{"id":332,"date":"2026-04-03T08:36:25","date_gmt":"2026-04-03T00:36:25","guid":{"rendered":"https:\/\/gd-penglong.com\/?post_type=product&p=332"},"modified":"2026-04-03T08:42:28","modified_gmt":"2026-04-03T00:42:28","slug":"extra-high-voltage-cable","status":"publish","type":"product","link":"https:\/\/gd-penglong.com\/index.php\/product\/extra-high-voltage-cable\/","title":{"rendered":"Extra High Voltage Cable"},"content":{"rendered":"

Extra High Voltage Cables by RRH are designed for the most intensive power applications, operating at 800kV and above to serve large-scale utilities, industrial hubs, and super-sized infrastructure projects. These cables feature ultra-thick, high-performance insulation (such as oil-impregnated paper or advanced polymers) that can withstand extreme electrical fields, ensuring safe operation even under maximum load. The conductors, often made of high-purity copper or aluminum, are engineered for low resistance, enabling the transmission of massive power volumes\u2014ideal for connecting large power plants to major substations or powering energy-intensive industries like steel manufacturing. RRH\u2019s extra-high voltage cables include reinforced armor and corrosion-resistant jackets, making them suitable for harsh environments, including undersea installations. With strict adherence to global standards, these cables deliver unmatched reliability for critical, high-power infrastructure.<\/p>\n

Product Advantage<\/h2>\n

Improved Durability with top quality manufactured insulation ensuring full compliance with industry standards, designed to withstand extreme temperatures, moisture and physical harms<\/p>\n

RRH Cable we have the capability to manufacture grade A 99.9% pure copper precisely stranded in the insulators for the best conductivity and efficiency<\/p>\n

Thanks to our expert craftsmanship, we provide high-quality cables that minimize the need for frequent maintenance or replacements, significantly reducing long-term operational costs.<\/p>\n

Technical Parameters<\/h2>\n

Size (mm\u00b2)\u00a0 \u00a0 AWG\/kcmil\u00a0 \u00a0Voltage Class Ampacity (A)\u00a0 \u00a0Insulation\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Armor\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Shielding\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Conductor Material\u00a0 Core Type # Conductors Temp Rating (\u00b0C) # Strands
\n240 mm\u00b2\u00a0 \u00a0 \u00a0 \u00a0500 kcmil\u00a0 \u00a0 \u00a0110\u2013220 kV\u00a0 \u00a0 \u00a0 \u00a0 \u00a0600\u2013800 A\u00a0 XLPE \/ Oil-PILC\u00a0 \u00a0Optional (SWA) Copper wire screen Copper \/ Aluminum\u00a0 \u00a0 Single Core\u00a0 \u00a0 \u00a0 1C\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 90\/130\/250\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 61\u201391
\n400 mm\u00b2\u00a0 \u00a0 \u00a0 \u00a0750 kcmil\u00a0 \u00a0 \u00a0110\u2013230 kV\u00a0 \u00a0 \u00a0 \u00a0800\u20131000 A\u00a0 XLPE \/ Oil-PILC\u00a0 \u00a0 Optional (SWA) Copper wire screen Copper \/ Aluminum\u00a0 \u00a0 Single Core\u00a0 \u00a0 \u00a0 1C\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a090\/130\/250\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 91\u2013127
\n630 mm\u00b2\u00a0 \u00a0 \u00a0 1250 kcmil\u00a0 \u00a0 220\u2013330 kV\u00a0 \u00a0 1000\u20131300 A\u00a0 XLPE \/ Oil-PILC\u00a0 \u00a0 Optional (SWA) Copper wire screen Copper \/ Aluminum\u00a0 \u00a0 \u00a0Single Core\u00a0 \u00a0 \u00a0 1C\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 90\/130\/250\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0127+
\n800 mm\u00b2\u00a0 \u00a0 \u00a01600 kcmil\u00a0 \u00a0 220\u2013400 kV\u00a0 \u00a0 1200\u20131400 A\u00a0 XLPE \/ Oil-PILC\u00a0 \u00a0 Optional (SWA) Copper wire screen\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Copper\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Single Core\u00a0 \u00a0 \u00a0 1C\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 90\/130\/250\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 127\u2013169
\n1000 mm\u00b2\u00a0 \u00a0 2000 kcmil\u00a0 \u00a0330\u2013500 kV\u00a0 \u00a0 1400\u20131700 A\u00a0 \u00a0XLPE \/ Oil-PILC\u00a0 Optional (SWA) Copper wire screen\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Copper\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0Single Core\u00a0 \u00a0 \u00a0 1C\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a090\/130\/250\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 169\u2013200<\/h6>\n

Key Points<\/strong>
\nArmor Steel Wire Armor (SWA) optional for underground or mechanical protection.<\/p>\n

Shielding Copper wire\/tape screen around conductor and insulation to manage high voltage electric fields.<\/p>\n

Insulation XLPE (modern dry type) or Oil-impregnated paper (PILC) for historical and special cases.<\/p>\n

Core Type Generally single-core for EHV due to electrical field management; three-core cables rare at these voltages.<\/p>\n

Stranding Multi-stranded (61\u2013200 strands) to increase flexibility, reduce skin effect losses.<\/p>\n

Temperature Ratings 90\u00b0C (continuous), 130\u00b0C (overload), 250\u00b0C (short-circuit, 5 sec).<\/p>\n

Product Uses<\/strong>
\nRegional Power Transmission carries high volumes of electricity from major power plants to urban and industrial centers.<\/p>\n

Urban Underground Transmission replaces overhead lines in cities where space is limited and aesthetics matter.<\/p>\n

Renewable Energy Integration transfers wind, solar, and hydro power from generation sites to the main grid.<\/p>\n

Substations Interconnection connects major substations to improve grid reliability and flexibility.<\/p>\n

Industrial Megaprojects supplies heavy industries, data centers, and special economic zones needing very high power.<\/p>\n

Airport and Metro Systems powers large transport systems efficiently without visible infrastructure.<\/p>\n

Product Operate Guide<\/strong>
\nApply cable base on its insulation property<\/p>\n

Always de-energize the system before working on cables<\/p>\n

Proper PPE duing operation<\/p>\n

Key Features<\/p>\n","protected":false},"excerpt":{"rendered":"

Extra High Voltage (EHV) cables are designed for electrical transmission systems operating between 110 kV and 500 kV.
\nThey are essential for moving large amounts of electricity efficiently across medium to long distances, typically inside cities, across regions, and in critical infrastructure projects.<\/h6>\n","protected":false},"featured_media":305,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[55],"product_tag":[],"class_list":{"0":"post-332","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-products","8":"first","9":"instock","10":"shipping-taxable","11":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/gd-penglong.com\/index.php\/wp-json\/wp\/v2\/product\/332","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gd-penglong.com\/index.php\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/gd-penglong.com\/index.php\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/gd-penglong.com\/index.php\/wp-json\/wp\/v2\/comments?post=332"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/gd-penglong.com\/index.php\/wp-json\/wp\/v2\/media\/305"}],"wp:attachment":[{"href":"https:\/\/gd-penglong.com\/index.php\/wp-json\/wp\/v2\/media?parent=332"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/gd-penglong.com\/index.php\/wp-json\/wp\/v2\/product_brand?post=332"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/gd-penglong.com\/index.php\/wp-json\/wp\/v2\/product_cat?post=332"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/gd-penglong.com\/index.php\/wp-json\/wp\/v2\/product_tag?post=332"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}