1. TESTING & COMMISSIONING
DET310
CHAPTER ONE
COMMISSIONING
MANAGEMENT

2. TESTING & COMMISSIONING
Introduction
The commissioning of electrical power systems may, in the first instance, be thought of a purely engineering activity, associated with understanding and proving the technical integrity, it is however, also a management process, requiring such qualities as; setting of objectives; planning; organising; documentation control; and, most important, the creation of team work.

3. 1.0 COMMISSIONING OBJECTIVES COMMISSIONING MANAGEMENT
The objectives of commissioning is to prove that
the individual items of equipment, which are
interconnected to form systems, circuits and
substations, are suitable for their intended purpose
and acceptable for commercial service.
COMMISSIONING MANAGEMENT

4. COMMISSIONING OBJECTIVES COMMISSIONING MANAGEMENT
This global objective can be subdivided into
Verifying that the equipment has not been damaged in transit, that it has been properly installed, and performs as specified
Obtaining test data as the basis for comparison with future maintenance and fault investigations results
COMMISSIONING MANAGEMENT

5. COMMISSIONING ACTIVITIES COMMISSIONING MANAGEMENT
Commissioning activities includes
Off load commissioning test
Objectives: To prove the integrity of the installed
equipment, hence its suitable for connection to the power
system, by observing its performance under test conditions
which, as far as practicable, simulate in service conditions
and requirements.
COMMISSIONING MANAGEMENT

6. COMMISSIONING ACTIVITIES COMMISSIONING MANAGEMENT
b) On-Load Commissioning Test
Tests which are carried out with the equipment
connected to the power system.
Objectives: This test utilized the power system itself to
demonstrate that the installation is technically
acceptable for commercial operation
COMMISSIONING MANAGEMENT

7. COMMISSIONING ACTIVITIES COMMISSIONING MANAGEMENT
c) Inspection:
-Pre-energisation Inpection: Process which are carried out
before the circuit being energised
Objectives: To ensure that all equipment are properly
connected and in proper condition before energisation
- Post Commissioning Inspection: Process which are
carried out after circuit/system has been energised
Objectives: To ensure and recheck that the equipments
have been left in the service condition
COMMISSIONING MANAGEMENT

8. 1.2 COMMISIONING PANEL
The commissioning panel is responsible for managing
the whole commissioning process. The commissioning
panel typically consists of the following representation:
Chairman, usually project manager
Technical engineer from the supply company capable of defining the required tests and accepting the test results.
Contractor representatives
supply company power system operations department (mainly concerned with the energisation process)
representatives of any companies whose equipment interfaces with that being commissioned.

9. 1.3 COMMISSIONING PROGRAM
The commissioning program is the key activity to be progressed by the commissioning panel. It should ideally cover the following stages:
Pre-commissioning inspection
2. Off load commissioning test program
3. Pre-energised inspection
4. Energisation and on load commissioning tests (usually covered by the switching program)
5. Post commissioning inspection

10. COMMISSIONING PROGRAM
ISSUE TENDER
DOCUMENT AND AWARD CONTRACT (ESC)
MANUFACTURE
EQUIPMENT
(CONTRACTOR)
PREPARE DESIGN
SPECIFICATIONS
(ESC)
OFF LOAD COMMISSIONING
TEST
(CONTRACTOR/
ESC)
PRE-COMMISIONING
INSPECTION
(CONTRACTOR/ESC)
ERECT EQUIPMENT ON SITE (CONTRACTOR/ESC)
POST COMMISSIONING
INSPECTION (CONTRACTOR/
ESC)
PRE-ENERGISATION
INSPECTION
(CONTRACTOR/
ESC)
ON-LOAD COMMISSIONING TEST
(CONTRACTOR/
ESC)
* ESC=electric Supply Company

11. COMMISSIONING MANAGEMENT
COMMISSIONING PROGRAMME
1.31 Pre-Commissioning Inspection
This would consists of an inspection of the installation to determined whether work is complete and satisfactory to the point where off-load commissioning test can commence
1.32 Off-load commissioning Test
A programme of test which include:
Test associated with AC circuit diagram
i) Test on current and voltage Transformer
ii) Primary Injections
Test associated with DC circuit diagram
i) Secondary injection on DC relays
ii) Circuit diagram logic tests
COMMISSIONING MANAGEMENT

