JC-002

Title Page

Name Of Site
Image of Site Location
Date Of Maintenance
Maintenance Done By
Gate Codes
Alarm Codes
Site Contact/Access Details
Check HV Log Book Present? Please Sign In

DNO Details

Local DNO
DNO Substation Name/Number
Take Photo of DNO ID Plate

HV Substation

Substation Name
Damage - Check building interior and exterior for damage
Check Doors For Damage
Locking - Ensure Substation is Adequately and Securely Lockable With Restricted Access to Unauthorised Personnel
Check Windows For Damage
Check Guttering For Damage
Check Roof For Damage
Check Building Free From Corrosion
Check No Water Ingress Present (Including Basement)
Check Sockets and Lights (Including Emergency Lights) operational
Check Heater Operational and set to approx 10 Degrees
Check for signs of Asbestos Damage (including asbestos cable wrap)
Signage/ESQCR - Check the substation signage conforms to ESQCR Regulations
Check Signage For Site Name / Substation Name
Check Signage For Site Operator
Check Signage For Emergency Contact Number
Check Danger Notices Fitted To Substation Doors
(If Applicable) Check SF6 Warning Labels Fitted To Substation Doors
(If Applicable) Check for Asbestos Warning Labels
First Aid Kit
Check For In Date First Aid Kit
Check For In Date Eye Wash Kit
Check For In Date Defibrillator (If Applicable)
Check For Electric Shock Treatment Poster
Drawings/Documents - Check The Substation has adequate documents in place
Check For SLD - Is it Current and Accurate?
Check For Protection Study Documents
Check For Earthing Study Documents
Check For O&M Documents
E-STOP - Confirm Site Has Means Of Electrical Cut-Off
Co-Ordinate With SAP/DNO, ask for E-Stop to Be Tested
Confirm E-Stop Operates as Expected
Basement/Cable Trenches - Open The Access Point To Cable Trench or Basement. Check For:
Check For Water Ingress (Identify Source If Possible)
Check For Rodent Activity
Check For Sealed Cable Ducts
Cables - Check Cables Located In Basement For:
Check For Physical Damage To Exterior Of Cables
Check For Cable Routing Issues
Check For Cable Containment Damage
Check Bending Radius/Additional Stress on Cable Terminations
Check For Signs of Asbestos cable wrap, Ensure Painted and Free From Damage
Earthing - Check The Buildings Earthing System and Confirm:
Check Metal Equipment Is Bonded
The Main Earth Bar has the correct dimension
Check Earth Cables Are Free From Damage
Check Earth Cables are of Sufficient Size
Check Earth Connections are not "Doubled Up" of have additional washers between the lug and main earth bar
Check The Number Of Connections is expected for the size of the site
Fall Of Potential test for the entire Earthing System
Outdoor Enclosures (Such as Outdoor TX Pen, Outdoor Substation)
Damage - Check External Enclosure Exterior Fencing For Damage To:
Check Damage To Gates
Check Damage To Fence Panels/Mesh Fence
Locking - Ensure Enclosure is Adequately and Securely Lockable With Restricted Access to Unauthorised Personnel
Signage/ESQCR - Check The Enclosure Signage Conforms To ESQCR Regulations:
Check Signage For Site Name / Substation Name
Check Signage For Site Operator
Check Signage For Emergency Contact Number
Check Danger Notices Fitted To Substation Doors
(If Applicable) Check SF6 Warning Labels Fitted To Substation Doors
Access - Check That Access To The Enclosure Is Restricted By Either:
Check Controlled Keys In Place For Access
Check Interlocks With Isolated Equipment
Earthing - Check The Enclosure's Earthing System and Confirm
Check The Metal Equipment and Fencing Is Bonded
Check The Main Earth Bar has the Correct Dimension
Check The Earth Cables Are Free from Damage
Check the Earth Cables are not "doubled up" of have additional washers between the lug and main earth bar
Check the Number of Connections is as Expected for the Size of the Site
Weeds/Vegetation - Check Within Enclosure for Weeds/Vegetation growth:
Confirm the compound floor is free of weeds or is not "waterlogged"
Confirm the frequency of weed treatment
Cable Ducts - Are the Cable Ducts Sealed?
LV Equipment
Damage - Check LV Equipment Is Free From External Damage
Labelling - Check each piece of LV equipment is correctly labelled
Where possible check the LV Equipment Is Locked
Functions - Function check the LV Equipment
Battery Charging Unit
Serial Numbers - Confirm The Serial Numbers are Correct to the Database / Record Number
Label - Confirm All Labels Are In Place - Danger Notices and Data Plates
Exterior - -Check The External Condition of the Battery Charging Unit For Rust and Deformation
Indication - Confirm The Indication Works and Confirms The Status Of The Charger Unit
Type - Confirm The Manufacturer And Type Of Batteries Used - Photos of Data Plates
Replacement - Check For Records For The Battery Last Replacement Date
Damage - Check Each Cell For External Damage And Leaks
Connections - Check The Tightness Of The Battery Charger Cable Connections - AC/DC/Battery Terminals
Measure and Record The Overall and Individual Cell Voltage
Total Voltage
Voltage OK?
Battery Voltage
Voltage OK?
Confirm The Measured and Battery Charger Voltmeter Are The Same
HV Switchgear
Confirm Switchgear Make, Model and Serial Numbers
Panel Name
Switchgear Manufacturer
Switchgear Model (s)
Switchgear Rated Voltage
Switchgear Serial Number (s)

