This is a great guide to surge protection from Hager and if you would like Hager Surge Protection fitted to your Bypass Switches Input for mains one or two please call us on 0800 978 8988 or email sales@criticalpowersupplies.co.uk
Critical Power Supplies provide a range of surge protection kits that can be fitted to any of our bypass switches or consumer units to meet Amendment 1 of the 17th Edition.
The surge protection devices in the kit offer type 2 protection to the BS EN 61643 standard, to ensure conformity with the current edition of BS 7671.
Amendment 1 of the 17th Edition requires electricians to conduct a risk assessment of properties to see if they require surge protection.
When you consider that many homes have a lot of sensitive electronic equipment, such as TVs, Hi-Fis, PCs and printers that would be adversely affected by a voltage surge, then the need for such devices increases.
Transient overvoltages are not just caused by a direct lightning strike, a nearby strike, within a kilometre, can cause substantial damage. Other causes can be fluctuations in the power supply or from equipment such as microwaves or showers being switched.
Our surge protection kit can prevent the spread of overvoltages in electrical installations and protect the equipment connected to it. It is characterised by an 8/20us current wave.
To gain a greateer understanding of Surge Protection and our Surge Protection Kit & Devices download a copy of our Guide to Surge Protection Devices.
This is a great guide to surge protection from Hager and if you would like Hager Surge Protection fitted to your Bypass Switches Input for mains one or two please call us on 0800 978 8988 or email sales@criticalpowersupplies.co.uk
Critical Power Supplies provide a range of surge protection kits that can be fitted to any of our bypass switches or consumer units to meet Amendment 1 of the 17th Edition.
The surge protection devices in the kit offer type 2 protection to the BS EN 61643 standard, to ensure conformity with the current edition of BS 7671.
Amendment 1 of the 17th Edition requires electricians to conduct a risk assessment of properties to see if they require surge protection.
When you consider that many homes have a lot of sensitive electronic equipment, such as TVs, Hi-Fis, PCs and printers that would be adversely affected by a voltage surge, then the need for such devices increases.
Transient overvoltages are not just caused by a direct lightning strike, a nearby strike, within a kilometre, can cause substantial damage. Other causes can be fluctuations in the power supply or from equipment such as microwaves or showers being switched.
Our surge protection kit can prevent the spread of overvoltages in electrical installations and protect the equipment connected to it. It is characterised by an 8/20us current wave.
To gain a greateer understanding of Surge Protection and our Surge Protection Kit & Devices download a copy of our Guide to Surge Protection Devices.
the handbook contains some basic information about the use of surge arresters and how they work.
the electrical and mechanical design of a surge arrester.
Fiction is a form of narrative, one of the four rhetorical modes of discourse. Fiction-writing also has modes for fiction-writing: action, exposition, description, dialogue, summary, and transition (Morrell 2006, p. 127). Author Peter Selgin refers to methods, including action, dialogue, thoughts, summary, scene, and description (Selgin 2007, p. 38). Currently, there is no consensus within the writing community regarding the number and composition of fiction-writing modes and their uses.
Description is the fiction-writing mode for transmitting a mental image of the particulars of a story. Together with dialogue, narration, exposition, and summarization, description is one of the most widely recognized of the fiction-writing modes. As stated in Writing from A to Z, edited by Kirk Polking, description is more than the amassing of details; it is bringing something to life by carefully choosing and arranging words and phrases to produce the desired effect (Polking 1990, p. 106). The most appropriate and effective techniques for presenting description are a matter of ongoing discussion among writers and writing coaches.Fiction is a form of narrative, one of the four rhetorical modes of discourse. Fiction-writing also has modes for fiction-writing: action, exposition, description, dialogue, summary, and transition (Morrell 2006, p. 127). Author Peter Selgin refers to methods, including action, dialogue, thoughts, summary, scene, and description (Selgin 2007, p. 38). Currently, there is no consensus within the writing community regarding the number and composition of fiction-writing modes and their uses.
Description is the fiction-writing mode for transmitting a mental image of the particulars of a story. Together with dialogue, narration, exposition, and summarization, description is one of the most widely recognized of the fiction-writing modes. As stated in Writing from A to Z, edited by Kirk Polking, description is more than the amassing of details; it is bringing something to life by carefully choosing and arranging words and phrases to produce the desired effect (Polking 1990, p. 106). The most appropriate and effective techniques for presenting description are a matter of ongoing discussion among writers and writing coaches.Fiction is a form of narrative, one of the four rhetorical modes of discourse. Fiction-writing also has modes for fiction-writing: action, exposition, description, dialogue, summary, and transition (Morrell 2006, p. 127). Author Peter Selgin refers to methods, including action, dialogue, thoughts, summary, scene, and description (Selgin 2007, p. 38). Currently, there is no consensus within the writing community regarding the number and composition of fiction-writing modes and their uses.
