Electrical Design & Drawing for EHV, HV, MV System

Product Details:

PLCC (Power Line Carrier Communication) block diagram mainly shows the connectivity of telecommunication, tele-protection and tele-monitoring between electrical substations through power lines (Shield wire or OPGW) at high voltages, such as 110 kV, 220 kV, 400 kV in a schematic manner. Different types of power-line communications use different frequency bands. Use of PLCC in modern electrical power system is mainly for telemetry and telecontrol. Telemetry refers to science of measurement from remote location. Different types of data transmission system can be used depending upon the network requirement and conditions. For large power system power line carrier communication is used for data transmission as well as protection of transmission lines.

We are preparing similar block diagrams in all substation projects where PLCC is envisaged and thus have created long experience in helping our Clients to implement PLCC system.

Additional Information:

• Item Code: S-052
• Production Capacity: 2 nos. per week
• Delivery Time: 3 days
• Packaging Details: Design submission by email.

Product Details:

Features :

We are providing the following Design Engineering services for 400kV Switchyard Projects :

• Site visit, data collection
• Design basis report
• Topographical contour survey, Survey drawings, Topographical contour layout
• Geotechnical investigation
• Soil resistivity measurement
• Electrical SLD, protections & metering SLD, controls and indications
• Overall site layout plan / Land utilisation plan
• Switchyard layout plan & elevation 
• Indoor and outdoor Cable trench layout
• Earthing calculation, layout and earthing details
• DSLP calculation and layout
• Control schematics and terminal plans of bay marshalling kiosks, Terminal plan of CT / PT JBs
• Cable schedule and interconnection diagram for Power and control cables
• Technical specification of all equipment and materials
• Lighting calculations, SLD, layout and BOM
• Bill of materials for cables, cable trays, racks, earthing, lightning protection and lighting systems
• Short circuit force calculation for strung bus and rigid tubular bus
• Sag and tension calculation 
• Fault level calculation by ETAP
• CT & VT sizing calculations
• Battery and battery charger sizing calculations
• Vendor drawing review
• Civil drawings and calculations for foundations, cable trenches, culverts, drains, control bldg., DG room, Store shed, Security room, Switchyard panel room (AC Kiosk), pump house, fire water reservoir, boundary wall
• GS structure drawings (lattice/pipe type) for gantry towers, beams and equipment supports
• SCADA architecture diagram, Input-Output list, BOM of SCADA system
• PLCC architecture diagram, BOM of PLCC system
• Schematic diagrams, specifications and BOM for Fire detection and alarm system
• Design calculations and drawings for air conditioning and ventilation systems

Additional Information:

• Item Code: S-025
• Production Capacity: 1 package in 2 months
• Delivery Time: 60 days
• Packaging Details: Drawings submission by email.

Product Details:

The "Indoor Cable Trench Layout" drawing is the one of the most important drawing of the EHV Substation buildings. This drawing shows the route of the Power & Control cables getting terminated at the Switchgear, Control & Relay panels, etc. from outdoor Switchyard or from the Dead End Tower of a Transmission Line within the Switchgear or Control building.

In the trench, the cables will be laid on GS Cable Trays. The indoor Power & Control cable length estimation is done on the basis of this layout.

Additional Information:

• Item Code: S-047
• Production Capacity: 3 nos. per week
• Delivery Time: 3 days
• Packaging Details: Drawing submission by email.

Product Details:

The "Lighting Layout" drawing is the one of the most important drawing of the EHV Substations. This drawing shows the total outdoor & indoor lighting and small power arrangement of the Substation.

Relevent softwares (Dialux, Photolux, Calculux, etc.) are used to do the calculations of indoor & outdoor lighting distributions.

Additional Information:

• Item Code: S-049
• Production Capacity: 1 no. per week
• Delivery Time: 5 days
• Packaging Details: Design & drawing submission by email.

Product Details:

SCADA (Supervisory Control Data Aquisition System) block diagram shows connectivity of various intelligent electronic devices (IED) and microprocessor based devices in a substation to the server or RTU in a schematic manner. The data collected by the IEDs are transferred to the server through fiber optic cables for centralised control or for further transmission to remote load despatch center (LDC) over FO medium or by PLCC.

We are preparing similar block diagrams in all EHV substation projects where centralised substation control through HMI is envisaged and thus have created long experince in helping our Clients to implement digital control of substations either locally or from LDC.

