SIEMENS
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Siemens IK PI · 2015
PROFIBUS
SIMOCODE 3UF Motor Management and Control Devices
3UF18 current transformers for overload protection
3
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Overview
The 3UF18 current transformers are protection transformers and
are used for actuating overload relays. Protection transformers
are designed to ensure proportional current transfer up to a
multiple of the primary rated current. The 3UF18 current trans-
formers convert the maximum current of the corresponding
operating range into the standard value of 1 A secondary.
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Selection and ordering data
1)
The following setting ranges for the protection of EEx e motors are
applicable:
3UF1843-1BA00, 0.25 ... 1.25 A;
3UF1843-2AA00, 1.25 ... 6.3 A;
3UF1843-2BA00, 2.5 ... 12.5 A.
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Accessories
Mounting type
Operating range
Screw terminals
A
Article No.
For stand-alone installation
3UF1843
Screw fixing and snap-on
mounting onto TH 35
standard mounting rail
according to IEC 60715
0.25 … 2.5
1)
3UF1843-1BA00
1.25 … 12.5
1)
3UF1843-2AA00
2.5 … 25
1)
3UF1843-2BA00
12.5 … 50
3UF1845-2CA00
16 … 65
3UF1847-2DA00
25 … 100
3UF1848-2EA00
For mounting onto contactors and stand-alone installation
3UF1868
Screw fixing
32 … 130
3UF1850-3AA00
50 … 200
3UF1852-3BA00
63 … 250
3UF1854-3CA00
100 … 400
3UF1856-3DA00
125 … 500
3UF1857-3EA00
160 … 630
3UF1868-3FA00
205 … 820
3UF1868-3GA00
For contactor type
Article No.
Terminal covers
3TX7466-0A
For transformer/contactor assemblies and stand-alone installation for transformer
(cover required per connection side)
3UF1845
3TX7446-0A
3UF1848
3TX7466-0A
3UF1850, 3UF1852
3TX7506-0A
3UF1854 to 3UF1857
3TX7536-0A
3UF1868-3FA00
3TX7686-0A
3UF1868-3GA00
3TX7696-0A
For covering the screw terminal for direct mounting on contactor
(cover required per contactor/transformer assembly)
3UF1848
3TX7466-0B
3UF1850, 3UF1852
3TX7506-0B
3UF1854 to 3UF1857
3TX7536-0B
3UF1868-3FA00
3TX7686-0B
3UF1868-3GA00
3TX7696-0B
© Siemens AG 2014