OMEGA 3 PHASE TRANSFORMER SERIES
CT Operating Datasheet
Issue 2.0
Indication
Before initial operation we ask to you pay full attention to these assembling instructions in order to
guarantee the reliability and to ensure the performance of the device.
Functional Description
Current transformers of the model range Omega are inductive 3 single conductor-current
transformers operating according to the transformer principle. Due to the applicated measuring
principle, current transformers of this type may only be installed in alternating current (AC)
networks.
Safety Instructions
TRANSFORMER SERIES
Features
➜Low voltage Current Transformer
➜Omega 3 Phase
In order to avoid personal and material damage the following assembling steps must
be performed only by authorised, qualified and trained personnel.
If the secondary circuit is operated without a burden/load (open) high-voltages may
appear. These voltage values are dangerous for persons as well as for the functional
reliability of the current transformer. It is forbidden to operate the current
transformer without a secondary circuit (open)!
Technical Parameters
Primary current 60A to 630A
Secondary current 5A
Accuracy class 0.5, 1
Rated frequency 50Hz or 60Hz
Rated continuous thermal current (standard) 1,2 x in
Rated short time thermal current lth 60 x in, 1 s (Max 40kA)
Rated isolation level 0.72/3 kV or 0.72/4 kV
Place of insulation Indoor
Altitude up to 2000 m
Degree of protection IP20
Degree of pollution 2
Ambient temperature -5°C to + 65°C
(0-95% relative humidity, non condensing!)
Storage temperature -25°C to + 70°C
Applied standards IEC 60044-1 / IEC 61869-1 : Performance
IEC - 61010 - 2 : Safety
Assembly
1. Ensure a safe work environment during assembly, maintenance and inspection operations. If
necessary interrupt the current supply of the primary conductor and take precautions against
unintentional switching.
2 (i) For Window type CT : Bar or cable primary insert through primary cable or bus bar & fix it using
mounting screw assembly.
P1: Direction of power supply
P2: Direction of power source
3. Connect the secondary wires of the current transformer with the measuring device (ampere meter,
energy meter). Pay attention to the installation guide of the measuring device.
4. Check whether the current transformer is assembled correctly and the secondary leads are
connected properly.
Wiring Diagram
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Environmental Instruction
When the product has reached it’s ‘end of life’, it
must be recycled. Pass it to an electrical waste
disposal. Do not dispose as unsorted municipal
waste!
This product was developed
and manufactured in
accordance with applicable
regulations (IEC61010,
IEC61869) and meets the
requirements of the low
voltage guideline
2014/35/EU.
Sifam Tinsley Instrumentation Ltd
1 Warner Drive
Springwood Industrial Estate
Braintree, Essex
CM7 2YW
Tel: 01376 335271
E-mail: sales@sifamtinsley.com
www.sifamtinsley.co.uk