SI TRUE DC Solar Isolator Brighter Solutions
AC vs DC Safe Switching As any electrician is aware the nature of DC switching has to be considered with care because on disconnection an arc can occur that is more arduous than that produced with an AC load because there is no zero point on DC. The nature of this arc means that design considerations have to be made within the switch in order to quench this phenomenon; that not only includes significant contact gaps with high speed of operation, but also thermal transmissive materials.
Utilisation Categories Utilisation Categories as are covered in the European Standards EN 60947-1 & EN60947-3 and define an equipment’s intended application. The list of both AC and DC categories for low-voltage switchgear and controlgear are stated in EN 60947-1 Annex A along with the relevant product standards.
PV Installation Isolation PV installations consist of the DC side, the Inverter and the AC side with isolation required for both the PV-array to the inverter and for the AC supply from the load, particularly where the system is connected to the Distributed Network, this is a stipulation in G83/1.
Why use an IMO DC Solar Isolator? IMO Precision Controls offers a range of True DC Isolators specifically designed for use in Solar PV installations in accordance with EN 60364-7-712. The IMO design incorporates a user independent switching action so as the handle is moved it interacts with a spring mechanism which, upon reaching a set point, causes the contacts to “SNAP” over thereby ensuring a very fast break/make action.
It is because of this that the IMO Solar Isolator range is constructed of materials that significantly reduce the risk of a fire hazard and in particular our enclosed installation style products for which the main plastic enclosure is rated at UL 94V-0 and the handles are UL 94V-2 rated. The classification criteria for each of these ratings is found in of the UL 94 Table 8.1 (see extract below).
Dual String System – 5kW Output Single Phase Consider a typical 5kW system which would supply 22A at 230VAC: Inverter: Input (per string): 600VDC (VOC), 18A (IDC), 36A (IDC max) Output: 230VAC (VAC), 25A (IAC max) Solar Panel: 64.9V (VOC), 6.46A (ISC), 5.98A (Impp), 327Wp (Pnom) No. of panels: Calculation: V = 8 x 64.9 x 1.15 = 597.08V 8 per string I = 6.46 x 1.25 = 8.
Over 5 Million Installed Units ZERO FAILURES In solar installation, the DC isolator is like a vehicle air-bag. You never know it really works until you need it. So it’s good to know that the IMO SI has now surpassed five million installed units without a single recorded failure. Not surprising considering the product carries all the most important approvals including UL508i, TUV (IEC 60947-1 & IEC 60947-3), CE and CCC.
SI Solar Isolators TRUE DC Isolators for PV Systems n Market-leading design n 2, 4, 6 & 8 pole versions available n Max. rated current 85A@1000VDC (acc.
Ordering Variations Lever Handle Models Panel Mount (4-screw) 64 x 64 Estcutcheon Plate Lever Handle, IP66, NEMA 3R Single Hole Mount (22.5mm) 48 x 48 Escutcheon Plate Lever Handle, IP66, NEMA 4X Base Mount (door coupling) 64 x 64 Escutcheon Plate Lever Handle, IP66, NEMA 4X Modular Switch Lever Handle, IP40, NEMA 1 SI**PM64* SI**SHM* SI**BMDC64* SI**DB* Lever Handle Models with Lockable OFF Panel Mount (4-screw) 64 x 64 Estcutcheon Plate Lockable Lever Handle, IP66, NEMA 3R Single Hole Mount (22.
Switching Configurations 2-pole 4 parallel poles 2-pole 4 poles in series Input on top Output bottom 2-pole 4 poles in series Input and Output on top 2-pole SI16 2 2H 4 4S 4T 4B SI25 2 2H 4 4S 4T 4B SI32 2 2H 4 4S 4T 4B SI38 2 2H 4 4S 4T 4B SI40 2 2H 4 4S 4T 4B SI55 2 2H 4 4S 4T 4B Contacts Wiring Diagram Switching example 4-pole 2-pole 4 poles in series Input and Output bottom Type 1 3 1 3 5 7 1 3 5 7 1 3 5 7 1 3 5 7 1 3 5 7 2 4 2
Technical Data for DC according to IEC 60947-3 DC21B (DC-PV1) Type 2 poles in series 1 2 2 poles in series + 2 parallel 1 3 2 600V 700V 800V 900V 1000V 1200V 1500V 500V 600V 800V 16A 16A 16A 16A 16A 10A 7A 3A 7A 5.5A 2A 1A SI25 .. 25A 25A 25A 20A 17A 11.5A 8.5A 5A 8A 6A 2.5A 1.5A 32A 23A 20A 13A 10A 6A 9A 6.5A 3A 2A 29A 11A 7.5A 10A SI32 .. 32A 32A SI38 .. 45A 45A SI40 ..
