♥♥ راسلنا لوضع اعلانك او من خلال شراء خدماتنا من خمسات وستحصل على مميزات اعلانية خيالية ♥♥
♥♥ ادعوا اصدقائك للاشتراك معنا لتصل جميع اعلانات التوظيف واخر الاخبار والمواضيع الى بريدكم الالكترونى مباشرة ♥♥
♥♥ ضع إعلانك معنا مجانا * وبدون تسجيل * ( نحقق لك الاشهار والانتشار وزيادة الاعضاء والزوار لدينا باك لينك عالي وارشفة عالية ومشاركات عبر التواصل الاجتماعي ) ♥♥
♥♥ ( لمتابعة آخر الاعلانات والوظائف والمواضيع والاخبار أولا بأول يرجى مراجعة موقعنا من كل حين لآخر حيث يتم النشر وبشكل مستمر لكافة المواضيع المتنوعة والهامة ) ♥♥
* منتديات هندسة بلا حدود * يتم تفعيل الحساب خلال 24 ساعة من قبل ادارة المنتدى او من خلال ايميل تسجيل العضو مباشرة *
PCC/MCC panels are made up of 14/16 SWG CRCA material semi bolted structure firmly supported. Ensures desired breaking capacities, temperature rise & IP protection. Enough Space for incoming & outgoing Cable termination. Outgoing terminals are stud type as standard practice. All starters are Type Two Co-ordinated. CT terminals, Cable Alley Illumination Lamp, Space Heaters with Thermostats are standard features of our Panel boards.
MCC/PCC/ DB Specification : CONSTRUCTIONAL FEATURES : The Design of the PCC/MCC panel is robust and rigidly constructed to suit a wide range of industries and buildings. The supporting structures which form the framework are made up from 2.0 mm thickness steel sections, fully pressed and punched by CNC machines.
The door covers, partitions and panel parts are fabricated with CNC machines for high precision and accuracy. Base degree of protection is IP42. Higher degree of protection like IP54 or more can be manufactured on request. Samcon switchboards can be supplied both with top and or bottom entry.
FINISHES : Samcon pays great attention to the standard of workmanship and finishes. To ensure high quality finishing, all metal parts undergo thorough chemical treatment for anti-rust and epoxy powder adhesion. As standard, epoxy powder coating of 70 micron is applied evenly on all metal surface and oven baked at an average temperature of 150°C.
BUSBARS : Non-insulated or insulated high conductivity copper/Aluminum busbars with neutral are housed at the top section of the cubicle. The main busbars are mounted and supported on SMC busbar supports. The busbar chamber is housed in a separate compartment on top of the cubicle with facilities for segregation. Maximum temperature rise is less than 70°C on an ambient of 40°C.
INTERNAL SEPARATIONS OF ASSEMBLIES (FORM 1, 2, 3 AND 4) : Samcon switchboard can be provided with partitions for protected spaces according to Form 1 to Form 4. The form of separation according to the latest IEC60439-1:1999 offers an internal protection of minimum IP2X or more.
WIRING : The entire wiring is done with high grade bright copper annealed standard PVC or FRLS or HR FR insulated flexible wires. Control wiring is carried with minimum 1.5 sqmm Gray wire & CT wiring is done with 2.5 sqmm Gray wires. DC wiring is done with 2.5 / 1.5 sqmm white wire. All doors are earthed with the help of 1.5 sqmm yellow green wire.. Electronic Card signal wiring is done with 1 sqmm Shielded wire.
Cable Chamber : Cable Chamber of adequate size is provided on the side of Each Vertical with sufficient no of Cable Tie bars. Each Terminal block is provided with the identification markers & feeder designation sticker. Control & Power TB’s are separated from each other. Each Cable Chamber is provided with panel illumination CFL lamp with door switch & heater & Thermostats are provided optionally.
Component Identification : All the base plates are neatly mounted with necessary electrical components to ease the wire routings & wherever necessary PVC Trufs are provided. The component Identification stickers are provided both on the components & base plates.
