Technical Specifications
Safety and environmental conditions
CE marking
LV directive 2014/35/EU
RoHS directive (EU) 2015/863
Standard
EN-IEC 61010-1:2010
WEEE directive 2012/19/EU
This product is designed to be safe under the following conditions:
Location
Indoor use
Altitude
Up 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 humidity
5% to 85%, non condensing
Pollution degree
2
Degree of protection
IP20
The CT27 is only suitable for insulated primary conductors.
Specifications
Standard
IEC 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 level
0,72/3/- kV
Rated frequency
50/60 Hz
Class of insulation
A (105 °C / 221 °F)
Secondary terminal
Female 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
S49 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.
