The High-Voltage (HV) Cable Extension product line manufactured by Reckmann GmbH (Germany) represents a specialized, safety-critical instrumentation suite designed to address electrical insulation hazards and signal degradation across electric vehicle battery development (EV Battery R&D), electric powertrain test cells, and grid-scale Battery Energy Storage Systems (BESS). When instrumenting high-voltage battery modules and battery packs carrying total operational potentials of several hundred or thousand Volts (400V - 800V - 1000V DC), conventional sensor extension lines expose sensitive Data Acquisition (DAQ) front-ends to dielectric flashovers and present severe shock hazards to test operators. Reckmann High-Voltage Cable Extensions deliver an impenetrable dielectric barrier, ensuring galvanic safety while preserving absolute temperature signal integrity.

The series is partitioned into three application-optimized configurations:
1. Robust HV TC Cable Extension Ø6.1: A heavy-duty, reinforced thermocouple extension cable engineered with a substantial outer diameter of Ø6.1 mm. Equipped with a ruggedized multi-layer polymer jacket, it provides superior resistance against mechanical abrasion, edge pinching, industrial fluids, and crush forces. This model is exceptionally suited for battery pack crash test facilities, mechanical shaker tables, and test cell floors where cables endure aggressive handling and repetitive mechanical strain.
2. HV TC Cable Extension Ø4.5: A streamlined, lightweight high-voltage thermocouple extension cable with a compact outer diameter of just Ø4.5 mm. Its high flexibility enables test technicians to route sensor leads through densely packed battery cell modules, tightly sealed battery enclosures, and congested wire harnesses without introducing mechanical stress to fragile sensor junctions.
3. HV RTD Cable Extension Ø4.5: Purpose-engineered for Resistance Temperature Detectors (Pt100 / Pt1000 3-wire or 4-wire configurations) operating in high-voltage fields. Because RTD sensors convey temperature through minute fractional resistance differentials, this cable features a high-density tinned copper braided shield (EMI shielding). This completely rejects electromagnetic interference induced by rapid pulse-width modulation (PWM) switching transients from traction motor inverters, guaranteeing stable and precise temperature readings down to fractions of a degree Celsius.

All cable variants are terminated with specialized touch-proof / finger-safe connectors compliant with IEC/EN 61010 high-voltage test safety directives. The high-performance dielectric insulation materials undergo stringent withstand testing up to several kilovolts (kV), ensuring flawless operational security and long-term signal dependability in mission-critical test environments.

• Manufacturer: Reckmann GmbH
• Country of Origin: Germany
• Product Models Covered:
  - Robust HV TC Cable Extension Ø6.1 (Reinforced heavy-duty high-voltage thermocouple extension cable Ø6.1 mm)
  - HV TC Cable Extension Ø4.5 (Flexible lightweight high-voltage thermocouple extension cable Ø4.5 mm)
  - HV RTD Cable Extension Ø4.5 (High-voltage shielded RTD extension cable with EMI protection Ø4.5 mm)
• Compatible Sensor Types:
  - TC Models: Type K (NiCr-Ni), Type T (Cu-CuNi), or Type J thermocouples per IEC 60584
  - RTD Model: Pt100 / Pt1000 RTD sensors (3-wire or 4-wire topology) per DIN EN 60751
• Dielectric Breakdown Test Voltage: High-voltage tested from 3.0 kV AC/DC up to 6.0 kV AC/DC
• Nominal Operating Voltage: Up to 1000V DC / 1500V DC (Optimized for 800V+ modern EV architectures)
• Outer Cable Diameter:
  - Robust HV TC: Ø6.1 mm (Heavy-duty crush and abrasion-resistant outer jacket)
  - HV TC & HV RTD: Ø4.5 mm (High-flexibility compact design)
• Insulation & Sheath Materials: High-dielectric Silicone, Fluoropolymer (FEP/PTFE), or specialized TPE elastomer
• Electromagnetic Shielding (For HV RTD Model): High-coverage tinned copper wire braided shield (EMI/RFI rejection)
• Continuous Operating Temperature Range: -40°C to +180°C (Short-term peak tolerance up to +200°C)
• Connector Termination: Touch-proof, finger-safe miniature TC / RTD connectors per IEC/EN 61010 safety standards
• Standard Available Lengths: 1.0 m, 2.0 m, 3.0 m, 5.0 m, 10.0 m (Custom lengths fabricated upon project specification)
• Mechanical & Environmental Durability: Continuous flex resistance, resistant to automotive oils, glycol coolants, and solvents