Fuse protection The solution for > Live maintenance of speed drives supplied by a common DC bus > Live maintenance of PV inverters connected in parallel on a same circuit fuser-lm_2_a Strong points > Compact > Automatic pre-load > Integrated fuse protection Function FUSERBLOCs LMDC are designed to perform the maintenance of DC/AC speed drives or PV inverters without stopping the entire installation. This multifunctional device for performing maintenance work on a branch of the electrical system while leaving the rest of the equipment energised. FUSERBLOCs LMDC ensure a safe charge of capacitive loads by limiting high inrush current during power-up of the branch and thus reducing stress to components. Conformity to standards > IEC 6947- Advantages Compact Isolation, protection and precharge of capacitive loads within a single device. Automatic pre-load After maintenance operations, the pre-load of inverters capacitors will be managed automatically through a coil. Integrated fuse protection Semiconductors protection is integrated to the switch (no additional space is required). Characteristics 25 to 6 A DC2 2 General Catalogue 26-27
References External / direct operation 25 to 6 A Rating (A) No. of main poles 25 A 2 6 A 2 25 A 2 4 A 2 6 A 2 Fuse size of main poles DIN 462 DIN 462 DIN 462 2 DIN 462 DIN 462 9 A 2 KN/ A 4 (2 //) DIN 462 6 A 4 (2 //) KN/ Pre-charge poles (DIN 462) 2 x 6 A 2 x 6 A 2 x 6 A 2 x 6 A 2 x 6 A 2 x 6 A 2 x 6 A 2 x 6 A Reference External front handle Direct front handle Shaft for external front handle Auxiliary contacts Terminal shrouds 8DR 22 ()(2) S type 998 26 (4) 8DR 26 ()(2) Black IP65 Black 4 899 6 998 225 (4) 8DR 225 ()(2) Red/Yellow IP65 44 () Coil must be ordered separately. (2) Include standard fuse protection cover. If fuse microswitch is used please use specific fuse protection cover. () Max 8 contacts (4 already provided with the switch). (4) IP2 kit, please consult us. 2 mm 4 22 U type 8DR 24 ()(2) contact NC 2 mm 999 7 () 898 28 4 22 8DR 26 ()(2) S4 type contact NO Black IP65 5 mm 999 72 Black () 8DR 29 ()(2) 44 4 25 898 22 899 7 8DR 4 ()(2) Red/Yellow 898 25 IP65 8DR 46 ()(2) 444 898 26 Characteristics according to IEC 6947- Products 25 A 6 A 25 A 4 A 6 A 9 A A 6 A size 2 No. of main poles 2 2 2 2 2 2 4 (2 //) 4 (2 //) Fuse size of main poles / / 2 2 / K / K / Thermal current I th at 4 C (A) 25 6 25 4 6 9 6 Rated insulation voltage U i (V) 25 25 25 25 25 Rated impulse withstand voltage U imp (kv) 8 8 8 2 2 2 2 2 Load duty category DC-2 DC-2 DC-2 DC-2 DC-2 DC-2 DC-2 DC-2 Fuse protected short-circuit withstand Current peak value: withstand and making (peak ka) 5 5 5 5 5 5 5 5 Prospective short-circuit current (ka rms) () 22.7 2.5 4 7 7 9 7 9 Heat dissipation Maximum fuse dissipation per pole (W) 7.7 5. 29. 56.9 7 8 7 8 Maximum switch dissipation per pole (W) 6. 