
Power Protection and Conditioning
STF Series – Active Tracking® Filters
Low voltage/high frequency noise is caused by everyday
events such as turning on machinery, motors, or equipment.
Although noise is less dramatic than high voltage transients,
the long term effects of these frequent disturbances can
be as damaging. Filtering systems such as SolaHD Active
Tracking® Filters provide clean AC power by eliminating
lower voltage noise.
The SolaHD STF Series offers our original active tracking
technology to guard against commonly occurring but very
damaging, lower energy transients. Offering excellent noise
reduction, the lter continuously tracks the input AC power
line and responds instantly upon detecting extraneous high
frequency noise.
The STF Series eliminates low voltage/high frequency noise
via a low-pass or L-C lter. These lters are used for low
energy, high frequency noise reduction and consist of a
series of inductors, capacitors and resistors. STFs are load
dependent which means that the series inductors located on
each phase and neutral conductors are sized to handle the
maximum current draw on the line. These inductors together
with the capacitors and resistors form a circuit capable of
absorbing a large bandwidth of noise.
These devices are designed to meet UL 1283, and CSA
C22.2 No. 8 for Electromagnetic Interference Filters. STFs
attenuate or reduce the amplitude of noise to a minimum
of 40 dB that occurs in a frequency range of 50 kHz to
50 MHz. They also provide the industry’s best IEEE Category
“A” protection, typically reducing normal mode transients
to +/- 5 volts.
Built to meet your unique requirements, these lters are
available in a multitude of voltage congurations. They are
hardwired and designed for years of trouble free operation
requiring little or no operator intervention after installation.
Active Tracking® Filters are one part Emerson's a total power
quality solution. They can be used alone or in conjunction
with other SolaHD products to solve more complex power
quality problems.
E311348
Features
• Non degrading, series lter technology for
total durability
• High frequency noise lter, RLC low-pass lter
• Three phase applications up to 200 amp
• Attenuates noise to 40 dB in frequency range
of 50 kHz to 50 MHz
• Operating temperature from -40°C to +45°C
• Hardwired connection
• MTBF greater than 100,000 hours, Mil Std. 217F
• Ten year limited warranty
Certifications and Compliances
•
Listed
- UL 1283
- CSA C22.2 No. 8
• RoHS Compliant
Applications
• Branch and Control Panels
• Factory Automation Installations
• Point of Use Industrial Service Equipment
• Dedicated Industrial and Machine Tools Equipment
• Telecommunications Equipment
© December 2018
Related Products
• Power Conditioners
• Uninterruptible Power System
• Power Supplies
27

Power Protection and Conditioning
Selection Table
Catalog
Number
STF0150-10Y
STF0300-10Y
STF0500-10Y
STF1000-10Y
STF2000-10Y
STF0150-24D
STF0300-24D
STF0500-24D
STF1000-24D
STF2000-24D
STF0150-27Y
STF0300-27Y
STF0500-27Y
STF1000-27Y
STF2000-27Y
STF0150-48D
STF0300-48D
STF0500-48D
STF1000-48D
STF2000-48D
Amps
15.0 14 15A 18.75A
30.0 10 30 A 37.5A
50.0 4 50A 62.5A
100.0 2 100A 125 A
200.0 3/0 200A 250A
15.0 14 15A 18.75A
30.0 10 30 A 37.5A
50.0 4 50A 62.5A
100.0 2 100A 125 A
200.0 3/0 200A 250A
15.0 14 15A 18.75A
30.0 10 30 A 37.5A
50.0 4 50A 62.5A
100.0 2 100A 125 A
200.0 3/0 200A 250A
15.0 14 15A 18.75A
30.0 10 30 A 37.5A
50.0 4 50A 62.5A
100.0 2 100A 125 A
200.0 3/0 200A 250A
Min. Wire Size
(AWG Suggested)
Fuse/Circuit Breaker Ampacity
Suggest Max
Three phase Models (120/208 Vac wye) *
Three phase Models (240 V Delta) *
Three phase Models (277/480 V wye) *
Three phase Models (480 V Delta) *
Case Dim.
