H1: XZP-210 DC Suspension Insulator (U210B) — 210kN, 545mm Creepage, 140kV DC Dry Withstand, Zinc Sleeve Protection, Brown/Light Gray Glaze, IEC 60383

The XZP-210 DC Suspension Insulator (U210B) is a premium high‑strength cap‑and‑pin disc insulator specifically engineered for high‑voltage direct current (HVDC) overhead transmission lines. Designed to meet the unique challenges of DC transmission — including DC ageing and electrolytic corrosion — this insulator delivers exceptional performance in heavy pollution areas with its advanced shed profile design and specialized material composition.

 

Manufactured in compliance with IEC 60383 international standards, this DC insulator features a robust porcelain body with superior characteristics to resist DC ageing. The pins are equipped with zinc sleeves to prevent DC electrolytic corrosion, ensuring long‑term reliability in HVDC applications. The unit is available in either brown (standard) or light gray (optional) glaze, both offering identical mechanical and electrical performance.

 

With a combined mechanical and electrical (M&E) failing load of 210kN — significantly higher than the 160kN model — and a nominal creepage distance of 545mm, the XZP-210 delivers dependable performance on ±400 kV to ±800 kV HVDC transmission lines in the most challenging environments. The large 320mm diameter and 170mm spacing provide excellent pollution flashover performance and mechanical stability.

 

The advanced DC‑optimized shed design incorporates a specialized profile that maximizes creepage length while maintaining superior self‑cleaning properties. The porcelain material’s superior DC ageing resistance, combined with zinc sleeve protection against electrolytic corrosion, ensures decades of reliable service in HVDC applications where AC insulators would fail prematurely.

 

Whether you are designing new HVDC transmission corridors with higher mechanical requirements, upgrading existing DC lines, or expanding national grid interconnections, the XZP-210 DC suspension insulator offers a durable, high‑performance choice for your HVDC infrastructure, with the flexibility to select your preferred glaze color.

 

H2: XZP-210 DC Suspension Insulator — Technical Specifications (Brown & Light Gray Glaze)

The XZP-210 DC suspension insulator is rated with a combined mechanical and electrical (M&E) failing load of 210kN — the highest in the XZP DC series — making it suitable for tangent suspension, light‑tension, strain, and dead‑end applications on ±400 kV to ±800 kV HVDC transmission lines where maximum mechanical strength is required.

 

Its nominal creepage distance of 545mm — significantly longer than standard AC designs — provides superior pollution flashover performance in heavy industrial, coastal, and desert environments. The DC dry withstand voltage reaches 140kV, and the DC wet withstand voltage is 55kV. The dry lightning impulse withstand voltage is 140kV (positive) and 150kV (negative).

 

The nominal diameter is 320mm, with a unit spacing (height) of 170mm. These larger dimensions provide increased surface area for improved pollution performance and enhanced mechanical stability. The advanced DC‑optimized shed profile is specifically designed to resist DC ageing and maintain insulation integrity.

 

The coupling hardware is the 20R ball‑and‑socket type, ensuring full interchangeability with existing HVDC fittings per IEC dimensional requirements. The “R” designation indicates the heavy‑duty rotary coupling design.

 

The pins are equipped with zinc sleeves to prevent DC electrolytic corrosion — a critical feature for HVDC applications where standard galvanised pins would degrade due to unidirectional current flow.

 

The glaze is available in both brown (standard) and light gray (optional). All other technical parameters — mechanical, electrical, and dimensional — are identical between the two color options.

 

Every unit undergoes a routine tension load test of 105kN — significantly higher than the 80kN of the 160kN model — to verify mechanical integrity prior to dispatch. The SF₆ puncture withstand voltage reaches 210kV, demonstrating exceptional dielectric robustness.

 

H2: XZP-210 DC Suspension Insulator — Complete Technical Data (Brown vs. Light Gray Glaze)

The following table lists all technical parameters for both glaze color options. All values are identical except for the glaze color.

