Replacing a Cisco AC/DC Power System Circuit Breaker

Table Of Contents

Replacing a Cisco AC/DC Power System Circuit Breaker

Safety Information

Remove Circuit Breakers

Install Circuit Breakers

Obtaining Documentation

Cisco.com

Ordering Documentation

Documentation Feedback

Obtaining Technical Assistance

Cisco Technical Support Website

Submitting a Service Request

Definitions of Service Request Severity

Obtaining Additional Publications and Information

Replacing a Cisco AC/DC Power System Circuit Breaker

This document explains how to install or replace Cisco AC/DC Power System circuit breakers in the field. It contains the following sections:

• Safety Information

• Remove Circuit Breakers

• Install Circuit Breakers

• Obtaining Documentation

• Documentation Feedback

• Obtaining Technical Assistance

• Obtaining Additional Publications and Information

Safety Information

The following warnings and guidelines should be followed to ensure personal safety and to protect the Cisco AC/DC Power System.

Warning Only trained and qualified personnel should be allowed to install, replace, or service this equipment. Statement 1030

Warning Before working on a chassis or working near power supplies, unplug the power cord on AC units; disconnect the power at the circuit breaker on DC units. Statement 12

Warning Before working on equipment that is connected to power lines, remove jewelry (including rings, necklaces, and watches). Metal objects will heat up when connected to power and ground and can cause serious burns or weld the metal object to the terminals. Statement 43

Keep the system area clear and dust-free during and after the installation.

When removing or installing circuit breakers they should be in the OFF position.

Remove Circuit Breakers

Step 1 Make certain all breakers to be replaced are in the OFF position ( Figure 1).

Figure 1 Circuit Breaker On/Off Positions

Step 2 Remove the 1 RU Distribution Shelf faceplate by loosening the two thumbscrews on the shelf faceplate ( Figure 2).

Figure 2 Removing the 1 RU Distribution Shelf Faceplate

Step 3 Locate the breaker that is to be removed.

Step 4 Grasp the breaker firmly at the front and pull it out until the quick disconnects disengage from their mounts.

Figure 3 Removing a Circuit Breaker

Step 5 Remove the alarm cable connections from the rear of the breaker ( Figure 3).

Step 6 Pull the breaker straight out from the 1 RU Distribution Shelf.

Install Circuit Breakers

Step 1 Make certain the new breaker is in the OFF position.

Step 2 Locate the circuit breaker installation locations inside the 1 RU Distribution Shelf (positions A1, A2, B1, and B2). Circuit breakers should be installed with the protective hood (covering the "ON" position) on the left side of the shelf to allow the 1 RU Distribution Shelf faceplate to be correctly installed ( Figure 1).

Step 3 Attach the circuit breaker alarm cables to the rear of the circuit breaker (see Table 1). The alarm cables are labeled C (Common) and NC (Normally Closed) and are attached to the positions shown in Figure 4.

Step 4 Gently slide the breaker in so that the quick-disconnect plugs are aligned with the mounting holes ( Figure 4).

Table 1 Circuit Breaker Positions

System Size

A1

A2

B1

B2

Small

n/a

n/a

n/a

n/a

Medium

X

¹

X

²

Large

X

X

X

X

¹Future Upgrade

²Future Upgrade

Step 5 Push the breaker in until the quick-disconnect plugs are firmly seated in the mounting holes.

Step 6 Repeat for additional breakers.

Step 7 Replace the 1 RU Distribution Shelf faceplate and tighten the thumbscrews.

Step 8 Turn the new circuit breaker ON.

Figure 4 Installing a Circuit Breaker

Obtaining Documentation

Cisco documentation and additional literature are available on Cisco.com. Cisco also provides several ways to obtain technical assistance and other technical resources. These sections explain how to obtain technical information from Cisco Systems.

Cisco.com

You can access the most current Cisco documentation at this URL:

http://www.cisco.com/univercd/home/home.htm

You can access the Cisco website at this URL:

http://www.cisco.com

You can access international Cisco websites at this URL:

http://www.cisco.com/public/countries_languages.shtml

Ordering Documentation

You can find instructions for ordering documentation at this URL:

http://www.cisco.com/univercd/cc/td/doc/es_inpck/pdi.htm

You can order Cisco documentation in these ways:

•Registered Cisco.com users (Cisco direct customers) can order Cisco product documentation from the Ordering tool:

http://www.cisco.com/en/US/partner/ordering/index.shtml

•Nonregistered Cisco.com users can order documentation through a local account representative by calling Cisco Systems Corporate Headquarters (California, USA) at 408 526-7208 or, elsewhere in North America, by calling 1 800 553-NETS (6387).

Documentation Feedback

You can send comments about technical documentation to bug-doc@cisco.com.

You can submit comments by using the response card (if present) behind the front cover of your document or by writing to the following address:

Cisco Systems
Attn: Customer Document Ordering
170 West Tasman Drive
San Jose, CA 95134-9883

We appreciate your comments.

