Table of Contents
Advertisement
Quick Links
Advertisement
Table of Contents
Troubleshooting
Related Manuals for Emerson Liebert GXT4-5000RT208
Summary of Contents for Emerson Liebert GXT4-5000RT208
- Page 1 Liebert GXT4 UPS 208 V, 5000 VA – 10,000 VA, 6000RTL630 ® ™ User Manual...
-
Page 3: Table Of Contents
Table of Content Important Safety Instructions........1 Glossary of Symbols. - Page 4 2.4 Install the Main Cabinet........... 18 2.4.1 Tower UPS Installation .
- Page 5 5.0 Communication ..........47 5.1 Liebert IntelliSlot Communication Cards .
- Page 6 List of Figures Figure 1-1: Liebert GXT4 5000VA and 6000VA, front view ......... . . 6 Figure 1-2: Rear panel—5000VA and 6000VA with input power hard-wired box .
- Page 7 Figure 5-1: Terminal-block communication pin layout ..........49 Figure 5-2: REPO switch connection diagram .
- Page 8 List of Tables Table 1-1: UPS models, power ratings............5 Table 2-1: Branch circuit breaker ratings .
-
Page 9: Important Safety Instructions
• Use tools with insulated handles. • Do not lay tools or other metal objects on the batteries. • If the battery kit is damaged in any way or shows signs of leakage, contact your local Emerson representative immediately. • Do not dispose of batteries in a fire. The batteries may explode. - Page 10 Operate the UPS in an indoor environment only in an ambient temperature range of 0-40°C (32-104°F). Install it in a clean environment, free from moisture, flammable liquids, gases and corrosive substances. The Liebert GXT4-5000RT208, Liebert GXT4-6000RT208 and the Liebert GXT4-6000RTL630 contain no user-serviceable parts except the internal battery pack. The Liebert GXT4-10000RT208 and the Liebert GXT4-8000RT208 contain no user-serviceable parts except the internal battery pack and the Power Module.
-
Page 11: Glossary Of Symbols
Glossary of Symbols Glossary of Symbols Risk of electrical shock Indicates caution followed by important instructions AC input AC output Requests the user to consult the manual Indicates the unit contains a valve-regulated lead acid battery PbH2SO4 Recycle DC voltage Equipment grounding conductor Bonded to ground AC voltage... - Page 12 Glossary of Symbols Page intentionally left blank. ® ™ Liebert GXT4 User Manual...
-
Page 13: Product Description
Product Description 1.0 Product Description The Liebert GXT4 is a compact, online uninterruptible power system (UPS) that continuously conditions and regulates its output voltage. The UPS is designed to supply microcomputers and other sensitive electronic equipment with clean sine wave input power. Upon generation, AC power is clean and stable. -
Page 14: Appearance And Components
Product Description 1.3 Appearance and Components 1.3.1 Appearance The Liebert GXT4 rack/tower models in various power ratings have the same general appearance, controls and features (see Figure 1-1). The various rack/tower models differ largely in the type of receptacles each has. Figure 1-1 Liebert GXT4 5000VA and 6000VA, front view Upper Bezel Operation and Display Panel... -
Page 15: Figure 1-2 Rear Panel-5000Va And 6000Va With Input Power Hard-Wired Box
Product Description Figure 1-2 Rear panel—5000VA and 6000VA with input power hard-wired box Knockouts for Liebert IntelliSlot Hard-Wired Unity-DP Card Power Input and Output USB Port REPO Terminal Block Communication External Battery Connector Input Breaker NOTE Hard-wired and hard-wired/receptacle boxes that include a manual bypass switch permit AC power to continue to flow from the utility input to the load while the box is removed from the UPS. -
Page 16: Figure 1-4 Rear Panel-8000Va
Product Description Figure 1-4 Rear panel—8000VA Terminal Block Liebert IntelliSlot REPO Connection Block Communication Unity-DP Card Maintenance Bypass Switch USB Port Output Breaker Input Switch Breaker Switch Cover for Power Distribution Box Connections Knockouts External Battery for Hard-Wired Connectors Power Input ®... -
Page 17: Removable Power Distribution Box