General Switchgear Information

Confirm Panel Identifications/Operational Labels are Present, Correct and are Correct To The SLD
Confirm The Following Labels Are In Place On The Switchgear:
Danger Notices
SF6 Warning Labels (If Applicable)
Switchgear Data Plates
Operational Locks - Check operational locks are in use and are fixed at the correct locations
SF6 Levels - Check The SF6 Level Indicator (Mechanical Gauge or Pressure LED) this should indicate there is a safe pressure of SF6 Within the unit.
Where there is a different arc quenching medium in place (e.g Oil / Vacuum) check that presence and safe level
Protection - Check Protection relays are free from trips and alarms
Distress/Damage - Check The External Structure of the Switchgear; it should be free from distress and damage
External Panels/Covers - Check Condition Of:
Signs Of Corrosion and Paint Condition
Ensure All Covers are Fitted Securely and in the Correct Position
Confirm Covers are Secured from Accidental Access (Require a Key Or Tool)
Switchgear Tools - Check Operation Tools are resent and serviceable (anti-reflex)
Condition Of Operating Handle
Condition Of Earthing Handle
Condition Of Charging Handle
Remote Control of Switchgear - Check The Remote Operating Facility is Serviceable and Free From Damage
Pendant - Is it serviceable and free from damage
Remote Operating Panel - Is it serviceable and free from damage
Circuit Breaker
Carry Out Functional Checks In Accordance With Manufacturers Instructions
Does The Circuit Breaker have an Operation Counter?
Number Of Recorded Operations
Is this within the manufacturers limits?
Disconnectors
Carry Out Functional Checks In Accordance With Manufacturers Instructions
Switch Disconnectors
Carry Out Functional Checks In Accordance With Manufacturers Instructions
Earth Switches
Carry Out Functional Checks In Accordance With Manufacturers Instructions
Fuse Switches
Carry Out Function Checks In Accordance With Manufacturers Instructions
Visually Inspect The Fuses And Fuse Holders to Ensure Free From Damage
Confirm HV Fuses Are Correct Rating
Confirm HV Fuses have been Inserted the Correct Way Around
Confirm The Trip Function Works
Interlocking - Check All Interlocking Operates In Accordance With Manufacturers Instructions. It Should not be Possible to Apply and Earth To A Live Circuit
Cable Compartments - Remove The Covers And Check For Internal Damage
Ensure The Cable Compartment is free from Corrosion and Moisture
Check For Signs Of Rodent Activity
Check The Cable Containment Is Sound and Secure
Cables - Check The Exterior Of The Cables are Free From Damage or signs of Deformation
Cables - Confirm the cables are free from additional stress and have not exceeded the minimum bending radius
Cable Terminations
Confirm the Terminations are free from Stress and Damage
Remove the end cap and check the captive plug is free from signs of PD
Confirm the Terminations are Secure
Confirm the Cables are Identifiable (cable markers)
CTs and VTs
Confirm both CT and VT wiring is secure
Confirm the CTs are not Open Circuit
Check The Condition of the CTs and VTs, confirm free from signs of distress
Where Applicable, confirm the VT fuses are in good condition and free of signs of PD/Moisture Ingress
Take Photo Of CTs
Take Photo of VTs
Earthing
Confirm the cable compartment is adequately earthed
Confirm suitability and condition of Cable Earths
Confirm suitability and condition of Switchgear Body Earths
Confirm Suitability and Condition of Termination Earths
Mechanism Compartments
