DATASHEET
3-Phase Filters FN 3268
EMC/EMI Filter for Installations with Residual Current Device (RCD)
2019
13 Feb 2019
EMC/EMI Products
FN 3268: EMC/EMI Filter for Installations with Residual Current Device (RCD)
  • Full functionality with RCDs according to IEC 61008 and new VDE 0664-110*
  • Compatible with 30 mA RCDs up to 30 m motor cable for electric shock protection according to IEC 61008
  • Compatible with 300 mA RCDs up to 100 m motor cable for fire protection according to IEC 60364-4-42 (VDE 0100-482)

Performance indicators

Technical specifications

Maximum continuous operating voltage

3x 520/300 VAC

Operating frequency

DC to 60 Hz

Rated currents

7 to 180 A @ 50°C

High potential test voltage

P –> E 2750 VDC for 2 sec
P –> P 2250 VDC for 2 sec

Protection category

IP 20

Overload capability

4x rated current at switch on,
1.5x rated current for 1 minute, once per hour

Temperature range (operation and storage)

-25°C to +100°C (25/100/21)

Flammability corresponding to

UL 94 V-2 or better

Design corresponding to

UL 1283, CSA 22.2 No. 8 1986, IEC/EN 60939

MTBF @ 50°C/400 V (Mil-HB-217F)

>300,000 hours

Approvals

Features and benefits

  • Innovative low-leakage current filter with same smallest dimensions as FN 3258
  • Significant reduction of leakage and ground currents caused by long motor cables
  • Prevents unwanted fault shut-downs from RCDs in machines and process automation equipment
  • Patented filter design avoiding early saturation and ringing effects
  • Excellent attenuation compliant with: C1 limits EN 61800-3 with 30 meter motor cable and 30 mA RCD (electric shock protection)**
  • C2 limits EN 61800-3 with 100 meter motor cable and 300 mA RCD (fire protection)

Typical applications

  • Three-phase variable speed drives (VSD), servo drives, and inverters
  • Machinery and process automation equipment
  • Building automation, HVAC equipment, pumps, ventilation, and elevators
  • Conveyors, handling and storage systems, and cranes
  • Machine tools, wood working machines, and printing machines

Typical electrical schematic

Filter selection table

Filter 

Rated current 

Typical drive 

Leakage current 

Power loss 

Input/Output 

Weight 

@ 50°C (40°C) 

power rating* 

@ 520 VAC/50 Hz 

@ 25°C/50 Hz 

connections 

[A] 

[kW] 

[mA]** 

[W] 

[kg]

FN 3268-7-44 

7 (7.7) 

2.5 

4.5 

-44 

0.5

FN 3268-16-44 

16 (17.5) 

7.5 

2.6 

6.1 

-44 

0.8

FN 3268-30-33 

30 (32.9) 

18.5 

2.6 

13.5 

-33 

1.2

FN 3268-42-33 

42 (46.0) 

22 

2.6 

17.4 

-33 

1.4

FN 3268-55-34 

55 (60.2) 

37 

2.6 

18.1 

-34 

2.2

FN 3268-75-34 

75 (82.2) 

45 

10.8 

25.3 

-34 

2.9

FN 3268-100-35 

100 (109.5) 

55 

9.6 

30.0 

-35 

4.1

FN 3268-130-35 

130 (142.4) 

75 

14.2 

38.0 

-35 

4.6

FN 3268-180-40 

180 (197.1) 

110 

17.4 

48.6 

-40 

6.0

Typical filter attenuation

Per CISPR 17; A=50 Ω/50 Ω sym; B=50 Ω/50 Ω asym; C=0.1 Ω/100 Ω sym; D=100 Ω/0.1 Ω sym

7 to 42 A types

55 to 100 A types

130 and 180 A types

Installation

  • RCD
    Please note that for electrical devices with 6-pulse rectifiers at line input, like three-phase motor drives, a RCD type B or B+ is required. RCD with time delay are needed to prevent unwanted fault trip at switch on or voltage spikes. These RCD types B with time delay have often an added letter “S” or “K”, please ask the supplier for correct type. Caution: Please validate system with chosen RCD to guarantee functionality.
  • EMC/EMI filter FN 3268
    Filter types from 7 to 55 A are designed to be compatible with 30 mA RCDs according to IEC 61008 and new VDE 0664-110 standards. Filters from 75 up to 180 A are designed to be compatible with 300 mA RCDs. Install the filter as close as possible at line side of the motor drive. Regarding correct EMC installation, please refer to the EMC installation guide in the manual from motor drive supplier.
  • Motor drive
    Please set the PWM pulse pattern of the variable speed motor drive fixed to 4 kHz. Other pulse patterns cause higher leakage currents. Filter designs with other pulse pattern than 4 kHz are possible upon request.
  • Motor cable length
    Motor cable length should not exceed 30 meters for 7 up to 55 A filter types to fulfill class C1 of recommended standard EN 61800-3. For 75 up to 180 A filters, cable length should not exceed 100 meters to fulfill class C2.
  • Internal EMC/EMI components
    Please disconnect all internal Y-capacitors (internal EMC/EMI filters) in the motor drive, because these capacitors cause additional leakage currents.
  • Harmonics on line voltage
    High voltage harmonics can create additional system leakage currents. FN 3268 filters are tested under following conditions: Supply voltage is contaminated with harmonics according to IEC 61000-2-4, class 2, where odd-numbered multiplies of three are limited to 30%.

Mechanical data

FN 3268

Dimensions

7 A 

16 A 

30 A 

42 A 

55 A 

75 A 

100 A 

130 A 

180 A

190 

250 

270 

310 

250 

270 

270 

270 

380

40 

45 

50 

50 

85 

80 

90 

90 

120

70 

70 

85 

85 

90 

135 

150 

150 

170

160 

220 

240 

280 

220 

240 

240 

240 

350

180 

235 

255 

295 

235 

255 

255 

255 

365

20 

25 

30 

30 

60 

60 

65 

65 

102

4.5 

5.4 

5.4 

5.4 

5.4 

6.5 

6.5 

6.5 

6.5 

11111

1.5 

1.5 

1.5 

1.5 

22 

22 

25 

25 

39 

39 

45 

45 

51

M5 

M5 

M5 

M6 

M6 

M6 

M10 

M10 

M10 

20 

22.5 

25 

25 

42.5 

40 

45 

45 

60

29.5 

29.5 

39.5 

37.5 

26.5 

70.5 

64 

64 

47

Filter input/output connector cross sections

-33 

-34 

-35 

-40 

-44

Solid wire 

16 mm2

35 mm2

50 mm2

95 mm2

10 mm2

Flex wire 

10 mm2

25 mm2

50 mm2

95 mm2

6 mm2

AWG type wire 

AWG 6 

AWG 2 

AWG 1/0 

AWG 4/0 

AWG 8

Recommended torque 

1.5-1.8 Nm 

4.0-4.5 Nm 

7-8 Nm 

17-20 Nm 

1.5-1.8 Nm

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