Product Description 1.4 Removable Power Distribution Box The UPS is shipped with a power-distribution pack installed. This box contains the UPS input circuit breaker. Figure 1-5 Power distribution models for 5000 VA and 6000 VA models PD2-001 shown as example; similar features on other distribution boxes arranged differently L14-30 Input... -
Page 18: Figure 1-6 Power Distribution Models For 8000 Va And 10,000 Va Models
Product Description Figure 1-6 Power distribution models for 8000 VA and 10,000 VA models PD2-101 shown as example; similar features on other 5-20R Output distribution boxes arranged differently Receptacles Output Circuit Breaker Switch for L6-30R Pigtail #1 L6-30ROutput Receptacles Push Button Circuit Breakers for 5-20R Receptacles... -
Page 19: Figure 1-7 Power Distribution Models For 8000 Va And 10,000 Va Models (Continued)
Product Description Figure 1-7 Power distribution models for 8000 VA and 10,000 VA models (continued) PD2-201 PD2-107 Receptacles: four L5-20R; Receptacles: four 5-15R two IEC320-C19 eight IEC320-C13 PD2-108 Receptacles: two L6-30R; two L6-20R PD2-202 Receptacles: (12) IEC320-C13 PD2-109 Receptacles: two L14-30R PD2-204 Receptacles: two IEC309-32A... -
Page 20: Internal Battery Packs
Product Description 1.5 Internal Battery Packs The UPS has two internal battery packs behind a battery access door on the front of the unit. Each internal battery pack is fitted with a connector to link to the UPS. NOTE GXT4 10,000-VA battery pack shown in Figure 1-8. 5000-VA and 6000-VA battery packs have the same features. -
Page 21: Rectifier/Power Factor Correction (Pfc) Circuit
Product Description 1.6.2 Rectifier/Power Factor Correction (PFC) Circuit In normal operation, the rectifier/power factor correction (PFC) circuit converts mains AC power to regulated DC power for use by the inverter while ensuring that the waveshape of the input current used by the UPS is near ideal. -
Page 22: Operating Mode
Product Description 1.7 Operating Mode The UPS operation modes include the following: Mains (AC) Mode, Bypass Mode, Battery Mode, Battery Recharge Mode, Active ECO Mode and Frequency Converter Mode. Refer to 3.0 - Operation and Display Panel for details about the operating mode indicators and control buttons. -
Page 23: Frequency Converter Mode
Product Description 1.7.5 Frequency Converter Mode All models of the Liebert GXT4 are capable of frequency conversion. Frequency Conversion Mode can be selected using the configuration program. Allowable frequency operating modes include: • Auto Sensing - 50Hz or 60Hz – Bypass Enabled •... - Page 24 Product Description Page intentionally left blank. ® ™ Liebert GXT4 User Manual...
-
Page 25: Installation
® representative immediately. • Check the accessories against the delivery list. If there is any discrepancy, contact your local dealer or your Emerson representative immediately CAUTION The UPS is heavy (see 8.0 - Specifications). Take proper precautions when lifting or moving it. -
Page 26: Preparation For Installation
Installation 2.3 Preparation for Installation 2.3.1 Installation Environment Install the Liebert GXT4 indoors in a controlled environment, where it cannot be accidentally turned Off. Place it where air flows unrestricted around the unit. The installation location must be free of water, flammable liquids, gases, corrosives and conductive contaminants. -
Page 27: Rack Installation
Installation 4. Adjust the direction of the operation and display panel and logo on the Liebert GXT4. a. Remove the front plastic bezel cover as shown in Figure 2-2. Figure 2-2 Remove the front plastic bezel cover Front plastic bezel cover b. -
Page 28: External Battery Cabinet Installation
2. Optional rack-mount hardware is shipped with the external battery cabinet and may be installed at this time if desired. • Securing hardware and slide rails are sold separately. Please contact your local dealer or Emerson representative for these additional options and any assistance needed. Fasten the slides into position with the screws per the instructions included with the slide rails. -
