Removal of the water-oil insulation tube for the CV cable insulation breakdown testing device [Design and Manufacturing]

Product Inquiry

Please leave the design and manufacturing of the water-oil insulation tube to prevent insulation breakdown at the cable termination during the insulation breakdown test of the removed CV cable to us!

A water-oil insulated tube is a type of insulating tube used in insulation breakdown tests to assess the aging condition of CV cables that have been removed from actual power facilities. This tube is inserted into the cable terminals and filled with water and oil to relax the electric field. The purpose of this test is to apply alternating high voltage to the removed CV cable and cause insulation breakdown in the effective electrode part (XLPE). However, at the cable termination (terminal part), the equipotential lines and electric field lines become skewed, concentrating the electric field, which leads to breakdown occurring near the outer conductor of the terminal. By using the "water-oil insulated tube" to fill it with water and oil, the stress of electric field concentration at the terminal is alleviated, and the potential gradient becomes gentler, allowing for an increase in voltage up to the point where insulation breakdown occurs in the effective electrode part. Our company has a long history of involvement in the insulation breakdown testing and terminal processing of removed CV cables (3.3kV to 22kV) as a partner of research institutes related to power. Based on our experience and technology related to this test, we can design and manufacture water-oil insulated tubes according to cable diameter and voltage. Recommended for those who: - Want to observe water tree degradation phenomena - Want to understand the aging condition of CV cables.

Electric Power Tech Systems [Company Website]

basic information

【Specifications】 ■ Usable voltage AC150kV 【Features】 ■ Customizable according to requirements such as tube diameter, tube length, and tube color to match the test voltage ■ Production and application of desired logo marks are possible ■ After-sales support available after delivery → Depending on usage conditions ■ Stand for installing water and oil insulated tubes will be produced ■ New cables can be used without causing terminal destruction (currently verified up to 150kV with 6.6kV new CV cable 22sq) 【Delivery Achievements】 ■ Factory of a wire manufacturer (Kita Nippon Electric Wire Co., Ltd.) ■ Research institutions related to electricity (General Incorporated Foundation, Central Research Institute of Electric Power Industry, General Incorporated Association, Wire Comprehensive Technology Center) 【Note】 The water and insulating oil to be injected into the tube, as well as the silicone packing at the bottom, need to be provided by the customer.

Price range

Delivery Time

OTHER

2 months

Model number/Brand name

Model number: WO130_---_10

Applications/Examples of results

Delivery Performance ■ Wire manufacturer factory (Kita Nippon Electric Wire Co., Ltd.) ■ Power-related research institute (General Incorporated Association Wire Comprehensive Technology Center)

Line up（1）

Model number	overview
Considering the production of AC170kV and AC200kV operating voltage

Distributors

電力テクノシステムズ

Official site

Phone number/address

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