3UG3501 datasheet(35/114 Pages) ETC2

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SIMOCODE 3UF Motor Management and Control Devices

7/35

Siemens LV 1 T · 2006

3UF18 current transformers

for overload protection

■Overview

The 3UF1 8 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

transformers convert the maximum current of the corresponding

operating range into the standard signal 1 A secondary.

■Technical specifications

1) With or without box terminal.

2) Conductor cross-sections for box terminals, see 3TF6 8 and 3TF6 9

contactors in the section Contactors and Contactor Assemblies.

3) With max. conductor cross-section, a terminal cover for maintaining the

phase spacing is required.

Climatic environmental conditions

Temperatures

•Operation

°C

-25 ... +60

• Storage/transport

°C

-40 ... +85

Temperature changes

•Operation

°C/h

max. 10

• Storage/transport

°C/h

max. 20

Relative humidity

15 ... 95 (indoor, acc. to IEC 60721-3, no condensation)

Air pressure

•Operation

hPa

860 ... 1060

• Storage/transport

hPa

650 ... 1060

Contaminants

•SO2

ppm

0.5 (relative humidity

60 %, no condensation)

•H2Sppm

0.1 (relative humidity

60 %, no condensation)

Mechanical environmental conditions

Vibrations

(acc. to IEC 60068-2-6)

10 ... 57 (for constant amplitude 0.15 nm)

57 ... 150 (for constant acceleration 2 g)

Shock (acc. to IEC 60068-2-27)

12 shocks (half sine 15 g/11 ms)

Requirements acc. to IEC and DIN

Degree of protection (acc. to IEC 60529)

IP20

Rated insulation voltage

690/1000 (type-dependent)

Rating of the insulation

(acc. to UL/CSA)

600

Trip class (acc. to IEC 60947-4-1)

Suitable from CLASS 5 to CLASS 30

Power loss per conducting path of the

transformers

Operating range

for setting ...

to the lower limit

to the upper limit

mW (mVA)

• 3UF18 45

12.5 ... 50

33 (38)

570 (650)

• 3UF18 48

25 ... 100

110 (120)

1700 (1900)

• 3UF18 50

32 ... 130

135 (150)

2400 (2700)

• 3UF18 52

50 ... 200

170 (190)

2600 (2900)

• 3UF18 56

100 ... 400

450 (500)

6500 (7000)

• 3UF18 57

125 ... 500

850 (940)

13000 (15000)

• 3UF18 68-3F

160 ... 630

900 (1000)

17000 (19000)

• 3UF18 68-3G

205 ... 820

1400 (1600)

22000 (25000)

Conductor cross-sections

(one or two conductors connectable)

Current transformers

on second-

ary side

on primary side

3UF18 45

3UF18 481) 3UF18 501)

3UF18 52

3UF18 56

3UF18 572)

3UF18 68-

3FA002)

3UF18 68-

3GA002)

• Terminal screw

M 3.5

for connec-

tion data

see 3RT

Contactors

for connec-

tion data

see 3RT

Contactors

for connec-

tion data

see 3RT

Contactors

M 8

M 10

M 12

• Solid

mm2

1.5 ... 2.5

•Stranded

mm2

1.5 ... 2.5

• Finely stranded without end sleeve

mm2

• Finely stranded with end sleeve

mm2

1.5

• Finely stranded with cable lug

mm2

35 ... 95

50 ... 2403)

50 ... 240

185 ... 240

• Stranded with cable lug

mm2

50 ... 120

70 ... 2403)

70 ... 240

185 ... 240

• Connecting bars

6.30

• Tightening torque

0.8 ... 1.4

10 ... 14

14 ... 24

• Tightening torque

7 ... 12

89 ... 124

124 ... 210

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