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Switch disconnectors and fuses
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Table of Contents

Switch Disconnectors and
Fuses
7/2
Introduction
SENTRIC switch disconnectors
SENTRIC LD main control and
EMERGENCY-STOP switches from
16 A to 125 A
7/4
General data
7/5
Front mounting
7/7
Mounting in distribution boards
7/8
Molded-plastic enclosures
7/10
Accessories
SENTRIC K
switch disconnectors from 63 A to
1000 A
7/12
General data
7/14
Base mounting
7/15
Molded-plastic enclosures
7/16
Accessories
SENTRIC NP fuse switch disconnec-
tors
7/17
General data
7/20
For power distribution
7/21
Accessories
SENTRIC KL switch disconnectors
with fuses
7/22
General data
7/24
Surface and flush mounting
7/26
Accessories
Fuses and fuse systems
7/28
Introduction
7/29
SITOR semiconductor protection fuses
7/33
NEOZED fuses
7/36
DIAZED fuses
7/39
LV HRC fuses
7/48
Cylindrical fuses
Siemens LV 10 · 2004

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  • Page 1 7/22 General data 7/24 Surface and flush mounting 7/26 Accessories Fuses and fuse systems 7/28 Introduction 7/29 SITOR semiconductor protection fuses 7/33 NEOZED fuses 7/36 DIAZED fuses 7/39 LV HRC fuses 7/48 Cylindrical fuses Siemens LV 10 · 2004...
  • Page 2 Switch accessories 4th pole (N conductor) (leading switch-on, delayed switch-off contact) N terminal PE/ground terminal Auxiliary contacts 1 NO + 1 NC 1 NO 1 NC Siemens LV 10 · 2004 3LD20 3LD21 ✓ ✓ ✓ ✓ ✓ ✓ ✓...
  • Page 3 – ✓ ✓ ✓ – ✓ – – ✓ ✓ ✓ Introduction 63 ... 1000 ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ – ✓ – ✓ ✓ ✓ ✓ ✓ ✓ Siemens LV 10 · 2004...

  • Page 4: Sentric Switch Disconnectors

    (HP = PS) Conductor cross-sections copper cable Tightening torque 1) With appropriate operating mechanisms according to DIN VDE 0113 (see selection and ordering data). Siemens LV 10 · 2004 DIN VDE 0660, IEC 60947 Type 3LD2 0 AC V 50 ... 60...

  • Page 5: Front Mounting

    ■ Area of application The SENTRIC 3LD2 switches are used for switching main control and auxiliary circuits, but they are also implemented for switch- ing three-phase induction motors and other loads for mainte- nance and repair. They can be used as •...
  • Page 6 • black actuator, IP65 degree of protection at the front – 3LD2 123-7UK01 Actuator black red/yellow (EMERGENCY-STOP) Siemens LV 10 · 2004 Rated data Order No. at 50 Hz ... 60 Hz 380 V ... 440 V AC-3 3LD2 103–3VK..

  • Page 7: Mounting In Distribution Boards

    1 unit 3LD9 280–0C 1 unit 3LD2 830–0TK.. 1 unit 3LD9 280–0C 1 unit > Mounting in distribution boards 0.169 0.171 0.168 0.311 0.379 0.379 0.183 0.171 0.039 0.168 0.039 0.311 0.080 0.379 0.102 0.379 0.102 Siemens LV 10 · 2004...
  • Page 8 (EMERGENCY-STOP) 1) 4th contact as N-conductor to be ordered separately; see Accessories for base mounting and distribution board mounting. Siemens LV 10 · 2004 Rated data Order No. at 50 Hz ... 60 Hz 380 V ... 440 V AC-23A –...
  • Page 9 22.0 3LD2 566–7UB01 30.0 37.0 3LD2 766–7UB01 Molded-plastic enclosures Weight per PU approx. 1 unit 0.880 1 unit 0.878 1 unit 2.100 1 unit 0.888 1 unit 0.888 1 unit 2.100 1 unit 2.330 > Siemens LV 10 · 2004...
  • Page 10 1 NO + 1 NC 1 NO 3LD9 2.0-2C 1 NC Labelling plate English/German 7/10 Siemens LV 10 · 2004 3LD2 0 Weight per PU approx. Order No. – 3LD9 200–2B 1 unit 0.030 3LD9 220–5B...
  • Page 11 1 unit 0.006 – – 3LD9 280–0C 1 unit 0.102 3LD9 280–2C 1 unit 0.093 3LD9 280–5C 1 unit 0.047 3LD9 280–3C 1 unit 0.029 3LD9 280–4C 1 unit 0.029 3LD9 286–1A 1 unit 0.005 Siemens LV 10 · 2004 7/11...
  • Page 12 SENTRIC Switch Disconnectors SENTRIC K Switch Disconnectors from 63 A to 1000 A General data ■ Technical specifications Standards Type Rated uninterrupted current I Continuous thermal current I Rated insulation voltage U Rated impulse withstand voltage U Rated operating voltage U...
  • Page 13 Weight Complete version Basic version 1) Technical specifications for CSA approval on request. SENTRIC Switch Disconnectors SENTRIC K Switch Disconnectors from 63 A to 1000 A IEC 60947-1, IEC 60947-3, VDE 0660 Part 107 3KA50 3KA51 3KA52 operations...

