BTEC International Level 3 Engineering

Unit 16: Three Phase Electrical Systems — assessment criteria

BTEC International Level 3 Unit 16 (Three Phase Electrical Systems) — 60 Guided Learning Hours.

Internal / Optional60 GLH14 criteria

Teaching this subject at Level 2?

Assessment criteria

Reproduced verbatim from the Pearson specification — the same grid the assignment brief carries. A unit grade is the highest band where all criteria in that band (and every band below it) are met.

Pass

7 criteria

A.P1Explain the construction and operation, including calculation, of a synchronous generator that is part of a national grid system.

A.P2Describe the electrical transmission and distribution networks that form part of a national grid system.

A.P3Explain the operation of at least three safety devices used as part of a national grid system.

B.P4Conduct experiments safely to determine the operation of balanced and unbalanced resistive and reactive loads in star and delta connected circuits.

B.P5Explain, using the experimental results and theoretical calculations, how balanced and unbalanced resistive and reactive loads in star and delta connected circuits operate.

C.P6Explain how the maximum electricity demand for a domestic customer is determined.

C.P7Calculate the cost of electricity for two given engineering companies

Merit

4 criteria

A.M1Analyse the generation, transmission and distribution system required to supply electricity as part of a national grid system.

B.M2Conduct experiments accurately to determine the operation of balanced and unbalanced resistive and reactive loads in star and delta connected circuits.

B.M3Analyse, comparing the results and calculations, how balanced and unbalanced resistive and reactive loads in star and delta connected circuits operate.

C.M4Compare at least two electricity tariffs and select the most cost-effective solution for two given engineering companies.

Distinction

3 criteria

A.D1Evaluate, using language that is technically correct and of a high standard, the safe supply of electricity by a national grid system.

B.D2Evaluate how three-phase power circuits operate, comparing the results from safely conducted experiments and theoretical calculations, suggesting improvements to the experimental procedures

C.D3Justify, using language that is technically correct and of a high standard, the choice of tariff and potential cost savings through power factor correction for a given engineering company through comparison of tariffs and costs for at least two engineering companies.

Command verbs in this unit

The verb decides the depth expected — that is what separates Pass from Merit and Distinction work on the same learning aim.

ExplainDescribeConductCalculateAnalyseCompareEvaluateJustify

Pearson's ladder runs Identify → Describe → Explain → Compare / Analyse → Evaluate / Justify / Assess. A Merit or Distinction criterion on the same aim always implies the Pass beneath it: an “evaluate” answer that never first “explains” fails, however polished it reads. Hover a verb for what it demands.

How checkb.tech checks this unit

Upload a learner's submission and checkb.tech reads it against exactly these criteria, reporting each one as met, partly met, or not met — with the evidence that informed the verdict cited, so every call is auditable.

The check runs against the official Pearson documents for this unit, and identical evidence always produces an identical result — the same script gets the same verdict every time.

It never awards a grade. You stay the assessor: confirm, dismiss, or act on every criterion before your assessment decision is final.

Verification & Quality Tools for Unit 16

Free Lead IV and assessor utilities configured for Pearson BTEC International specifications.

Authenticity CheckerAudit Unit 16 Evidence with Free Authenticity Checker

Screen submissions for generic AI filler, inspect slide presentations, and generate oral viva questions.

Lead IV UtilityCalculate IV Sample Size

Generate a JCQ-compliant square-root sampling plan with assessor risk tiers and P/M/D grade distribution.

Compliance CalculatorCheck Resubmission Window

Compute the exact 15th working day deadline excluding term holidays and audit Pearson conditions.

Recommended Guides & Articles

Evidence standards, internal verification protocols, and marking guidance for Unit 16.

7 min read · criteria markingBTEC Command Verbs Explained (Pass, Merit & Distinction)

The full BTEC command-verb ladder from identify to evaluate, what each verb demands in evidence, and how verbs decide the Pass, Merit or Distinction band.

6 min read · internal verificationBTEC Resubmission Rules: One Opportunity, Done Right

When a BTEC resubmission is allowed: the one-opportunity rule, Lead IV authorisation, the short window, and what a compliant resubmission looks like.

7 min read · criteria markingPass, Merit & Distinction in BTEC: How Grading Really Works

How BTEC unit grades are decided: hierarchical P/M/D criteria, the all-or-nothing band rule, and why one missing Pass criterion caps a whole unit.

More Level 3 Engineering units

Unit 13 — Operation and Maintenance of Mechanical Systems Unit 14 — Fabrication Techniques Unit 15 — Electrical Machines Unit 17 — Power and Energy Electronics Unit 18 — Electrical Power Transmission and Distribution All units →

Criteria and aim text reproduced for teacher reference from the official Pearson qualification documentation (Pearson BTEC International Level 3 Qualifications). BTEC is a registered trademark of Pearson Education Limited. checkb.tech is an independent tool — not affiliated with, endorsed by, or sponsored by Pearson. It never awards a grade; the teacher stays the assessor.