Check The Covers for Damage and Corrosion
Check the mimic matches the SLD and is Correct
Confirm the circuit indication is operating correctly and matches the status for the CB / Earth Switch / Disconnector
Confirm the mechanical parts are freely moveable, apply grease/lubrication in accordance with the manufacturers instructions
LV Compartment
Remove The Covers/Open Doors and Check For Internal Damage
Ensure The LV compartment is free from rust and moisture
Confirm there are no signs of rodent activity
Check the Cable Containment is Sound and Secure
Confirm the Relays and Meters are Secure
Carry out a 10% Check On Cables Ensuring they are Free from External damage/rubbing or hotsports
Confirm the Cables are Suitable Identifiable (cable markers)
Carry Out a 10% Check on the terminals ensuring they are secure and cables are fitted tightly
Confirm The LV Compartment is Adequately Earthed
Protection
Confirm All Protection Devices are Functional and Operating Satisfactorily
Test Control Schemes Including Premag Schemes For Correct Operation
Primary and Secondary Injection
HV Transformers
Transformer Name
Confirm Transformer Data Plate Present - Take Photo
Type Of Transformer
Transformer Size (KVA)
Voltage HV Side
Serial Number
Voltage LV Side
Confirm All Required Labels In Place
Confirm Adequate Danger Notices
Exterior Structure Of Transformer
Check the Transformer Paint Condition
Check The Transformer Exterior For Rust/Corrosion
Check The Exterior of the Transformer for Deformation
CAST RESIN - Clean cells thoroughly to remove dust and debris build up, and check surface for cracking
Oil Level - Confirm the Oil Level is above the Minimum Operating Level. This is usually identifiable via a spyglass or the protection device
Transformer Oil Leaks
Check Bushings For Signs Of Oil Leaks
Check All Gaskets For Signs Of Oil Leals
Check Bottom OF Radiators/Fins For Oil Leaks
Confirm Transformer Free Of Damage
If Leak Observed, if possible, stem the flow (tighten bolts)
Transformer Bund - Confirm Bund Present and Suitable
Confirm Bund Present and Suitable
Check Bund Is Free from Oil or Water
Confirm the Presence and Operation of the Bund Oil Pump
Earthing - Check The Suitability of the earths. Confirm they are secure and free from Rust
Locks - Check Operational Locks are in Use and in the Correct Places
Terminations - Confirm the Primary and Secondary Terminations are free from Damage and signs of PD or Distress
Remove Any Build Up of Dust and Debris from Bushings and Terminations
Cables - Confirm the Cables are Suitably Supported and Free From Unnecessary Stress or Signs of Damage
Bushings - Confirm the Bushings are free from Damage or signs of PD
Bushings - Check For Leaks and Tighten if Necessary In Accordance With Manufacturers Instructions
Cable Box - Check The Condition of the Cable Box; this should be free from excessive rust and damage
Clean the cable box as required
Covers - Check the Condition of the Cable Box Covers, Including Securing Bolts and Gaskets
Ducts - Confirm All Cable Ducts are Securely Sealed to Prevent Water and Rodent Ingress
Ventilation - Check Ventilation Is Adequate and Free From Obstructions, Clean as Necessary
Fans - Where Applicable, Functional Check Cooling Fan Controls and Operation
Breather - Confirm Breather Type
Does Silica Gel Require Replacing?
Replaced During Maintenance?
TX Protection
Max Temperature Recorded (C)
Alarm Temperature (C)
Trip Temperature (C)
Pressure Trip Setting (Bar)
Functional Trip Test of Transformer Protection
Oil Sampling Required
Completed Successfully?