  • Page 14: Base Mounting

    SENTRIC Switch Disconnectors SENTRIC K Switch Disconnectors from 63 A to 1000 A Base mounting ■ Area of application SENTRIC KA switch disconnectors are implemented as main control switches and EMERGENCY-STOP switches for normal switching duty and isolation of main circuits and auxiliary cir- cuits.
  • Page 15 3) For ambient temperatures up to 35 °C. * This quantity or a multiple thereof can be ordered. SENTRIC Switch Disconnectors SENTRIC K Switch Disconnectors from 63 A to 1000 A ■ Area of application Our master and EMERCENCY-STOP switches provide absolute safety, even during maintenance and repair work.
  • Page 16 SENTRIC Switch Disconnectors SENTRIC K Switch Disconnectors from 63 A to 1000 A Accessories ■ Selection and ordering data Terminal cover (1 set = 6 units) for 3-pole devices (1 set = 8 units) for 4-pole devices 3KX3 552–3DA01 Door-coupling rotary operating...
  • Page 17 They are designed to connect the specified rated nominal current (including a specified overload), to carry it and to disconnect it. SENTRIC NP fuse switch disconnectors are used to isolate all poles of downstream electrical loads safely under load conditions.
  • Page 18 4) For safety monitoring max. 690 V. 5) For pollution severity 2, the switch disconnectors can be used up to 1000 V AC-20 B, DC-20 B (no-load switching). 6) Conducting paths in series: 3 at 3NP40; 2 at 3NP42, 3NP43 and 3NP44.
  • Page 19 (M 12) 70 ... 150 120 ... 240 150 ... 300 22–30 × 5–10 22–30 × 5–10 25–40 × 5–10 up to 16 × 8 up to 20 × 10 up to 24 × 10 Siemens LV 10 · 2004 7/19...

  • Page 20: For Power Distribution

    Rittal PLS systems 3NP40 16 3NP42 76 For all fuse switch disconnectors with flat connection, the appro- priate cable lug covers (3NY7 101 to 3NY7 141) must be used for finger-safe cover acc. to VBG4, see Accessories. 1) For fuse links, see BETA protect installation equipment.
  • Page 21 1 m cable with plug 3 m cable with plug 1) The fuse switch disconnector can be used in the meter cabinet with the cable lug cover mounted in combination with molded-plastic masking frames for the distribution board or switchpanel or the incoming-feeder panel without any problems.
  • Page 22 3) Configuring note: max. permissible operating temperature for fuse blades 135°C, for connections 100 °C. 4) 3ND1 switchgear protection fuses. 7/22 Siemens LV 10 · 2004 For use in the paper and pulp processing industry, a special variant that is resistant to strongly sulphurous atmospheres can be supplied.
  • Page 23 M 12 M 12 20 × 2.5 – – – – – – – – 25 × 4 – – – – 5.700 – – 7.450 – – 4.800 14.000 14.000 6.443 – – Siemens LV 10 · 2004 7/23...

