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