Telescopic High Voltage DC Earth Discharge Rod (10kV–220kV)

This discharge rod is specifically designed for high-voltage testing environments, particularly for DC withstand voltage tests. It is used to safely discharge the residual charge accumulated during testing, ensuring operator protection.
The complete assembly includes:
Discharge rod + Single-phase grounding wire + Grounding clamp

Discharge Rod Principle

The JINPOWER discharge rod operates through a two-fold mechanism to eliminate residual electrical energy from de-energized equipment. First, the metal discharge hook establishes physical contact with the live part (such as a capacitor or busbar). Then, if equipped with a built-in high-resistance path, the current is gradually directed to ground through the resistive circuit, preventing sudden discharge arcs and operator injury.

This system supports both direct discharge (for small residual voltages or fast grounding) and resistive discharge (for controlled voltage release in high-capacitance systems). By offering dual-functionality, the rod ensures flexible use across different field scenarios, enhancing adaptability for maintenance teams.

In addition, the insulated pole segments effectively isolate the user from high-voltage hazards, while the ergonomic handle allows firm grip and control, even in wet or gloved conditions. The discharge process is fully visual, enabling the operator to monitor grounding contact clearly before proceeding with maintenance or inspection.

Multi-Voltage Compatibility and Flexible Telescopic Design

The JINPOWER discharge rod is engineered to support a wide range of DC and AC voltage applications—from 10kV to 220kV, ensuring safety across both urban and high-voltage utility networks. Each model is matched to its designated voltage class, with sufficient insulation clearance and dielectric strength to withstand induced voltages in overhead lines, switchgear panels, and substation terminals.

To meet the needs of different working distances and storage constraints, the rod is offered in 2-section, 3-section, and 4-section telescopic models, covering effective lengths of 1.3m, 1.7m, 2.4m, and 3.4m, with a compact storage length of just 65cm. This stretch-collapsible design enables quick deployment on-site while ensuring convenient transport and storage in confined vehicles or tool kits.

Each segment locks securely into place during operation, and the non-slip joints prevent accidental collapse under vertical or lateral force—critical for high-access discharge tasks. The modularity allows operators to select the right extension length based on equipment height and field conditions, improving both efficiency and ergonomic handling.

Precision-Engineered Discharge Hook with Integrated Safety Design

At the core of the JINPOWER discharge rod is a robust metallic discharge hook, purpose-built for secure engagement with live or recently de-energized electrical components. The hook is forged from high-conductivity copper alloy or stainless steel, offering both excellent electrical performance and corrosion resistance in outdoor or humid conditions.

Its U-shaped design ensures stable contact with terminals, busbars, or conductor ends, enabling controlled discharge through the internal resistance circuit. The hook is mechanically secured and electrically bonded to the inner core of the rod, ensuring a reliable path to ground in every use.

To enhance safety during operation, the discharge rod features:

• Extended insulated grip section: Designed according to ergonomic hand dimensions, ensuring ample distance from the energized area and minimizing the risk of flashover or accidental touch.
• Plug-in grounding interface: A simplified pin-type connector at the base allows fast and secure grounding cable attachment, with firm locking to prevent disconnection during high-resistance discharge.
• Durable ground clamp: Attached at the cable’s end is a heavy-duty clamp with reinforced spring or bolt mechanism, ensuring firm contact with the earthing point, whether on grounding busbars or rods.

Each of these components is not only optimized for performance but also field-tested for shock protection, handling comfort, and user reliability in unpredictable work environments.

Insulation Performance & Material Durability for High-Voltage Protection

To ensure safe operations across a wide voltage spectrum—from 10kV up to 220kV—the JINPOWER discharge rod adopts multi-layered composite insulation structures based on epoxy resin and fiberglass-reinforced polymer (FRP). This construction guarantees exceptional dielectric strength, mechanical integrity, and long-term reliability under high-voltage exposure.

Key Insulation Attributes:

• High dielectric withstand rating: Each rod is tested to endure voltages 1.5 times higher than its rated level without electrical breakdown, ensuring operational headroom and safety.
• Excellent tracking and arc resistance: The surface is treated with anti-tracking and UV-resistant coatings to prevent surface leakage or flashover, especially in humid or outdoor environments.
• Mechanical rigidity with lightweight handling: The rod’s tubular structure balances stiffness and low weight, making it easy to maneuver even at full extension.

Environmental & Structural Resilience:

• UV and weather resistance: The outer coating withstands prolonged sun exposure and moisture without cracking or degradation.
• Temperature stability: Maintains mechanical and dielectric properties in temperatures ranging from -30°C to +55°C.
• Chemical resistance: The surface resists oil, dust, and corrosive gases, maintaining safety and grip even in industrial zones.

