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SIT Pits

The Series Isolation Transformer (SIT) pit used for airfield runway lighting comprises a polymer concrete pit and collar with a galvanised lid. A polymer concrete  stand is also available to support the series isolation transformer above the base of the pit.

Length: 650mm
Width: 550mm
Depth: 600mm or 890mm

Features and benefits

SIT Pit Features Diagram
125 tonne rated lid and collar
2Galvanised steel lid with lifting key hole
3Lid anchored to collar
Sit pit collar
Brass ID plate
Series Isolation Transformer stand
SIT support stand
SIT pit base
9Secondary cable conduit provision
10Primary cable conduit provision
11Drainage hole in pit base

SIT pits parts list

Lid and collar assembled
Descriptions/Dimensions (mm) Part No Overall Length
(mm)
Overall Width
(mm)
Depth
(mm)
Weight
(kg)
SIT Pit Lid and Collar Assembled 142322 650 550 160 95
Support stand
Descriptions/Dimensions (mm) Part No Overall Length
(mm)
Overall Width
(mm)
Depth
(mm)
Weight
(kg)
SIT Support Stand 142319 230 200 150 3.5
Pit base
Descriptions/Dimensions (mm) Part No Overall Length
(mm)
Overall Width
(mm)
Depth
(mm)
Weight
(kg)
SIT Pit Base – 450mm deep 142320 450 350 450 25
SIT Pit Base – 730mm deep 142321 500 400 730 50

PDF Spec Info SIT Pit Base - 450mm deep
PDF Spec Info SIT Pit Base - 750mm deep

Accessories
Descriptions/Dimensions (mm) Part No Overall Length
(mm)
Overall Width
(mm)
Depth
(mm)
Weight
(kg)
Universal Lifting Key 142320 - - - 0.6
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