Description is the fiction-writing mode for transmitting a mental image of the particulars of a story. Together with dialogue, narration, exposition, and summarization, description is one of the most widely recognized of the fiction-w
Designing and testing of metal oxide surge arrester for EHV lineRohit Khare
Surge arresters constitute an indispensable aid to insulation coordination in electrical power systems. There the voltages which may appear in an electrical power system are given in per-unit of the peak value of the highest continuous line-to-earth voltage, depending on the duration of their appearance. The voltage or overvoltage which can be reached without the use of arresters is a value of several p.u. If instead, one considers the curve of the withstand voltage of equipment insulation (here equipment means electrical devices such as power transformers) one notices that starting in the range of switching overvoltages, and especially for lightning over voltages, the equipment insulation cannot withstand the occurring dielectric stresses. At this point, the arresters intervene. When in operation, it is certain that the voltage that occurs at the terminal of the device - while maintaining an adequate safety margin - will stay below the withstand voltage. Arresters’ effect, therefore, involves lightning and switching over voltages.
The time axis is roughly divided into the range of lightning overvoltage (microseconds), switching overvoltages (milliseconds), temporary overvoltages (seconds) – which are commonly cited by the abbreviation "TOV" – and finally the temporally unlimited highest continuous system operation voltage.
POWER SYSTEM PROTECTION
Protection Devices and the Lightning,. protection,
Lightning protection, Introduction
Air Break Switches
Disconnect switches
Grounding switches
Current limiting reactors
Grounding transformers
Co-ordination of protective devices
Grounding of electrical installations
Electric shock
Lightning protection
Lightning Arrestor
the handbook contains some basic information about the use of surge arresters and how they work.
the electrical and mechanical design of a surge arrester.
Fiction is a form of narrative, one of the four rhetorical modes of discourse. Fiction-writing also has modes for fiction-writing: action, exposition, description, dialogue, summary, and transition (Morrell 2006, p. 127). Author Peter Selgin refers to methods, including action, dialogue, thoughts, summary, scene, and description (Selgin 2007, p. 38). Currently, there is no consensus within the writing community regarding the number and composition of fiction-writing modes and their uses.
Description is the fiction-writing mode for transmitting a mental image of the particulars of a story. Together with dialogue, narration, exposition, and summarization, description is one of the most widely recognized of the fiction-writing modes. As stated in Writing from A to Z, edited by Kirk Polking, description is more than the amassing of details; it is bringing something to life by carefully choosing and arranging words and phrases to produce the desired effect (Polking 1990, p. 106). The most appropriate and effective techniques for presenting description are a matter of ongoing discussion among writers and writing coaches.Fiction is a form of narrative, one of the four rhetorical modes of discourse. Fiction-writing also has modes for fiction-writing: action, exposition, description, dialogue, summary, and transition (Morrell 2006, p. 127). Author Peter Selgin refers to methods, including action, dialogue, thoughts, summary, scene, and description (Selgin 2007, p. 38). Currently, there is no consensus within the writing community regarding the number and composition of fiction-writing modes and their uses.
Description is the fiction-writing mode for transmitting a mental image of the particulars of a story. Together with dialogue, narration, exposition, and summarization, description is one of the most widely recognized of the fiction-writing modes. As stated in Writing from A to Z, edited by Kirk Polking, description is more than the amassing of details; it is bringing something to life by carefully choosing and arranging words and phrases to produce the desired effect (Polking 1990, p. 106). The most appropriate and effective techniques for presenting description are a matter of ongoing discussion among writers and writing coaches.Fiction is a form of narrative, one of the four rhetorical modes of discourse. Fiction-writing also has modes for fiction-writing: action, exposition, description, dialogue, summary, and transition (Morrell 2006, p. 127). Author Peter Selgin refers to methods, including action, dialogue, thoughts, summary, scene, and description (Selgin 2007, p. 38). Currently, there is no consensus within the writing community regarding the number and composition of fiction-writing modes and their uses.
