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FEATURES
Compatible with -24 or -48 Vdc battery voltages (polarity insensitive).
4 isolated TLS fuse positions, TFD style holder, 125 Amps each (500 Amps per panel).
TFD fuse holder accepts TLS Fuses (up to 125 Amps) or TPS Fuses (up to 70 Amps).
Normal and Fuse Alarm LEDs for each fuse position indicates power or fuse failure.
"Form C" relay contacts to extend alarm conditions for each fuse position.
1/4" stud input and output blocks (1/4" studs on 5/8" centers).
Brackets allow for mounting in 19" or 23" racks (1 RU).
NEBS level 3 verified, with zone 4 earthquake.
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Westell
Fuse Panel
Technical Practice
NPTFD1009
4 POSITION TFD (TLS)
030-000223 Rev F
1009-03F
October 10, 2012

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Summary of Contents for Westell NPTFD1009

  • Page 1 1009-03F October 10, 2012 Westell Fuse Panel Technical Practice NPTFD1009 4 POSITION TFD (TLS) FEATURES Compatible with -24 or -48 Vdc battery voltages (polarity insensitive). 4 isolated TLS fuse positions, TFD style holder, 125 Amps each (500 Amps per panel).
  • Page 2: General Description

    Power is provided to and distributed 2. APPLICATION from the panel by using properly rated cables 2.1. NPTFD1009 Fuse Panel is designed to equipped with standard two hole lugs (1/4” be used in the rack level distribution of DC studs on 5/8” centers). Two hole lugs must power.
  • Page 3: Circuit Description

    (C) and normally open (NO) is made. Under 3. CIRCUIT DESCRIPTION “Normal Operation” there is a connection 3.1. Power is connected to the fuse panel between common (C) and normally closed through the ¼” stud input blocks. There is (NC). A 1 Amp PTC protects each of the one set of inputs for each fuse position to be relay contacts.
  • Page 4 is isolated from the chassis frame and Mounting Options isolated from all other returns. See Figure 3.1.1. Note: For this high current panel, a two hole lug must be used on all stud blocks (input and output, battery and return) for the fuse panel to function properly.
  • Page 5 cable that is a minimum 6 AWG, 90C, copper with operational TLS and GMT fuses, the cable (green with yellow stripe insulation panel should power up with green Normal recommended). Please use an appropriate Operation LEDs for each input that has UL®...
  • Page 6: Specifications

    5. SPECIFICATIONS 5.1 Voltage +/-24 or +/-48 Vdc 5.9. Alarm Fuses 1 Amp Max (GMT) +/-22 to +/- 58Vdc Max. (GMT18/100A referred) 5.2 Fuse size 125 Amps Max per fuse* 5.10. Dimensions 1.75”H, 17”W, 11”D 125 Amps Max (TLS)* 5.11. Mounting 19”...
  • Page 7: Technical Services

    6. TECHNICAL SERVICES This equipment is identified by a If technical or customer assistance is model number ie. NPTFD1009. Be sure to required, contact Westell by calling or using have the model number and serial number one of the following options: available when making inquiries about the equipment.
  • Page 8 _____________________________________________________________________________________...
  • Page 9 4.2700 0.2500 _____________________________________________________________________________________...
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