Distribution Sub-Station Inspection Form / Page 1 of 6
Date / Inspector / Network / Area
Inspection Type / Inspection Outcome
Project/Job Number
Project Supervisor / Connection Provider
Commissioning Engineer / Witnessed
Sub-Station Access / Compliant? / Compliant?
Unrestricted and secure access at all times / YES/NO/NA / Adequate personal & Plant access/egress / YES/NO/NA
Access finished and uncompromised / YES/NO/NA / Provision for Dual Locking / YES/NO/NA
Brick Built Sub-Station /
Compliant?
/ Compliant?Brickwork complete and satisfactory / YES/NO/NA / Roof ties secured / YES/NO/NA
Guttering complete with positive drainage / YES/NO/NA / Flame retardant ceiling / YES/NO/NA
Soffits, barge boards, vents painted or stained / YES/NO/NA / Ventilation - Louvres with vermin mesh / YES/NO/NA
GRP Sub-Station /
Compliant?
/ Compliant?GRP UK Power Networks spec / YES/NO/NA / Generator cable access flap / YES/NO/NA
GRP doors shut & close correctly / YES/NO/NA / Ventilation - Louvres with vermin mesh / YES/NO/NA
GRP enclosure fitted correctly & bolted down / YES/NO/NA
Integral Sub-Station /
Compliant?
/ Compliant?Service cable slots fire stopped / YES/NO/NA / Steel ducts through/under building / YES/NO/NA
Steelwork encased in concrete or durasteel / YES/NO/NA / No cable entry above wall mounted LV boards / YES/NO/NA
1.5mx1.5m clear area below ducts for scaffold / YES/NO/NA / Flame retardant ceiling / YES/NO/NA
Sub-Stations, all constructions /
Compliant?
/ Compliant?Plinth correct / YES/NO/NA / Cable trench sanded (100mm above ducts) / YES/NO/NA
Ducts sealed / YES/NO/NA / Cable trench grating (maxi 1m2 sections) / YES/NO/NA
Cable trenches (1000mm deep,600mm wide) / YES/NO/NA / SRS Laminated and Clearly Displayed / YES/NO/NA
Signage /
Compliant?
/ Compliant?Adequate safety signage to all approaches / YES/NO/NA / UKPower Networks Location / Ownership Label / YES/NO/NA
SF6 / No smoking label at entrance points / YES/NO / IDNO Identity/Ownership Label / YES/NO/NA
Sub-Station Doors / Compliant? / Compliant?
Door & frame UK Power Networks spec / YES/NO/NA / Door frame sealed with mastic / YES/NO/NA
Door & frame fitted and operates correctly / YES/NO/NA / Metal door frame earthed (minimum 16mm ) / YES/NO/NA
Door stays fitted / YES/NO/NA / Metal door earthed by braid to frame / YES/NO/NA
Door drop bolts fitted / YES/NO/NA
Power and Lighting / Compliant? / Compliant?
Lighting & power supply complete/tested / YES/NO/NA / Minimum twin 13A socket with RCD / YES/NO/NA
Consumer Unit 63A – 100A C/O / YES/NO/NA / Trunking / conduit - PVC / YES/NO/NA
Sufficient lighting / YES/NO/NA / RTU 5A Supply, Earthed RTU end ONLY / YES/NO/NA
HV Switchgear / Compliant? / Compliant?
Switchgear UK Power Networks /area spec approved / YES/NO/NA / EPI & RTU plugs fitted correctly (LPN) / YES/NO/NA
Operational clearances maintained / YES/NO/NA / HV End boxes fitted with arc vent to rear (Lucy) / YES/NO/NA
HV End boxes complete / YES/NO/NA / Neon test sockets (missing when PLTU fitted) / YES/NO/NA
Gas pressure / YES/NO/NA / PLTU checked & connected / YES/NO/NA
VIP/MICOM/ACB settings checked or / YES/NO/NA / Commissioning results left on site / YES/NO/NA
Correct Time Lag Fuses (ACB-15A) / YES/NO/NA / Emergency stop fitted with aux power source & flag relay (HV customer supply) / YES/NO/NA
HV Metering Unit / Compliant? / Compliant?
HV Metering unit UKPN approved / YES/NO/NA / HV Meters fitted / YES/NO/NA
Customer’s installation isolated, secure & ESQCR compliant. / YES/NO/NA / CT / VT test certs & commissioning sheets in Meter Cabinet / YES/NO/NA
CT / VT Ratios correct / YES/NO/NA
Power Transformers / Compliant? / Compliant?
TX UK Power Networks approved / size / YES/NO/NA / Stabilising feet fully supported / YES/NO/NA
Breather caps removed / YES/NO/NA / Access to oil drain cock / YES/NO/NA
Oil level correct / YES/NO/NA / Thermometer installed / YES/NO/NA
Tap-Changer operates / Locked Off / YES/NO/NA / Check if Dual ratio required / selected / YES/NO/NA
2 Maximum Transformers per Substation / YES/NO/NA
LV ACB / Compliant? / Compliant?