Parameter	XZP-210 (Brown Glaze)	XZP-210 (Light Gray Glaze)
Glaze Color	Brown	Light Gray
Type Designation	XZP-210 (U210B)	XZP-210 (U210B)
Figure No.	1	1
Diameter D (mm)	320	320
Unit Spacing H (mm)	170	170
Nominal Creepage Distance L (mm)	545	545
Coupling Size	20R	20R
Rated M&E Failing Load (kN)	210	210
Routine Tension Load (kN)	105	105
Impact Load (N·m)	10	10
DC Dry Withstand Voltage (kV)	140	140
DC Wet Withstand Voltage (kV)	55	55
Dry Lightning Impulse Withstand (Positive) (kV)	140	140
Dry Lightning Impulse Withstand (Negative) (kV)	150	150
SF₆ Puncture Withstand Voltage (kV)	210	210
Net Weight, Approximate (kg)	13.6	13.6
Applied Standard	IEC 60383	IEC 60383

Note: The XZP-210 DC suspension insulator is specifically engineered for HVDC applications with DC‑optimized shed design, superior DC ageing resistance, and zinc sleeve protection against electrolytic corrosion.

 

The 210kN rating provides significantly higher mechanical strength than standard DC insulators, making it ideal for the most demanding HVDC projects. Both brown and light gray glazes offer the same outstanding performance.

 

H2: XZP-210 DC Suspension Insulator — DC‑Specific Design Features

The XZP-210 DC suspension insulator incorporates several design features specifically developed for HVDC transmission that set it apart from conventional AC insulators:

• Zinc sleeve protection — The pins are equipped with zinc sleeves that prevent DC electrolytic corrosion. In HVDC applications, unidirectional current flow can cause accelerated corrosion of standard galvanised components. The zinc sleeves act as a sacrificial anode, protecting the critical pin components and ensuring long‑term mechanical integrity.
• DC‑optimized porcelain material — The high‑grade porcelain body is formulated with superior characteristics to resist DC ageing. Unlike AC insulators, DC insulators are subject to continuous unidirectional voltage stress that can accelerate dielectric ageing. Our special porcelain formulation maintains consistent dielectric strength throughout the insulator’s service life.
• Advanced shed profile — The DC‑optimized shed geometry is specifically designed to maximise the 545mm creepage distance while maintaining effective self‑cleaning properties. The optimized profile enhances pollution flashover performance in heavy contamination areas where DC insulators are particularly vulnerable.
• Higher mechanical strength — The 210kN rating with 20R coupling provides a significant 50kN (31%) strength advantage over the 160kN model, ensuring reliable mechanical performance under the most extreme conditions of long‑span HVDC river crossings, heavy icing, and seismic zones.
• IEC 60383 compliance — Full compliance with international standards ensures global interchangeability and quality assurance.

 

Each XZP-210 DC suspension insulator is produced from high‑grade porcelain, fired at over 1,300 °C using the wet process, achieving maximum density and near‑zero porosity. The zinc sleeves are precision‑applied to ensure optimal corrosion protection throughout the insulator’s service life.

 

The cement bonding between the porcelain body and metal parts uses high‑quality Portland cement, guaranteeing mechanical stability across extreme thermal cycling from ‑70 °C to +105 °C.

 

The hard, glossy glaze — available in brown or light gray — further enhances self‑cleaning and maintains surface integrity over decades of service. Both glaze colors are applied using the same high‑quality process, ensuring identical durability, hardness, and electrical performance.

 

H2: XZP-210 DC Suspension Insulator — Applications and Installation

The XZP-210 DC suspension insulator is widely deployed on ±400 kV to ±800 kV HVDC transmission lines, as well as HVDC converter station entries, back‑to‑back HVDC interconnections, and long‑distance bulk power transmission corridors where DC technology is the preferred solution and maximum mechanical strength is required.

