FUSE SWITCH-DISCONNECTORS LTL4a SIZE 4a UP TO 1600 A
FUSE SWITCH-DISCONNECTORS LTL4a SIZE 4a UP TO 1600 A
FUSE SWITCH-DISCONNECTORS LTL4a SIZE 4a UP TO 1600 A
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Fuse switch-disconnectors<strong>FUSE</strong> <strong>SWITCH</strong>-<strong>DISCONNEC<strong>TO</strong>RS</strong> <strong>LTL<strong>4a</strong></strong> <strong>SIZE</strong> <strong>4a</strong> <strong>UP</strong> <strong>TO</strong> <strong>1600</strong> AFuse switch-disconnector <strong>LTL<strong>4a</strong></strong> is intended for fuse-linkswith blade contacts size <strong>4a</strong>. It enables safe disconnectionof rated current and overcurrent according to utilizationcategory and operating voltage. Basic part is made ofglass reinforced polyester. The material is resistant both tomechanical load and high temperature.Transparent cover is made of self-extinguishingpolycarbonate, and contains a mechanical interlock,which protects the cover against undesirable openingby dynamic forces arising at short-circuiting.High breaking capacity.Fuse switch-disconnector 1250 and <strong>1600</strong> ATypeProductcodeI n[A]VersionConnectionWeight[kg]<strong>LTL<strong>4a</strong></strong>-1x/1250/8 08213 1250 1-pole 1 x M16 5.600 1<strong>LTL<strong>4a</strong></strong>-1x/<strong>1600</strong>/8 14806 <strong>1600</strong> 1-pole 2 x M12 5.800 1Packing[pcs]<strong>LTL<strong>4a</strong></strong>-3x/1250/8 08211 1250<strong>LTL<strong>4a</strong></strong>-3x/<strong>1600</strong>/8 08714 <strong>1600</strong>3-pole, 1-polecontrolled3-pole, 1-polecontrolled1 x M16 16.800 12 x M12 17.300 1<strong>LTL<strong>4a</strong></strong>-3x3/1250/8 07886 1250<strong>LTL<strong>4a</strong></strong>-3x3/<strong>1600</strong>/8 08212 <strong>1600</strong>3-pole, 3-polecontrolled3-pole, 3-polecontrolled1 x M16 17.700 12 x M12 18.200 1E33
Fuse switch-disconnectors<strong>FUSE</strong> <strong>SWITCH</strong>-<strong>DISCONNEC<strong>TO</strong>RS</strong> <strong>LTL<strong>4a</strong></strong> <strong>SIZE</strong> <strong>4a</strong> <strong>UP</strong> <strong>TO</strong> <strong>1600</strong> AAccessoriesDescriptionFront cover position signalling, for LLT<strong>4a</strong>-3x...at closing, contacts 1 and 4 are closed (see the diagram for connection),in case of 3-pole control, it is installed in the central pole. For 1-polecontrol, the signalling is installed in each pole.TypeProductcodeWeight[kg]Packing[pcs]EMV-<strong>LTL<strong>4a</strong></strong> 10423 0.005 1Special active contacts Q enable safe handling the fuse switch-disconnectorsunder extreme conditions. It prevents the blade contacts getting in anintermediate position between “MAKE” and “BREAK” positions. It allows loaddisconnection in any state of the current circuit. (In order add “…/Q” afterthe type reference.)…/Q - 0.010 1E34
ParametersType <strong>LTL<strong>4a</strong></strong>…1250A <strong>LTL<strong>4a</strong></strong>…<strong>1600</strong>ARated operating voltage U e690 V 690 VRated operating current I e1250 A <strong>1600</strong> AUtilization category500 V a.c. AC-22B 400 V a.c. AC-21B690 V a.c. AC-21B 500 V a.c. AC-21B7500 A400 V a.c., cos φ = 0,357500 ARated making and breaking capacity3750 A500 V a.c., cos φ = 0,353750 A1875 A690 V a.c., cos φ = 0,351875 A1250 A220 V d.c., L/R = 15 ms<strong>1600</strong> AThermal current with fuse-link I th1250 A/500 V a.c.1000 A/690 V a.c.<strong>1600</strong> A/500 V a.c.1000 A/690 V a.c.Thermal current with disconnecting link I th1250 A <strong>1600</strong> ARated frequency f n40 ÷ 60 Hz 40 ÷ 60 HzRated insulation voltage U i750 V a.c. 750 V a.c.Rated conditional short-circuit current(rms)I cc500 V a.c. 80 kA400 V a.c. 120 kA690 V a.c. 50 kARated impulse withstand voltage U imp8 kV 8 kVRated short-time withstand current I cw1 s 30 kAFuse-link size <strong>4a</strong> <strong>4a</strong>Max. power losses of the fuse-link P v110 W 164 WPower losses at I thwithout fuse-link P v67 W 67 WElectrical durability operating cycles 200 200Mechanical durability operating cycles 1000 1000Degree of protection from the front side, built-in device, cover closed(without measuring holes broken off)IP 20 IP 20Degree of protection from the front side, built-in device,cover open or removedIP 20 IP 20Operating ambient temperature - 25÷ + 55 °C - 25 ÷ + 55 °CAltitude above sea level max. 2000 m 2000 mPollution degree 3 3Overvoltage category for 690 V a.c. III IIISeismic resistance per VE ŠKODA 3 g/8 ÷ 50 Hz 3 g/8 ÷ 50 HzTorque 50 ÷ 60 Nm 30 ÷ 45 NmStandardsApproval marksDimensionsFuse switch-disconnectors<strong>FUSE</strong> <strong>SWITCH</strong>-<strong>DISCONNEC<strong>TO</strong>RS</strong> <strong>LTL<strong>4a</strong></strong> <strong>SIZE</strong> <strong>4a</strong> <strong>UP</strong> <strong>TO</strong> <strong>1600</strong> AIEC 60947-1, -3EN 60947-1, -3217.5IEC 60947-1, -3EN 60947-1, -3EN 60947-3 ed. 2/A2, p. C.5 Instructions for the use of 1-pole controlled devices states:These devices are intended for distribution systems with possible necessity of switching and/or safe disconnection of individual phases, and must not be used for switching a primary circuit of a three-phase equipment.96 31280EMV-<strong>LTL<strong>4a</strong></strong>185350346338.5350346338.5339270205115851081166108 1083013243322640M16 x 6013154.5445E35
Fuse switch-disconnectors<strong>FUSE</strong> <strong>SWITCH</strong>-<strong>DISCONNEC<strong>TO</strong>RS</strong> <strong>LTL<strong>4a</strong></strong> <strong>SIZE</strong> <strong>4a</strong> <strong>UP</strong> <strong>TO</strong> <strong>1600</strong> ADimensionsDrilling plansTerminals switch-disconnectors1 – pole 3 – pole459451330253025772513921625025551822.5671422221450 50ClearanceI = 1250AnI = <strong>1600</strong>An1 – pole 3 – pole172.5328328109325Remote signalling of cover position of 1-poleand 3-pole switch-disconnectorsState of contacts with closed cover:contacts 1 – 4 closed1425 A/250 V a.c.0.2 A/250 V d.c.E36
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