8.2.3SMB Circuit Breakers
The System Maintenance Bypass (SMB) contains two breakers: the Maintenance Bypass Breaker (MBP) and the Maintenance Isolation Breaker (MIS). The MIS connects the output of the UPMs to the critical load via CBS. The MBP is used as the bypass in the event the output of the SSBM is not available and to supply the critical load during SSBM maintenance. These breakers are manually controlled through electrical interlocks which include a control switch mounted inside the Control Section on the A1 Panel.
8.2.4Fully Rated Static Switch
The fully rated static switch is connected in series with the FBP and is only gated on during emergency transfers from Normal to Bypass mode. The fully rated static switch is electrically controlled by the SSBM and is automatic in operation.
8.2.5EMERGENCY UPM OFF
An EMERGENCY UPM OFF pushbutton is provided for situations where you must instantaneously control the UPM and SSBM output. The pushbutton is located on the front of the SSBM for quick access and is covered with a clear plastic shield to prevent inadvertent operation. The shield must be raised before pressing the pushbutton. The EMERGENCY UPM OFF pushbutton is described in detail in Chapter 10, “Operating Instructions for the Parallel Capacity/Redundant System.”
8.2.6Customer Interface Panel
PowerNet
Two redundant control networks connect UPM to UPM and UPM to the SSBM. Each network requires only one shielded twisted pair of wires. Refer to Appendix A, drawing 164201335
Computer Interface
Two serial communications ports are standard on all units, and are electrically isolated from the SSBM. You can use these ports to link the SSBM to the features described in Chapter 13, “Serial Communications” and Chapter 14, “Remote Notification.”
Summary Alarm Contacts
Alarm contacts are provided for connection to equipment at your facility, such as a light, an audible alarm, or a computer terminal. The equipment you connect to these contacts alerts you to an SSBM alarm. This feature is described further in Chapter 11, “Using Features and Options.”
Building Alarm Monitoring
You can connect your facility’s alarm system contacts to six inputs in the SSBM. The SSBM uses these inputs to monitor your building alarms in addition to the SSBM status. This feature is described further in Chapter 11, “Using Features and Options.”
8.2.7Customer Convenience Outlet
An uninterruptible 120VAC, 0.2 amp,
8.2.8Installation Features
Power wiring can be routed through the top or bottom of each cabinet. External sensing and monitoring control wire must be installed in accordance with Class 1 wiring methods. Class 1 wiring can be routed through the top or bottom of each cabinet.
Powerware 9315 Parallel Capacity/Redundant System with PHP SSBM | |
| 164201373 Rev. A 092402 |
