ERICO TSG Series Surge Reduction Filters (TSG-RSF) - Manual (Page 6)

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Installation Cautions
Figure 1. Seek specialist advice with the above installations.
3. INSTALLATION CAUTIONS
CAUTIONS:
• Transient protection devices are usually
rated to protect against non-repetitive
pulses from sources such as direct or
induced lightning energy.
• They are not designed to provide
protection against repeated cyclic
anomalies such as those caused by
motor speed control notching (variable
speed controls, etc.).
• SRFs are not designed to provide
protection against sustained over-voltage
conditions where the supply voltage
exceeds, for an extended period of time,
the nominal rating of the protection
equipment (continuous over-voltages
from poorly regulated generators or
distribution systems, for example).
• Smaller power generation equipment does
not always conform to the same standards
of voltage regulation that is in place for
mains power reticulation. A large number
of smaller or cheaper generators have a
voltage waveform that approximates
240Vrms (often poorly regulated), but
more importantly, which often contains
significant higher order harmonics and
may exhibit a peak voltage on each
half cycle far in excess of the normal
340V (peak). Such machines are usually
capacitive excitation induction generators,
as opposed to synchronous generators.
The problem is usually increased when
the generator is lightly loaded.
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