This engineered insulation design is built to outperform common industry benchmarks for composite insulating rods, providing reliable protection for operators in all environmental conditions and across a wide range of voltage applications.

Telescopic Structure & Compact Transport Design

To adapt to diverse field environments and enhance portability, the JINPOWER discharge rod is engineered with a telescopic multi-section structure, offering flexibility in both deployment and storage. Whether you’re working in confined indoor spaces or elevated outdoor switchyards, this extendable rod ensures optimal reach without compromising handling safety.

Key Telescopic Features:

• Multi-section configuration: Available in 2-section, 3-section, and 4-section designs depending on rated voltage—ranging from 1.3m to 3.4m when fully extended.
• Compact retraction: The collapsed length of 65 cm allows for convenient storage in vehicles, toolkits, or carrying cases, even for 220kV-class rods.
• Lock-in-place mechanism: Each section includes a secure friction-lock or latch system that prevents accidental collapse during operation.

Mobility Benefits for Field Use:

• Lightweight yet sturdy: The use of high-strength FRP tubing maintains structural rigidity while keeping the total weight manageable, especially critical for single-operator handling.
• One-person operation: Designed for easy one-handed deployment and adjustment, even when wearing rubber gloves or PPE.
• Quick deployment: Rapid extension and locking allow for faster grounding setup during maintenance or emergency discharges.

This collapsible structure is ideal for substation operators, line inspection crews, and industrial electricians who require mobility without sacrificing safety or performance.

Discharge Hook & Grounding Interface

At the critical moment of discharging high-voltage equipment, the structure and reliability of the hook and grounding connection determine both operational efficiency and user safety. The JINPOWER discharge rod integrates a precision-engineered discharge hook and secure grounding interface, ensuring stable performance across various live-line conditions.

Precision Discharge Hook:

• Material Options: Available in high-purity copper or stainless steel to ensure conductivity and corrosion resistance.
• Hook Shapes: U-shaped, straight, and custom-angle configurations available to fit various terminals—ideal for transformers, busbars, isolators, or switchgear.
• Surface Finish: Polished contact surface for clean electrical transfer and reduced arcing risk during initial contact.
• Reinforced Mounting: Mechanically secured into the rod head with insulated collars to prevent slippage or accidental detachment.

Grounding Interface & Clamp:

• Clamp Design: Comes with spring-loaded or screw-lock ground clamps to fit round, flat, or bus-type grounding bars.
• Connection Type: The base of the rod includes a pin-type or ring-type terminal for quick and secure attachment to ground wires.
• Built-in Anti-detachment Ring: Ensures the ground clamp remains locked even during movement or vibration.

These features work in tandem to guarantee that residual current flows safely and steadily to ground, minimizing risks of recharging or electric shock. Whether you are grounding a 10kV distribution panel or a 220kV transmission bus, the contact points of the discharge rod must be dependable, and JINPOWER ensures that they are.

Insulated Handle & Anti-Slip Grip

Safe operation in high-voltage environments demands absolute control and reliable insulation at the user’s point of contact. JINPOWER discharge rods feature a long insulated handle section with an ergonomic, anti-slip grip, ensuring both electrical protection and operational stability even under challenging conditions.

Extended Insulation Zone:

• Hand Safety Distance: The handle section is designed to exceed minimum hand-to-live-part clearance requirements.
• Dielectric Barrier: Constructed with dual-layer epoxy or FRP insulation for added safety margin—especially effective under wet or humid working conditions.
• Visual Warning Zones: Color-coded warning bands near the top of the handle clearly indicate the safe gripping area and danger zones.

Ergonomic Anti-Slip Grip:

• Textured Surface: Designed with deep-grooved patterns to prevent hand slippage—especially when wearing gloves or working in damp environments.
• Tapered Shape: Gradual widening at the bottom improves leverage and reduces fatigue during extended use.
• Optional Arc Shield Guard: Select models include a removable arc flash guard installed above the grip, offering additional operator protection in close-contact tasks.

This handle design ensures that every movement you make with the discharge rod is safe, secure, and in full control—reducing the likelihood of accidental contact or operator error during grounding procedures.

Electrical Performance & Testing Results

Every JINPOWER discharge rod is engineered to meet stringent electrical safety thresholds and tested under simulated real-world stress conditions. This ensures that the rod performs reliably during critical high-voltage discharge operations—offering consistent protection for both operator and equipment.

