SIEMENS
10/22
Siemens IC 10 · 2017
* You can order this quantity or a multiple thereof.
Illustrations are approximate
SIMOCODE 3UF Motor Management and Control Devices
3UF18 current transformers for overload protection
10
■
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 mul-
tiple of the primary rated current. The 3UF18 current transform-
ers convert the maximum current of the corresponding operating
range into the standard value of 1 A secondary.
■
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
More information
Home page,
see www.siemens.com/sirius
Industry Mall,
see www.siemens.com/product?3UF18
Type of mounting
Operating range
SD
Screw terminals
PU
(UNIT,
SET, M)
PS*
PG
A
d
Article No.
Price
per PU
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)
20
3UF1843-1BA00
1
1 unit
42J
1.25 … 12.5
1)
20
3UF1843-2AA00
1
1 unit
42J
2.5 … 25
1)
20
3UF1843-2BA00
1
1 unit
42J
12.5 ... 50
20
3UF1845-2CA00
1
1 unit
42J
16 … 65
20
3UF1847-2DA00
1
1 unit
42J
25 … 100
20
3UF1848-2EA00
1
1 unit
42J
For mounting onto contactors and stand-alone installation
3UF1868
Screw fixing
32 … 130
20
3UF1850-3AA00
1
1 unit
42J
50 … 200
20
3UF1852-3BA00
1
1 unit
42J
63 … 250
20
3UF1854-3CA00
1
1 unit
42J
100 … 400
20
3UF1856-3DA00
1
1 unit
42J
125 … 500
20
3UF1857-3EA00
1
1 unit
42J
160 … 630
20
3UF1868-3FA00
1
1 unit
42J
205 … 820
20
3UF1868-3GA00
1
1 unit
42J
For contactor type
SD
Article No.
Price
per PU
PU
(UNIT,
SET, M)
PS*
PG
d
Terminal covers
3TX7466-0A
For transformer/contactor combinations and stand-alone
installation for transformer (cover required per connection
side)
3UF1845
20
3TX7446-0A
1
1 unit
41B
3UF1848
20
3TX7466-0A
1
1 unit
41B
3UF1850, 3UF1852
5
3TX7506-0A
1
1 unit
41B
3UF1854 to 3UF1857
5
3TX7536-0A
1
2 units
41B
3UF1868-3FA00
5
3TX7686-0A
1
1 unit
41B
3UF1868-3GA00
5
3TX7696-0A
1
1 unit
41B
For covering the screw terminal for direct mounting
on contactor (cover required per contactor/transformer
combination)
3UF1848
20
3TX7466-0B
1
1 unit
41B
3UF1850, 3UF1852
20
3TX7506-0B
1
1 unit
41B
3UF1854 to 3UF1857
20
3TX7536-0B
1
1 unit
41B
3UF1868-3FA00
15
3TX7686-0B
1
1 unit
41B
3UF1868-3GA00
15
3TX7696-0B
1
1 unit
41B
© Siemens AG 2016