STS2/PDU
Power Distribution
Contacting Liebert for Support
Table of Contents
Operating Instructions
Alarms and Faults
Introduction to STS2/PDU Operations
Theory of Operation
Specifications
Communication Interfaces
Touch Screen Display
Customer Settings
Event Message Help Text Maintenance
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Tables
Important Safety Instructions
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External Inspections
Unloading and Handling
Unpacking and Inspections
Handling Considerations
Shipping weights typical
Model Weight lbs. kg
Internal Inspections
Location Considerations
Recommended Minimum Service Clearances
Heat Output
Operating Environment
Altitude
Altitude conversion-feet to meters
Feet = Meters
Anchoring the Unit to the Floor
Leveling of the 250A Only STS2/PDU Without Anchoring
Locating the STS2/PDU
Power and Control Wiring
Input and Output Power Connections
Typical STS2/PDU, one-line diagram
Rating Maximum Number Conduits Size,
Input/output conduit plate specifications
Remote source selection terminal block
Control Wiring Connections
Remote Source Selection Wiring
System Grounding
Terminal block 1 and terminal block 2 wire connections
Power Supply
Output Breaker
Output Power Wiring
Distribution configurations
Customer Connections
Programmable relay board pinout Channel Pin No
Programmable Relay Board
Input Contact Isolator Board
Options
Comms Board
Internal Modem
Network Interface Card NIC
Inline Panelboards
Key Lockout Switch
Static Switch Redundant Output Breaker
Remote Source Selection
Outline drawing, 250A STS2/PDU
Installation Drawings
Installation Drawings
Installation Drawings
Installation Drawings
Installation Drawings
Installation Drawings
Installation Drawings
Installation Drawings
Installation Drawings
Installation Drawings
Installation Drawings
Installation Drawings
Installation Drawings
Installation Drawings
Installation Drawings
Installation Drawings
Installation Drawings
Electrical field connections, 250A STS2/PDU input with CB3
Installation Drawings
Installation Drawings
Installation Drawings
Electrical field connections, 800A STS2/PDU input with CB3
Installation Drawings
Installation Drawings
Installation Drawings
Installation Drawings
Installation Drawings
Installation Drawings
Installation Drawings
Installation Drawings
Installation Drawings
Installation Drawings
Installation Drawings
Installation Drawings
Installation Drawings
Installation Drawings
Installation Drawings
Installation Drawings
Control wiring, 800A STS2/PDU, left side distribution
Control wiring, 800A STS2/PDU, right side distribution
Control connection location, 250A STS2/PDU
Control connection location, 400-800A STS2/PDU
Installation Drawings
Control wiring for the programmable relay board option
Control wiring for the input contact isolator board option
Control wiring for comms board
Control wiring for the internal modem option
Control wiring for the Network Interface Card NIC option
Control wiring for the RS-232 Port
Control wiring for remote source selection option
Color LCD touch screen display
Circuit Breakers
Input circuit breaker schedule, 250-800A
Output circuit breaker schedule, 250-800A
Non-automatic breaker schedule, 250-800A
System Description
Introduction to STS2/PDU Operations
Redundancy
Normal Preferred Source
Factory Backup and Service Assistance
Modes of Operation
Reliability and Agency Requirements
Bypass
Operator Controls
Transfer
Transfer Inhibit
Theory of Operation
General Description
Detailed Component Description
SCRs
Audible Alarm
Firmware
Circuit Breakers and Non-Automatic Circuit Breakers
Operating Instructions
Normal System Turn-On
Manual Transfer / Preferred Source Selection
To manually select the preferred source