Page 29: Connect Input/Output Power
Installation 7. Verify the circuit breaker on the External Battery Cabinet is in the On position. 8. Use the included configuration program or the LCD to program the UPS with the number of external battery cabinets connected. Instructions for the configuration program are in 5.2.1 - Configuration Program. -
Page 30: Remove The Power Distribution Box From 5000Va And 6000Va Models
Installation 2.6.2 Remove the Power Distribution Box from 5000VA and 6000VA Models 1. Manually transfer the connected equipment to the internal bypass. a. From the main menu select CONTROL, then press Enter. b. Select TURN ON & OFF and press Enter. c. -
Page 31: Remove The Power Distribution Cover From 8000Va And 10,000Va Models
Installation 2.6.3 Remove the Power Distribution Cover from 8000VA and 10,000VA Models WARNING Risk of electric shock. Can cause injury or death. The UPS must be shut down or the load must be transferred to an external maintenance bypass before a power distribution box may be added, changed or removed. If the UPS will be shut down, the connected load must be shut down (refer to 4.5 - Shut Down the GXT4). -
Page 32: Install The Power Distribution Box On 8000Va And 10,000Va Models
Installation 2.6.4 Install the Power Distribution Box on 8000VA and 10,000VA Models WARNING Risk of electric shock. Can cause injury or death. The UPS must be shut down or the load must be transferred to an external maintenance bypass before a power distribution box may be added, changed or removed. If the UPS will be shut down, the connected load must be shut down (refer to 4.5 - Shut Down the GXT4). -
Page 33: Terminal Block Connections
2.6.5.1 Terminal Block Connections Conduit entry holes are provided on the rear and side of the box. Input and output wiring should not share the same conduit. Emerson recommends using strain relief when installing the wire. Table 2-2 Electrical specifications... -
Page 34: Figure 2-8 Terminal Block Connections
INPUT NOTE 1. Emerson recommends installing a UL489-approved breaker upstream of unit. 2. The installer must provide circuit breaker protection according to local codes. The mains disconnect should be within sight of the UPS or have appropriate an appropriate lock-out. -
Page 35: Power System Configuration
Installation 2.7 IT Power System Configuration 1. Remove screws on the IT Power System Access Cover as shown in Figure 3. 2. Disconnect the connectors as shown in figure. 3. Install IT Power System Access Cover and screws. Figure 3 Remove cover from IT Power System Connectors compartment IT Power System Remove Screws... - Page 36 Installation Page intentionally left blank. ® ™ Liebert GXT4 User Manual...
-
Page 37: Operation And Display Panel
Operation and Display Panel 3.0 Operation and Display Panel This chapter describes the Liebert GXT4 controls, particularly the operation and display panel on the front of the Liebert GXT4. The panel has four control buttons, seven LED indicators and a liquid crystal display (LCD), as shown in Figure 3-1. -
Page 38: Control Buttons
Operation and Display Panel 3.2 Control Buttons The four control buttons on the front of the operation and display panel are: • ESC • Up • Down • Enter Figure 3-1 shows the buttons’ locations; their descriptions and functions are shown in Table 3-2. Table 3-2 Control buttons Control Buttons... -
Page 39: Menu Structure
Operation and Display Panel 3.4 Menu Structure The menu structure of the LCD is shown in Figure 3-2. Figure 3-2 Menu structure Audible Alarm Output Startup on Bypass Load Enable Guaranteed Status Shutdown Input Enable Auto Restart Battery Start Windows Frequency Selection Time Since Startup Output Level Selection... -
Page 40: Startup Screen
