Schaffner Group
User and Installation Manual
Output filter FN5420 and RWK5420
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3.6 Thermal protection switch specifications
The central choke (phase V) is equipped with a thermal protection switch (temperature switch). The
switch is connected in series to the auxiliary terminal TS-TS’. If the temperature switch reaches the
nominal switching temperature (NST), the switch will open.
Table 13 thermal protection switch specifications
Contact type
Normally closed (NC)
Nominal switching temperature (NST)
180°C
Resetting temperature (RST)
145°C (indication only)
Operating voltage
Up to 250V AC
Rated current AC I
nom
2.5A cos
ϕ
= 1.0
1.6A cos
ϕ
= 0.6
1.8A cos
ϕ
= 0.4-0.5
3.7 Cooling requirement
Sine wave filter FN5420 IP20 come with embedded ventilation when needed. Thus, it is important to
install the filter in a way that the air channels are not blocked and within an ambient temperature ac-
cording to the specifications from section 2.2.
Important: Blocking of air channel might cause overheating of filter compo-
nents.
