India’s solar market has seen a rapid succession of major contracts recently, covering three core areas: EPC turnkey projects, engineering consulting, and the supply of key equipment. Among them, Diamond Power Infrastructure has secured a power cable supply order worth ₹661.8 million from Hild Projects, with products explicitly designated for large-scale ground-mounted photovoltaic power plants – including the 240 MW NTPC Rajasthan project and a 1,125 MW photovoltaic cluster in the Bhuj area.
Such projects impose stringent performance requirements on cables: long-term weather resistance, UV resistance, low-smoke zero-halogen (LSZH) / halogen-free flame-retardant (HFFR) properties, high insulation ratings (up to 200 kV), and compatibility with both DC-side (PV string) and AC-side (inverter output & grid interconnection) operating conditions. The core cable types include solar-specific AC/DC cables, BESS interconnection cables, and high-voltage grid-connection cables, all of which rely on highly consistent, high-purity insulation and sheath extrusion processes.
Against this backdrop, the High-Efficiency Cable Extruder Series (Models 35–200) by Jiangsu Hopda Machinery Co., Ltd. provides critical equipment support to meet these process requirements. Designed exclusively for wire and cable manufacturing lines, this series covers the entire extrusion process for insulation and sheathing of low- to medium-voltage cables. It is compatible with specialty insulation materials widely used in the photovoltaic industry, including PVC, XLPE, LSZH, HFFR, and Teflon.
The extrusion output parameters are precisely matched to actual production cycles:
- For LSZH materials, the stable output ranges from 85–1700 kg/h, supporting continuous, high-efficiency molding that ensures low-smoke zero-halogen flame-retardant performance in mass production of PV cables.
- For XLPE, the extrusion capacity reaches 65–1100 kg/h, enabling large-scale and stable production of medium-voltage XLPE-insulated cables (e.g., 3.3 kV–33 kV cables for PV collection lines).
- Teflon extrusion capability of 60–200 kg/h accommodates flexible manufacturing of small-batch, high-value-added products such as high-temperature, high-weatherability DC connector cables.
The equipment features specialized screw structures optimized for different insulation materials, paired with an advanced temperature control system. This ensures uniform melt temperature and stable cross-linking pre-curing conditions for heat-sensitive materials such as PE and XLPE during extrusion, which directly determines the dielectric strength, aging life, and on-site installation reliability of the cables.
A large touchscreen and multilingual HMI reduce operational complexity, allowing local technical workers in India to operate the line quickly. Customization for electrical component brands and interface languages is supported, improving line integration compatibility.
Its typical applications – including cable plant capacity upgrading, replacement of outdated extrusion lines, and production of high-consistency insulation layers – align perfectly with the needs of manufacturers such as Diamond Power Infrastructure to expand production capacity, upgrade processes, and improve quality stability amid surging PV orders in India.
The machine comes with a 1-year warranty, supported by online remote guidance and on-site maintenance services, addressing overseas customers’ practical concerns regarding the speed and reliability of after-sales support.
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