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General Catalogue • Modular Devices • Technical
Standard Current Transformers to plug-in System
Adaptor - JFA03
Standard CT to plug-in Adaptor
The JFA03 converter allows for the connection of up to three
standard current transformers, or standard split-core current
transformers (with 1A or 5A secondary’s), to the plug-in system.
The unit has integrated protection circuitry allowing for disconnection
from meter under load conditions for maintenance.
Important Note
This converter does not provide electrical isolation.
Current transformer secondaries may not be earthed and should be
wired as shown.
Technical Specification
Burden:
<2VA per channel (5A Version)
<0.5VA per channel (1A Version)
Accuracy:
0.4%
Suggested Cable Size:
1.5mm
2
or 2.5mm
2
(2.5mm
2
Max.)
(CT to Adaptor)
Mounting:
DIN rail 35mm
Termination:
CT to adaptor - Rising clamp
screw terminals
Adaptor to Meter - RJ45 Patch
Cable
Operating Temperature:
–10°C…+45°C
Storage Temperature:
–25°C…+70°C
Dimension Diagrams (mm)
53
58
90
45
5A or 1A secondary
330mV
CT 1
S1
S1
S1
S2
S2
S2
CT 2
CT 3
3 x Standard
Current Transformers
Plug-in Energy Meter
Meter
Converter
S1 S2 S1 S2 S1 S2
• Connect up to 3 standard or split core CT’s
(1A or 5A
secondaries)
• Integrated protection circuitry