Description is the fiction-writing mode for transmitting a mental image of the particulars of a story. Together with dialogue, narration, exposition, and summarization, description is one of the most widely recognized of the fiction-w
Designing and testing of metal oxide surge arrester for EHV lineRohit Khare
Surge arresters constitute an indispensable aid to insulation coordination in electrical power systems. There the voltages which may appear in an electrical power system are given in per-unit of the peak value of the highest continuous line-to-earth voltage, depending on the duration of their appearance. The voltage or overvoltage which can be reached without the use of arresters is a value of several p.u. If instead, one considers the curve of the withstand voltage of equipment insulation (here equipment means electrical devices such as power transformers) one notices that starting in the range of switching overvoltages, and especially for lightning over voltages, the equipment insulation cannot withstand the occurring dielectric stresses. At this point, the arresters intervene. When in operation, it is certain that the voltage that occurs at the terminal of the device - while maintaining an adequate safety margin - will stay below the withstand voltage. Arresters’ effect, therefore, involves lightning and switching over voltages.
The time axis is roughly divided into the range of lightning overvoltage (microseconds), switching overvoltages (milliseconds), temporary overvoltages (seconds) – which are commonly cited by the abbreviation "TOV" – and finally the temporally unlimited highest continuous system operation voltage.
POWER SYSTEM PROTECTION
Protection Devices and the Lightning,. protection,
Lightning protection, Introduction
Air Break Switches
Disconnect switches
Grounding switches
Current limiting reactors
Grounding transformers
Co-ordination of protective devices
Grounding of electrical installations
Electric shock
Lightning protection
Lightning Arrestor
Crest Pak is large automation & more Engineering project on the topic of electricity and its use. With the help of our site, you will not only understand but also fall in love with electrical engineering, electronics, and automation! Electrical and magnetic phenomena in nature, science, and technology. Modern electric power industry, the device of electrical appliances, apparatus and installations, industrial electrical equipment and power supply systems, electric drive, alternative energy sources, and much more.
Crest Pak is large automation & more Engineering project on the topic of electricity and its use. With the help of our site, you will not only understand but also fall in love with electrical engineering, electronics, and automation! Electrical and magnetic phenomena in nature, science, and technology. Modern electric power industry, the device of electrical appliances, apparatus and installations, industrial electrical equipment and power supply systems, electric drive, alternative energy sources, and much more.
The purpose of this IEEE 1692 Abstract is to familiarize the reader with the faults that are accountable for most of the
unexplained lightning related damage, and explain the advantages of blocking technologies that can effectively isolate
and protect communications and other equipment.
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.
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
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.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
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.
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.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)
Clase 02, puesta a tierra
1. Diseño de una
instalación eléctrica
de baja tensión.
Descripción:
Diseño y cálculo de las partes de una
instalación, protecciones, etc...
cumpliendo con la normativa vigente.
INSTALACIONES ELECTRICAS DE B.T.
1
UNIVERSIDAD FRANCISCO
GAVIDIA
ING. JOSUÉ LAZO 1
2. 2
Instalación de Puesta a
Tierra y protección frente
a contactos directos e
indirectos
Tema:
ING. JOSUÉ LAZO 2
3. V(x)=
·Id
··x
Se busca que en todo caso que en el conjunto de instalaciones, edificios y superficies próximas no
aparezcan tensiones peligrosas y que en caso de fallo o descarga atmosférica se permita el paso a tierra
de las corrientes de defecto.
Ejemplo de fallo:
Ejemplo: Electrodo semiesférico enterrado a ras del suelo.
La solución de la distribución de
potencial sería:
Tema 1.0. Instalación de Puesta a Tierra y protección frente a contactos directos
e indirectos
3
3
4. Parámetros que caracterizan una instalación de puesta a tierra
• -Tensión a tierra (Vt): es la
diferencia de potencial entre el
electrodo y un punto
suficientemente alejado,
considerado de V=0 (en el
infinito potencial nulo)
• -Resistencia de puesta a
tierra
(Rt): es el cociente Rt=Vtierra/Id
• -Tensión de contacto (Vc):
es la tensión que se
establece entre dos partes
accesibles ya sean:
-Dos masas
-Masa y tierra
-Masa y conductor
-Conductor y tierra
-etc...
