stertil-KONI ST 1055, Installation, Operation & Service Manual, Page: 18 / 50

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5.2 CONNECTING LIFTING COLUMNS
A fully closed ring circuit consists of a minimum of two and a maximum of 32 lifting columns (single phase a min.
of 2 and a max. of 4 lifting columns).
A column circuit requires at least 1 (one) primary column. The position of a primary column in a circuit is
irrelevant, but preferably should be located near the power supply. If in a column circuit there is one primary
column, this circuit is called a "set".
A set can consist of 2, 3, 4, 5 or 6 etc. up to 32 lifting columns (single phase 2, 3 or max. 4 lifting columns).
A set has a maximum lifting capacity of 40,000/48,000/64,000 lbs (this is the maximum lifting capacity of a standard
set of 4 lifting columns of 10,000/12,000/16,000 lbs each). For higher lifting capacities, "sets" are to be combined in
a column circuit as specified in the table below (also see fig. 5.2).
3 Phase
Lifting capacity in lbs
Minimum
number of
primary
columns
Maximum
number of
secondary
columns
up to 40,000 up to 48,000 up to 64,000 1 5
40,000 to 80,000 48,000 to 96,000 64,000 to 128,000 2 (2 sets required) 10
80,000 to 120,000 96,000 to 144,000 128,000 to 192,000 3 (3 sets required) 15
120,000 to 160,000 144,000 to 192,000 192,000 to 256,000 4 (4 sets required) 20
etc. etc. etc. etc. etc.
1 Phase
Lifting capacity in lbs
ST 1055 ST 1060 ST 1072
Minimum number
of primary
columns Maximum
number of
secondary
columns
up to 40,000 lbs up to 48,000 lbs up to 64,000 lbs 2 2
Primary columns are arranged in a circuit so that the weight of the load of the "set" (primary column followed by the
secondary columns up to the next primary column) does not exceed 40,000/48,000/64,000 lbs. To increase the
flexibility of a system, it is possible to select a primary column as a secondary column.
To ensure safety, each primary column is provided with a thermal relay preventing a set from being overloaded and
protecting the lifting system against power overloads.