When the Liebert GXT4 is starting up, it initiates a self-test and displays the screen shown in Figure 3-3 for about 10 seconds. Figure 3-3 Startup screen EMERSON Network Power After about 10 seconds, the LCD shows one of the On screens in Figure 3-4; the screen shown depends on whether input power is available. -
Page 41: Default Screen
Operation and Display Panel 3.4.2 Default Screen Press any button in the START SUCCESSFUL screen to enter the default interface, shown in Figure 3-6. NOTE Values shown in the default screen will vary depending on installation and configuration. In the default screen, the LCD shows the UPS model, output parameters, input parameters, battery capacity with run time estimate and load percentage. -
Page 42: Figure 3-8: Status Screens
Operation and Display Panel STATUS Screen In the MAIN MENU screen, select STATUS to enter the Status Screen, displaying OUTPUT, LOAD, INPUT, BATTERY and TIME SINCE STARTUP, as shown in Figure 3-8. Figure 3-8 Status screens OUTPUT LOAD INPUT VOLT 120V VOLTAGE 120V... -
Page 43: Figure 3-10: Ups Screens
Operation and Display Panel UPS Screen Select MAIN MENU > CONFIGURATION > UPS to enter the UPS screen. This menu has six screens, as shown in Figure 3-10. Press the Up or Down button to move the cursor to the required item, and press the Enter button to confirm the settings. -
Page 44: Figure 3-12 Eco Mode Screen
Operation and Display Panel ECO Mode Screens Select MAIN MENU > CONFIGURATION > ECO MODE to enter the ECO MODE screens, as shown in Figure 3-12. Press the Up or Down button to move the cursor to the required item, and press the Enter button to confirm the settings. -
Page 45: Figure 3-14 Language Screen
Configuration Program user manual on the included CD. Figure 3-14 Language screen 1 English Select ‘2 COLOR’ and press the Enter button to enter the COLOR screen, as shown in Figure 3-15. Figure 3-15 Color screen EMERSON EMERSON EMERSON EMERSON FACTORY DEFAULT screen Select MAIN MENU ->... -
Page 46: Figure 3-17 Control Screen
Operation and Display Panel Control Screen Select MAIN MENU -> 3 CONTROL to enter the CONTROL screen. This screen has three submenus, TURN ON & OFF, ALARM CONTROL and BATT TEST, as shown in Figure 3-17. In the CONTROL screen, press the Up or Down button to move the cursor to the required item, and press the Enter button to enter its submenu. -
Page 47: Figure 3-19 Alarm Control Screen
Operation and Display Panel ALARM CONTROL screen Select MAIN MENU -> 3 CONTROL -> 2 ALARM CONTROL to enter the ALARM CONTROL screen, as shown in Figure 3-19. This section allows active audible alarms to be silenced. To completely turn off the audible alarm, refer to CONFIGURATION >... -
Page 48: Figure 3-22 Clear Log Screen
Operation and Display Panel CLEAR LOG Screen Select MAIN MENU > LOG > CLEAR LOG to enter the CLEAR LOG screen, as shown in Figure 3-22. Press the Up or Down button to move the cursor to the required item. Press the Enter button to confirm the settings. -
Page 49: Figure 3-24: Network Screens
Operation and Display Panel Network Select MAIN MENU>NETWORK to enter the NETWORK screen. The NETWORK screen displays the MAC address and the IPv4 IP address. If the Liebert GXT4 is fitted ® with an optional Liebert IntelliSlot Web card (Liebert IS-WEBCARD), the screen will display IPv6 IP address settings (IPv6 requires configuration), as shown in Figure 3-24. -
Page 50: Prompt List
Operation and Display Panel 3.4.4 Prompt List A prompt screen is displayed during the operation of the system to alert you to certain conditions and/or to require your confirmation of a command or other operation. See Table 3-3 for the prompts and meanings. Table 3-3 System prompts and meanings Prompt... -
Page 51: Fault List
Operation and Display Panel 3.4.6 Fault List All UPS fault messages are described in Table 3-5. Table 3-5 Fault list Fault Description UPS Self-Test Failed The battery is bad or weak or not connected. UPS Overload The UPS is overloaded. Inverter Out Of Order The inverter has failed. - Page 52 Operation and Display Panel Page intentionally left blank. ® ™ Liebert GXT4 User Manual...
