Introduction: One Cable Family, Every Festoon Function

BiTcrane® (N)3GRD5G is not one cable—it is an entire festoon cable system. With over 40 standard configurations spanning four distinct product families—single-core power, multi-core control, three-phase motor power, and paired signal cables—BiTcrane provides every cable type needed to build a complete crane festoon electrical system from a single manufacturer, a single specification, a single rubber compound system, and a single 240 m/min speed rating.

This breadth of range is BiTcrane’s defining advantage. When a crane manufacturer or festoon system integrator specifies a festoon cable system, they need multiple cable types: single-core cables for per-phase power distribution to large hoist and traverse motors; multi-core cables for control, interlock, and distribution circuits; three-phase cables with integrated earth for smaller motor drives; and paired cables for encoder feedback, sensor signals, and communication bus circuits. If these cables come from different manufacturers or different product families, they may have different mechanical properties, different bending radii, different speed ratings, and different rubber compounds—creating compatibility issues when they are installed side by side in the same festoon trolley system.

BiTcrane eliminates this problem entirely. Every configuration uses the same HEPR insulation, GM1b rubber inner sheath, and 5GM5 rubber outer sheath. Every configuration operates at the same 240 m/min festoon speed. Every configuration achieves the same 4× OD static and 5× OD dynamic bending radius. Every configuration is engineered for the same unidirectional bending characteristic optimised for festoon trolley sheaves. A crane manufacturer can specify the entire festoon cable set from Feichun’s BiTcrane range with absolute confidence that all cables will operate compatibly in the same festoon system.

Technical Anatomy: Full Specification Breakdown

Family A — Single-Core Power: 1×25 to 1×185

Single-core festoon cables are used when each phase of a three-phase motor circuit is routed as a separate cable through the festoon system. This per-phase approach is preferred for large motors (above approximately 100 kW) where the conductor cross-section required per phase exceeds what can be practically manufactured in a multi-core festoon cable. Three single-core BiTcrane cables—one per phase—plus a fourth for earth, provide the complete motor power circuit.

The 1×185 mm² configuration at 533 A represents the highest current capacity of any single festoon cable in the Feichun range—sufficient for crane drive motors up to approximately 350 kW at 400 V or 600 kW at 690 V. Three 1×185 cables plus one 1×95 or 1×120 earth cable provide the complete power circuit for the largest crane drives in industrial service.

Family B — Multi-Core Control: 4G2.5 to 36×2.5

Multi-core BiTcrane cables carry control signals, interlock circuits, distribution power for smaller loads, and general-purpose electrical functions through the festoon system. The “G” designation indicates the cable includes a protective earth (PE) conductor; the “×” designation (without G) indicates no dedicated PE.

Family C — Three-Phase Motor Power: 3×25+3G16/3 to 3×70+3G35/3

Three-phase configurations with integrated split-earth conductors provide complete motor power circuits in a single cable. The “/3” designation indicates the earth conductor is split into three concentric elements positioned in the outer interstices—the same split-earth interstices geometry used in the Feichun RHEYFIRM and POLYFLEX MINE mining cable ranges, ensuring perfect cable roundness for smooth festoon trolley transit.

These three-phase configurations serve crane motors from approximately 30 kW (3×25 at 400 V) to approximately 150 kW (3×70 at 400 V)—covering the hoist, traverse, and bridge drives on the majority of industrial overhead cranes, gantry cranes, and port equipment. For larger motors, use Family A single-core cables with separate phase routing.

Family D — Paired Signal: 3×(2×1)C to 12×(2×1)C

Paired (twisted-pair) BiTcrane cables carry balanced signal circuits: encoder feedback, thermocouple temperature sensors, 4–20 mA analogue sensors, RS-485 communication bus, and other signals that benefit from the common-mode noise rejection provided by twisted-pair geometry. The “(2×1)C” notation indicates twisted pairs of 2×1.0 mm² conductors; “(2×1.5)C” indicates pairs of 2×1.5 mm².

A 12×(2×1)C cable provides 12 independent twisted pairs—sufficient for multiple encoder channels, multiple temperature sensors, anti-collision system communication, and load cell signals, all through a single festoon cable with inherent balanced-pair noise rejection.

Why Unscreened: When EMC Screening Is Not Required

BiTcrane (N)3GRD5G is deliberately unscreened—and this is an engineering advantage, not a limitation, for the majority of festoon cable applications. EMC screening adds significant cost (the tinned copper braid material alone represents 15–25% of the cable’s total cost), reduces cable flexibility (the braid adds a semi-rigid layer that increases bending stiffness), increases cable diameter (the braid and its synthetic fibre overlay add 2–4 mm to OD), and increases cable weight (copper braid adds 200–500 g/m depending on cable size).

For applications where EMC screening is not required, specifying a screened cable is wasteful. And the majority of festoon cable applications do not require screening. Specifically, BiTcrane unscreened cables are the correct choice when the crane uses contactor-driven motors (which generate minimal EMI), when the crane’s VFD drives are located in the fixed electrical room (not on the moving crane structure, so the VFD output cables do not travel through the festoon), when the sensitive signal circuits have their own dedicated screened cables (e.g., a Rheyfestoon for encoder signals alongside BiTcrane for power and general control), or when the application is a conveyor or material handling system where EMC requirements are less stringent than crane systems.