  • Page 24: Surface And Flush Mounting

    1) Silver-plated fuse blade. Silver-plated isolating links can be used if desired. 2) When using SITOR semiconductor protection fuse inserts, see page 7/29. 7/24 Siemens LV 10 · 2004 DT Complete version with 8UC6 door-coupling rotary operating Opera- mechanism...
  • Page 25 8UC62 22–3BB20 1 unit 0.426 8UC62 22–3BB20 1 unit 0.426 8UC62 22–3BB20 1 unit 0.426 8UC63 23–3BB30 1 unit 0.999 8UC63 23–3BB30 1 unit 0.999 8UC64 24–3BB44 1 unit 1.180 +8UC92 53 1 unit 0.115 Siemens LV 10 · 2004 7/25...
  • Page 26 Fuse monitor connection 3SB14 00–0A (1 set = 6 units) 1) For further 3SB14 00–0 switching elements with other contact types, see “Pushbuttons and Indicator Lights". 7/26 Siemens LV 10 · 2004 3KL50 30 Weight per PU approx. Order No.
  • Page 27 ■ Circuit diagrams Internal circuit diagram for SENTRIC KL (for 3KL50 and 3KL51, only one auxiliary switch possible, not included in scope of supply; 4th pole is possible as main contact) Internal circuit diagram for SENTRIC KL (auxiliary switch not included in scope of supply) used with direct voltage at DC-23A 440 V Siemens LV 10 ·...
  • Page 28 Mounting position Climatic stability °C Non-interchangeability 7/28 Siemens LV 10 · 2004 Sizes The sizes of low-voltage fuses and, for example, the non-inter- changeability for operation by the non-specialists are defined in DIN VDE 0636. • NEOZED fuses are available in sizes D01, D02 and D03 •...
  • Page 29 1) If a cyclic load is applied, it may be necessary to further reduce the cur- rents (please inquire about precise values). 2) Values in brackets apply to the SENTRIC 3NP4 fuse switch disconnector. * This quantity or a multiple thereof can be ordered.
  • Page 30 1) If a cyclic load is applied, it may be necessary to further reduce the cur- rents (please inquire about precise values). 2) Values in brackets apply to the 3NP4 fuse switch disconnector. 3) Values in brackets apply to the 3KL5/3KM5 switch disconnectors.
  • Page 31 2) If overvoltage category 2 (instead of 3) and pollution degree 2 (instead of 3) in accordance with EN 60947-1 is maintained, the rated insulation volt- age of the SENTRIC 3NP switch disconnectors also amounts to = 1000 V. 3) Due to the mechanical stress on the relatively long fuse blades, 3NE41 SITOR semiconductor protection fuses should be switched only occasionally and only at zero current.
  • Page 32 Introduction For switch disconnectors Type Type Permissible load cur- rent of the SITOR semiconductor protec- tion fuse in the switch disconnector For SENTRIC 3KL5, 3KL6 and 3KM5 switch disconnectors with fuses 3KL50 3KM50 3KL52 3KM52 3KL55 3KM55 3KL55 3KM55 3KL57...

  • Page 33: Neozed Fuses

    Single-pole + N 2-pole 3-pole 3-pole + N Auxiliary switch for MINIZED D02 switch disconnector for contact position indica- tion and for retrofitting on the right-hand-side using factory-fitted terminals Contact: AC 230 V, 6 A AC 24 V, 50 mA...
  • Page 34 Spade terminals, insulated Single-phase D01/D02 3-phase D01/D02 D01/D02 Male contacts, insulated Single-phase D01/D02 3-phase D01/D02 7/34 Siemens LV 10 · 2004 Size For fuses up to 2 ... 16 Length Conductor Load rating cross-section up to terminals approx. mm 1000...
  • Page 35 5SE2 320 10 units 0.012 5SE2 325 10 units 0.013 5SE2 235 50 units 0.014 5SE2 335 10 units 0.014 5SE2 340 10 units 0.014 5SE2 350 10 units 0.015 5SE2 363 10 units 0.016 Siemens LV 10 · 2004 7/35...

  • Page 36: Diazed Fuses

    DIAZED fuse base, AC/DC 750 V DIII AC/DC 750 V DIAZED guide screw key DII/DIII Suitable up to AC/DC 750 V 7/36 Siemens LV 10 · 2004 Rated current Conductor Base Thread cross-section width up to mm E 16...
  • Page 37 5 units 0.026 5SB2 11 5 units 0.026 5SB2 21 5SB2 31 5 units 0.026 5SB2 51 5 units 0.027 5SB2 61 5 units 0.028 5SB2 71 5 units 0.029 5SB2 81 5 units 0.031 Siemens LV 10 · 2004 7/37...
  • Page 38 SILIZED fuse links AC 500 V, DC 500 V, yellow ring Operational class gR, super-quick DIII For 5SD4 80, the DIAZED guide screw 5SH3 16 for 25 A is used 7/38 Siemens LV 10 · 2004 Rated current Identification Thread color black...