Additional Information:

• Item Code: S-051
• Production Capacity: 2 nos. per week
• Delivery Time: 3 days
• Packaging Details: Design submission by email.

Product Details:

Features :

Electrical design calculations are essential to determine sizes, quantity and rating of various electrical equipment. Our engineers are highly experienced in carrying out the following type of design calculations :

1. Earthing step touch potential, GPR calculation as per IEEE 80.
2. Earthing conductor sizing calculation as per IEEE 80.
3. Lightning protection calculation as per IEC 62305.
4. Battery sizing calculation as per IEEE 485.
5. Battery charger sizing calculation.
6. Indoor lighting calculations by Dialux software.
7. Outdoor lighting calculations by Dialux software.
8. Power cable sizing calculation.
9. ACSR conductor and AL Tube sizing calculation.
10. Short circuit force calculation in strung bus and rigid bus as per IEC 60865.
11. Sag tension calculation in strung ACSR conductor by PLS CADD software.
12. Transformer sizing calculation by ETAP software.
13. LV AC and DC breaker sizing calculation.
14. Load flow study by ETAP software.
15. Short circuit and earth fault current calculation by ETAP software.
16. Motor starting study by ETAP software.
17. DG set sizing calculation.
18. Protection coordination study by ETAP software.
19. Relay setting calculation by Excel or ETAP software.
20. Instrument Transformer sizing calculation.

Additional Information:

• Item Code: S-050
• Production Capacity: 2 nos. per week
• Delivery Time: 3 days
• Packaging Details: Design submission by email.

Product Details:

Features :

Earthing of non current carrying metallic parts of all electrical equipment and building steel structures are required to avoid shock hazards and to provide a return path for flow of earth fault current for operation of earth fault relay. Generally an earth bus is run along the cable tray runs and a ring is formed in all floors of industrial plant / substation / control room buildings. The earthing leads of all electrical equipment are connected to this earth ring at two places. In EHV Switchyards an underground earth mat is installed to avoid shock hazards from dangerous step and touch potentials. For GIS Substations, earthing philosophy is different due to the very fast transient overvoltage phenomemnon in GIS equipment. We have carried out earthing layout drawings, calculations and earthing installation details for misc. industrial units and substations in India and abroad in the last two decades and hence gathered extensive experience for supply of these drawings and designs as per International standards.

Additional Information:

• Item Code: S-044
• Production Capacity: 3 drawings per week
• Delivery Time: 1 week
• Packaging Details: Drawings submission by email

Product Details:

Features :

This job requires high skill and experience. The circuit breakers in a substation requires control from both local and remote. There are various interlocks, which are to be fulfilled either by hardwired relay logic or by software programs in a Server before a CB can be closeed from remote position (Network control center or HMI). The control schematic drawings indicates various modes and the combination of interlocks under which the motor can be operated. The drawing also shows details of spare contacts, indications, alarms, status feedback and AC/DC auxiliary circuits.Protection schematics deals with the interlocking logic for tripping of an electrical circuit under abnormal conditions. The faulty part of the circuit must be segregated from the system by opening of the nearest circuit breaker. We have enough experience in these fields to deliver the

Following Drawings:

• Protection and Control schematics for 400kV CBs.
• Protection and Control schematics for 220kV CBs.
• Protection and Control schematics for 132kV CBs.
• Protection and Control schematics for 33kV CBs.
• Control schematics for DOL & star-delta starters of Motors.
• Protection and Control schematics for GIS circuit breakers.
• Protection schematic for Outdoor switch-yards.
• Protection schematic for Indoor substations.

Additional Information:

• Item Code: S-6
• Pay Mode Terms: T/T (Bank Transfer)
• Production Capacity: 20 sheets per week
• Delivery Time: As per requirement
• Packaging Details: Despatched by email.

Product Details:

Features :

Depending on the Isokeraunic level of one place, outdoor equipment in a plant are exposed to direct lightning strike. Hence there is a need to protect all outdoor equipment from the direct lightning strikes by providing lightning protective measures. These lightning protective measures can be of various types as per NFPA/IEC standards. We have long experience of successfully designing such systems in India and many other coutries to protect equipment and personnel from severe damage by lightning strikes.

Additional Information:

• Item Code: S-045
• Production Capacity: 3 drawings per week
• Delivery Time: 3 days
• Packaging Details: Drawing submission by email.