By selecting BiTcrane unscreened cables for power and general control functions—and screened cables only for the specific circuits that require screening—the total festoon cable system cost is optimised: screening investment goes precisely where it is needed, and the remaining circuits benefit from the lower cost, greater flexibility, and smaller diameter of unscreened construction.

Also for Drag Chains and Conveyors: Beyond Festoon

Unlike the Rheyfestoon and RONDOFLEX cables that are exclusively festoon products, BiTcrane (N)3GRD5G is explicitly rated for drag chains and conveyor facilities in addition to festoon trolley systems. The cable’s unidirectional bending optimisation applies equally to drag chain operation (where the cable bends in one direction as the chain articulates) and to conveyor-mounted festoon systems (where cables travel with conveyor structures).

This multi-application versatility makes BiTcrane the most broadly applicable festoon-grade cable in the Feichun catalogue. A single cable specification can serve the festoon system on a crane, the drag chain on an automated material handling system, and the conveyor-mounted cable management on a processing line—simplifying procurement and reducing inventory complexity for facilities that operate all three types of equipment.

Real-World Applications

Complete Crane Festoon Systems

A typical medium-duty overhead crane festoon system uses: 3× BiTcrane 1×70 (hoist motor phases, 279 A each), 1× BiTcrane 1×50 (hoist earth, 216 A), 1× BiTcrane 3×25+3G16/3 (traverse motor, 131 A), 1× BiTcrane 5G6 (auxiliary power: brakes, lighting, 53 A), 1× BiTcrane 18G1.5 (control and interlock, 23 A per core), 1× BiTcrane 6×(2×1)C (encoder and sensor signals). Seven cables, one product family, one specification, one supplier.

Steel Mill Process Cranes

Ladle cranes and charging cranes require the heaviest festoon power cables—BiTcrane 1×150 or 1×185 for hoist motors rated 200–350 kW. The 5GM5 neoprene outer sheath withstands the heat radiation, metal dust, and aggressive atmosphere of steelmaking environments.

Automated Port Equipment

RMG cranes, ship loaders, and bulk conveyors use BiTcrane three-phase and multi-core configurations for non-VFD-output circuits: transformer supply, lighting distribution, heating, and general control functions. VFD motor output circuits use screened RONDOFLEX (C)-FC.

Conveyor Systems and Material Handling

Mining conveyors, aggregate processing lines, grain handling systems, and automotive manufacturing conveyors use BiTcrane for drive power and control distribution through cable trolley systems mounted on the conveyor structure. The 240 m/min speed rating exceeds the travel speed of any industrial conveyor, ensuring compatibility with the fastest material handling systems.

Cost-Effective Alternative

BiTcrane is the highest-volume festoon cable in the Feichun range—its broad configuration matrix means that Feichun produces these cables in large quantities with optimised manufacturing efficiency.

Feichun Lead Times: 3–6 weeks for standard configurations. All 40+ configurations available. European equivalent: 8–16 weeks.

Feichun Pricing: Klaus Faber BiTcrane 5G10 quoted at €5.80–7.50/meter; Feichun equivalent: €2.90–4.20/meter. For a complete crane festoon cable set (7 cables × 300 m average = 2,100 m): savings of €4,200–€6,930 per crane.

Technical FAQ

Can BiTcrane be used on VFD motor output circuits?

BiTcrane’s 2.5 kV test voltage is adequate for 400 V VFD systems with cable lengths under 25 metres (where reflected-wave peak voltage stays below approximately 1,200 V). For 690 V VFD systems or 400 V systems with cable lengths exceeding 25 metres, use RONDOFLEX (C)-FC with its 5 kV test voltage and semi-conductive stress-control insulation. BiTcrane is not recommended for VFD motor output circuits in general—it is designed primarily for contactor-switched power, control, and signal circuits.

Why does the three-phase configuration use split earth (“/3”) while the multi-core uses standard earth (“G”)?

Three-phase configurations carry significantly higher fault currents that require equalised earth return paths—the split-earth interstices design provides this. Multi-core configurations carry lower currents where a single earth conductor provides adequate fault protection. The “/3” split-earth design also maintains the cable’s round cross-section, which is important for the larger three-phase cables that experience higher radial forces in the festoon trolley system.

What is the maximum festoon span length for BiTcrane?

Maximum festoon span depends on cable weight, trolley spacing, and acceptable catenary sag. For the 1×185 cable (1,968 kg/km), typical trolley spacing is 2.5–4 metres with acceptable sag of 150–300 mm. For lighter cables (5G1.5 at 245 kg/km), trolley spacing can extend to 4–6 metres. Feichun provides festoon span calculation tools and trolley spacing recommendations for each configuration on request.

Can Feichun supply additional configurations beyond the standard 40+?

Yes. Feichun manufactures custom BiTcrane-equivalent configurations including non-standard core counts, non-standard cross-sections, composite power+control cables, and configurations with additional features (overall foil screen, drain wire, special core identification). Custom configurations: 6–10 week lead time.