Certified Electrical Properties:

• Dielectric Strength: Each rod is tested to withstand voltages up to 1.5 times its rated capacity, ensuring insulation integrity across 10kV to 400kV applications.
• Discharge Resistor Range: Equipped with built-in high-resistance modules (20MΩ to 200MΩ) to control current flow during discharge, minimizing arc generation.
• Leakage Current Control: During testing, leakage current is maintained below 1mA, reducing the risk of unintended shock or system feedback.

Comprehensive Testing Protocols:

• Routine Dielectric Testing: Ensures pole insulation can handle peak electrical stress without breakdown.
• Resistance Verification: Confirms resistor performance stability and proper discharge time curve.
• Impulse and Breakdown Testing: Mimics surge scenarios and flashover risks to validate dielectric resilience.

Real-World Simulation:

Each rod undergoes multi-condition testing for UV exposure, humidity, temperature cycles, and mechanical stress. This guarantees consistent operation in tropical, desert, or industrial climates where unpredictable conditions challenge standard equipment.

By maintaining high thresholds for electrical safety and proving performance through full-scope testing, JINPOWER ensures that each discharge rod meets or exceeds global compliance requirements.

Accessories & Cable Assembly Options

A complete discharge solution extends beyond the rod itself. At JINPOWER, we provide a full selection of grounding cables, clamps, and optional accessories to ensure your discharge rod operates effectively in any high-voltage field environment. Every component is engineered for compatibility, safety, and on-site convenience.

Grounding Cable Specifications:

• Cable Length Options: Standard lengths include 3m, 5m, and 10m, with custom lengths available upon request.
• Conductor Material: High-flexibility multi-strand copper core, coated with PVC, silicone, or XLPE insulation for enhanced safety.
• Cable Diameter: Designed for mechanical strength and minimal voltage drop, typically ranging from 16mm² to 35mm².

Clamp & Lug Configurations:

• Clamp Types:
  • Spring-loaded clamps for quick attachment to grounding bars
  • Screw-lock clamps for stable connection under vibration or movement
  • Magnet-assisted clamps for steel-structured substations
• Cable Termination Options:
  • Assembled with pre-fitted lugs
  • Or shipped with modular terminal kits for field assembly

Additional Accessories:

• Carrying Case: Rugged fabric or hard-shell cases with foam inserts for organized, safe transport.
• Warning Signage: Custom “Grounded – Do Not Operate” signs in multiple languages.
• Arc Shields: Optional arc flash protectors for enhanced personal protection during discharge operations.
• Cable Reels: Available for long-distance deployments or workshop use.

All accessories are quality-tested and designed to integrate seamlessly with JINPOWER discharge rods, providing you with a field-ready toolkit that meets international safety protocols.

Integrated Kits & Complementary Tools

To maximize safety and field efficiency, JINPOWER discharge rods are often deployed as part of comprehensive high-voltage grounding kits. We offer a wide range of compatible accessories and safety tools that integrate seamlessly with our rods, helping technicians execute electrical discharge procedures with confidence.

Complete Discharge Rod Kits

For project-based procurement or fast deployment, we provide turnkey kits that include everything required for safe discharge operations:

• Voltage-rated discharge rod (fixed or telescopic)
• High-resistance module (pre-installed)
• Grounding cable (standard 3m / 5m / 10m, or customized)
• Earth clamp (spring-type, screw-fixed, or magnetic)
• Arc protection shield (optional)
• Carrying case (canvas bag or reinforced hard case)
• Warning tag, signage, and instruction manual

These kits are packaged for utility crews, EPC contractors, and inspection teams, enabling quick setup and consistent safety performance on site.

Recommended Complementary Equipment

To support a complete high-voltage maintenance workflow, we also recommend pairing our discharge rods with the following tools:

All products are designed to meet IEC and national standards, ensuring compatibility and performance across global markets.

OEM & Customization Capabilities

JINPOWER offers full-scale OEM and customization services to meet the unique needs of utility companies, private-label brands, engineering contractors, and equipment integrators. Whether you require non-standard specifications or branded product lines, we deliver flexible manufacturing and design solutions with technical precision and speed.

Voltage Rating & Structural Customization

We support tailor-made discharge rods for various system voltages and field environments:

• Voltage options: 10kV, 35kV, 110kV, 220kV
• Rod lengths: from 1.3m to 3.4m, available in single-piece or telescopic formats
• Telescopic segmentation: two-section or three-section collapsible designs
• Hook configuration: U-shaped hook, universal clamp, or customer-designed heads
• Ground cable assembly: selectable cable type, length, and clamp structure

Every component is modularized to support rapid adaptation to specific maintenance scenarios or regional safety standards.