Technical Data Data according to IEC 60947-3, VDE 0660, GB14048.3 Type SI16 SI25 SI32 SI38 SI40 Rated thermal current Ithe Main Contacts A 16 25 32 45 40 55 Rated insulation voltage Ui 1) V 1000 1000 1000 1000 1500 1500 V 1500 1500 1500 1500 1500 1500 mm 8 8 8 8 Rated insulation voltage Ui 2) Distance of contacts (per pole) 300V A 16 1 pole 400V A 12 14 14 22 16 25 30 33 40 44 1 500V A 9 10 11 17 13 20 19 24 25 32 12 10 15 15 19 20 25 7.
Technical Data continued Data according to IEC 60947-3, VDE 0660, GB14048.3 Main Contacts Rated operational current Ie 1 pole 1 DC-PV1 1 2 poles in series 2 1 2 2 poles in series + 2 poles parallel 2H 1 3 2 4 3 poles in series + 2 poles parallel 3H 1 2 3 4 5 6 4 poles in series 4S 1 2 3 4 4 poles in series + 2 poles parallel 4H 14 1 2 3 4 5 6 7 8 8 www.imopc.
Technical Data continued Data according to IEC 60947-3, VDE 0660, GB14048.3 Main Contacts Rated operational current Ie 1 pole 1 DC-PV2 1 2 poles in series 2 1 2 2 poles in series + 2 poles parallel 2H 1 3 2 4 3 poles in series + 2 poles parallel 3H 1 2 3 4 5 6 4 poles in series 4S 1 2 3 4 4 poles in series + 2 poles parallel 4H 1 2 3 4 5 6 7 8 8 www.imopc.com Type SI16 SI25 SI32 SI40 SI55 300V 400V A A 16 15 23 18 27 20 40 30 55 40 500V 600V 700V A A A 10 5 1.
Technical Data continued Data according to IEC 60947-3, VDE 0660, GB14048.3 Main Contacts Type SI16 SI25 SI32 SI40 SI55 500V A 1 1.25 1.5 x 2.5 1 pole 600V A 0.5 0.75 1 x 2 1 800V A 0.3 0.4 0.5 x 1.5 1000V A 0.15 0.2 0.25 x 1 Rated operational current Ie DC22B 1 SI38 1200V A - - - x x 1500V A - - - x x 2 poles in series 500V A 7 8 9 x x 2 600V A 5.5 6 6.5 x x 800V A 2 2.5 3 x x 1000V A 1 1.
Technical Data continued Data according to UL508i File E362605 and UL508 Main Contacts Ampere-Rating “General Use” 1 1 1 3 2 1 pole 1 2 poles in series 2 2 poles in series + 2 poles parallel 2H 2 4 4 poles in series 4S 1 2 3 4 1 2 3 4 5 6 1 2 3 4 5 6 7 8 3 poles in series + 2 poles parallel 3H 4 poles in series +2 poles parallel 4H AC Rating “General Use” 2 poles in series 2 poles in series + 2 poles parallel 1 2 1 3 2 4 3 poles parallel Fuse size (RK5) Industrial Cont
Technical Data continued Switch SI16 2H all types except PEL64R Ie / DC21B / DC-PV1 500V / 2.5mm2 600V / 2.5mm2 700V / 2.5mm2 800V / 2.5mm2 900V / 2.5mm2 1000V / 1.5mm2 1200V / 1.5mm2 1500V / 1.5mm2 500V / 6mm2 600V / 6mm2 700V / 4mm2 800V / 2.5mm2 900V / 2.5mm2 1000V / 1.5mm2 1200V / 1.5mm2 1500V / 1.
Technical Data continued Switch SI25 2H all types except PEL64R Ie / DC21B / DC-PV1 500V / 4mm2 600V / 4mm2 700V / 4mm2 800V / 2.5mm2 900V / 2.5mm2 1000V / 1.5mm2 1200V / 1.5mm2 1500V / 1.5mm2 500V / 10mm2 600V / 10mm2 700V / 6mm2 800V / 2.5mm2 900V / 2.5mm2 1000V / 1.5mm2 1200V / 1.5mm2 1500V / 1.