 

The 210kN mechanical rating — significantly higher than the 160kN model — combined with the 545mm creepage distance, 320mm diameter, and DC‑specific design features makes it particularly suitable for:

• ±400 kV to ±800 kV HVDC transmission lines – Where the highest reliability and maximum mechanical strength are required for bulk power transmission over long distances.
• Heavy pollution areas – Industrial zones, coastal regions, and desert environments where pollution flashover is a significant risk for DC lines.
• Ultra‑long‑span river crossings and mountain passes – Where mechanical loads are at their most extreme and DC insulators must maintain reliable performance with maximum strength margins.
• HVDC converter stations – Strain and dead‑end towers at converter station entries where DC‑specific insulators with high mechanical ratings are essential.
• National grid interconnections – Back‑to‑back HVDC links and transmission corridors where bulk power must be transmitted efficiently and reliably.
• Renewable energy integration – Offshore wind HVDC connections and long‑distance renewable energy transmission.

 

The 20R coupling with zinc sleeves ensures compatibility with existing HVDC hardware and provides protection against electrolytic corrosion. The DC‑optimized shed design facilitates hot‑stick handling for live‑line maintenance.

Typical application scenarios include:

• ±400 kV HVDC lines – Suspension and strain applications where DC‑optimized design with high mechanical strength is required.
• ±500 kV HVDC lines – Heavy‑duty strain and dead‑end towers requiring maximum mechanical strength and pollution performance.
• ±800 kV UHVDC lines – Ultra‑high‑voltage DC transmission where only the highest performance insulators with maximum mechanical ratings are acceptable.
• Critical HVDC infrastructure – Lines where system reliability is paramount and maximum strength margins are required.

 

The 20R ball‑and‑socket coupling ensures compatibility with existing HVDC clevis pins, yokes, and socket hardware. The DC‑specific design features — zinc sleeves, DC‑optimized shed profile, and special porcelain formulation — ensure maximum reliability in HVDC applications.

 

For higher voltage requirements, multiple units of the XZP-210 DC suspension insulator can be assembled in strings. Explore our full range of suspension insulators and transmission hardware for more options.

 

H2: XZP-210 DC Suspension Insulator — Quality and Performance Advantages

The XZP-210 DC suspension insulator offers the highest level of quality and performance for HVDC transmission applications, with several key advantages over the standard 160kN model and conventional AC insulators:

• 210kN mechanical rating – Provides 50kN (31%) higher mechanical strength than the XZP-160, offering maximum capacity for the most demanding HVDC applications.
• DC‑optimized porcelain formulation – Superior resistance to DC ageing, ensuring decades of reliable dielectric performance.
• Zinc sleeve protection – Prevents DC electrolytic corrosion, extending mechanical service life significantly compared to standard galvanised pins.
• 545mm creepage distance – Provides superior pollution flashover performance in heavy contamination environments.
• 320mm diameter – Large surface area for improved pollution performance and self‑cleaning.
• DC wet withstand voltage 55kV – Enhanced wet performance for reliable operation in rain, fog, and high‑humidity conditions.
• SF₆ puncture withstand 210kV – Exceptional dielectric robustness demonstrating the quality of the porcelain and DC‑optimized design.
• 105kN routine tension load – Highest routine tension test load in the DC series, demonstrating superior mechanical integrity.
• 20R coupling with zinc sleeves — Heavy‑duty rotary coupling design with corrosion protection for HVDC applications.
• IEC 60383 compliance – Manufactured to international standards for global quality assurance.

 

At 13.6kg, the XZP-210 offers an excellent strength‑to‑weight ratio for a 210kN DC insulator — only 0.4kg heavier than the XZP-160 (13.2kg) while delivering a 50kN (31%) higher mechanical rating.

 

With an expected service life exceeding 50 years under normal HVDC operating conditions, the XZP-210 requires minimal routine maintenance. Every unit undergoes 100% routine testing before dispatch, including:

• Visual and dimensional inspections.
• Routine tension load verification (105 kN).
• DC dry and wet withstand voltage tests.
• Porosity and temperature‑cycle prototype testing per IEC 60383.

 

Each insulator is individually foam‑cushioned and securely packed in durable wooden crates or corrugated cartons. This prevents damage during transit. We offer flexible shipping arrangements (FOB, CIF, EXW) with lead times of 15–30 days, depending on order quantity.