Drawings : Following Drawings are provided to the customer before starting the manufacturing of PCC/MCC of the panel a) General Arrangement b) Single Line Diagram c) Bill Of Material d) General Notes e) Control Circuits After manufacture & testing of panel as built diagram are provided.
Test Following Tests can be witnessed by the customer a) Dimensional Check b) Bill of Material Verification c) Functional Checks d) Relay Function Test( On case to Case basis) e) Insulation resistance test f) High Voltage Test 2.5. KV for 1 minute
PCC/MCC as maintenance manual Pre-Energising Checks for PCC
Inspect busbar chamber, unit compartments and cable alleys. Remove tools, conductor strands and any other material lying loose.
Use vacuum cleaner to remove dust, small particles etc. Do not use air hoses which may contain oil, moisture.
Wipe the interior, particularly the insulation, using a clean cloth. Do not use cotton waste.
Check tightness of all electrical joints.
Plug all unused opening on outer surfaces.
Check alignment of operating handles for all switches and MCCBs. While despatching the switchboard, SECONDARIES OF CURRENT TRANSFORMERS ARE SHORTED. Remove these shortings while connecting relays/meters.
Close all doors before energising the board. Do not operate any equipment with its compartment door open when the PCC is energised.
Ensure that settings on protective devices are set for proper overload and short circuit co-ordination.
Check operation of ACB and associated control circuit in accordance with the relevant scheme drawing.
Measure insulation resistance of the system for any short or ground connection, using a 500V DC meggar.
During the monsoon, the switchboard may show lower meggar values. If insulation level is lower than 1 Mohm, switch on the space heaters and check meggar value after some heating.
If meggar value is satisfactory, the HV test need not be carried out. (Repeated insulation properties. All individual components as well as switchboard assemblies undergo HV test in the Factory). However, if HV test is deemed necessary, it should be conducted as per relevant Indian Standard
Ensure proper earthing connection. Ensure that all other ACBs/switches are off before switching on the Incomer.
In PCC busbars are located at the top and cable entry is possible from the bottom. To facilitate punching cutouts for glands, bottom plates are provided in two segments. While routing the cables in the cable alley, adequate bending radii (R >=12 x overall diameter of cables) should be considered. This will prevent cables from exerting pressure on the termination. ensure proper clamping of cables on the glands and cable clamps to avoid weight of cables acting directly on the termination. Block all unused holes.Replace all shrouds, if they are removed for cable termination.
Take following steps for cable termination :
Remove insulation from cable end without damaging conductor strands. Cut the ends clean and square.
Clean the conductor and coat immediately with inhibiting compound.
In case sector shape conductors are used, from the conductor using a circular forming die. Forming should be done prior to cleaning and applying inhibiting compound.
Use lugs with serrated barrels for crimping aluminium conductors. Serration increases the pull strength after crimping. It also cuts through the oxide film, if any, formed on the conductor.
Coat the lug barrel with inhibiting compound from inside.
Use proper crimping dies, as recommended by the lug manufacturer. For aluminium conductors, use ring or hexagonal dies. Ensure that the die surfaces meet during crimping. Incomplete crimping will result in higher temperature rise at the joint.
In case of long barrel lugs, increase number of crimps i.e. crimp the lug at 2 to 2 places
For MCC -
In addition to precautions in PCC we have to take special care for MCC starter feeders
a) Check SLD & Control Circuit b) Check Interlocking connections c) Check Field Interlocks. Shorting links provided on these interlocks need to be removed & field wiring to be done. Before making field wiring please check all circuit operations in cold start method. Give supply through starters only after check megger values of motor winding.
General Recommendations :
i) Tools like screw drivers, fuse pulling handle, door opening key for cable alley ii) All reference drawings like General Arrangement Drawing, Scheme Drawing iii) Consumable spares like bulbs, fuses Do not use rewired HRC fuses. It may cause an explosion or are, leading to a fire.
