Riello UPS MASTER HE - Page 8

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4. MASTER HE IN PARALLEL CONFIGURATION................................................ 36
4.1 Introduction .................................................................................................................. 36
4.2 Electrical system set-up ................................................................................................ 37
4.2.1 Input ................................................................................................................................................. 37
4.2.2 Differential....................................................................................................................................... 37
4.2.3 Emergency power off device (EPO) ................................................................................................. 37
4.2.4 External maintenance bypass. ...................................................................................................... 38
4.3 Mains, load and battery connections. .......................................................................... 39
4.3.1 UPS AC input / output power connection ........................................................................................ 39
4.3.2 Power connections battery side. ...................................................................................................... 40
4.4 Connection of signals ................................................................................................... 42
4.5 Start-up procedure ....................................................................................................... 44
4.6 Operating modes .......................................................................................................... 45
4.7 bypass for maintenance ................................................................................................ 47
5. MAINTENANCE ................................................................................................ 51
6. GENERAL CHARACTERISTICS ........................................................................... 53
7. APPENDIX A - REMOTE COMMANDS AND ALARMS CARD - ................................ 56