Tema 1.0. Instalación de Puesta a Tierra y protección frente a contactos directos
e indirectos
4
ING. JOSUÉ LAZO 4
5. Tema 1.0. Instalación de Puesta a Tierra y protección frente a contactos directos
e indirectos
ELEMENTOS QUE SE CONECTAN A TIERRA
• Principalmente son:
– Neutros de generadores y
transformadores
– Masas
– Elementos de protección
(pararrayos y seccionadores de
puesta a tierra)
5
ING. JOSUÉ LAZO 5
6. PUESTA A TIERRA DEL NEUTRO DE LA ALIMENTACIÓN
Mientras que las masas de los elementos de generación, transporte y distribución casi siempre se unen a tierra los
neutros de generadores y transformadores pueden estar conectados o aislados de tierra:
A) Neutro aislado. Normalmente no usado en las instalaciones a tratar por esta
asignatura. Antes del fallo:
-No existe una relación directa entre las diferencias de potencial
fases-tierra Si hay un fallo Fase - Tierra entonces:
-La fase que falla se pone a tiera siendo la diferencia de potencial nula (En el gráfico UTt=0V)
-Las otras fases pasan a estar a diferencia de potencia de la tensión de línea. Lo que hace diseñar los
conductores a una mayor tensión de aislamiento (En el gráfico URt=USt= 𝟑Ufase)
-No circula Intensidad de defecto o esta es muy pequeña
-
Tema 1.0. Instalación de Puesta a Tierra y protección frente a contactos directos
e indirectos
6
ING. JOSUÉ LAZO 6
7. PUESTA A TIERRA DEL NEUTRO DE LA ALIMENTACIÓN
B) Neutro a tierra. Es el más comúnmente utilizado y el que en todo caso se
va a tener en cuenta en las instalaciones del curso.
Si hay un fallo Fase - Tierra entonces:
-Se cierra el circuito con Rt: Resistencia total del circuito dedefecto
-Las otras fases continúan a tensiones simples en vez de a tensiones
compuestas como enel apartado anterior
-Circula una corriente de defecto Id
Ventajas TT:
• Con conexión a tierra se somete a
los aislantes a una tensión
menor.
• La corriente de defecto se
puede usar para disparar las
protecciones.
Inconvenientes:
• Circula una corriente de defecto
que puede deteriorar los
elementos
Observaciones IT:
• Conectando el neutro con una
impedancia se puede limitar el
aislado
)
Tema 1.0. Instalación de Puesta a Tierra y protección frente a contactos directos
e indirectos
8
ING. JOSUÉ LAZO 7
8. PUESTA A TIERRA DE LAS MASAS
A) Masa no conectada a tierra
En caso de fallo la masa se pone a la tensión de fase
Umasas=Ufn
Un fallo de fase a masa
supone una puesta de
tensión de la masa pero el
circuito no se cierra por lo
que no hay Id
Este sistema no es válido
salvo para instalaciones
que sean de muy baja
tensión de seguridad.
Tema 1.0. Instalación de Puesta a Tierra y protección frente a contactos directos
e indirectos
9
ING. JOSUÉ LAZO 8
9. Id=
Vfn
RA+RB+Zcon+Rd
Id,max=
U’c=I’d,max·RA= RA<Ufn
B) Masa conectada a tierra
Es el tipo de conexión que se va a utilizar en las instalaciones del
curso. En caso de fallo se cierra el circuito de defecto
apareciendo una
Donde:
RA= Resistencia de puesta a tierra de las masas (~1-100)
RB=Resistencia de puesta a tierra del neutro
Zcon=Resistencia de los conductores (normalmente
despreciable)
Rd=Resistencia del defecto
Por ejemplo para Rd=0 y Zcon=0 (caso más desfavorable)
Ufn
RA+RB
Que lleva a una tensión de contacto menor que lade
fase:
Ufn
RA+RB
La intensidad de defecto permite disparar elementos
de protección. En muchos casos debido a que la
resistencia de puesta a tierra del neutro del CT es
desconocida se tiene en cuenta para la impedancia
de bucle tan sólo la resisten1c0iade la puesta a tierra
Tema 1.0. Instalación de Puesta a Tierra y protección frente a contactos directos
e indirectos
PUESTA A TIERRA DE LAS
MASAS
ING. JOSUÉ LAZO 9
10. • La misión de la toma a tierra busca limitar la
tensión eléctrica que pueda aparecer en
elementos metálicos de la instalación que en
condiciones normales no deberían estar a
tensión.
Sin toma de tierra, la corriente se va a
tierra por el individuo.
La tensión de la carcasa del equipo es
alta
Masas: Carcasas de los
aparatos de la instalación
O elementos conductores
como tuberías o
estructuras metálicas
Con toma de tierra,
la corriente se va
por la instalación
de puesta a tierra.