Obtaining Technical Assistance

For all customers, partners, resellers, and distributors who hold valid Cisco service contracts, Cisco Technical Support provides 24-hour-a-day, award-winning technical assistance. The Cisco Technical Support Website on Cisco.com features extensive online support resources. In addition, Cisco Technical Assistance Center (TAC) engineers provide telephone support. If you do not hold a valid Cisco service contract, contact your reseller.

Cisco Technical Support Website

The Cisco Technical Support Website provides online documents and tools for troubleshooting and resolving technical issues with Cisco products and technologies. The website is available 24 hours a day, 365 days a year, at this URL:

http://www.cisco.com/techsupport

Access to all tools on the Cisco Technical Support Website requires a Cisco.com user ID and password. If you have a valid service contract but do not have a user ID or password, you can register at this URL:

http://tools.cisco.com/RPF/register/register.do

Note Use the Cisco Product Identification (CPI) tool to locate your product serial number before submitting a web or phone request for service. You can access the CPI tool from the Cisco Technical Support Website by clicking the Tools & Resources link under Documentation & Tools. Choose Cisco Product Identification Tool from the Alphabetical Index drop-down list, or click the Cisco Product Identification Tool link under Alerts & RMAs. The CPI tool offers three search options: by product ID or model name; by tree view; or for certain products, by copying and pasting show command output. Search results show an illustration of your product with the serial number label location highlighted. Locate the serial number label on your product and record the information before placing a service call.

Submitting a Service Request

Using the online TAC Service Request Tool is the fastest way to open S3 and S4 service requests. (S3 and S4 service requests are those in which your network is minimally impaired or for which you require product information.) After you describe your situation, the TAC Service Request Tool provides recommended solutions. If your issue is not resolved using the recommended resources, your service request is assigned to a Cisco TAC engineer. The TAC Service Request Tool is located at this URL:

http://www.cisco.com/techsupport/servicerequest

For S1 or S2 service requests or if you do not have Internet access, contact the Cisco TAC by telephone. (S1 or S2 service requests are those in which your production network is down or severely degraded.) Cisco TAC engineers are assigned immediately to S1 and S2 service requests to help keep your business operations running smoothly.

To open a service request by telephone, use one of the following numbers:

Asia-Pacific: +61 2 8446 7411 (Australia: 1 800 805 227)
EMEA: +32 2 704 55 55
USA: 1 800 553-2447

For a complete list of Cisco TAC contacts, go to this URL:

http://www.cisco.com/techsupport/contacts

Definitions of Service Request Severity

To ensure that all service requests are reported in a standard format, Cisco has established severity definitions.

Severity 1 (S1)—Your network is "down," or there is a critical impact to your business operations. You and Cisco will commit all necessary resources around the clock to resolve the situation.

Severity 2 (S2)—Operation of an existing network is severely degraded, or significant aspects of your business operation are negatively affected by inadequate performance of Cisco products. You and Cisco will commit full-time resources during normal business hours to resolve the situation.

Severity 3 (S3)—Operational performance of your network is impaired, but most business operations remain functional. You and Cisco will commit resources during normal business hours to restore service to satisfactory levels.

Severity 4 (S4)—You require information or assistance with Cisco product capabilities, installation, or configuration. There is little or no effect on your business operations.

Obtaining Additional Publications and Information

Information about Cisco products, technologies, and network solutions is available from various online and printed sources.

•Cisco Marketplace provides a variety of Cisco books, reference guides, and logo merchandise. Visit Cisco Marketplace, the company store, at this URL:

http://www.cisco.com/go/marketplace/

•The Cisco Product Catalog describes the networking products offered by Cisco Systems, as well as ordering and customer support services. Access the Cisco Product Catalog at this URL:

http://cisco.com/univercd/cc/td/doc/pcat/

•Cisco Press publishes a wide range of general networking, training and certification titles. Both new and experienced users will benefit from these publications. For current Cisco Press titles and other information, go to Cisco Press at this URL:

http://www.ciscopress.com

•Packet magazine is the Cisco Systems technical user magazine for maximizing Internet and networking investments. Each quarter, Packet delivers coverage of the latest industry trends, technology breakthroughs, and Cisco products and solutions, as well as network deployment and troubleshooting tips, configuration examples, customer case studies, certification and training information, and links to scores of in-depth online resources. You can access Packet magazine at this URL:

http://www.cisco.com/packet

•iQ Magazine is the quarterly publication from Cisco Systems designed to help growing companies learn how they can use technology to increase revenue, streamline their business, and expand services. The publication identifies the challenges facing these companies and the technologies to help solve them, using real-world case studies and business strategies to help readers make sound technology investment decisions. You can access iQ Magazine at this URL:

http://www.cisco.com/go/iqmagazine

•Internet Protocol Journal is a quarterly journal published by Cisco Systems for engineering professionals involved in designing, developing, and operating public and private internets and intranets. You can access the Internet Protocol Journal at this URL:

http://www.cisco.com/ipj

•World-class networking training is available from Cisco. You can view current offerings at this URL:

http://www.cisco.com/en/US/learning/index.html

Copyright � 2006 Cisco Systems, Inc. All rights reserved.