Current Transformer - Siemens 3UF1843 Instrucciones

Current transformer

Operating instructions
!
WARNING
HAZARDOUS VOLTAGE.
Can cause electrical shock and burns.
Disconnect power before proceeding
with any work on this equipment.
Reliable functioning of the equipment is only ensured
with certified components.
Limited protection against contact with live
parts
Degree of protection IP20 to IEC 60529, DIN 40 050.
Shock protection for 3UF1845 by additional terminal
covers.
Commissioning and maintenance by qualified personnel
only.
Follow the Operating Instructions!
Application
The 3UF18.. current transformer can be used as a line-
side transformer for the SIMOCODE basic unit 3UF10
and 3UF20 or for the 3UB11 electronic overload relay.
Other applications are also possible (see also catalog).
Current transformer must not be operated without a load
on the secondary side!
When using SIMOCODE 3UF10/20 in EExe mode to
DIN VDE 0165, current transformers 3UF1843-.. may only
be operated in the restricted transformer range
(see Fig. I)!
1
) Current transformer
2
) Working range of transformer
3
) Transformation ratio
4
) Rated frequency
5
) Rated insulation voltage
6
) Weight
Installation
Separate mounting
For dimension drawings see Fig. II and III (dimensions in
mm).
Snap onto 35 mm standard mounting rail to
DIN EN 50022 or fix on a surface with two M4 screws
and enclosed push-in lugs (see Fig. III).
Minimum clearances to earthed parts see Fig. III
Can be mounted in any position.
2
Order No.: 3ZX1012-0UF18-1AA1
Technical data
Accuracy
Max. secondary load
(burden)
Conductor length between transformer secondary side
and
- 3UF
- 3UB
Relevant standards
Ambient temperature:
- Operation
- Storage
Short-circuit protection
Fuse data for transformer and contactor according to
IEC 60947-4 and DIN VDE 0660 Part 104.
Suitable for use on a circuit capable of delivering not
more than 5000 RMS symmetrical amperes.
1
) Current transformer
2
) Working range of transformer
3
) Type of contactor
4
) Rated operating current
5
) Maximum fuse ratings
Connection
Terminal screws which are not used must be tightened
as well.
Terminals of the 3UB11 suitable only for connection of
one conductor. Terminals are therefore connected via
fitted bridge. Double conductors should be compressed,
for example, with a terminal pin. Use 75 °C copper wire
only.
Permissible cross-sections
- for primary conductors see Fig. V
- for secondary conductors see Fig. VI
Accessories
Terminal cover for 3UF1845
1
)!
(Order No.: 3TX7446-0A)
3UF1843, 3UF1845
DIN VDE 0660, IEC 60947-4
English
±3 %
100 mΩ
4 m for 2.5 mm²
2.5 m for 1.5 mm²
6 m for 2.5 mm²
3.5 m for 1.5 mm²
DIN VDE 0660 Part 104
IEC 60947-4
DIN 57 165
UL 508
CSA C 22.2
–25 to +60 °C
–40 to +85 °C
(see Fig. IV)