Enabling Remote Source Selection
Gate board viewing slot locations
Maintenance Bypass
To return to the normal mode
Bypass Procedures for Source
Shutdown in Static Transfer Switch Mode
To return to normal mode
Normal System Shutdown
Shutdown in Maintenance Bypass Mode
Event Mask
Alarms and Faults
Event Log
Event and History Logs
Alarm Notes
List of Messages
History Log
Event messages
Alarm Message Description/Cause Action
Sources OUT of Sync
Communication Interfaces
Keys Function
Using the RS-232 Port
Connecting and Using a Terminal
Terminal commands
Configuring the STS2/PDU via the Terminal
Groups Parameter
Item Parameter
Bitpacked Options With the Terminal
Value Parameter
Value types
Type Definition
Group settings and values
Setting Bitpacked Options With the Terminal
Options1
Comms Options
Binary Hex Value Equivalent
Critical Option Enabling
Non-Critical Option Enab
Binary-hexadecimal conversions
Setting Event Masks with the Terminal
Putting the Terminal Command Together
Examples of Event Mask Settings
Touch Screen Display
Display Overview
Backspace
Menu Overview
Changes disabled Changes enabled
Using the Optional Key Lockout Switch
Using the Password
To set or reset the password
Event Display
Configuration Menu
Mimic Display
Event Controls
To set the event masks
Event Masks
User Settings
To access the User Settings dialog box
Source Setpoints
To configure the setpoints for each source
Button Range Default Comments
Setpoint parameters
103
PDU Setpoints
System Settings
To access the System Settings menu
Button Range Default Resolution
Configuring the Modem
Comm Options
Option buttons
Modem dialog box
To configure the modem
107
To configure the Input Contact Isolator relays
Configuring the Input Contact Isolator Settings
Configuring the Programmable Relay Board Settings
Standard settings for programmable relays
Relay Setting Definition
If the optional OpenComms NIC is installed in the STS2/PDU
Configuring the Network Interface Card
Dual Output Breaker
SiteScan Configuration
Saving Your Communications Configurations
System Options
PDU
To use the Event Log
Logs
Cleaning the LCD Touch Screen
Specifications
System Configuration
Response Time
System Components
Electrical Requirements
Surge Suppression
Frame sizes
Frame and Enclosure
Caster and Leveling 250A only
Cooling
Doors
Access
Circuit Breakers
Cable Entrance
MTA plug pinout
Pin Signal Name Function / Comments
14.2.9 RS-232 Port
Terminal Port Connections
Fuseless Design
Maintenance Bypass
See 10.4 Maintenance Bypass for instructions
14.2.11 RS-232 Interface Parameters
Key
Event Message Help Text
122
PWR Sply DC a Fail
PWR Sply DC B Fail
PWR Sply S1 AC Fail
OUT Volt Sense Fail
PWR Sply S2 AC Fail
S1 Volt Sense Fail
S2 Volt Sense Fail
S1 SCR Sense Fail
S2 SCR Sense Fail
S1 Curr Sense Fail
S2 Curr Sense Fail
CB1 Shunt Trip Fail
Internal Comm Fail
CB2 Shunt Trip Fail
Input 1 Surge Failure
Input 2 Surge Failure
Heat Sink Overtemp
S1 UV
S1 UV RMS
S2 UV
S1 OV
S1 OF/UF
S1 Fail
S2 UF/OF
S2 UV RMS
S2 Fail
S1 I-PEAK
CB1 S1 Open
Load on ALT Source
CB3 Output Open
CB2 S2 Open
CB4 S1 BYP Closed
CB5 S1 BYP Closed
Transfer Inhibited
CB3A Output Open
Input 1 Undervoltage
Output UV
History LOG Frozen
Input 1 Overvoltage
Ground Overcurrent
Input 2 Overvoltage
Input 2 Undervoltage
Load Overcurrent
Load Voltage THD
Neutral Overcurrent
Input 2 OF/UF
Input 1 OF/UF
141
142
Transfer Counter Cleared
Changing the Air Filter
Testing the STS2/PDU
Maintenance
Proper Tightening of Nuts and Bolts
Programmable Relay Board Settings
Customer Settings
Programmable relay board settings record
Input Contact Isolator Settings
Input contact isolator settings record
Channel PRB Notes
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