  • Page 39: Lv Hrc Fuses

    4.800 1 unit 5.200 0.013 20 units 10 units 0.010 20 units 0.027 20 units 0.031 20 units 0.038 20 units 0.025 10 units 0.050 20 units 0.053 10 units 0.066 10 units 0.101 Siemens LV 10 · 2004 7/39...
  • Page 40 Fuse puller For LV HRC fuse links Without cuff With cuff Disconnecting blade With insulated grip lugs, silver-plated, for LV HRC fuse bases and fuse switch dis- connectors With non-insulated grip lugs, size 4 tin-plated, size 4a nickel-plated Fuse base cover For LV HRC fuse bases according to DIN 43620 Red with yellow label "Supply isolation point"...
  • Page 41 3NA6 240 3 units 0.450 3NA6 242 0.450 3 units 3NA6 244 3 units 0.450 3NA6 250 3 units 0.650 3NA6 252 3 units 0.660 3NA6 254 3 units 0.660 3NA6 260 3 units 0.660 Siemens LV 10 · 2004 7/41...
  • Page 42 47.2 mm 57.8 mm Characteristics are available on the Internet at www.siemens.de/installationstechnik 7/42 Siemens LV 10 · 2004 Rated current I Rated voltage U AC 400 V, DC 250 V AC 400 V, DC 250 V AC 400 V, DC 250 V AC 400 V, DC 250 V * This quantity or a multiple thereof can be ordered.
  • Page 43 3NA6 236-6 3 units 0.450 0.426 3NA6 240-6 3 units 0.450 0.426 3NA6 242-6 3 units 0.660 0.426 3NA6 244-6 3 units 0.660 0.426 3NA6 250-6 3 units 0.660 0.660 3NA6 252-6 3 units 0.660 Siemens LV 10 · 2004 7/43...
  • Page 44 30 mm 47.2 mm Characteristics are available on the Internet at www.siemens.de/installationstechnik 7/44 Siemens LV 10 · 2004 Rated current I Rated voltage U AC 500 V, DC 250 V AC 500 V, DC 250 V AC 500 V, DC 440 V AC 500 V, DC 440 V * This quantity or a multiple thereof can be ordered.
  • Page 45 3NA3 480 1 unit 2.500 3NA3 482 1 unit 2.500 3NA3 665 1 unit 2.700 3NA3 672 1 unit 2.700 3NA3 675 1 unit 2.700 3NA3 680 1 unit 2.840 3NA3 682 1 unit 2.840 Siemens LV 10 · 2004 7/45...
  • Page 46 30 mm 46 mm 57 mm 71.2 mm Characteristics are available on the Internet at www.siemens.de/installationstechnik 7/46 Siemens LV 10 · 2004 Rated current I Rated voltage U AC 500 V AC 500 V AC 690 V AC 690 V AC 690 V * This quantity or a multiple thereof can be ordered.
  • Page 47 3NA3 252-6 3 units 0.680 3NA3 344-6 3 units 0.660 3NA3 352-6 3 units 0.660 3NA3 354-6 3 units 1.000 3NA3 360-6 3 units 1.000 3NA3 362-6 3 units 1.000 3NA3 365-6 3 units 1.000 Siemens LV 10 · 2004 7/47...

  • Page 48: Cylindrical Fuses

    With signaling output Single-pole Single-pole + N 2-pole 3-pole 3-pole + N 7/48 Siemens LV 10 · 2004 Rated current I For fuses of size mm x mm 8.5 x 31.5 10 x 38 14 x 51 22 x 58 8.5 x 31.5...
  • Page 49 3NW8 212-1 10 units 0.051 0.051 3NW8 217-1 10 units 0.051 0.051 3NW8 220-1 10 units 0.051 0.051 3NW8 222-1 10 units 0.051 0.051 3NW8 224-1 10 units 0.051 0.051 3NW8 230-1 10 units 0.051 Siemens LV 10 · 2004 7/49...
  • Page 50 Fuses and Fuse Systems Notes 7/50 Siemens LV 10 · 2004...

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