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9 commissioning – SMA SC 500HE-US Installation User Manual

Page 9

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SMA America, LLC

Table of Contents

Installation Manual

SC500HEUS-IA-US_en-14

9

8.2.4 Optional External 3-phase voltage supply

(3AC, 208/120V, 60Hz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

8.2.5 Connecting the external 208 V power supply. . . . . . . . . . . . . . . . . 50
8.2.6 Connecting Analog input setting cables. . . . . . . . . . . . . . . . . . . . . . 53
8.2.7 Connecting Cables for the Low Temperature Option. . . . . . . . . . . . 54

8.3 Connection Area for AC, DC cables and ground . . . . . . . . . . . . . . . 55
8.4 Connection Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

8.4.1 DC Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
8.4.2 Grounding the PV modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
8.4.3 Cable connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
8.4.4 Cable requirements for DC, AC and PE connection . . . . . . . . . . . . 58
8.4.5 Additional cable requirements for DC connection . . . . . . . . . . . . . . 58

8.5 Connecting DC cables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

8.5.1 Connecting DC cables with screw terminals . . . . . . . . . . . . . . . . . . 59
8.5.2 Connecting DC cables with cable lugs . . . . . . . . . . . . . . . . . . . . . . 60

8.6 Connection of the PV Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

8.6.1 PV Modules: DC − Connection at Negative Grounding and DC+

Connection at Positive Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . 62

8.6.2 PV Modules: DC+ Connection at Negative Grounding and DC −

Connection at Positive Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . 63

8.7 AC Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

8.7.1 Additional cable requirements for AC connection . . . . . . . . . . . . . . 65
8.7.2 Arranging AC cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
8.7.3 Connecting AC cables to busbars . . . . . . . . . . . . . . . . . . . . . . . . . . 67
8.7.4 AC Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

8.8 Connecting protective earth. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71

8.8.1 Additional cable requirements for PE connection. . . . . . . . . . . . . . . 71
8.8.2 Connecting protective earth to Terminal Blocks . . . . . . . . . . . . . . . . 71
8.8.3 Connecting protective earth to busbar. . . . . . . . . . . . . . . . . . . . . . . 72

9 Commissioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

9.1 Visual Inspection of the Sunny Central . . . . . . . . . . . . . . . . . . . . . . . 73
9.2 Switching the Sunny Central On . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

9.2.1 Check the Ventilation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

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