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IMAX SWITCHES is uniquely inbuilt, shrouded, compact with generous terminal capacity and a fused short circuit capacity upto 80 KA.
IMAX SWITCHES are feature rich with asthetic looks, elegance, sturdy & economical. Features that no other SDF offers Because of these unique characteristic the IMAX SWITCHES are in the frontline of protection.
The design of imax switch type FS is based on the innovative : 'QUAD BREAK' principle. This design enables a drastic reduction in the intensity of arc, which is produced at the time of breaking. During breaking the current path is broken at four places in series, thus the arc is reduced. This leads to less strain on the contacts and the life of the switch is increased.
The moving contacts are designed to make two parallel current paths, which produce high electro-magnetic attraction forces during high faults and increase the contact pressure, this eliminates chance of arcing at the contacts and allow the fuse to safely clear the fault. The self-cleaning contacts ensure wiping of deposits during each operation and increase the life of the contacts.
The fuses in imax switches type FS are stationary and are isolated at the both the incoming and outgoing ends, this offers complete safety for fuse replacement in OFF condition.
The switch mechanism is quick-make quick-break i.e. independent of operating speed. Positive ON/OFF indication is provided at the switch handle and mechanism assembly.
The complete range from 32A to 250A is offered in TP/TPN versions. Phase barriers are provided as a standard feature to prevent any accidental fault between the fuses.
  Complies with IEC 947-3/IS 13947 part 3
Hitech fuses short circuit capacity : upto 80 KA
No movement of fuses / long life : Stationery fuses with double break arrangement ensure long mechanical & electrical life of switch fuses. The fuse does not run the risk of getting popped out due to shock of movement.
Kompact size / space saving in panels, mcc's & db's. As a result of patented contact construction & the quick make, quick break mechanism, the switch disconnector fuse unit are very compact.
Unique handle with unmatched standard
Provide Ip54 degree of protection.
Adjustable telescopic shaft.
Unbreakable engineering plasting moulded    handles.
Provisions for Defeating interlock.
Door interlocking in 'ON' position.
Padlocking facilities both in ON & OFF position.
  Range : Switch disconnector fuse units from 32A to 250A
  Available in isolable neutral switched neutral design.
  The unique contact system and quick Switching mechanism prevents contacts from opening at extreme fault currents.
  Fuse links remains isolated from both incoming and outgoing circuits, when the switch is in OFF position.
  Available with Knife fuse contacts & also bolted on request.
  Available in open execution and with enclosure.
  Can be mounted in vertical or horizontal position.
  Padlock, door interlock and defeat interlock provided.
  Ideally suited for power control centres (PCC).
  The Switch disconnector fuses are designed to perform as
  1. Main Switches
  2. Motor circuits switches (AC23 rating upto 660V)
  3. Isolator switches
  4. Local safety switches
  5. Special switches
  Ambient temp 60Oc, derating 20%, mounting on ceiling derating 10%, Mounting on wall, horizontal fuses, derating 8%.
  Max power dissipation of fuse link 16W.
  The capacitor rating of the switch disconnetor fuse units is limited by the fuse link.
  Some fuse links limit these further starting current characteristics must be considered separately.
  Max power dissipation 50w.
  UC-415V, at 660V max peak let through current is 8KA.
  Phase barrier & Terminal shrouds are standard accessories
  Maximum ground clearance.
  Strong Point
  Range: 32A to 250A TP/ TPN versions, 415V, 50Hz.
  Conforms to limit IS 13947-3 /IEC 947-3.
  Separate bridge for each pole.
  Separate arcing / current carrying zone.
  Clear on/off indicator.
Technical Data Switch Disconnector Fuse - Type FS - IS 13947-3 / IEC 947-3
Type Designation   FS32 FS63 FS100 FS125 FS160 FS200 FS250
Rated thermal current(Ith)(at 40OC) A 32 63 100 125 160 200 250
Rated operational voltage (Ue) V 415 415 415 415 415 415 415
Rated insulation voltage (Ui) V 1000 1000 1000 1000 1000 1000 1000
Rated impulse withstand voltage (Uimp) kV 8 8 12 12 12 12 12
Dialectric Strength 50Hz 1 min. kV 6 6 10 10 10 10 10
Rated frequency Hz 50-60 50-60 50-60 50-60 50-60 50-60 50-60
Conventional enclosed thermal current at 40OC(lthe) A 32 63 100 125 160 200 250
Rated operational current (le) @ 415V, A              
AC-21A utilization category A 32 63 100 125 160 200 250
AC-22A utilization category A 32 63 100 125 160 200 250
AC-23A utilization category A 32 63 100 125 160 200 250
Rated making capacity (415v, Cos =0.35)(0.45*) A(rms) 320* 630* 1000 1250 1600 2000 2500
Rated breaking capacity (415v, Cos =0.35)(0.45*) A(rms) 256* 504* 800 1000 1280 1600 2000
Rated fused short circuit current kA 80 80 80 80 80 80 80
Capacitor duty at 415V, 50-60Hz kVAR kVAR 15 30 45 55 57 90 110
Mechanical life (Operating cycles)   15000 15000 10000 10000 10000 10000 10000
Electrical life (Operating cycles)   1500 1500 1000 1000 1000 1000 1000
Terminal size mm 12x2 12x2 16x4 16x4 16x4 16x4 16x4
Terminal capacity mm2 25 25 70 95 95 185 185
Details of Hitech Fuses Suitable for Switch Disconnector Fuse Unit
Type designation of fuse
Size of fuse as per IS-13703 (Part I & II)   A1 A2 A3 A3 A4 B2 B3
Ratings of Indo hitech make fuses BS type available A 6-32 6-63 6-100 6-125 6-160 32-200 32-250
Ambient Temperature °C 40 40 40 40 40 40 40
Weight kg 1.1 1.1 3 3 3.5 5.3 5.5
Maximum Torque (On terminal bolt) Nm 4.5 4.5 9.0 9.0 20 20 20
Conformance to Standard IS 1347(Part 3). IEC60947-3,EN60947-3
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