-
Page 53: Operation
• If the battery test results show FAILED, allow the UPS to recharge the batteries for 24 hours. • Retest the batteries after 24 hours of charging. • After the batteries have been retested, if the battery test still shows FAILED, contact your local ® Emerson representative or Emerson Network Power Channel Support. ® ™ Liebert GXT4... -
Page 54: Manual Bypass
Operation 4.4 Manual Bypass To manually transfer the connected equipment to the internal bypass: 1. From the main menu select Control then press enter. 2. Select TURN ON & OFF and press Enter. 3. Select TURN UPS BYPASS and press Enter. The UPS will transfer the connected loads to the internal bypass. -
Page 55: Communication
UPS. For more information about the Liebert IntelliSlot SNMP Card, Liebert IntelliSlot Web Card and Liebert ® MultiLink License Kits, visit the Liebert Web site (www.liebert.com) or contact your local Emerson representative. ®... -
Page 56: Usb Port Communication
• Select the number of external battery cabinets connected to the UPS to adjust the remaining run time ® calculated by Emerson software products (default is zero) • Select one of multiple output voltages to match various voltages (see Table 5-1). -
Page 57: Terminal Block Communication
Communication NOTE Programming the output voltage of the Liebert GXT4-5000RT208, GXT4-6000RT208, GXT4- 8000RT208, and GXT4-10000RT208 models to 220/110VAC automatically derates both the VA and Watt ratings to 90% of the units ratings and programming the output voltage to 200/100VAC automatically derates both the VA and Watt ratings to 80% of the units ratings (refer to 9.0 -... -
Page 58: Any Mode Shutdown
Communication 5.3.1 Any Mode Shutdown The purpose of Any Mode Shutdown is to shut down the UPS output by turning Off the rectifier, inverter and static switch so that there is no power to the loads. Any Mode Shutdown can be operated locally or remotely: •... -
Page 59: On Battery
Communication 5.3.3 On Battery On Battery signal is a Normally Open (NO) dry contact. When the UPS is supplying output power from the battery this dry contact will be closed. 5.3.4 Low Battery Low Battery signal is a Normally Open (NO) dry contact. When the UPS is supplying output power from the battery and has reached the Low Battery Warning time selected in the configuration program, this dry contact will be closed. - Page 60 Communication Remote Emergency Power Off—GXT4-5000RT208, GXT4-6000RT208, GXT4-8000RT208, GXT4-10000RT208 +24 V supplied by GXT4 UPS How UPS ships, with jumper removed and in the accessory bag. +24 V supplied by GXT4 UPS How UPS must be wired to operate with no repo connection. Jumper in accessory bag must be installed.
-
Page 61: Maintenance
• Use tools with insulated handles. • Do not lay tools or other metal objects on the batteries. • If the battery kit is damaged in any way or shows signs of leakage, contact your local Emerson representative immediately. • Do not dispose of batteries in a fire. The batteries may explode. -
Page 62: Battery Replacement Procedures
Read all safety cautions before proceeding. A trained user can replace the internal battery pack when the UPS is always in a restricted access location (such as a rack or server closet). Contact your local dealer or Emerson representative to obtain the pricing of the appropriate replacement battery pack. CAUTION Risk of explosion if battery is replaced by an incorrect type. -
Page 63: Battery Charging
The Liebert GXT4 charges the batteries continuously when it is connected to the utility input power. If the Liebert GXT4 will be stored for a long time, Emerson recommends connecting the UPS to input power for at least 24 hours every four to six months to ensure full recharge of the batteries. -
Page 64: Precautions
Support. • Check if the battery is discharging: When the utility input is normal, the battery should not discharge. If the UPS is operating in Battery Mode, stop and contact your local Emerson representative or Emerson Channel Support. 6.5 Checking UPS Functions NOTE UPS function check procedures may interrupt power supply to the connected load. -
Page 65: Replacing The Power Module On 8000 And 10,000Va Models
Maintenance 6.6 Replacing the Power Module on 8000 and 10,000VA models CAUTION The UPS must be switched to manual bypass before personnel begin to replace the power module. NOTICE During the procedure, the connected load will not be protected from power disturbances, such as spikes, sags and failure. - Page 66 Maintenance 14. Reconnect the external battery cables, if used. 15. Reattach both front cover grilles. 16. Reattach the front plastic bezels. 17. Close the input circuit breaker on the rear of the UPS (see Figure 1-6). 18. Close the output circuit breaker on the rear of the UPS (see Figure 1-6). 19.
-
Page 67: Troubleshooting
Troubleshooting 7.0 Troubleshooting This section indicates various UPS symptoms a user may encounter and provides a troubleshooting guide in the event the UPS develops a problem. Use the following information to determine whether external factors caused the problem and how to remedy the situation. 7.1 UPS Symptoms The following symptoms indicate the Liebert GXT4 is malfunctioning: •... -
Page 68: Audible Alarm
Check load level indicator and reduce the load on the UPS. backup time Batteries may not be able to Replace batteries. Contact your local dealer, Emerson representative or hold a full charge due to age Emerson Channel Support for replacement battery kit. - Page 69 Troubleshooting When reporting a UPS issue to Emerson, include the UPS model and serial number. These are located in several places for your ease of location: • on the top panel (rack mount orientation) • the left side (tower orientation) •...
- Page 70 Troubleshooting Page intentionally left blank. ® ™ Liebert GXT4 User Manual...
