Electric slip ring DHS350T-4

for heavy-duty applicationsfor cranesfor industrial applications

Short Description

• DHS350T-4 high-current slip ring for excavators
• 540A 4-circuit architecture — three main circuits at 540A and one auxiliary circuit at 200A; supports AC 0–400V and DC 240V for hydraulic pump motors and electric drive systems.
• Continuous 360° rotation without cable failure — enables wireless rotation with dynamic resistance variation ≤10 mΩ for spark-free, stable transmission.
• IP65 protection for harsh environments — dust-, water- and oil-resistant; rated for 0–300 RPM and -20°C to +80°C operation.
• Q235A steel housing with precious-metal contacts — designed to resist vibration, impact and corrosion; insulation resistance ≥1000 MΩ and dielectric strength 1500 VAC.

Product Detail
Purpose-Built for Excavator Wireless Rotation
Ingiant’s DHS350T-4 slip ring is engineered as the rotary conductive interface between the stationary undercarriage and the rotating upper structure of excavators. It provides a continuous electrical bridge for high-power supply and control signals, eliminating cable tangling, tearing and unexpected power interruptions, and addressing electrification needs for electric excavators and heavy construction machinery.

540A High-Current Architecture for Electric Drive Systems
The unit features a 4-circuit configuration: three main circuits rated at 540A each and one auxiliary circuit at 200A. It supports AC 0–400V and DC 240V. Power and signal circuits are isolated to prevent electromagnetic interference, ensuring reliable simultaneous transmission of high power and control signals.

Built to Survive the Harshest Job Sites
Designed for heavy dust, mud flushing, high-pressure cleaning, hydraulic oil exposure, high vibration and impact. The Q235A structural steel housing and spring pre-tension brush system withstand up to 10g vibration and impact. Precious metal contacts deliver wear and oxidation resistance with dynamic resistance variation ≤10 mΩ to prevent sparking and intermittent disconnection. The IP65 enclosure resists dust, water jets and oil ingress and operates reliably up to 300 RPM between -20°C and +80°C.

Superior Electrical Safety & Insulation
Engineered for operator safety and equipment protection: insulation resistance ≥1000 MΩ and dielectric strength 1500 VAC to minimize leakage and short-circuit risk under prolonged high-load operation.

Ideal Choice for Construction Machinery Electrification
Applications and target users include:

• Electric excavator manufacturers — powering hydraulic pump motors and drive systems
• Excavator electrification retrofit projects — replacing cable-prone wiring with a maintenance-free rotary interface
• Crane and heavy machinery OEMs — integrating high-current power and control signal transmission
• Mining, infrastructure and port operators — requiring 24/7 reliability in extreme conditions

Customization available
Circuit count, per-ring current rating, voltage class, cable length, connector types and mounting dimensions can be tailored to specific excavator electrical architectures.

Technical Parameters (table)
Parameter | Specification
Circuits | 4 (3 × 540A main + 1 × 200A auxiliary)
Rated Current | 540A × 3 / 200A × 1
Voltage | AC 0–400V / DC 240V
Dynamic Resistance Variation | ≤10 mΩ
Insulation Resistance | ≥1000 MΩ
Dielectric Strength | 1500 VAC
Rotational Speed | 0–300 RPM
Protection Rating | IP65 (dust, water, oil resistant)
Operating Temperature | -20°C to +80°C
Housing Material | Q235A high-strength structural steel
Contact Material | Precious metal alloy
Applications | Excavators, cranes, construction machinery electrification

Characteristics / Technical specifications

• Model name: DHS350T-4
• Brand: Ingiant
• Circuits: 4 (3 main 540A + 1 auxiliary 200A)
• Rated current: 540A × 3, 200A × 1
• Supported voltage: AC 0–400V, DC 240V
• Dynamic resistance variation: ≤10 mΩ
• Insulation resistance: ≥1000 MΩ
• Dielectric strength: 1500 VAC
• Rotational speed: 0–300 RPM
• Protection rating: IP65
• Operating temperature range: -20°C to +80°C
• Housing material: Q235A high-strength structural steel
• Contact material: Precious metal alloy
• Primary applications: Excavators, cranes, construction machinery electrification