Description of project | 4
VERSION 1 | EN-US CIRUS
®
UPT-6400 Page 17 of 104
• The dimensions of the pulse transformer should be suitable for the control loop.
• Primary and secondary voltage
• Output
• Duty cycle of transformer
• This transformer must be designed according to EN61558 or UL 5085 (isolating
transformer with reinforced insulation)
• Single-chamber model
Assembly and installation
The following are important for the assembly and installation of the pulse transformer:
• The touch protection must comply with national installation and construction re-
quirements.
• Use the cable cross-sections stated in the application report.
• Clamp the cables to the pulse transformer terminals. Check the terminals regularly
to ensure that they are mounted tightly.
4.5.4 Current transformer
NOTICE
Malfunction due to use of devices from other manufacturers
Devices from other manufacturers can lead to malfunctions in the control loop.
Use only original ROPEX current transformers or ROPEX monitoring current trans-
formers.
The current transformer is a component of the control loop. It may be used only to
measure the current, enabling the temperature controller to determine the heating ele-
ment temperature.
Observe the following notes and comments:
• The current transformer may be started up only when it is properly connected to
the temperature controller; refer to section Connection diagram.
• If the secondary peak current I
2
is less than 30A, the secondary high-current wire
must be passed through the current transformer at least twice; refer to the applica-
tion report.
• If the cross-section is too large or the insulation too thick, use an HCB-1 high-cur-
rent rail to route the cable through the current converter. Further information can
be found in the respective operating instructions.
• ROPEX monitoring assemblies such as the Current Balance Monitor CBM-2 can
be used to increase operating safety. Further information can be found in the re-
spective operating instructions.
• External monitoring assemblies such as insulation monitors or a voltage monitor-
ing device can also be used. Refer to the manufacturer's operating instructions for
more information.
4.5.5 Line filters
CE conformity of the temperature controller can only be achieved with the line filters
recommended and supplied by ROPEX. The line filters damp the reaction of the
phase-angle control on the line and protect the temperature controller against line dis-
turbances.
Observe the following notes and comments:
Always use a ROPEX line filter.
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