-
Page 71: Specifications
Specifications 8.0 Specifications Table 8-1 UPS specifications—5000, 6000, 8000 and 10,000 models GXT4- GXT4- GXT4- GXT4- Model Number 5000RT208 6000RT208 8000RT208 10000RT208 Model Rating 4000W/5000VA 4800W/6000VA 7200W/8000VA 9000W/10000VA Dimensions, Rack Mount, W x D x H 16.9 x 26.1 x 6.8 (430 x 662 x 173) 16.9 x 26.5 x 10.3 (430 x 672 x 261) Unit, in. -
Page 72: Table 8-2 Ups Specifications-Liebert Gxt4-6000Rtl630
Specifications Table 8-2 UPS specifications—Liebert GXT4-6000RTL630 Model Number GXT4-6000RTL630 Model Rating 4200W/6000VA Dimensions, Rack Mount, W X D X H, in. (mm) Unit 16.9 x 22.6 x 8.5 (430 x 574 x 217) Shipping 35 x 27 x 29 (889 x 686 x 737) Weight, lb (kg) Unit 132.2 (60) -
Page 73: Table 8-3 Internal Battery Cabinet Specifications
Specifications Table 8-3 Internal battery cabinet specifications Model Number GXT4-144VBATKIT GXT4-240VBATKIT GXT4-288VBATKIT Used with UPS Model GXT4-5000RT208 GXT4-8000RT208 GXT4-6000RT208 GXT4-6000RTL630 GXT4-10000RT208 Dimensions, Rack Mount, W x D x H, in (mm) Unit 8.1 x 19.3 x 2.8 7.2 x 15.4 x 4.4 8.1 x 19.7 x 5.3 (206 x 490 x 70) (184 x 390 x 113) -
Page 74: Table 8-4 External Battery Cabinet Specifications
Specifications Table 8-4 External battery cabinet specifications Model Number GXT4-144VBATT GXT4-240VBATT GXT4-288VBATT GXT4-5000 & GXT4-8000 & GXT4-6000RTL630 Used w/UPS Model GXT4-6000RT208 GXT4-10000RT208 Dimensions, W x D x H, in. (mm) Unit (with bezel) 16.9 x 26.1 x 3.3 16.9 x 22.6 x 6.8 16.9 x 26.5 x 6.8 (430 x 662 x 85) (430 x 574 x 173) -
Page 75: Table 8-6: Power Distribution Box Specifications For Gxt4-8000Rt208 And Gxt4-10000Rt208
Specifications Table 8-6 Power distribution box specifications for GXT4-8000RT208 and GXT4-10000RT208 Power Distribution Box Model # POD Model # PD2-101 PD2-102 PD2-103 PD2-104 PD2-105 PD2-106 Dimensions, W x D x H, in. (mm) Unit 7.4 x 5.7 (188 x 145) Shipping 11.9 x 20.6 x 8.7 (302 x 522 x 220) Weight, lb (kg) - Page 76 Specifications Table 8-8 Battery run time, minutes 208/120 VAC RT Models 208 VAC RT Model Number of External Load Percent Battery Cabinets of Capacity 5 kVA 6 kVA 8 kVA 10 kVA 6 kVA (L630) Internal Battery 100% Internal Battery + 1 External Battery Cabinet 100%...
-
Page 77: Table 8-8: Battery Run Time, Minutes
Specifications Table 8-8 Battery run time, minutes (continued) 208/120 VAC RT Models 208 VAC RT Model Number of External Load Percent Battery Cabinets of Capacity 5 kVA 6 kVA 8 kVA 10 kVA 6 kVA (L630) Internal Battery + 4 External Battery Cabinets 100% 1108... -
Page 78: Auto-Learning Battery Run Times
• To contact warranty support by e-mail: microups.warranty@emerson.com 8.3 Technical Support Technical support contacts are listed on the back cover of this document. To contact Emerson Channel Product Support: Phone • NORTH AMERICA: 1-800-222-5877 • OUTSIDE NORTH AMERICA: 00-800-1155-4499 E-mail •... - Page 80 © 2016 Liebert Corporation All rights reserved throughout the world. Specifications subject to changewithout notice. ® Liebert is a registered trademark of Liebert Corporation. All names referred to are trademarks or registered trademarks of their respective owners. SL-23194_REV2_6-16 590-1365-501A Emerson Network Power www.emersonnetworkpower.com...