6.5.6 46 6 52 54 Fuse size of pre-charge poles (DIN 462) Number of pre-charge poles 2 2 2 2 2 2 2 2 Thermal current I th at 4 C (A) 6 6 6 6 6 6 6 6 Rated insulation voltage U i (V) (operation circuit) Rated impulse withstand voltage U imp (kv) (operation circuit) 8 8 8 8 8 8 8 8 Fuse protected short-circuit withstand Current peak value: withstand and making (peak ka) Prospective short-circuit current (ka rms) () 2 2 2 2 2 2 2 2 Heat dissipation Maximum fuse dissipation per pole (W) 2 2 2 2 2 2 2 2 Maximum switch dissipation per pole (W) 6. 6. 6. 6. 6. 6. 6. 6. Mechanical characteristics Endurance (number of operating cycles) (2) 5 5 5 5 5 5 5 5 () Ue 4 VAC with gg fuses (AC value for information only). (2) max./hour. General Catalogue 26-27
Accessories Coils kit Use Accessory required for the good functioning of the product. Voltage Reference 24 VDC 8DR C24 2 VAC 8DR A2 acces_8_a_2_cat Specific protective covers for fitted fuse blown microswitch Product NFC/DIN fuse size No. of poles Reference 25 A 2 99 75 6 A 2 99 724 25 A 2 2 99 79 4 A 2 89 76 6 A 2 89 764 9 A 2 standard A 4 (2 //) 89 96 6 A 4 (2 //) standard acces_22_a_2_cat Solid links Product NFC/DIN fuse size No. of poles Reference 25 A 2 642 6 A 2 642 25 A 2 2 642 2 4 A 2 642 6 A 2 642 9 A 2 consult us A 4 (2 //) 642 6 A 4 (2 //) consult us fusib_24_a cat 4 General Catalogue 26-27
Operating diagram Pre-load auxiliary contact 54-5 64-6 Auxiliary contact -2 2-22 MANUAL - Step Coill & auxiliary contact Additional auxiliary contact 24 Vdc / 2 Vac L L2 P P2 54 64 64 54 2 22 6 5 2 fuser-lm_8_a gb_cat 2 2 22 5 6 MANUAL - Step 2 Coill & auxiliary contact Additional auxiliary contact 24 Vdc / 2 Vac L L2 P P2 54 64! PRE-LOAD POSITION 64 54 6 5 2 22 2 DO NOT OPERATE TO fuser-lm_9_a gb_cat 2 2 22 5 6 POSITION OFF AUTO - Step Coill & auxiliary contact Additional auxiliary contact 24 Vdc / 2 Vac L L2 P P2 54 64 64 54 2 22 6 5 2 fuser-lm a gb_cat 2 2 22 5 6 General Catalogue 26-27 5
Operating diagram (continued) and auxiliary contacts OFF PRE-LOAD ON OFF L / L2 P / P2 COIL AUX 6-64 fuser-lm_7_c gb_cat AUX 5-54 Dimensions DC switches 25 to 25 A A K K2 Terminal shroud J J B K H 22 K A L 45 C fuser-lm a gb_cat.eps Rating (A) Unit A A B C H J J K K K2 K L 25 in 6 48 2.59 7.55.4.4.6 6.5 -.8.2 mm 27 229 2 78 268 6 6 295 6.5-8 8.2 6 in 2.87.2 2.59 7.7.58 2.6.4.6 4.7 4.5 5.5.2 mm 27 284.5 2 96.5 45 6 6 295 6 4.5 4 8.2 25 in..5 2.59 7.85 4. 2.59.4.6 4.7 4.5 5.5.2 mm 288.5 2 99.5 59 66 6 295 6 4.5 4 8.2 6 General Catalogue 26-27
DC switches 4 to 6 A 4 to 9 A A Connection terminals K K2 K 4 to 6 A 9 A J J 5 25.5 B K 45 2 Ø fuser-lm_2_a.eps 25 4 77 2 fuser-lm_2_a.eps to 6 A K K2 K J A J Terminal shroud L A B K H 22 A L 45 C fuser-lm_4_a gb_cat.eps Rating (A) Unit A A B C H J J K K K2 K L 4 6 in 4.44.75.8 9.84 8.54.7.4 9.84.4 7.48..5 mm 67 49.5 25 47 94 6 25 9 4 9 9 in 6.49 5.8.8.25 7.7 4.72.4 9.84.4 9.52..5 mm 49 4.5 286 45.5 2 6 25 242 4 9 in 2.85 2.6.7 9.84 8.54 7.4.4 9.84.4 4.88..5 mm 555 57.5 48 25 47 88 6 25 78 4 9 6 in 25.94 25.25.7.25 7.7 9.44.4 9.84.4 8.97..5 mm 659 64.5 48 286 45.5 24 6 25 482 4 9 General Catalogue 26-27 7