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Eaton Electrical Powerware 9395 4.2.3 Battery mode, Figure 4-4.Path of current through the UPS in battery mode

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In bypass mode, the output of the system is provided with three-phase AC power directly from the system input. While in this mode, the output of the system is not protected from voltage or frequency fluctuations or power outages from the source. Some power line filtering and spike protection is provided to the load but no active power conditioning or battery support is available to the output of the system in the bypass mode of operation.

The internal bypass is comprised of a solid-state, silicon-controlled rectifier (SCR) static switch (SSW) and a backfeed protection contactor K5.The static switch is rated as a continuous-duty device that is used anytime the inverter is unable to support the applied load.The static switch is wired in series with the backfeed protection contactor, and together they are wired in parallel with the rectifier and inverter.The static switch, being an electronically-controlled device, can be turned on immediately to pick up the load from the inverter while the inverter output contactor K3 opens to isolates the inverter.The backfeed protection contactor is normally always closed, ready to support the static switch unless the bypass input source becomes unavailable.

4.2.3 Battery mode

The UPS automatically transfers to battery mode if a utility power outage occurs, or if the utility power does not conform to specified parameters. In battery mode, the battery provides emergency DC power that the inverter converts to AC power.

Figure 4-4 shows the path of electrical power through the UPS system when operating in battery mode.

Figure 4-4. Path of current through the UPS in battery mode

44	UPS 450 - 550 kVA (2x225 - 2x275 kVA)	1027574
	User’s and Installation Guide	Revision B

Contents

Powerware 9395 UPS 450–550kVA (2x225 - 2x275 kVA) User’s and Installation Guide IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS Powerware 9395 UPS 450–550kVA (2x225 - 2x275 kVA) User’s and Installation Guide Page 1 Introduction 1.1 UPS standard features Figure 1-1.Powerware 9395-550(2*275) cabinet 1.2 Options and accessories 1.3 Basic system configurations 1.4 Using this manual 1.5 Conventions used in this manual 1.6 Symbols, controls, and indicators 1.7 For more information 1.8 Getting help 2 UPS installation plan and unpacking 2.1 Creating an installation plan 2.2 Preparing the site Model Weight kg Table 2-1.UPS cabinet weights From top of cabinet From front of cabinet Figure 2-1.UPS cabinet dimensions (front view) Figure 2-2.UPS cabinet dimensions (right side view) Figure 2-3.UPS cabinet dimensions (top view) Figure 2-4.UPS cabinet dimensions (bottom view) 2.2.2 UPS system power wiring preparation Rating Units Rating 50/60 Hz Input and output voltage AC input to UPS rectifier Terminal function Terminal Function Bus landing Bolt size Load rating Table 2-8.Recommended bypass and output circuit breaker ratings 2.2.3 UPS system interface wiring preparation Page 2.3 Inspecting and unpacking the UPS cabinet Figure 2-8.Powerware 9395 UPS (2*275 kVA) cabinet as shipped on pallet 3 UPS system installation 3.1 Preliminary installation information 3.2Unloading the UPS cabinet from the pallet and mechan- ical installation •Do not tilt cabinets more than 10° from vertical •Lift the cabinet only with a forklift or damage may occur Figure 3-1.Removing left side shipping bracket 3.3 Battery cabinet installation 3.4 Installing UPS external and battery power wiring Figure 3-3.Conduit and wire entry locations Figure 3-4a UPS power terminal locations Figure 3-4.b UPS power terminal locations Figure 3-5a, front view Figure 3-5b, side view. UPS power terminal locations MBS version 3.5 Installing interface connections Figure 3-6.Typical alarm relay connection Figure 3-7.Interface terminal locations Terminal TB1 Name Descrition Terminal TB2 Terminal TB3 Figure 3-8.Interface terminal detail AA Figure 3-9.Terminal blocks TB1, TB2, and TB3 connector assignments 3.5.2 TB1 battery interface connections Figure 3-10.Typical battery interface connection 3.5.3 X-Slotconnections 3.6 Installing a remote EPO switch Figure 3-12.Remote EPO switch From remote EPO switch To customer interface Remarks Terminal board TB1 in UPS cabinet Figure 3-13. Normally-Openremote EPO switch wiring Figure 3-14.Normally closed remote EPO switch wiring 3.7 Initial startup 3.8 Completing the installation checklist Installation checklist 4 Understanding UPS operation 4.1 Looking inside the UPS system 4.2 Modes 4.2.2 Bypass mode The critical load is not protected while the UPS is in Bypass mode Figure 4-3.Path of current through the UPS in bypass mode 4.2.3 Battery mode Figure 4-4.Path of current through the UPS in battery mode 4.3 UPS system one line configurations Page Figure 4-6.Typical maintenance bypass panel 5 UPS operating instructions 5.1 UPS controls and indicators 5.2 Using the control panel 5.2.2 Using the LCD and pushbuttons Figure 5-3.Parts of the LCD 5.2.3 Using the menu Menu option Table 5-2.Display function menu map 5.2.4 Mimic screen Figure 5-4.Main menu and Mimic screen (normal mode) Page Page Page Page Table 5-3.Display menu operation 5.2.6 System controls screen Figure 5-5.System Controls screen 5.3 Operation 5.3.2 Starting the UPS in bypass mode 5.3.3 Starting the power module 5.3.4 Transfer from normal to bypass mode Power is present inside the UPS cabinets 5.3.5 Transfer from bypass to normal mode 5.3.6 Transfer from normal to bypass mode and shut down UPS 5.3.7 UPS and critical load shutdown 5.3.8 Charger control 5.3.9 Using the UPS LOAD OFF pushbutton 5.3.10 Using the Remote Emergency Power-offswitch Turn UPS from normal mode to mechanical bypass Turn UPS from mechanical bypass to normal mode 6 Responding to system events 6.1 General 6.2 System event horns 6.3 System event indicators 6.4 System event messages 7 Communication 7.1 X-Slotcards 7.2 Powerware LanSafe Power Management Software 7.3 Terminal mode MM DD YYYY HH:MM:SS.hh KYWD MESSAGE <CR> <LF Figure 7-3.Sample Event History Log 7.4 Building alarm monitoring 7.5 General purpose relay contact 8 UPS maintenance 8.1 Important safety instructions 8.2 Performing preventive maintenance 8.3 Installing batteries 9 Recycling the used UPS or batteries 10 Product specifications 10.1 Model numbers 10.2 Single module specifications 11 Warranty