Branding & Packaging Personalization

We help our global partners build strong visual identity and shelf impact through:

• Private logo printing on discharge rods, handles, and carrying bags
• Customized manuals in English, Spanish, French, Arabic, or other languages
• OEM packaging: reinforced boxes, canvas kits, or foam-insert hard cases
• Barcode and QR code tagging for traceability and inventory integration

This flexibility supports distributors and wholesalers aiming to enter new markets or comply with governmental bid requirements.

Engineering Support for Project Integration

Our technical team collaborates with clients to meet project-level demands, such as:

• Grid modernization or utility standard updates
• Safety audits and tool redesign
• Engineering drawings and data sheets for bid documents
• Compliance reports for local tender submissions

From technical drawings to pre-bundled kits, we ensure you receive a ready-to-deploy product that matches your field conditions and brand objectives.

Certifications & Quality Compliance

To meet global electrical safety requirements and regulatory standards, all JINPOWER discharge rods are engineered, tested, and certified in accordance with internationally recognized specifications. This ensures reliable performance, regulatory compliance, and seamless tender participation in both domestic and international power infrastructure projects.

Factory Testing Protocols

Before shipment, each discharge rod undergoes multi-stage testing in our QC lab, including:

• Dielectric Withstand Test – Simulating system overvoltage at 1.5x rated level
• Discharge Resistance Verification – Ensuring resistive current flow remains within <1mA
• Mechanical Strength Test – Validating torsion, drop impact, and structural integrity
• Humidity & UV Resistance Check – Environmental reliability under field exposure

For high-risk sectors like substation retrofits, transmission upgrades, and railway electrification, these tests guarantee the tool’s durability and stability in critical operations.

Traceability & Documentation

Each product is supplied with a serial number label, batch code, and quality certificate, enabling full traceability throughout its lifecycle. Optional support includes:

• Third-party test reports (SGS, Intertek, or customer-assigned labs)
• Technical data sheets (TDS) and material safety documentation (MSDS)
• Conformance letters for tender or project audit files

With JINPOWER, you receive not just tools—but fully documented, certified solutions ready for regulated environments.

FAQ About Discharge Rods

To support your decision-making and field operation planning, here are the most frequently asked questions about JINPOWER discharge rods—covering product selection, usage, and customization.

Q1: What is the main purpose of a discharge rod in electrical maintenance?

A discharge rod is used to safely eliminate residual or induced voltage from de-energized electrical systems. This prevents arc flash, electric shock, or equipment damage before maintenance or inspection. It is always the first step before installing grounding cables or beginning live-line procedures.

Q2: How do I choose the correct discharge rod model for my voltage system?

Select based on system rated voltage and application scenario. For example:

• 10kV rod → local distribution panels or ring main units (RMUs)
• 35kV → medium-voltage substations
• 110kV and above → high-voltage transmission lines or rail networks

Each rod is clearly marked with a voltage rating and color-coded for quick identification.

Q3: Do JINPOWER discharge rods include grounding cables and clamps?

Yes. We offer both standalone rods and complete kits. Kits can include:

• Discharge rod (fixed or telescopic)
• Ground wire (3–10m) with copper core
• Clamps (spring-loaded, screw-tight, or magnetic)
• Carry bag and optional arc protection

Customization is available to match your local standards or tenders.

Q4: Can I order a collapsible discharge rod for easy transport and storage?

Absolutely. Our telescopic rods come in 2-section and 3-section options, extendable up to 6 meters. These are especially ideal for field crews working in transmission towers or remote substations.

Q5: What are the lead times and minimum order quantities (MOQ)?

• Lead Time: Typically 7–15 working days, depending on quantity and customization
• MOQ: Flexible, starting from 1–10 sets for project trials or tender testing

For bulk orders, we support batch production scheduling and export coordination.

Get Reliable Discharge Rods Tailored to Your Safety Standards

Whether you are sourcing for utility maintenance, EPC tenders, or large-scale infrastructure upgrades, JINPOWER is ready to support your voltage safety needs with precision-manufactured, IEC-compliant discharge rods.

We offer:

• Full voltage coverage from 10kV to 220kV
• Fixed and telescopic designs for all working heights
• OEM & private label solutions for global distributors
• Custom packaging, accessories, and compliance kits
• Fast production and global export delivery

All products undergo strict electrical, mechanical, and environmental testing to ensure they perform reliably in the field—even in the most demanding conditions.

Don’t compromise on safety. Partner with a manufacturer that understands the critical importance of live-line protection and has delivered to over 40 countries worldwide.

Contact Our Team to Request a Quotation or Technical Consultation

• Get your sample kit or custom quote in 24–48 hours
• Multilingual technical support available
• Engineering guidance for voltage matching and installation requirements

Let’s make your high-voltage operations safer—together.