Why heat-shrinkable terminations for voltage up to 1 kV are divided into two types: for internal and for external use?
The main reason for that is tracking. Tracking is the creation of carbon paths on the surface of heat-shrinkable terminations as a result of electrical tension, humidity and dirt. This all tell about soon loss of functional capacity of the termination. That is why terminations for 10 kV are divided into type types: for internal and external use. Terminations for external use have additional resistance to tracking. Tracking of the external terminations is proved to occur when the voltage is more than 3 kV. So terminations for 1 KV are not divide into these two types. The most practical choice is termination up to 1 kV.
Can terminations for 10 kV for paper insulated cables be used for XLPE insulated cables?
No, they cannot. They have different grading of the electrical field, shielding, restoring of insulation and earthling. These factors make the termination designed for paper insulated cables not possible to be used for XLPE insulated cables.
Why terminations for 10 kV are divided into two types: designed for cables with paper insulation and cables for XLPE insulation, but terminations for 1 kV are not divided into these two types?
Terminations for 10 kV are divided into these two types because these two cables have a different system of shielding, grading of the electrical field, earthling and restoring of insulation. Cables for 1 kV do not have that many and dramatic differences, that is why they both can be insulated with termination for 1 kV. Termination for 1 kV can also be used for a cable with PVC insulation.
Can lugs and ferrules be used together with termination made by KBT?
Yes, they can. All terminations made by KBT were designed so that they can be used with bolt connectors, ferrules or ferrules. KBT guarantees that all the terminations suit and match KBT lugs and ferrules in corresponding sizes.
What is better- a cold shrinkable or a heat-shrinkable sleeve?
The man circumstance that should be considered in this case is the possibility of using a heat gun. If the use of a heat gun is not possible for some reasons, it’s better to choose a cold shrinkable sleeve. The main difference though is the price. The cold shrinkable sleeve is more expensive but can solve a problem when it is not possible to use heating for shrinkage.
When should cold shrinkable and cast resin joints be used?
They can be used when safety regulations and requirements do not let to use heating for works, for example, in explosion and fire hazard environments. This kind of joints can be sued for a flexible cable with rubber insulation.
Could you please recommend a water-resistant marker for notes on a cable tag?
KBT has special markers ФМ. They are designed for notes on plastic and metal tags.
The width of the line is 0.75 mm. The markers do not have any odor, they are water-resistant. You can use them for notes on plastic, metal, films, ceramics, glass and carton surfaces.
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Which can I use a heat-shrinkable termination for a copper conductor with paper insulation, lead sheath tape armor and PVC jacket ЦСБШнг(А)-LS 3х185-6? Can I insulate somehow one of the four sections of the termination, because my cable has only three wires?
We can recommend the following terminations: 3КВТп-10-150/240(Б) for internal use and 3КНТп-10-150/240(Б) for external use, or 3СТп-10-150/240(Б).
Please pay attention to the fact that terminations 3КВ(Н)Тп-10 and 3СТп-10 are not flame retardant.
Terminations with 4 sections that you mentioned 4ПКТпнг-LS and 4ПСТнг-LS cannot be used for voltage more than 1 kV. Your cable is designed for voltage up to 6 kV, so there is no reason to think about the termination of one section because they cannot be sued with your cable.
Due to a very long delivery period, that is 7 weeks, I would like to choose a substitute for a termination made by Rychem - EPKT 2053 together with SMOE 60873.
Have checked information at your website and found termination 3ПКТп-6-70/120(Б)нг-LS. Please confirm that I have chosen the correct substitute and tell about the delivery time of 8 pcs, bolt lug diameter should be 16 mm.
We do not have a termination 3ПКТп-6-70/120(Б)нг-LS in KBT product range. The termination 3ПКТп-6-70/120(Б) is not flame retardant. All the rest is ok as a substitute for Rychem EPKT 2053 with earthing SMOE 60873.
You will have the earthling kit is the set. The termination is designed for a bolt connector diameter 13 mm.
As an alternative we can offer a termination without bolt connectors in the set, it is 3ПКТп-6-70/120. Bolt connectors with diameter 16 mm ТМ-120-16-17, ТМЛ-120-16-17, ТМЛ-120-16-18, ТМЛ(DIN)-120-16 can be purchased separately. Please address one of our dealers to know the delivery time to your location.