Watlow DIN-A-MITE Style C - Manual (Page 20)

20 WATLOW DIN-A-MITE Style C User's Manual
An external EMI filter must be used in
conjunction with the DIN-A-MITE for
loads in excess of six amperes (6A) at 150
to 250 kHz. Without a filter applied, the
DIN-A-MITE does not comply with the
conducted emissions standard for loads
above 6A at 150 to 250 KHz.
Watlow has verified that two types of
filters will suppress electromagnetic
interference (EMI) created by the DIN-A-
MITE power controller to within the CE
requirements.
A tank filter supplied by Crydom or
Watlow, installed across the power lines,
suppresses EMI on the power lines.
See Figures 1 and 2.
See Table 1 for the correct filter.
Table 1— DIN-A-MITE EMI Filters.
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WARNING:
The tank filters specified may suppress desirable
communications carried on power lines in the 150 to
250 kHz region. The filters may suppress carrier
current such as that used for infant monitors and
medical alert systems. Verify that suppressed carrier
current or other desirable communications on power
lines creates no hazard to people or property. Failure
to observe this warning could result in damage to
property, and injury or death for personnel.
Ó
WARNING:
All filter installation and wiring must be performed by
qualified personnel, and conform to local and national
electrical codes. Failure to observe this warning could
result in damage to property, and injury or death for
personnel.
N
A
PE
5 6
2 3
DIN-A-MITE
Filter
Heater
Breaker or fused disconnect
Semiconductor Fuse
A protective earth (PE)
connection is required.
B
A
PE 3 1
DIN-A-MITE
6 4
C
Filter
A protective earth (PE)
connection is required.
A third semiconductor fuse
is not required with a 2-leg
DIN-A-MITE.
Semiconductor Fuses
Breakers or fused disconnect
Heater
5
2
Alternate
Wye
5
6 4
Figure 1 — Tank filter,
single-phase, 230V.
Required External EMI Filters for DIN-A-MITE with More than 6A Loads
Description Crydom Watlow
Filter Filter
Single-phase, 230VÅ (ac) 1F25 14-0019
Three-phase, 440VÅ (ac) 3F20 14-0020
Figure 2 — Tank filter,
three-phase, 440V.