ABB BUF 3 User Manual

19
1ZSE 5492-128 en, Rev. 4
3 Repairs and adjustments
3. Repairs and adjustments
For Contact replacement see Maintenance Guide.
For Adjustment of Disc Brake see Maintenance Guide.
For Replacement of Gasket between on-load tap-changer tank and Transformer
tank see Installation and Commissioning Guide.
3.1 Replacement of gasket between insulating board and selector switch unit
3.1.1 General
This instruction guides you how to replace the gasket between the insulating board and the
selector switch moulding. The instruction can be used for both UZE and UZF on-load tap-
changers.
CAUTION
ABBrecommends that only maintenance engineers trained by ABB carry out replacement of
gasket between barrier board and selector switch unit.
3.1.2 Tools required
■ Pump with connection tting the oil valve
■ Box wrench (19 mm)
■ Electric drill, set of drills
■ Thread tap M16
■ Chisel (as used by a woodworker)
■ Dynamometric wrench (up to 42 Nm)
■ Tool with a prolonged shaft for square nuts (27 x 27 mm)
3.1.3 Material and spare parts required
■ Maintenance Guide
■ Clean and empty drums (for oil draining)
■ Rags (not cotton waste)
■ Rope (approximately 2 m)
■ Wooden wedges, made of birch wood or similar, rather hard wood (length approx.
100mm, width approximately 40 mm, and thickness approximately 20 mm)
■ Ethylacetate or similar solvent
■ Distance pieces of wood or pressboard (thickness of approximately 9 mm)
■ Single-phase diagram valid for the actual on-load tap-changer
■ Glue, nitrile rubber adhesive, preferably of type ”Pliobond 20” (Good Year)
■ Brush for application of adhesive
■ Gasket
■ Grease for ball-bearings
■ Brush for grease
■ Polyvinylacetate adhesive (normal glue for wood)
■ 18 stud bolts and 18 nuts
■ Tools and materials for draining transformer oil according to the transformer documen-
tation.

ABB BUF 3 Specifications

General

Brand	ABB
Model	BUF 3
Category	Industrial Equipment
Language	English