Electrical System Protection Grading Program

PROTECTION GRADING PROGRAM

The program below is the program that to determine the setting for the HT or LV electrical system from downstream onward. The program will automatically generate the graph of the setting that has been set or select for the design system.

HOW TO READ THE CALCULATION SHEET

1. The grading program starts first with the most downstream relay.


2. Column A - Protection relay name or number


3. Column D/E - CT Ratio


4. Column F - Maximum demand in amperes


5. Column H - Fault level in amperes


6. Column I - Highset current


7. Column J - Type of IDMT curve: NI = normal inverse, VI = very inverse, EI = extreme inverse


8. Column L - Plug setting in percentage of CT ratio


9. Column M - Plug setting in ampere Plug setting = maximum demand + spare


10. Column O - Calculated grading margin in seconds The margin shown is the margin between the corresponding relay with immediate downstream relay, ie the relay shown one row up.


11. Column P - Relay operating time in seconds


12. Column R - TMS setting in per unit


13. The full-load current stated for RT01 or RT03 is the actual MD required (without any spare).


14. The full-load current stated for the TNB relay is the preliminary MD applied.

Following the Codes for relay type used in this Program

CDG - manufactured by GEC Measurements, UK
MCGG - manufactured by Alstom, UK (for NI and VI curves)
KCGGEI -manufactured by Alstom, UK (for EI curve)
KCGG - manufactured by Alstom, UK (for NI and VI curves)
KCGGEI - manufactured by Alstom, UK (for EI curve)
2TJM - manufactured by NEI Reyrolle, UK (electro-mechanical type)
SPAJ - manufactured by ABB
DCD - manufactured by VA Tech Elin (Reyrolle), UK (numerical type)

The Result / Graph that generated by the Program

Recommendations

This program suitable for all engineer for their checking and designing. This Software has been used for my project such as Megasteel project at Olak Lempit, Banting. Cold Rolled Steel Factory. Refer to my Construction Site.

PLEASE DONATE OR BUY TO HAVE THIS CALCULATION HERE.
ONCE YOU DONATE OR BUY I WILL EMAIL TO YOUR MAIL ADDRESS.. PLEASE SENT YOUR EMAIL ADDRESS TO ME

ELECTRICAL SERVICES IN BUILDING CONSTRUCTION

ELECTRICAL SERVICES IN BUILDING CONSTRUCTION

SOFTWARE AVAILABLE :

ELECTRICAL INSTALLATION (LOW VOLTAGE) VOLTAGE DROP & CABLE SIZING CALCULATION

• The calculation was based on BS standard tabulation
  Automatic generated when input provided
  Microsoft Excel Format
  Password Protected
  The software will provide a result complete with cable sizing to suit.
  Applicable for Three (3) phase system 415V and 50Hz system
  Overview

CAPACITOR BANK CALCULATION

• Include the tabulation of the Breaker Size for your individual capacitor Bank
  Result will provide you the main breaker for the capacitor bank (inclusive of counter checking result)
  The software/tabulation provide the step that can be arrange to suit your system, from 6 steps to 12 steps
  Overview

EXTRA LOW VOLTAGE (ELV) INSTALLATION
MATV CALCULATION

• Applicable for Master AntennaTelevision Only
  Overview

SMATV CALCULATION

• Applicable for Master Antenna Television
  Applicable for ASTRO (Malaysia) or SAT signal
  Overview

Link to Other Calculation

1. Voltage Drop & Cable Sizing
2. Capacitor Bank Calculation 1
3. Capacitor Bank Calculation 2
4. Busduct Voltage Drop
5. Grading Protection Setting
6. Motor MCCB Selection Calculation
7. Street Lighting Voltage Drop
8. MATV Signal Strength Calculation
9. SAT Signal Strength Calculation

Usefull Program For Young Engineer

PROGRAM & SOFTWARE FOR YOUNG ENGINEER

DESIGN ENGINEER NEED TO LEARN MORE BEFORE HE/HER CAN START DESIGNING THE SYSTEM FOR THE PROJECT. SPECIALY PROJECT THAT INVOLVE CONSTRUCTION.

HIGH RISE BUILDING, BUNGALOW, FACTORY, SHOPPING COMPLEX EVEN TERRACE HOUSES.

THE PROGRAM THAT I WILL OFFER FOR FREE CAN USE AS A GUIDE TO COUNTER CHECK THE DESIGN THAT HAS BEEN DESIGN OR ALSO CAN BE USE TO START THE NEW DESIGN.

HOWEVER, THE CALCULATION / PROGRAM / SOFTWARE THAT I OFFER JUST A BASIC CALCULATION. EVENTHOU IT WAS BASIC BUT IT VERY USEFULL.

IN THIS BLOG ALSO IN MY OTHER BLOG WILL TEACH YOU HOW TO USE THE PROGRAM AND IT IS FRIENDLY USER. THERE ARE NOTE ALL OVER THE PLACE TO TEACH YOU HOW TO USED IT.