 

For detailed product datasheets, CAD drawings, or competitive pricing on the XZP-210 DC suspension insulator (brown or light gray), please contact our sales team via the inquiry form below.

 

We also provide OEM services and complimentary technical consultation for HVDC string assembly design. For installation guidance, refer to our insulator string assembly guide.

 

H2: XZP-210 DC Suspension Insulator — Why Choose Our Product?

Selecting the right DC suspension insulator for your HVDC infrastructure is critical to long‑term grid reliability — especially in heavy pollution areas with extreme mechanical demands. Our XZP-210 DC suspension insulator is manufactured under stringent quality control protocols at every production stage.

 

From raw material sourcing (DC‑optimized high‑grade porcelain clay) to final high‑voltage DC testing, every step aligns with IEC 60383. We understand that the most demanding HVDC transmission projects require the highest levels of mechanical strength, pollution performance, and DC‑specific protection — where standard 160kN DC insulators may not provide adequate safety margins.

 

That is why the XZP-210 DC suspension insulator is specifically engineered with a 210kN mechanical rating — 50kN (31%) higher than the standard 160kN model — combined with zinc sleeve protection against DC electrolytic corrosion, DC‑optimized porcelain with superior resistance to DC ageing, a DC‑optimized shed profile with 545mm creepage distance, and 20R heavy‑duty coupling to deliver maximum performance in the most demanding HVDC applications. Additionally, we offer both brown and light gray glaze options to match regional preferences or project specifications.

 

With over a decade of experience in porcelain insulator production — including specialized DC insulator manufacturing — we offer competitive factory pricing, prompt delivery, and dedicated after‑sales technical support.

 

Whether you require a small sample batch for project validation or a full container shipment, the XZP-210 DC suspension insulator (brown or light gray) is available with short lead times. Contact us today to discover how the XZP-210 DC suspension insulator can strengthen your HVDC grid reliability with its superior mechanical strength and DC‑optimized design.

 

XZP DC Series — XZP-160 vs XZP-210 Comparison

Parameter	XZP-160 (U160BL)	XZP-210 (U210B)	Advantage
M&E Failing Load	160 kN	210 kN	+50 kN (+31%)
Routine Tension Load	80 kN	105 kN	+25 kN
Diameter D	320 mm	320 mm	Identical
Unit Spacing H	170 mm	170 mm	Identical
Creepage Distance L	545 mm	545 mm	Identical
Coupling Size	20R	20R	Identical
DC Dry Withstand	140 kV	140 kV	Identical
DC Wet Withstand	55 kV	55 kV	Identical
Lightning Impulse (+/-)	140 / 150 kV	140 / 150 kV	Identical
SF₆ Puncture	210 kV	210 kV	Identical
Zinc Sleeve Protection	✓	✓	Identical
DC Ageing Resistance	✓	✓	Identical
Net Weight	13.2 kg	13.6 kg	+0.4 kg (minimal for +50kN)
Key Advantage	Standard DC strength	Maximum DC strength	31% higher M&E with minimal weight increase

 

XZP DC Series — Key Specifications Summary

Parameter	XZP-160 (U160BL)	XZP-210 (U210B)
M&E Failing Load	160 kN	210 kN
Routine Tension Load	80 kN	105 kN
Impact Load	10 N·m	10 N·m
Nominal Diameter D	320 mm	320 mm
Unit Spacing H	170 mm	170 mm
Creepage Distance L	545 mm	545 mm
Coupling Size	20R	20R
DC Dry Withstand Voltage	140 kV	140 kV
DC Wet Withstand Voltage	55 kV	55 kV
Lightning Impulse (+/-)	140 / 150 kV	140 / 150 kV
SF₆ Puncture Withstand	210 kV	210 kV
Zinc Sleeve Protection	✓	✓
DC Ageing Resistance	✓	✓
Net Weight	13.2 kg	13.6 kg
Glaze Options	Brown / Light Gray	Brown / Light Gray
Best Application	±400kV – ±800kV HVDC	±400kV – ±800kV HVDC (maximum strength required)