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Technical Specifications

Safety and environmental conditions

CE markingLV directive 2014/35/EU

RoHS directive (EU) 2015/863

StandardEN-IEC 61010-1:2010

WEEE directive 2012/19/EU

This product is designed to be safe under the following conditions:

LocationIndoor use

AltitudeUp to 2000m (1.24mi)

Ambient temperature-10°C to +55°C (14°F to 131°F)

Storage temperature-20°C to +70°C (-4°F to 158°F)

Relative humidity5% to 85%, non condensing

Pollution degree2

Degree of protectionIP20

The CT27 is only suitable for insulated primary conductors.

Specifications

StandardIEC 61869-2:2012

Rated short-time thermal

current (Ith)

60 x Ipr / 1s

Rated dynamic current (Idyn)2,5 x Ith

Continuous thermal current

(Icth)

100%

Rated insulation level0,72/3/- kV

Rated frequency50/60Hz

Class of insulationA (105 °C / 221 °F)

Secondary terminalFemale clamping connector,

suitable for conductor size:

0,2 to 1,5mm² solid, stranded

or ferruled (Strip length 8 to

9mm) (0.315 to 0.354in)

Specifications per type

CT27

Secondary

leads format*

0,5mm

2

max. 1,4m

(55in)

0,75mm

2

max. 2,0m

(79in)

1,0mm

2

max. 2,8m

(110in)

1,5mm

2

max. 4,0m

(157in)

Suitable for

cable

ø 7,5mm (0.295in)

Approximate

weight

40g (0.088lb)

* Maximum length secondary leads for 0,1VA at the end of this leads.

Janitza electronics GmbH reserves the right to carry out modifications on

its products, in order to improve them, without prior notice.

CT27 Current Transformer

Installation Guide

Janitza electronics GmbH

Vor dem Polstück 6

35633 Lahnau | Germany

Support +49 6441 9642-22

[email protected] | www.janitza.com

Doc. No. 2.002.160.1.a | Issue date 06/2022

Subject to technical alterration

Explanation of symbols

This product is designed according to the EN-IEC

61010-1:2010 standards and therefore this product

meets the requirements of the Low Voltage Directi-

ve 2014/35/EU.

Read the installation guide before mounting the

product. Unprofessional work activities on electrical

installations may result in a threat of danger to the

life and health of human beings and livestock!

Under no circumstances the secondary circuit of

the CT may be opened when the CT is mounted

on a primary current and current is flowing in the

primary circuit. High voltages may appear on the

secondary leads when this circuit is left open.

RoHS Directive (EU) 2015/863

Janitza electronics GmbH states that they only uses

qualified component in their products from ma-

nufacturers, whose specifications meet or exceed

the requirements of the European Directive for the

Restriction of use of certain Hazardous Substances.

WEEE Directive 2012/19/EU

The ‚crossed out wheeled bin‘ symbol indicates

that the equipment should not be disposed as un-

sorted municipal waste. Contact a qualified recycler

for disposal.

CT27-35

CT27-64

General

The CT27 is a current transformer and can only be used measuring

electrical alternating currents. The CT27 is suitable only for moun-

ting on insulated primary conductors in a weather protected and

dry location.

Read this installation guide before installing the product.

Produktspecifikationer