Product Details:

Features :

A ''single line diagram'' (SLD) is one of the most important drawing in a power transmission or distribution system. It shows the power flow in one line form. Three phases in AC system or two lines in DC system are represented by one line in SLD. In all our projects we are preparing such SLD. Over the years our engineers have gathered thorough experience in preparing SLDs for LV/MV/HV/EHV systems.

The SLD can be of two type - 1) Key SLD (does not show the CT and PT/CVT secondary circuits) and 2) Protection and metering SLD (shows details of protective relays and metering devices connected at the secondary sides of CT/PT/CVT).

Additional Information:

• Item Code: S-040
• Pay Mode Terms: T/T (Bank Transfer)
• Production Capacity: 4 drawings per week
• Delivery Time: 3 days
• Packaging Details: Drawing submission by email

Product Details:

Features :

Electrical layout plan and elevation shows location of different electrical equipment in switch yards and control buildings and also in plant electrical rooms. The drawing also shows clearances among various equipment, clearances with walls or building structures, clearances from mechanical equipment in the shop floor and maintenance areas for removal and overhauling of electrical equipment. Building dimensions (LxWxH) are decided on the basis of these drawings. Finalization of these drawings also allow designing of cable trenches, earthing systems, lighting and lightning protection layouts of the substation and electrical buildings. We can offer following type of electrical layout work.


Layout Drawings:

• EHV air insulated switchyard layout plan and elevation.
• EHV gas insulated substation layout plan and elevation.
• Electrical layout plan and elevation of Switchyard control building.
• Electrical layout plan and elevation of Indoor substation buildings.
• Layout plan and elevation of LT switchgear rooms.
• Layout plan and elevation of LT MCC rooms in plant buildings
• SCADA room Layout
• PLCC room layout
• Battery room layout
• Plant PLC control room layout

Additional Information:

• Item Code: S-042
• Pay Mode Terms: T/T (Bank Transfer)
• Production Capacity: 1 no. per week
• Delivery Time: 5 days
• Packaging Details: Drawing submission by email.

Product Details:

Features :

In air insulated outdoor switchyard, an equipment is connected to conductors through connectors and conductor to conductor overhead connection are through clamps and tee connectors. Erection Key Diagram (EKD) is a drawing in which requirement of various kinds of connectors and clamps are identified and BOQ is formed for procurement. The BOQ also includes quantity of conductor, shield wire and Aluminium tube bus.

Additional Information:

• Item Code: S-043
• Production Capacity: 4 drawings per week
• Delivery Time: 15 days
• Packaging Details: Drawing submission by email

Product Details:

A 'Protection & Metering SLD' (P&M SLD) is one of the most important drawing in a power transmission or distribution system. It shows the total protection & metering of the power system in one line form. Three phases in AC system or two lines in DC system are represented by one line in SLD. In all our projects we are preparing such P&M SLD. Over the years our engineers have gathered thorough experience in preparing P&M SLDs for LV/MV/HV/EHV systems.

The Protection and metering SLD shows details of protective relays and metering devices connected at the secondary sides of CT/PT/CVT.

Additional Information:

• Item Code: S-041
• Production Capacity: 4 drawings per week
• Delivery Time: 3 days
• Packaging Details: Drawing submission by email.

Product Details:

Features :

Many power and control cables are laid in large industries to interconnect one electrical equipment with another for power distribution and for control, signalling, interlocking and tripping purposes. Cable schedule is a document in which all such cables are listed and their size, number of cores, originating point, destination, length, voltage grade are identified. We, for the last one decade, have supplied cable schedule and interconnection diagram for many projects and these projects have been commissioned as per these documents without much problem. The Interconnection diagram indicates terminal numbers at both ends of the cable to which the cores of one cable will get connected. Accuracy of these terminal numbers are to be indicated with great accuracy in order to have a smooth trial run and commissioning of the system. We are supplying these documents for

Following Applications:

• Outdoor substations.
• Indoor GIS substations.
• Indoor substations.
• Shop floors.
• Plant MCC rooms.
• Plant control room, pull pits.
• SCADA system.
• PLC, HMI, Control desk.

Additional Information:

• Item Code: S-048
• Production Capacity: 1 drawing per week
• Delivery Time: One week
• Packaging Details: Drawing submission by email.