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30/11/2023
IEC 61000-5-2 يجب عدم تنفيذ شبكة أرضي منفصله للتيار الخفيف ولا شبكه منفصله للحمايه من الصواعق ، وتبقي هي شبكه واحده فقط...
27/11/2023

IEC 61000-5-2
يجب عدم تنفيذ شبكة أرضي منفصله للتيار الخفيف ولا شبكه منفصله للحمايه من الصواعق ، وتبقي هي شبكه واحده فقط

IEC
لما بيكشف عن مشكله بيقول حلها . . في نفس ال IEC الصفحه اللى بعدها علطول أعطي لنا Recommended configuration للشبكات الثلاثه مع بعض .. وهنلاقي انهم عباره عن شبكة أرضي واحده فقط .. و ده ظاهر في الصور المرفقة

لينك تحميل IEC 61000-5-2 :

https://drive.google.com/file/d/1kW4lJhqVgcEGfcLS7250M3ihlIhvjCk5/view?usp=sharing

Form of separation What is The formIEC 61439 'Low-voltage switchgear and control gear assemblies', specifies standard ar...
13/11/2023

Form of separation

What is The form
IEC 61439 'Low-voltage switchgear and control gear assemblies', specifies standard arrangements of switchboard (call forms of internal separation).
Types of form
The are labelled as Form 1, Form 2, Form 3 and Form 4. Forms 2, 3 and 4 are further broken down into Form 2a, 2b, 3a, 3b, 4a and 4b.
Each Form relates to the internal separation of the busbars, functional units and terminals, each being defined as:
1️⃣Busbar - low impedance conductor to which several electric circuits can be connected
o Main busbar - busbar to which one or more distribution busbar, incoming unit or outgoing unit can be connected
o Distribution busbar - busbar in one section which is connected to the main busbar from which incoming or outgoing units can be connected
2️⃣Functional Unit - part of the assembly comprising the electrical and mechanical elements that contribute to the fulfilment of the same function
o Incoming unit - functional unit which feeds energy into the assembly
o Outgoing unit - functional unit supplying energy to the outgoing circuits
3️⃣Terminals - part of the assembly which provide for connection of incoming and outgoing cable and busbar

at pic2(forms*)
B—BUSBAR
F---FUNCTIONAL UNIT
T---TERMINAL
S—SEPERATION

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