Rubber mat (LPN open type) / YES/NO/NA / Neutral connection is installed (LPN open type) / YES/NO/NA
Protection Settings checked & installed / YES/NO/NA / Switchgear UKPN approved / YES/NO/NA
Wall mounted earthed & securely fixed / YES/NO/NA / Metering C/T’s fitted where required / YES/NO/NA
Earth to LV Neutral Present (Customer) / YES/NO/NA
LV Cabinets / Compliant? / Compliant?
Metering C/T’s fitted where required / YES/NO/NA / Check number of ways in use, test all cables / YES/NO/NA
Shrouding complete (end caps) / YES/NO/NA / Vermin shroud installed / YES/NO/NA
LV terminations complete / YES/NO/NA / Correct MDI scale selected / YES/NO/NA
Cabinet securely fixed / YES/NO/NA / Switchgear (UK Power Networks) approved / YES/NO/NA
LV Distribution Board / Compliant? / Compliant?
Rubber mat (1m passed end of board) / YES/NO/NA / M1, M2 board inter-connected correctly / YES/NO/NA
Metering C/T’s fitted where required / YES/NO/NA / Tong testing possible / YES/NO/NA
Shrouding complete (end caps) / YES/NO/NA / Board earthed & securely fixed / YES/NO/NA
Hooks for board sheet / YES/NO/NA / Number of LV ways in use
Switchgear UK Power Networks approved / YES/NO/NA / Metering CTs correctly fixed / YES/NO/NA
Aux supply correctly taken from M1 board / YES/NO/NA / Correct MDI scale selected / YES/NO/NA
LV Cables Inside the Substation / Compliant? / Compliant?
LV cable correctly cleated / supported / YES/NO/NA / TX tails unarmoured cable only (LPN) / YES/NO/NA
LV connections correct, phased, testedand visuallysecure where visibly practicable / YES/NO/NA / No joints in substation / YES/NO/NA
Cable trays bonded / YES/NO/NA / Cables & joints installed in AIR – Fire Protection / YES/NO/NA
LV service cables construction correct (CNE) / YES/NO/NA
Earthing / Compliant? / Compliant?
Current carrying equipment (S/G, LV Fuse Cabs ACBs) bonded to TX or Earth Bar (120mm or 70mm Cu PVC) / YES/NO/NA / Two earth inspection pits (except GRPs) / YES/NO/NA
Ancillary Metalwork (Ducts, vents, doors, trays) min 16mm Cu PVC / YES/NO/NA / Earthing value verified / YES/NO/NA
HOT Site Earthing / Compliant? / Compliant?
HV / LV Earth 8m Separation / YES/NO/NA / Neutral/Earth link disconnected / YES/NO/NA
No metallic electrical fittings / YES/NO/NA / Disconnected sockets in LV Equipment / YES/NO/NA
RTU supplied from isolation transformer / YES/NO/NA / Site details supplied for HOT site register / YES/NO/NA
Cable Installation / Compliant? / Compliant?
Cable type correct, (UK Power Networks) spec / YES/NO/NA / Ducts colour / type correct / YES/NO/NA
Cable size correct / YES/NO/NA / Ducts size correct / YES/NO/NA
Cable depth correct ( LV 450,600 – HV 600,750 – EHV 900 - All Arable 1050, 1200 ) / YES/NO/NA / Ducts depth correct / YES/NO/NA
Cable separation correct / YES/NO/NA / Ducts sanded (110mm / 4.5” surround) / YES/NO/NA
Cable separation from other utilitiesin accordance with NJUG recommendations / YES/NO/NA / Ducts sealed on entry to building / YES/NO/NA
Cable free from damage / YES/NO/NA / Cables sealed inside ducts / YES/NO/NA
Cable bending radii correct / YES/NO/NA / Cable tray suitable / YES/NO/NA
Cable sanded/ fine fill (75mm / 3”) / YES/NO/NA / Cable tray earth bond / YES/NO/NA
Correct cable tile tape installed / YES/NO/NA / Cable cleated to cable tray / YES/NO/NA
Cable ends heat shrink capped / YES/NO/NA / Cable run clear of joints in buildings / YES/NO/NA
Cable route correct / YES/NO/NA / Fire stop slots / ducts into building / YES/NO/NA
Cable laying techniques correct / YES/NO/NA / Phase to Earth IR tests conducted / YES/NO/NA
Cable & joints installed in air – FIRE PROTECTION / YES/NO/NA / Cable screen to Earth IR tests conducted / YES/NO/NA
Amount of cable run Inspected / m / Against / m laid
UK Power NetworksAdopted Asset Details / Serial No. / Serial No.
RMU / EFPI
TRANSFORMER / PLTU
RTU / METERING UNIT
LV EQUIPMENT / RELAYS
CT’s / VT’s
Supporting Narrative
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Supporting Photographs
This Document Is Valid At 11/10/18
Check After This Date For Validity
HSS 02 004b Distribution Substation Inspection Form Version 2.0