Mini Substation Installation And Ring Main Unit Replacement Training

Learning Outcomes

• Apply relevant safety regulations and procedures when working on mini substations and ring main units.
• Analyze site conditions and electrical load requirements to determine appropriate mini substation specifications.
• Demonstrate correct installation techniques for mini substations, including earthing, cabling, and terminations.
• Perform safe isolation, removal, and replacement of ring main units following manufacturer guidelines.
• Test and commission installed equipment to verify functionality and compliance with standards.
• Evaluate potential hazards and implement risk mitigation measures during installation and replacement activities.

Target Audience

Electrical technicians, engineers, and maintenance personnel involved in the installation, maintenance, or replacement of mini substations and ring main units in industrial, commercial, or utility settings.

Prerequisites

None — open enrollment

Course Outline

Practicals

Overview

The practicals are essential for learners to gain hands-on experience in installing mini substations and replacing ring main units. Supervised practice ensures safe application of theoretical knowledge, including cable termination, testing, and fault finding. Learners will demonstrate competence in real-world scenarios under qualified instructor guidance.

Practical Activities

• Safe Isolation and Preparation — Learners practice isolating a live mini substation, applying lockout/tagout, and preparing the site for installation. (2h)
• Cable Termination and Earthing — Learners strip, terminate, and gland HV and LV cables, and install earthing conductors. (3h)
• Mini Substation Installation — Learners install a mini substation including enclosure positioning, switchgear mounting, and cable connections. (3h)
• Ring Main Unit Replacement — Learners replace an existing RMU with a new unit, ensuring correct phasing and operation. (2h)
• Fault Finding and Commissioning — Learners troubleshoot simulated faults and complete commissioning tests. (2h)

Summatives

Each delegate is assessed continuously throughout the course via daily exercises, scored practical assignments, and a final summative test at the end.

Practical Assignments — 30%

Practical assignments are observed and scored against a rubric during the practical sessions. Each delegate's practical mark is averaged into a single 100% score and contributes 30% to the final total.

Daily Exercises — 20%

Every training day ends with a multiple-choice exercise scored out of 100%. The scores from each daily exercise are averaged across the duration of the course to produce a Daily Average mark, which contributes 20% to the final total.

Final Test — 50%

On the last day a final summative test is written. It is a multiple-choice paper with multiple-answer questions: each question may have more than one correct option, and a single wrong selection on a question marks the entire question wrong — no partial credit. The final test is scored out of 100% and contributes 50% to the overall mark.

Final Total

Component	Out of	Weight
Practical Assignments (rubric-scored)	100%	30%
Daily Average (multiple choice)	100%	20%
Final Test (multi-answer multiple choice)	100%	50%
Final Total	—	100%

All marks are recorded on the AATICD LMS and visible to each learner under their account.

Certificate

How it works

• Certificates are auto-generated on the AATICD LMS as soon as the marks pass the 50% threshold.
• Each certificate is a branded PDF with the delegate's name, the course title, the unit standard ID, NQF level, credits, and the date of issue.
• You can download or print your certificate from your LMS dashboard at any time after issue — there's no reissue fee and no expiry date.
• If you scored under 50% you can sit the final test again at the next scheduled session at no extra cost.

Where to find it

Sign in to the LMS, open your dashboard, and your certificates appear under My Certificates. Each entry has a View / Download button and a print option.

Training Discounts

Group discounts apply automatically — the more delegates you enrol, the greater the saving. Discounts are calculated at 3% per 5 delegates, scaling up to 40% off for 100+ delegates.

Delegates	Discount
5	3% off
10	6% off
15	9% off
20	12% off
25	15% off
30	18% off
50	30% off
75	35% off
100	40% off

3% discount per 5 delegates, up to 40% off for 100+ delegates. Contact us for a custom group quote.