Technical Data continued Switch SI32 2H all types except PEL64R Ie / DC21B / DC-PV1 500V / 6mm2 600V / 6mm2 700V / 6mm2 800V / 4mm2 900V / 2.5mm2 1000V / 2.5mm2 1200V / 1.5mm2 1500V / 1.5mm2 500V / 16mm2 600V / 16mm2 700V / 6mm2 800V / 4mm2 900V / 2.5mm2 1000V / 2.5mm2 1200V / 1.5mm2 1500V / 1.
Technical Data continued Switch SI40 2H all types except PEL64R Ie / DC21B / DC-PV1 500V / 10mm2 600V / 10mm2 700V / 10mm2 800V / 10mm2 900V / 6mm2 1000V / 6mm2 1200V / 1.5mm2 1500V / 1.5mm2 500V / 16mm2 600V / 16mm2 700V / 10mm2 800V / 10mm2 900V / 6mm2 1000V / 4mm2 1200V / 1.5mm2 1500V / 1.
Technical Data continued Switch SI55 2H all types except PEL64R Ie / DC21B / DC-PV1 500V / 16mm2 600V / 16mm2 700V / 16mm2 800V / 16mm2 900V / 10mm2 1000V / 10mm2 1200V / 2.5mm2 1500V / 1.5mm2 500V / 16mm2 600V / 16mm2 700V / 16mm2 800V / 16mm2 900V / 10mm2 1000V / 10mm2 1200V / 2.5mm2 1500V / 1.
Dimensions (mm) SI16PM / SI25PM / SI32PM / SI38PM 2 2H, 4 SI16PM / SI25PM / SI32PM / SI38PM 6, 3H, 8, 4H SI + X “Y” Extended Switch Shaft 1,2 - 1,4 Nm SI40PM / SI55PM 2, 2H, 4 Escutcheon Plate 64 Lever SI40PM / SI55PM 6, 3H, 8, 4H Lockable Lever Mounting Hole Lockable Rotary Panel Mounting Sealing for abrasive panel surfaces SI16SHM(L) / SI25SHM(L) / SI32SHM(L) / SI38SHM(L) 2 Escutcheon Plate 48 Lever Handle Mounting Hole 2H, 4 Lockable Lever 8 www.imopc.com + sales@imopc.
Dimensions (mm) continued SI16SHM(L) / SI25SHM(L) / SI32SHM(L) / SI38SHM(L) 6, 3H, 8, 4H SI16BMDC / SI25BMDC / SI32BMDC / SI38BMDC 2H, 4 delivered with: 2H, 4 Xmax. = 194, L = 150 (Xmin. = 89) delivered with: 2 Xmax. = 182, L = 150 (Xmin. = 77) Greater X-Dimensions on request L = X - 44±3 for 4, 2H L = X - 32±3 for 2 SI16BMDC / SI25BMDC / SI32BMDC / SI38BMDC 6, 3H, 8, 4H delivered with: 6, 3H, 8, 4H Xmax. = 194, L = 150 (Xmin.
Dimensions (mm) continued SI16DB(L) / SI25DB(L) / SI32DB(L) / SI38DB(L) 2 2H, 4 SI40DB(L) / SI55DB(L) 6, 3H, 8, 4H SI40DB(L) / SI55DB(L) 2, 2H, 4 SI16DB(L) / SI25DB(L) / SI32DB(L) / SI38DB(L) 6, 3H, 8, 4H SI.. DBL with low height handle 2-LH SI16DBL / SI25DBL / SI32DBL / SI38DBL with low height handle 2H-LH, 4-LH 6-LH, 3H-LH, 8-LH, 4H-LH 8 www.imopc.com + sales@imopc.
Dimensions (mm) continued SI16PEL / SI25PEL / SI32PEL / SI38PEL 2, 2H, 4 SI16PEL / SI25PEL / SI32PEL / SI38PEL 6, 8, 3H, 4H 26 8 www.imopc.com SI16PEL / SI25PEL / SI32PEL / SI38PEL 2, 2H, 4 + M25 SI40PEL / SI55PEL 2, 2H, 4 + sales@imopc.
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IMO Worldwide Offices IMO Precision Controls Limited The Interchange Frobisher Way Hatfield, Herts AL10 9TG United Kingdom IMO Jeambrun Automation SAS 5, Rue Alfred De Musset 94100 Saint-Maur-Des-Fosses France Tel: Fax: Email: Web: Tel: Fax: Email: Web: 01707 414 444 01707 414 445 imo@imopc.com www.imopc.com 0800 912 712 (no gratuit) 0145 134 737 imo-fr@imopc.com www.imojeambrun.
