Powerware (4080 KVA) 9390 User Manual Page 60
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Understanding UPS Operation
7-6
Powerware
®
9390 UPS (40–80 kVA) Installation and Operation Manual S 164201535 Rev C
7.2.3 Bypass Mode – RT
The UPS automatically switches to Bypass mode if it detects an overload, load fault, or
internalfailure.ThebypasssourcesuppliesthecommercialACpowertotheloaddirectly.
Figure 7-3 shows the path of electrical power through the UPS system when operating in
Bypass mode.
CAUTION
The critical load is not protected while the UPS is in Bypass mode.
Static
Switch
K5
Rectifier Inverter
K1 K3
Battery
Converter
Battery
Battery
Breaker
Main Power Flow
Trickle Current
Energized
De-Energized
Closed
Open
Breakers Contactors
Figure 7-3. Path of Current Through the UPS in Bypass Mode – RT
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 c onditioning 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.
- (40–80 kVA) 1
- IMPORTANT SAFETY INSTRUCTIONS 2
- SAVE THESE INSTRUCTIONS 2
- Consignes de sécurité 2
- ClassAEMCStatements 2
- Table of Contents 3
- Section II – Operation 4
- List of Figures 8
- Powerware 10
- Chapter 1 Introduction 11
- 1.2 Using This Manual 13
- 1.4 Safety Warnings 15
- 1.5 For More Information 16
- 1.6 Getting Help 16
- Section I Installation 17
- 2.2 Preparing the Site 19
- 3.2 UPS Cabinet Installation 23
- Installing the UPS System 24
- Front View 25
- Rear View 26
- 3.2.5.3 X-Slot Connections 33
- Installation Checklist 35
- Chapter 4 Batteries 39
- 4.2 Installing Batteries 40
- EMERGENCY OFF 41
- UNINTERRUPTIBLE POWER SYSTEM 41
- Plug-In Terminal 45
- Block J3 45
- Section II Operation 53
- UPS Cabinet 55
- 7.2.1 Single Module RT Modes 56
- 7.2.2 Normal Mode – RT 58
- Understanding UPS Operation 59
- 7.2.3 Bypass Mode – RT 60
- 7.2.4 Battery Mode – RT 62
- 7.3.2 Normal Mode – Parallel 65
- 7.3.3 Bypass Mode – Parallel 66
- 7.3.4 Battery Mode – Parallel 68
- 7.4.1 Input Rectifier 69
- 7.4.2 Inverter 69
- 7.4.4 Bypass 70
- 7.4.5 Batteries 70
- 8.1 UPS Standard Features 71
- 8.1.7 Installation Features 72
- 8.2.3 HotSync Parallel System 73
- 8.2.4 Optional X-Slot Cards 73
- 8.2.5 Remote Monitor Panel 73
- 8.2.6 Relay Interface Module 73
- PRESS ANY KEY TO CONTINUE 75
- 9.2.1 Mimic Screen 77
- 9.2.2 Event Screens 78
- 9.2.3 Unit Meter Screens 80
- 9.2.4 System Meters Screens 83
- Meters screen 85
- CONTRAST ADJUST 89
- ENTER PASSWORD 91
- CHANGE PASSWORD 93
- MM/DD/YYYY 95
- DD/MM/YYYY 95
- TIME FORMAT SETUP 95
- 2702 2004 15 42 YES 96
- SET DATE AND TIME MM/DD/YYYY 96
- 27 02 2004 15 42 YES 97
- SET DATE AND TIME DD/MM/YYYY 97
- COM PORT SETUP 98
- System Controls Screen 100
- Instructions.” 101
- Load Off Screen 102
- Reading the Status Indicators 103
- Using the Control Panel 104
- 10.1SingleModuleOperation 105
- UPS Operating Instructions 106
- . The input and output 108
- 10.1.8 Charger Control 109
- 10.2.5 Single UPM Shutdown 115
- Using Features and Options 120
- 11.4 Relay Interface Module 122
- ON GENERATOR 123
- 12.1 General 125
- 12.2 System Event Horns 125
- 12.3 System Event Indicators 125
- 12.4 System Event Messages 125
- Horn Phone Relay Log* 126
- Indication 126
- Log*RelayPhoneHorn 127
- Responding to System Events 134
- Chapter 13 Communication 135
- 13.3 Remote Notification 136
- 13.4 Terminal Mode 137
- 13.4.2 Event History Log 138
- Communication 139
- 14.2.1 DAILY Maintenance 142
- 14.2.2 MONTHLY Maintenance 143
- 14.2.3 ANNUAL Maintenance 143
- 14.2.4 BATTERY Maintenance 143
- Maintaining the UPS System 144
- 15.2.1 UPS System Input 145
- Reduced for Generator 145
- 15.2.2 UPS System Output 146
- ¦1% (10% to 100% load) 146
- 15.2.3 Environmental 146
- Product Specifications 147
- Appendix A 149
- Installation Information 149
- DESCRIPTION: 150
- DRAWING NO: SHEET: 150
- REVISION: 150
- 208V INPUT AND 208V OUTPUT 154
- 480V INPUT AND 480V OUTPUT 154
- SINGLE OR DUAL FEED 154
- TYPICALPARALLELSYSTEM 156
- (1+1 AND 2+0 CONFIGURATIONS) 156
- (2+1 AND 3+0 CONFIGURATIONS) 157
- (3+1 AND 4+0 CONFIGURATIONS) 158
- TOP VIEW 175
- BOTTOM VIEW 175
- LEFT SIDE VIEW 176
- RIGHT SIDE VIEW 176
- TERMINAL DETAIL 178
- INTERFACE TERMINAL LOCATIONS 182
- INTERFACE TERMINALS 183
- Hot Sync CAN Bridge Card 187
- PARALLEL SYSTEM CAN WIRING 188
- PARALLEL SYSTEM BACK UP 189
- CONTROL (PULL CHAIN) 189
- ALTERNATE PARALLEL SYSTEM 190
- BACK UP CONTROL 190
- (PULL CHAIN) WIRING 190
- SUPERVISORY CONTACT MODULE 191
- TERMINAL LOCATIONS 191
- OPTIONAL REMOTE MONITOR PANEL 198
- 164201535---11 198
- 164201535---12 199
- 164201535---12 2 of 2 200
- Warranty 203
- *164201535C* 206
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