HV drafting service
Protection and control schematics
Protection and control information often arrives as markups, relay schedules, typical circuits and vendor documents. We turn those inputs into a coordinated schematic set while keeping unanswered design decisions explicit.
Illustrative example
What the reviewed deliverable contains
The rows below are synthetic. They show the structure of the output, not a client project.
| Item | Source | Review status |
|---|---|---|
| Trip circuit 1 | Logic L-04 | Drafted |
| Breaker close | Typical TC-02 | Interlock review |
| Relay alarm | I/O schedule | Terminal check |
Deliverables
What you receive
- Native DWG schematic sheets
- Wire and terminal numbering to supplied rules
- Cross-reference check
- Cable and schematic register inputs
- Revision notes
Inputs
What we need from you
- Approved protection philosophy or logic
- Relay and I/O schedules
- Typical circuits and vendor drawings
- Drawing standard and numbering rules
Checked by people
How the work moves from pack to issue
Confirm the circuit basis
We identify the approved typicals, relay I/O, device list and numbering rules.
Draft and cross-reference
Circuits are drafted and references are checked across the sheet set.
Review
A human drafter checks the set. The responsible registered engineer approves protection intent.
Scope boundary
What is not included
- Protection coordination study
- Relay settings
- Unapproved logic design
- Engineering certification
Project enquiry
Discuss protection and control schematics
Share the job type, bid stage, deliverables and closing date. A person reviews every enquiry.