Enclosed switchboard

• US 9,608,413 B2
• Filed: 05/30/2012
• Issued: 03/28/2017
• Est. Priority Date: 07/29/2011
• Status: Active Grant

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: Kubota, Kazuyoshi, Miyanishi, Makoto
• Primary Examiner(s): Pape, Zachary M
• Assistant Examiner(s): Jalali, Amir
• Application Number:
  US14/126,724
• Publication Number:
  US 20140118890A1
• Time in Patent Office: 1,763 Days
• Field of Search: 361/601, 361/605, 361/611, 361615-616, 361/622, 361/624, 361626-628, 361631-632, 361/634, 361/637, 361/639, 361/641, 361643-644, 361/648, 361/652, 361/647, 361/800, 361/810, 361/816, 361/819, 361/826, 361828-829, 361/832, 361/837, 174 681- 682, 174/149, 174/387, 174/390, 340/635, 218/44, 218 74- 76, 218/152
• US Class Current: 1/1
• CPC Class Codes: H02B 1/06 having associated enclosures, e.g. for preventing access to live parts
• CPC Class Codes: H02B 1/202 Cable lay-outs
• CPC Class Codes: H02B 1/24 Circuit arrangements for boards or switchyards
• CPC Class Codes: H02B 1/26 Casings; Parts thereof or accessories therefor
• CPC Class Codes: H02B 1/301 mainly consisting of a frame onto which plates are mounted
• CPC Class Codes: H02B 1/303 Bases or feet
• CPC Class Codes: H02B 1/46 Boxes; Parts thereof or accessories therefor
• CPC Class Codes: H02B 1/54 Anti-seismic devices or installations
• CPC Class Codes: H02B 1/56 Cooling; Ventilation
• CPC Class Codes: H02B 11/12 with isolation by horizontal withdrawal

Abstract

An enclosed switchboard includes: a device containing board which contains main circuit devices such as circuit breakers; and a cable connection board which is arranged side by side adjacently to the device containing board, and contains cables that input and output electric power to/from the main circuit devices. In the enclosed switchboard, the cable connection board is configured by one housing; and the inside of the housing is divided into two by a partition plate to be comparted to a cable lead-in compartment which contains lead-in side cables and a cable lead-out compartment which contains lead-out side cables.

Claims

1. An enclosed switchboard comprising a housing which includes:

a circuit breaker compartment which contains circuit breakers stacked in upper and lower stages;

a busbar compartment which contains busbars connected to each of said circuit breakers; and

an upper stage cable compartment located above a lower stage cable compartment, each of the upper stage and lower stage cable compartments contains cables connected to each of said circuit breakers,

said busbar compartment and said upper stage and lower stage cable compartments being arranged behind said circuit breaker compartment,

wherein said housing is arranged in plural rows and includes air heat insulation layers for shielding heat, each of said air heat insulation layers being provided;

between both adjacent side walls of said housings disposed in parallel;

on a ceiling portion of said circuit breaker compartment;

on a partition portion between said circuit breakers stacked in upper and lower stages;

on a partition portion between said upper stage cable compartment and said lower stage cable compartment; and

on a back wall portion of said circuit breaker compartment, the back wall portion coming into contact with said busbar compartment and either one or both of said upper stage and lower stage cable compartments.

2. The enclosed switchboard according to claim 1,

further comprising metallic barriers disposed between a main circuit and a control circuit of said circuit breaker in said circuit breaker compartment,

whereby said control circuit is protected by blocking flames of a fire disaster occurred in said main circuit.

3. The enclosed switchboard according to claim 2,

wherein said main circuit and said control circuit of said circuit breaker in said upper stage are arranged at a higher level than a lower end of said busbar compartment.

4. The enclosed switchboard according to claim 1, wherein the entire partition portion between said upper stage cable compartment and said lower stage cable compartment is below the partition portion between said circuit breakers stacked in upper and lower stages.