Precautions before starting maintenance :
Switch off incoming power supply before removing top plates and side covers. Lock out incoming power supply. For safe operations, rack out the incomer ACB to isolated position and lock it.
Measure voltage on busbars to ensure that busbars are de-energised.
Switch off the control supply.Isolate remote control voltage souvrces. Short all CT secondaries. In case of shutdown on only one feeder, lock the upstream breaker in position.
For safety of personnel, while working on busbars, provide temporary earthing using a metallic chain/strip near the work place. Remove this earthing only after the job is completed.
SPECIFICATION :
IP - Code Of Protection
Degree of Protection for the Electrical Enclosures As per IEC 529 & BS 5490
First Numeral- Protection Against Solid Particles
IP
Test
Result
0
No protection
Object not protected
1
Protection against objects of size 50 mm in Dia or greater e.g Hand
Any Object having 50mm size should not enter
2
Protection against objects of size 12.5mm in Dia or greater e.g Fingers
Any Object having 12.50mm size should not enter
3
Protection against objects of size 2.5mm in Dia or greater e.g Tools
Any Object having 2.50mm size should not enter
4
Protection against objects of size 1mm in Dia or greater e.g Small Wire
Any Object having 1 mm size should not enter
5
Dust Protected
Harmful Dust Particles Protected
6
Dust Proof
Completely Protected Against Dust particles
IP - Code Of Protection
Degree of Protection for the Electrical Enclosures As per IEC 529 & BS 5490
Second Numeral- Protection Against Water
IP
Test
Result
0
No protection
Object not protected
1
Protection against water Droplets falling vertically( 0 )Deg
No Harmful Effect of Water
2
Protection against water Dropping at 15 Deg from both sides of vertical
No Harmful Effect of Water
3
Protection against Sprayed water upto 60 Deg from both sides of vertical
No Harmful Effect of Water
4
Protection against Splashing water From all sides of vertical
No Harmful Effect of Water
5
Protection against normal ( 1 Kg)water Jet From all sides of vertical
No Harmful Effect of Water
6
Protection against Power ful water Jet (4-5 Kg)From all sides of vertical
No Harmful Effect of Water
7
Protection against Temporary immersion in water upto 1 meter
يعتبر موقع منتديات هندسة بلا حدود من المنتديات المشهورة والمهمة ومن المواقع الهندسية العربية على الانترنت ،وحتى الآن عدد الأعضاء المنتسبين له في المنتديات كأكبر تجمع هندسي عربي حتى الآن.
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خدمات المحاسبة في الأردن
( Power Control Centre Panel ( PCC ) / Motor Controller Center Panel ( MCC
هام جداً: قوانين المساهمة في المواضيع. انقر هنا للمعاينة
احترم مواضيع الآخرين ليحترم الآخرون مواضيعك لا تحتكر ال موضوع لنفسك بإرسال عدة مساهماتمتتالية عند طرح موضوع يجب أن تتأكد أن عنوان الموضوع مناسب او لا تحل بحسن الخلق و بأدب الحوار و النقاش < لا تنس أن اختلاف الرأي لا يفسد للود قضية, فلاتتهجم على عضو بدعوى أنه لا يشاطرك الرأي < ان قطعت عهدآ مع عضو فأوفي بوعدك لأنه دين عليك إن حصل خلاف بينك و بين عضو حول مسألة ما فلا تناقشا المشكله على العام بل على الخاص ان احترمت هذه الشروط البسيطة, ضمنت حقوقك و عرفت واجباتك. و هذه افضل طريقة تضمن بها لنفسك ثم لمساهماتك و مواضيعك البقاء و لمنتداك الإزدهار في موقعنا إدارة موقع ومنتديات هندسة بلا حدود للاعلانات والسيو
البلد
الاوسمة الخاصة
الجنس : 
عدد المساهمات : 
الجمعة 23 سبتمبر 2016, 3:29 pm
هام جداً: قوانين المساهمة في المواضيع. انقر هنا للمعاينة 
