Services

Five services, one coordinated package.

Take a single service, or the whole electrical design package. The value is usually in the coordination between them — which is why design management is treated as an engineering service rather than an administrative one.

Primary design

The physical substation: how the plant is arranged, connected, earthed, labelled and specified.

Substation layouts
Substation elevations
Earthing layouts, above and below ground
HV plant above-ground earthing design
Substation interlocking diagrams
Busbar & connector layouts
Busbar & connector schedules
Busbar force calculations
HV plant label design

HV plant label schedules
Control room layouts & elevations
Control room earthing layouts
Control room cable containment
HV plant equipment specifications
Materials lists & BOQs
Review of existing utility drawings
Site obstruction reviews

Protection & control

The secondary system: how the substation is protected, controlled, supplied and wired.

Single line diagrams
Protection block diagrams
LVAC single line diagrams
LVAC loading calculations
110V DC single line diagrams
110V DC loading calculations

Multicore, communications & control circuit diagrams
Wiring diagrams
Cable block diagrams
Cable schedules
Core sheets
Materials lists & BOQs

Cable design

Getting the circuit from A to B: routed, rated, and installable without damaging the cable.

Cable route layouts and sections
Cable thermal rating calculations
Cable thrust force calculations
Cable pulling calculations

Winch location design
Joint bay layouts
Joint bay earthing layouts
Cable materials lists & BOQs

Design management

A substation design goes wrong in the gaps between disciplines far more often than inside any one of them. Design management is how those gaps get closed.

Design coordination across primary, P&C and cable
Scope management and change control
Technical interface management
Design reviews

Engineering delivery management
Coordination with civil and structural partners
Designer duties under CDM 2015
Designer’s Risk Assessments

Tender & procurement support

A design has to survive being priced and built by somebody else. This is the documentation that goes out to the market, and the technical answers that come back.

Technical scope of works
Tender drawings & schedules
Equipment specifications for enquiry
Technical input to Employer’s Requirements
Bills of quantity for tender

Technical query responses during tender
Technical evaluation of tender returns
Review of supplier technical submissions
Contractor technical queries during construction
Derogation & departure reviews

Standards

Designed to the standards the asset will be adopted under.

Whoever adopts the asset governs the arrangement, the equipment and the documentation format. That gets established at the start rather than reworked at submission.

Substation design produced to the standards of, among others:

National Grid
Scottish & Southern Electricity Networks
Northern Powergrid

Electricity North West
Energy Networks Association

Scope

What sits outside this.

JB is a specialist substation design consultancy, not a one-stop-shop. Being clear about the edges is more useful to you than claiming to cover everything.

Civil and structural design — delivered through trusted partners where required
Earthing studies — soil resistivity, earth potential rise, step and touch — delivered through trusted partners and coordinated into the earthing layouts
Protection settings and grading studies — a separate specialism, worked to rather than produced
Construction, installation and commissioning works
Supply or procurement of plant and materials — the specification and the tender documentation are produced, the buying is not
Acting as the ICP or holding the connection agreement
General building services and M&E design