Watlow DIN-A-MITE Style B - Manual (Page 12)

12
WATLOW DIN-A-MITE Style B User's Manual
An external EMI filter must be used in
conjunction with the DIN-A-MITE for
loads in excess of six amperes (6 A) at 150
to 250 kHz. Without a filter applied, the
DIN-A-MITE does not comply with the
conducted emissions standard for loads
above 6 A 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 isolating and 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 needed with a 2-leg
DIN-A-MITE.
Semiconductor Fuses
Breaker or fused disconnect
Heater
5
2
Alternate
5
6 4
Figure 1 — Tank filter,
single-phase, 230V.
Required External EMI Filters for DIN-A-MITE with More than 6 A 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.