CATHDIC PROTECTION SYSTEM COMMISSIONING

 

INSTALLATION CHECKLIST FOR TRANSFORMER RECTIFIER STATIONS

Procedure Activity / Property Result / Check Unit
Check that the installation has been de-energised AC side
DC side
Make rectifier data sheet See Table A1-1
Check and compare rectifier unit with Drawings
Requisitions
Check protection type of the enclosure IP 20, door open
IP 54, door closed
Check exterior for Rust
Painting
Damage
Scratches
Dents
Broken parts
Check and compare against drawings Labels
Tagplates
External cable connections
Check fixing bolts for Tightness
Check for tightness by hand Wire connections
Check cable terminals Separated from other terminals
Check packing material Remove packing material
Check presence of Terminal partition
Warning plates
Cover plates
Check inside the cubicle Permanent electrode connections
Check rating and compare with drawings Fuses
Circuit breakers
Check information/instruction plates against drawings
Check the cubicle interior Clean, dry, free from dust and loose articles

INSTALLATION CHECKLIST FOR IMPRESSED CURRENT SURFACE GROUNDBED

Procedure Activity / Property Result / Check Unit
Check anode materials and dimensions, check for damage. Material: Silicon Iron / Magnetite /Graphite /MMO

Dimensions:

Weight:

Damage:

cm x cm
kg
Check anode backfill type, quality,
volume and weight.
Type: Coke breeze /other 
Fine/course/pre-packaged
Backfill, volume, weight
m3, tons
Check anode cable dimensions and check for damage of sheathing and anode connection. Measure cable resistance Size:
Length
Colour coding
Insulation / sheathing checked
Cable connection checked
Cable resistance    
mm²
mohm
Check the feeder system and splicing materials None/single anode
Central distribution, distribution box
Ring feeder, size
mm²
Check groundbed location
Excavate trench to required depth for horizontal installation
Auger or drill holes for vertical anode installation
Check soil resistivity
Location correct

Measure depth + length

Spacing anode holes
Depth holes
Resistivity at anode depth

m

m
m
ohm.cm

Horizontal:

 

Install anodes on layer of backfill and cover anodes.
Backfill acc. to specification.

 

Vertical:

 

Poor backfill material in hole (bottom) and centre anode in hole in tamped backfill.
Cover anode with backfill material.

Connections to feeder cable
connections to junction box
Line taps, C-crimps, other, Splice kits type
Commissioning
Measure anode groundbed resistance to remote earth. Anode groundbed resistance to remote earth ohm
Update as-built information Location, Station name
As built drawings
Finish trench with native soil Cable warning tape/tiles, groundbed markers

INSTALLATION CHECKLIST FOR IMPRESSED CURRENT DEEPWELL GROUNDBED

Procedure Activity / Property Result / Check Unit
Check anode materials and dimensions, check for damage. Use suitable centralisers and suspension ropes. Material:   Silicon Iron / Magnetite /
graphite / Pt-Ti / Pt-Nb /MMODimensions, Weight:

Damage:

Spacers, suspension rope

cm, kg
Check anode backfill type, quality, volume and weight. Type: Coke breeze /other / fine/course
backfill slurry / dry
Backfill, volume, weight
m3, tons
For each anode check cable dimensions and check for damage of sheathing and anode connection. Measure cable resistance Size, length
Colour coding
Insulation / sheathing checked
Cable connection checked
Cable resistance
mm², m

ohm

Check the feeder cable and splicing materials None
Single via junction box
Size
mm²
Check borehole details.
Check borehole location
Drill 5 m depth and set surface casing.
Drill hole to total depth and log hole using borehole checklist.
Check total depth and water level in hole
Drilling equipment suitable
Location correctSurface casing, dia, length
Hole diameter

Total depth
Water table

mm, m
mm

m
m

Set casing according to design,
record casing details,
cut casing above grade
Casing diameter / uncased
Active section: steel / perforated plastic,
isolating top section, steel (coated)/ plastic, length
mm

m
m

Install headworks with cable conduit,  anode suspension system, distribution box, vent pipe, shunts calibrated A/mV
Remove anode protection, lower anodes in centre of hole and fix suspension rope,
Install vent pipe with lower anode
Record installation details on “Anode log sheet”
Poor coke backfill (slurry) in hole. Record backfill used, record level of backfill. 
Backfill with gravel above active length.
Number of anodes per hole
Use centralizers and suspension ropeVent pipe material, diameter, length

Perforated over lengthCoke Used
Final level

Backfill gravel, particle size, max min
volume, weight

mm, m
m

tons
m

mm
m3, tons

Commissioning      
Measure each anode to remote earth resistance
Measure total groundbed to remote earth resistance
Anode resistance to remote earth

Groundbed resistance

ohmohm
Update as-built information Location, Station name

INSTALLATION CHECKLIST FOR UNDERGROUND SACRIFICIAL ANODES

Procedure Activity / Property Result / Check Unit
Check anode materials and dimensions, check for damage. Material: Magnesium / Zinc / Aluminium
Dimensions:
Weight:
Potential:
Damage:
cm
kg
mV  (ref)
Check anode backfill Type: Gypsum-Bentonite / other
Pre-packaged / separate:
Check anode cable dimensions and check for damage Size:
Length
Colour coding
Insulation / sheathing checked
Cable connection checked
Cable resistance    
mm²
mohm
Check the feeder cable and splicing materials None (one anode)
Single via junction box ring
Splice kits
 

 

Check installation details.
Take soil sample if required. 
Remove protection,install anode in centre of hole, water down and compact backfill.
Backfill with native soil.
Install cable.
Horizontal/vertical
Soil sample, Resistivity:
Depth bottom
Hole diameter
Spacing
Waterproof container removed.
depth top of anode
backfill watered down
loose backfill compacted
Cable depth
ohm.cm
m
mm
mm

m

Install distribution box No of anodes
No of feeders
shunts calibrated
Marker post
A/mV
Commissioning      
Measure anode free potential and resistance
Make connection to the structure, measure anode current, adjust resistor, measure structure potential
Anode-to-soil potential
Anode resistance to remote earth
Connection to structure made
resistors installed
anode current
structure-to-soil potential
mV (ref)
ohmohm
mA
mV  (ref)
Update as-built information Location
Station name/number

INSTALLATION CHECKLIST FOR SACRIFICIAL ANODES (MARINE, SUBSEA, INTERNAL)

Procedure Activity / Property Result / Check Unit
Check anode materials and dimensions, check for damage. Material: Magnesium / Zinc / Aluminium
Dimensions:
Weight:
Potential:
Damage:
kg
mV  (ref)
Check anode supports and support dimensions Distance to structure
Installation by bolts / U-bolts / welding
bolt holes matching
cm
Check coating if specified Coating bottom of anode
Check and mark anode locations Anode locations Marked
Install anodes in correct orientation, secure bolts.
tack weld bolted supports
coat supports/anode cores
Repair structure coating
Orientation vs. Structure (coating)
Bolts / U bolts secure
Welded / tack welded
Supports / cores coated
Structure coating repaired
 

 

Commissioning      
Measure anode-to-structure resistance (spot check).
Measure structure to soil potential (if possible)
Anode-to-structure resistance

structure-to-soil potential

ohm

mV  (ref)

Update as-built information Number of anodes, size, location
Drawings updated

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  1. March 25, 2020

    […] installation checklist for surface groundbeds (CATHDIC PROTECTION SYSTEM COMMISSIONING) should be […]

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