This document provides an overview of fire alarm system fundamentals and electrical requirements according to NFPA 70 Article 760. It discusses why fire alarm systems are installed, their components and classifications. NFPA 70 Article 760 divides fire alarm systems into non-power limited and power limited circuits. It outlines the power sources, wiring methods, and installation requirements for both non-power limited and power limited fire alarm circuits according to the National Electrical Code.
MV Switchgear provides centralized control and protection of medium-voltage power equipment and circuits in industrial, commercial, and utility installations involving generators, motors, feeder circuits, and transmission and distribution lines.
Quý khách có nhu cầu mua hàng hoặc hợp tác cùng chúng tôi xin vui lòng liên hệ theo địa chỉ :
CÔNG TY CỔ PHẦN HẠO PHƯƠNG
Trụ sở chính:
Địa chỉ: Số 88 đường Vĩnh Phú 40, Kp. Hòa Long, P. Vĩnh Phú, Thuận An, Bình Dương.
Văn phòng Hà Nội:
Địa chỉ: Số 95 TT4 - KĐT Mỹ Đình Sông Đà - Phường Mỹ Đình - Q. Nam Từ Liêm - Hà Nội
Chi nhánh Cambodia:
Địa chỉ: The Park Land SenSok, Borey Chip Mong, House Number 22, P11.Sangkat Phnom Penh Thmey, Khan San Sok, Phnom Penh.
Email: cs@haophuong.com - Website: haophuong.com
Facebook: https://www.facebook.com/haophuongcompany/
HOTLINE: 1800 6547
MV Switchgear provides centralized control and protection of medium-voltage power equipment and circuits in industrial, commercial, and utility installations involving generators, motors, feeder circuits, and transmission and distribution lines.
Quý khách có nhu cầu mua hàng hoặc hợp tác cùng chúng tôi xin vui lòng liên hệ theo địa chỉ :
CÔNG TY CỔ PHẦN HẠO PHƯƠNG
Trụ sở chính:
Địa chỉ: Số 88 đường Vĩnh Phú 40, Kp. Hòa Long, P. Vĩnh Phú, Thuận An, Bình Dương.
Văn phòng Hà Nội:
Địa chỉ: Số 95 TT4 - KĐT Mỹ Đình Sông Đà - Phường Mỹ Đình - Q. Nam Từ Liêm - Hà Nội
Chi nhánh Cambodia:
Địa chỉ: The Park Land SenSok, Borey Chip Mong, House Number 22, P11.Sangkat Phnom Penh Thmey, Khan San Sok, Phnom Penh.
Email: cs@haophuong.com - Website: haophuong.com
Facebook: https://www.facebook.com/haophuongcompany/
HOTLINE: 1800 6547
Circuit BreakersA circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by excess current from an overload or short circuit. Its basic function is to interrupt current flow after a fault is detected.
I would like to share some knowledge of surge protection devices.
This presentation highlights some concepts of surge and surge protectors.
Presentation Index is as follows:
> Types of Surge
> Sources of Surge
> Surge Current & Voltage waveform
> Importance of Surge Protectors
> Types of Surge protectors
> Location of Surge Protectors
Isolation Procedures for Safe Working on Electrical Systems and Equipment by the JIB | solation Procedures for Safe Working on Electrical Systems and Equipment
This chart shows the safe isolation procedure that you should use when working on electrical systems and equipment.
You'll receive a printed copy of this from your Training Provider, but it's also here as a handy reference to keep electronically.
THE RULES OF SAFE ISOLATION ARE:
Obtain permission to start work (a Permit may be required in some situations)
Identify the source(s) of supply using an approved voltage indicator or test lamp
Prove that the approved voltage indicator or test lamp is functioning correctly
Isolate the supply(s)
Secure the isolation
Prove the system/equipment is DEAD using an approved voltage indicator or test lamp
Prove that the approved voltage indicator or test lamp is functioning correctly
Put up warning signs to tell other people that the electrical installation has been isolated
Once the system/equipment is proved DEAD, work can begin
Uploaded by THORNE & DERRICK LV HV Jointing, Earthing, Substation & Electrical Eqpt | Explosive Atmosphere Experts & ATEX IECEx.
UNIDAD I. FILOSOFÍA DE LA PROTECCIÓN DE
SISTEMAS ELÉCTRICOS.
UNIDAD II. PRINCIPIOS Y CARACTERÍSTICAS DE
FUNCIONAMIENTO DE LOS RELÉS.
UNIDAD III. PROTECCIÓN DE SOBRECORRIENTE.
UNIDAD IV. PROTECCIÓN DE DISTANCIA.
UNIDAD V. RELÉS DIFERENCIALES.
UNIDAD VI. RELÉS DE APLICACIÓN ESPECIAL.
UNIDAD VII. PROTECCIÓN POR HILO PILOTO.
UNIDAD VIII. RELÉS ELECTRÓNICOS
Circuit BreakersA circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by excess current from an overload or short circuit. Its basic function is to interrupt current flow after a fault is detected.
I would like to share some knowledge of surge protection devices.
This presentation highlights some concepts of surge and surge protectors.
Presentation Index is as follows:
> Types of Surge
> Sources of Surge
> Surge Current & Voltage waveform
> Importance of Surge Protectors
> Types of Surge protectors
> Location of Surge Protectors
Isolation Procedures for Safe Working on Electrical Systems and Equipment by the JIB | solation Procedures for Safe Working on Electrical Systems and Equipment
This chart shows the safe isolation procedure that you should use when working on electrical systems and equipment.