in (mm) - A x B x C
14.00 x 12.00 x 6.00
(355.6 x 304.8 x 152.4)
14.00 x 12.00 x 6.00
(355.6 x 304.8 x 152.4)
16.00 x 14.00 x 8.00
(406.4 x 355.6 x 203.2)
20.00 x 16.00 x 10.00
(508 x 406.4 x 254)
24.00 x 20.00 x 10.00
(609.6 x 508 x 254)
14.00 x 12.00 x 6.00
(355.6 x 304.8 x 152.4)
14.00 x 12.00 x 6.00
(355.6 x 304.8 x 152.4)
16.00 x 14.00 x 8.00
(406.4 x 355.6 x 203.2)
20.00 x 16.00 x 10.00
(508 x 406.4 x 254)
24.00 x 20.00 x 10.00
(609.6 x 508 x 254)
14.00 x 12.00 x 6.00
(355.6 x 304.8 x 152.4)
14.00 x 12.00 x 6.00
(355.6 x 304.8 x 152.4)
16.00 x 14.00 x 8.00
(406.4 x 355.6 x 203.2)
20.00 x 16.00 x 10.00
(508 x 406.4 x 254)
24.00 x 20.00 x 10.00
(609.6 x 508 x 254)
14.00 x 12.00 x 6.00
(355.6 x 304.8 x 152.4)
20.0 x 16.0 x 10.0
(508.0 x 406.4 x 254.0)
20.0 x 16.0 x 10.0
(508.0 x 406.4 x 254.0)
20.00 x 16.00 x 10.00
(508 x 406.4 x 254)
24.00 x 20.00 x 10.00
(609.6 x 508 x 254)
Mounting Flange Dim.
in (mm) - D x E x F
14.75 x 10.0 x 15.5
(374.7 x 254.0 x 393.7)
14.75 x 10.0 x 15.5
(374.7 x 254.0 x 393.7)
16.75 x 12.00 x 18.5
(425.4 x 304.8 x 469.9)
21.25 x 10.0 x 22.5
(539.8 x 254.0 x 571.5)
25.25 x 14.0 x 26.5
(641.4 x 355.6 x 673.1)
14.75 x 10.0 x 15.5
(374.7 x 254.0 x 393.7)
14.75 x 10.0 x 15.5
(374.7 x 254.0 x 393.7)
16.75 x 12.00 x 18.5
(425.4 x 304.8 x 469.9)
21.25 x 10.0 x 22.5
(539.8 x 254.0 x 571.5)
25.25 x 14.0 x 26.5
(641.4 x 355.6 x 673.1)
14.75 x 10.0 x 15.5
(374.7 x 254.0 x 393.7)
14.75 x 10.0 x 15.5
(374.7 x 254.0 x 393.7)
16.75 x 12.00 x 18.5
(425.4 x 304.8 x 469.9)
21.25 x 10.0 x 22.5
(539.8 x 254.0 x 571.5)
25.25 x 14.0 x 26.5
(641.4 x 355.6 x 673.1)
14.75 x 10.0 x 15.5
(374.6 x 254.0 x 393.7)
21.25 x 10.0 x 21.5
(539.75 x 254.0 x 546.1)
21.25 x 10.0 x 21.5
(539.75 x 254.0 x 546.1)
21.25 x 10.0 x 21.5
(539.8 x 254.0 x 546.1)
25.25 x 14.0 x 25.5
(641.4 x 355.6 x 647.7)
Weight
lbs (kg)
35.0 (19.90) 4
35.0 (19.90) 4
45.0 (20.41) 2
65.0 (29.48) 2
115.0 (52.16) 2
35.0 (19.90) 4
35.0 (19.90) 4
45.0 (20.41) 2
65.0 (29.48) 2
115.0 (52.16) 2
35.0 (19.90) 4
35.0 (19.90) 4
45.0 (20.41) 2
65.0 (29.48) 2
115.0 (52.16) 2
35.0 (19.90) 4
35.0 (19.90) 4
45.0 (20.41) 4
65.0 (29.48) 2
115.0 (52.16) 2
Design
Style
* Units are standard in NEMA 12 hinged enclosures.
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© December 2018