La tensión de la
carcasa del equipo
es men1o1r
EFECTO DE LA TOMA A TIERRA DE
MASAS
Tema 1.0. Instalación de Puesta a Tierra y protección frente a contactos directos
e indirectos
ING. JOSUÉ LAZO 10
11. Red
Protección
Diferencial
EJEMPLO ESQUEMA TT
SITUACIÓN ANTES DEL FALLO CON TOMA
A TIERRA
r
s
t
n
Entra Ia
Sale Ia
Instalación sana, la
protección está
cerrada al
comprobar que la
corriente que entra
es la misma que
sale
Tema 1.0. Instalación de Puesta a Tierra y protección frente a contactos directos
e indirectos
11
ING. JOSUÉ LAZO
12. SITUACIÓN AL PRODUCIRSE EL FALLO CON
TOMA A TIERRA
Red
Protección
Diferencial
r
s
t
n El cable se pela
por un fallo y se
pone en contacto
también con la
carcasa
Entra Ia
Cae a tierra
Ib
Sale Ic=Ia-Ib
Al producirse el
fallo el diferencial
se da cuenta que
la corriente
entrante difiere de
la saliente y abre
los contactos Abre los contactos si
Ia-Ic=Ib≥In
Siendo In la
sensibilidad del
diferencial
Tema 3.4. Instalación de Puesta a Tierra y protección frente a contactos directos
e indirectos
12
ING. JOSUÉ LAZO
13. Red
Protección
Diferencial
s
t
n
Entra Ia
Sale Ia
SITUACIÓN PELIGROSA AL PRODUCIRSE EL
FALLO Y NO DISPONER DE TOMA A
TIERRA
r
Pese al fallo como
no hay corriente
que derive a tierra,
el diferencial no
detecta el
problema
Al no haber toma
de tierra no pasa
intensidad a tierra
hasta que alguien
toque la carcasa y
cierre el circuito.
La carcasa
además se pone a
una tensión
peligrosa.
Tema 1.0. Instalación de Puesta a Tierra y protección frente a contactos directos
e indirectos
13
ING. JOSUÉ LAZO
15. PELIGRO DEL CONTACTO
ELÉCTRICO
Tema 1.0. Instalación de Puesta a Tierra y protección frente a contactos directos
e indirectos
15
ING. JOSUÉ LAZO
16. Tema 1.0. Instalación de Puesta a Tierra y protección frente a contactos directos
e indirectos
LA IMPEDANCIA DEL CUERPO HUMANO ES UN FACTOR QUE
AFECTA A LA PELIGROSIDAD DEL CONTACTO
16
ING. JOSUÉ LAZO
17. Tema 1.0. Instalación de Puesta a Tierra y protección frente a contactos directos
e indirectos
REGLAS DE
SEGURIDAD
17
ING. JOSUÉ LAZO
18. Tema 3.4. Instalación de Puesta a Tierra y protección frente a contactos directos
e indirectos
18
19. CONCEPTO DE CONTACTO DIRECTO E
INDIRECTO
Tema 1.0. Instalación de Puesta a Tierra y protección frente a contactos directos
e indirectos
19
20. USO DE TOMA A TIERRA E INTERRUPTORES
DIFERENCIALES
PROTECCIÓN CONTRA CONTACTOS
INDIRECTOS
Tema 1.0. Instalación de Puesta a Tierra y protección frente a contactos directos
e indirectos
20
ING. JOSUÉ LAZO
22. ING. JOSUÉ LAZO 22
¿Cómo funciona la vigilancia de la corriente diferencial?
Gracias al uso de sistemas de vigilancia de la corriente diferencial, el usuario recibe un
mensaje, incluso antes de que se alcance el umbral de desconexión de un RCD.
Los RCM (Residual Current Monitor, aparatos de vigilancia de la corriente diferencial) vigilan
las corrientes diferenciales de instalaciones eléctricas, indican el valor actual y avisan si se
superan los valores de activación.
Se pueden utilizar según convenga para realizar avisos y/o para desconectar. Cumplen con la
norma EN 62020 «Pequeña aparamenta eléctrica. Controladores de aislamiento por
corriente diferencial residual (RCM) para usos domésticos y análogos (IEC 62020).
Tema 1.0. Instalación de Puesta a Tierra y protección frente a contactos directos e
indirectos
25. PROTECCIÓN FRENTE A CONTACTOS
INDIRECTOS EN
ESQUEMAS TT
Tema 1.0. Instalación de Puesta a Tierra y protección frente a contactos directos
e indirectos
25
ING. JOSUÉ LAZO
26. EJEMPLO FALLO
ESQUEMA TT
Tema 1.0. Instalación de Puesta a Tierra y protección frente a contactos directos
e indirectos
26
ING. JOSUÉ LAZO
27. DISPOSITIVOS DE PROTECCIÓN FRENTE A CONTACTOS
INDIRECTOS EN TT
Tema 1.0. Instalación de Puesta a Tierra y protección frente a contactos directos
e indirectos
27
ING. JOSUÉ LAZO
28. TIEMPOS DE CORTE MÁXIMOS DE
DIFERENCIALES
Tema 1.0. Instalación de Puesta a Tierra y protección frente a contactos directos
e indirectos
28
ING. JOSUÉ LAZO