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A - Material processing equipment
B - Equipment for the production, transport and distribution of concrete, mortar and rendering mixes
C - Lifting gear
D - Equipment for earthmoving and soil compaction
E - Road construction machinery
F - Railway track construction equipment
G - Floating equipment
H - Tunnel and mining construction equipment
J - Pile drivers and extractors, soil injection equipment
K - Drilling equipment, diaphragm wall equipment
L - Equipment for pipe jacking and pipeline construction
M - Equipment and plants for decontamination and environment protection
P - Transport vehicles
Q - Air compressors, pneumatic tools
R - Equipment for power generation, transformation and distribution
R.0 - Generating sets
R.1 - Transformers
R.1.0 - Threephase power transformers, oil-cooled
R.1.1 - Threephase power transformers, dry-type, resin-insulated type
R.1.2 - Isolating transformers
R.1.20 - Three-phase AC isolating transformer
R.1.21 - AC isolating transformer
R.1.22 - Isolating transformer for extra-low voltage
R.1.3 - Miscellaneous transformers
R.1.4 - Miscellaneous equipment for transformers
R.1.5 - Mobile transformer stations
R.2 - Power distribution boxes for construction sites
R.3 - Switching equipment, frequency converters
R.4 - Electric motors
R.5 - Miscellaneous electrical equipment
R.6 -
R.7 - Steam generators, water heaters, driers
R.8 - Combustion engines
R.9 -
S - Hydraulic cylinders and hydraulic units
T - Centrifugal and piston pumps, pipelines
U - Formwork and scaffolds
W - Workshop machines and equipment
X - Construction site accomodations, containers
Y - Equipment for surveying, laboratory, office, communication and monitoring
register number R.1.22 Isolating transformer for extra-low voltage
data processing short term TRENNTRAFO KLEINSP
standard
equipment		 Input: 400 V or 230 V, 50/60 Hz, with 2 m connecting cable.
Output: 50 (42) V three-phase AC or 24 V AC or max. 50 V as isolating transformer.
Input voltage = output voltage.
Portable version, protective housing, insulated, type of protection IP44, with separate windings
register of construction equipment 1991 7604