A cable termination forms the reliable electrical and mechanical interface between a power cable and a transformer, a distribution substation, or an overhead line section. It ensures defined electric field distribution, protects against moisture, and guarantees electrical strength over the entire service life. The correct installation of a cable termination is critical to the service life of the entire cable route – the installer’s training and routine are indispensable here.
What functions does a cable termination perform?
A cable termination performs three central tasks: it controls the electric field at the cable end, protects the insulation from environmental influences such as moisture, contamination, and mechanical stress, and establishes the electrical connection to the downstream equipment. They are available in indoor and outdoor designs, as well as in heat-shrink, cold-shrink, and slip-on technology.
Key Characteristics at a Glance
- Control of the electric field at the cable end
- Protection against moisture, dirt, and mechanical stress
- Available for low voltage, medium voltage, and high voltage
- Various installation techniques (heat-shrink, cold-shrink, slip-on)
- Maintenance-free designs with a service life of over 30 years
- Plug-in terminations for fast commissioning
- Plug-in variants for modern medium-voltage switchgear
Frequently Asked Questions
What is the difference between indoor and outdoor terminations?
Outdoor terminations are designed to ensure adequate creepage distance even in rain, UV radiation, and contamination. Indoor terminations can be more compact and have shorter shed spacing, since these environmental factors do not act to the same degree.
Which installation technique is best?
Cold-shrink terminations have become established for many applications, as they can be installed without a flame or heat source. Heat-shrink remains a proven alternative, while slip-on technology is mainly used in the high-voltage range.
What are the most common faults with cable terminations?
The most common faults are moisture ingress, faulty shield grounding, mechanical damage during installation, and inadequate field control. Careful installation by trained personnel, clean working practices, and final testing reliably prevent most problems.
How long does professional installation of a termination take?
Between 2 and 8 hours, depending on the voltage level, design, and the installer’s experience. Cold-shrink terminations for medium voltage can be installed in 1 to 2 hours, while high-voltage terminations with elaborate field control require significantly more time. Care clearly takes precedence over speed here.
We are happy to advise you on any questions relating to cable terminations, installation, and design. Contact our team for an individual solution.