What does the service cover?
MV line design
Electrical and mechanical engineering of overhead and underground lines.
Short spans and shared supports
Dedicated design-basis, site-plan, duct, pole/crossarm, single-line and quantity items for these arrangements are retained.
Drawings, calculations and deliverables
Facility information form
Design basis including line purpose, name, conductor size, circuit count, length, ice-load zone, support/insulator types, connection and route rationale, and project-specific calculations.
Plan and profile
Plan and profile at horizontal 1/2000 and vertical 1/500 or 1/400 according to conductor type, marking angle points and terminal supports.
Route and site plans
A 1/25000 route plan with support and angle-point coordinates; supplementary 1/1000, 1/2000 or 1/5000 connection/site plans for lines under 1 km.
Cable laying drawings
Cable laying at 1/1000 or 1/2000 on planning, cadastral or surveyed bases, with duct type, cable characteristics, lengths and connection nodes.
Cable ducts and special crossings
Scaled duct and special crossing details based on cable characteristics, circuit count and cable arrangement.
Pole and crossarm selection schedule
Pole and crossarm types, chainages and spans, design ranges, angles, crossings, conductor/insulator arrangements and leg details.
Initial and final conductor sag
Initial and final sag, with maximum sag values at 5° temperature intervals across the critical range for the ice-load zone and conductor characteristics.
Principle single-line diagram
A principle single-line diagram showing all nodes and loads from the main supply substation to the connection point.
Voltage drop, power loss and thermal checks
Voltage drop, power loss and conductor thermal calculations considering every load between the supply substation and the connection point.
Insulator swing calculations
Weight-span and wind-span relationships for suspension supports, with calculation records for special support arrangements.
Short-circuit calculations
Equivalent impedance of circuit elements up to the calculation point and short-circuit calculations for underground cable lines.
Pole strength, swing and clearance checks
Force and strength checks for special supports or individually determined design ranges, conductor swing diagrams and overhead clearance calculations.
Special conductor electrical calculations
Resistance, magnetic flux, inductance and reactance where standard calculations do not cover the arrangement, supplying inputs for voltage drop and power loss calculations.
Bill of quantities
A bill of quantities covering materials, installation, removal and reinstallation items in the design.
Material schedule
Support types, quantities and weights; suspension/tension sets, insulators, conductor types/lengths/weights, surge arresters, marker balls and warning plates.
Short-span / shared-support line: Facility information form
Purpose, technical characteristics, connections, route information, design rationale and specific calculations for short-span or shared-support lines.
Short-span / shared-support line: Site plan
A 1/1000, 1/2000 or 1/5000 site plan showing connections; duct types, cable characteristics, lengths and nodes for cable sections.
Short-span / shared-support line: Cable ducts and special crossings
Duct and special crossing details based on circuit and laying arrangements for cable sections of short-span or shared-support lines.
Short-span / shared-support line: Pole and crossarm selection schedule
Pole/crossarm types, spans, design ranges, angles, crossings, conductor arrangements, insulators and leg details.
Short-span / shared-support line: Principle single-line diagram
A diagram of nodes and loads from the main supply substation to the line connection.
Short-span / shared-support line: Bill of quantities
Materials, installation, removal and reinstallation quantities for short-span and shared-support lines.
Technical support from data to implementation
Review design inputs
Review available design, connection, field or cadastral information against the scope.
Prepare the technical package
Coordinate the drawings, calculations and schedules for the service.
Institutional submission and technical follow-up
Submit the package to the relevant institution and follow its technical review.