Schedule 1 – Commissioning Test

The Owner’s representative, the Contractor’s representative will meet on Site to verify the satisfactory
Commissioning of the Component Parts and the Work by Performing the Commissioning Test. Note
the Owner reserves the option to include the Technical Adviser and the Works Director for the site
visit. Part of the Commissioning Tests may require the presence of live Grid and the proper
interconnection of the Facility. The tests required are:
Visual inspection:
i. Each component is free of visible damages that might affect the safety of the component and
of the personnel;
ii. Each component has been installed properly and according to manufacturer’s guidelines;
iii. The usage of materials and proper installations adequate with the environment in which the
component is installed;
iv. Each component is readily accessible for the operations set out by the O&M Agreement;
v. The electrical installation has been performed according to executive design and to the
Owner's Requirements for the Facility;
vi. The readiness of the installation and of the calibration of all protection and signalling
equipment;
vii. The availability of electrical drawings, safety manuals and usage hand books taking into
account that at the PAC Test the Contractor is not obliged to provide the full maintenance
manuals which are due prior to the issue of PAC certificate;
viii. The identification of fuses, breakers, circuits, etc.;
ix. The correct labelling of cables and boards;
x. The correct execution of the electrical connections;
xi. Each component has been installed according to the prescriptions imposed by the
manufacturer;
xii. The existence of the necessary protections against electrical shocks due to active parts
insulation damage; (indirect contact)
xiii. The existence of electrical testing and certificates confirming conformance with legislative
British standards and or DNO requirements
xiv. Site layout and construction compliance with local planning authority approval consent,
including any amendments
xv. The existence of factory tests, quality reports and certificates from manufacturer, where
applicable.
Visual checks are applicable on all the components associated with the Facility, including the MV
Grid Connection line and associated equipment (where applicable). The following parts as a minimum
shall be subject to visual inspection:
(a) Supporting framework
(b) Photovoltaic modules and DC installation
(c) Mains, pits, cabling, electrical boxes and protection devices
(d) Internal connections and interconnections with external installations
(e) Monitoring System (including the environmental sensors such as pyranometers or reference
cells, thermocouples, wind and humidity sensors and the communication datalogger)
 (f) Low voltage installation, including protection equipment and utility interconnection
equipment
(g) Medium voltage installation, including transformers, protection equipment and utility
interconnection equipment (including the associated housing structure) where applicable
(h) Inverters (including the associated housing structure, if any)
(i) Security fencing, gates and surveillance system
(j) Grid Connection line and associated systems within the defined site
(k) Equipment labelling (the as built drawings shall be in alignment with the constructed Scope
of Works)
(l) Health and safety signage

Note: All of the above items or equipment must be present at site prior to issue of Commissioning
irrespective of the value of such item.

Functional tests:
i. The electrical continuity and the connections between PV modules:
 PV string – open circuit voltage measurement
 PV string – current measurement
 PV array insulation test
 Continuity of protective earthing and/or equipotential bonding conductors
 Polarity test
ii. Inverter commissioning shall follow the manufacturer protocol described in the inverter
installation manual as a minimum to include: checking inverter cabling for conformity to
schematic diagrams, verifying cable connections are firm, checking DC voltage for polarity,
checking AC grid voltage;
iii. All inverters are installed and operating in accordance with manufacturer specifications and
are calibrated appropriately;
iv. Testing and certification of electrical installation and earthing systems to ensure conformity
with applicable local regulations and local Utility requirements.
v. Protection Schemes Testing according to appropriate British standard;
vi. The control and supervision system (where applicable);
vii. Transformer commissioning tests;
viii. Switchgear and other control apparatus shall be tested to ensure correct operation and that
they are properly mounted and connected;
ix. Testing of MV cables (where applicable) to ensure conformity with applicable legislation
x. The earthing of substations, dischargers and lightning rods;
xi. The insulation of electric circuits and earthing circuits & sign off by qualified and competent
contractor on duly stamped official regulatory forms
xii. The Interface Protection Connection Test will be witnessed by the Utility, the Owner and the
Contractor.
xiii. A loss of the mains test shall be performed
In order to pass the Commissioning Test, the Contractor shall:
- Conform to Commissioning requirements for PV plants as per IEC 62446
- Ensure that all works on the electrical installations are carried out by a qualified electrical
contractor as per the regional statutory qualifications schemes
- When applicable, perform those studies requested by the Utility in relation with the voltage
fluctuation and harmonic limits
And
- Provide to the Owner’s Representative the Commissioning Documentation detailed below as
a minimum:
i. Successful completion of the Interface Protection Connection Test including the
evidence of Utility signature of the relevant form specified in the regulatory
documentation.
ii. Completion of ground earth resistance tests;
iii. Completion of inverter, circuit breaker and transformer commissioning tests to be
certified in a format recognised by the Utility and dated on or before the date of
commissioning (i.e. relative to when the tests where completed)
iv. Protection Schemes Commissioning;
v. MV pressure tests (where applicable)
vi. Cable dielectric and continuity tests & sign off by qualified and competent
contractor;
vii. Evidence of physical Generation meter showing the export channel electricity
generation in kWh with a picture of the meter together with the stamped
confirmation of the date.
viii. Details of the manner in which the generating station was commissioned
including relevant Health and Safety documents
ix. An ‘as built’ site plan and SLD;
x. EPC commissioning letter in a form to be agreed with the Owner
xi. Half hourly data from Generation Meter
xii. Any other information or documentation requested by the Utility

All above documents to be dated and signed or co-signed by the Contractor.