12. COMMISSIONING MANAGEMENT
COMMISSIONING PROGRAMME
c) Equipment Secondary Injections
d) Power Supplies
i) 110V battery and distribution board
ii) 48 V battery and distribution board
iii) Diesel Generator
iv) low voltage AC supplies
e) High Voltage equipment test
i) Circuit Breaker
ii) Switches
iii) Disconnectors
iv) Earth Switches
v) Transfomers
COMMISSIONING MANAGEMENT

13. COMMISSIONING PROGRAMME COMMISSIONING MANAGEMENT
vi) Reactors
vii) Busbars
viii) Cables
f) Common Equipment
i) Busbar Protection
ii) Interlocking
iii) Synchronizing
iv) air system
v) Substation Control Systems
g) Earthing System
i) Substation earthing mat
ii) interconnection of earthing system
iii) Tower earthing
COMMISSIONING MANAGEMENT

14. COMMISSIONING PROGRAMME COMMISSIONING MANAGEMENT
h) High-voltage pressure Test
Auto-switching off-load simulation tests
End to end Test
i) Power Line Carier
ii) Intertripping
iii) Protection System
iv) Substation Control System
k) Insulation resistance Test associated with the above
COMMISSIONING MANAGEMENT

15. COMMISSIONING PROGRAMME COMMISSIONING MANAGEMENT
1.33 Pre-Energization Inspection
Pre-energisation inspection must be carried out prior to the circuit being energised
Example:
Confirmation of circuit nomenclature
Confirmation that equipment phase connections are in accordance
with the phasing diagram
Application of locks
Checking the correct position of all valves
Ensuring satisfactory indication of all pressure valves
Checking that all equipment is satisfactorily earthed
Ensuring the satisfactory conditioned of all battery supplies
Checking that all test connections have been removed
Confirmation of the tightness of all terminations
Confirmation that all current transformers are normal
COMMISSIONING MANAGEMENT

16. COMMISSIONING PROGRAMME COMMISSIONING MANAGEMENT
k) Confirmation that all current transformers links are normal
l) All realay settings have been applied correctly
m) Confirmation that all commissioning documentation is completed.
1.34 Switching Programme
This is a formal and precise worded procedure which specifies the
sequence of events required to energise the circuit and carry out
the on-load commissioning test. It needs to be circulated to all
parties concerned to ensure unanimityof agreement and
understanding. It should be provided and approved by the
commissioning panel.
COMMISSIONING MANAGEMENT

17. COMMISSIONING PROGRAMME COMMISSIONING MANAGEMENT
Post-Commissioning Inspection
The purpose of this inspection is to double check that the
commissioned equipment has been left in the in service position.
Example:
Ensuring that all temporary commissioning equipment has been removed.
Ensuring that all current transformers links are normal
Checking the correct position of all IN/OUT switches and transformers tap position
Ensuring that all relay settings are normal
General visual inspection
Ensuring that all commissioned equipment are clearly identify
COMMISSIONING MANAGEMENT

18. COMMISSIONING MANAGEMENT
DOCUMENTATION
An essential requirement of the commissioning process is the formal
documentation on both the management activities and the
commissioning test. Two type of documentation are
Commissioning report- The commissioning report is the formal record of the managerial process. It should consists of
A contents sheet, updated as the project progress
A copy of high level design specifications
Formal minutes of commissioning meetings
The programmed of work to be carried out, showing planned and actual completion dates
A schedule of commissioning test
A commissioning completion documentation, to certify that all work is completed.
COMMISSIONING MANAGEMENT

19. COMMISSIONING MANAGEMENT
DOCUMENTATION
b) Commissioning Log
Is the record of the technical process, comprising the complete
commissioning test schedule, test certificates, inspection report,
switching programme and other relevant technical document
COMMISSIONING MANAGEMENT

20. COMMISSIONING MANAGEMENT
COMMISSIONING CERTIFICATES
Acceptance Certificate
This certificate declares that
The equipment is ready to be connected to the power system
The equipment has been energised and subject to on-load
commissioning tests
Contract Taking Over certificate
When the work has been completed satisfactorily and the
equipment commissionied, a contract taking-over certificte or
similar documents will require completion.
This document notifies the contractor that the supply company
has accepted and that the warranty period has commence
COMMISSIONING MANAGEMENT