You'll receive a printed copy of this from your Training Provider, but it's also here as a handy reference to keep electronically.
THE RULES OF SAFE ISOLATION ARE:
Obtain permission to start work (a Permit may be required in some situations)
Identify the source(s) of supply using an approved voltage indicator or test lamp
Prove that the approved voltage indicator or test lamp is functioning correctly
Isolate the supply(s)
Secure the isolation
Prove the system/equipment is DEAD using an approved voltage indicator or test lamp
Prove that the approved voltage indicator or test lamp is functioning correctly
Put up warning signs to tell other people that the electrical installation has been isolated
Once the system/equipment is proved DEAD, work can begin
Uploaded by THORNE & DERRICK LV HV Jointing, Earthing, Substation & Electrical Eqpt | Explosive Atmosphere Experts & ATEX IECEx.
UNIDAD I. FILOSOFÍA DE LA PROTECCIÓN DE
SISTEMAS ELÉCTRICOS.
UNIDAD II. PRINCIPIOS Y CARACTERÍSTICAS DE
FUNCIONAMIENTO DE LOS RELÉS.
UNIDAD III. PROTECCIÓN DE SOBRECORRIENTE.
UNIDAD IV. PROTECCIÓN DE DISTANCIA.
UNIDAD V. RELÉS DIFERENCIALES.
UNIDAD VI. RELÉS DE APLICACIÓN ESPECIAL.
UNIDAD VII. PROTECCIÓN POR HILO PILOTO.
UNIDAD VIII. RELÉS ELECTRÓNICOS
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
Student information management system project report ii.pdfKamal Acharya
Our project explains about the student management. This project mainly explains the various actions related to student details. This project shows some ease in adding, editing and deleting the student details. It also provides a less time consuming process for viewing, adding, editing and deleting the marks of the students.
NO1 Uk best vashikaran specialist in delhi vashikaran baba near me online vas...Amil Baba Dawood bangali
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Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
1. Fire Alarm SystemFire Alarm System
FundamentalsFundamentals
Why do we install fire alarm systems?Why do we install fire alarm systems?
Fire alarm systems classificationFire alarm systems classification
Fire alarm system componentsFire alarm system components
Electrical requirementsElectrical requirements
Riser diagramRiser diagram
Design fundamentalsDesign fundamentals
Codes and standardsCodes and standards
2. NFPA 70 Article 760NFPA 70 Article 760
• Divided into 3 partsDivided into 3 parts
– Part 1 and 2; non-power limitedPart 1 and 2; non-power limited
– Part 3; power limitedPart 3; power limited
• References to other articlesReferences to other articles
– 250, 300, 348, 350, 800, …250, 300, 348, 350, 800, …
• Wiring methods and exceptionsWiring methods and exceptions
• CI CableCI Cable
• Hierarchical table of substitutionsHierarchical table of substitutions
Electrical RequirementsElectrical Requirements
8. NPLFA Circuit Power SourceNPLFA Circuit Power Source
RequirementsRequirements
The power source of non-power-The power source of non-power-
limited fire alarm circuits shalllimited fire alarm circuits shall
comply with Chapters 1 through 4comply with Chapters 1 through 4
and the output shall not be moreand the output shall not be more
than 600 volts, nominal. Thesethan 600 volts, nominal. These
circuits shall not be suppliedcircuits shall not be supplied
through ground-fault circuitthrough ground-fault circuit
interrupters.interrupters.
14. Power-Limited Sources for PLFAPower-Limited Sources for PLFA
CircuitsCircuits
(A)(A) TRANSFORMERS. A listed PLFA orTRANSFORMERS. A listed PLFA or
Class 3 transformer.Class 3 transformer.
(B)(B) POWER SUPPLIES. A listed PLFAPOWER SUPPLIES. A listed PLFA
or Class 3 power supply.or Class 3 power supply.
(C)(C) LISTED EQUIPMENT. ListedLISTED EQUIPMENT. Listed
equipment marked to identify theequipment marked to identify the
PLFA power source.PLFA power source.
15. PLFA Wiring Methods andPLFA Wiring Methods and
MaterialsMaterials
(1). Exposed or Fished in Concealed(1). Exposed or Fished in Concealed
SpacesSpaces
(2). Passing Through a Floor or Wall(2). Passing Through a Floor or Wall
(3). In Hoistways(3). In Hoistways
16. Installation of Conductors andInstallation of Conductors and
Equipment in Cables, Compartments,Equipment in Cables, Compartments,
Cable Trays, Enclosures, Manholes,Cable Trays, Enclosures, Manholes,
Outlet Boxes, Device Boxes, andOutlet Boxes, Device Boxes, and
Raceways for Power-Limited CircuitsRaceways for Power-Limited Circuits
Conductors and equipment for power-Conductors and equipment for power-
limited fire alarm circuits shall belimited fire alarm circuits shall be
installed in accordance with 760.136installed in accordance with 760.136
through 760.143.through 760.143.
Use example of notification zone that passes through another zone
Supported from structure parallel or perpendicular to building lines.
24output/120 input x 25[14AWG]=5amp (overcurrent protection device on input side)
Overcurrent devices shall be located where the conductor to be protected receives its supply=760.24
Open wiring method or conduit allowed, must splice or terminate in box
Construction methods may reduce need for CI cable
1)Protected to within 7 feet of floor, secured every 18 inches 2)in raceway unless building construction provides adequate protection 3)in conduit
760.54 barriers, raceway within an enclosure, associated systems in enclosures, separation of conductors
Table 725.61 Cable Uses and Permitted Substitutions [see handout] Red book page 304, 305
