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Solution Overview

Spider Crane Solutions for Substation and Confined-Space Lifting

Onchtech spider crane solution for substation construction and confined-space lifting combines compact access, remote precision control, stable support, and ground protection.

Control and Safety
Wireless Remote Control / Moment Limiter / Anti-Overwinding Device
Applications
Substation Construction / Power Facility Upgrades / Confined-Space Lifting
Recommended Machine Weight
1.3-6.7 T
Recommended Equipment
1.2T / 5T Crawler Spider Cranes
Outrigger Support
Four Independently Controlled Hydraulic Outriggers
Recommended Lifting Capacity
1.2-5 T
Max. Lift Height
6.3-17 m
Minimum Machine Width
0.65 m
Max. Operating Radius
5.35-15 m

Solution Highlights

Compact access, independent outrigger support, remote precision control, and lifting safety monitoring

Confined-Space Access

Compact folded body, narrow doorways, dense equipment corridors

Stable Ground Support

Independent hydraulic outriggers, uneven ground leveling, restricted-space setup

Remote Precision Control

Wireless operation, electro-hydraulic proportional valves, smooth equipment positioning

Lifting Safety Monitoring

Moment limiter, anti-overwinding protection, three-color warning lights

Onchtech Spider Crane Solution

Safe and Precise Lifting for Power Facilities and Confined Substations

The Onchtech crawler spider crane solution is designed for power facility construction, substation upgrades and high-risk lifting in confined spaces. It combines a compact tracked chassis, independently controlled outriggers, wireless operation and proportional hydraulic control to support stable access and precise load positioning around sensitive electrical equipment.

Lifting Challenges in Power Facilities

Power grid construction, substation expansion and high-voltage transmission maintenance frequently take place in environments where conventional mobile cranes cannot operate effectively. Narrow entrances, densely arranged transformers and switchgear, cable trenches, finished floors and nearby energized equipment create simultaneous constraints on access, ground loading, equipment stability and load control.

Restricted Equipment Access

Large truck cranes have wide bodies and large turning radii. They may be unable to pass through substation doors, navigate indoor aisles or reach equipment positioned behind existing electrical infrastructure.

Critical Electrical Clearances

Lifting near energized conductors requires controlled boom movement and strict compliance with project-specific electrical clearances. Load swing or abrupt crane motion can increase operational risk and interrupt installation accuracy.

Limited Ground-Bearing Capacity

Indoor epoxy floors and cable-trench covers can be vulnerable to concentrated loads, while unpaved tower sites may be soft, muddy or uneven. Heavy wheeled equipment may damage surfaces or lose mobility.

Solution Definition

A substation spider crane solution is a compact lifting system that uses a crawler chassis and extendable hydraulic outriggers to access constrained work areas, establish a stable lifting footprint and position electrical equipment under controlled movement. The solution is intended for applications in which conventional crane size, turning radius or ground pressure would restrict safe and efficient operation.

Core Solution Logic

Onchtech addresses confined-space lifting through four connected capabilities: access, stabilization, controlled positioning and active safety monitoring. Equipment selection and outrigger planning are then matched to the load, working radius, lifting height, ground conditions and electrical restrictions of the project.

  1. 01. Access A compact folded profile and crawler mobility help the crane pass through narrow entrances and move within dense equipment layouts.
  2. 02. Stabilize Four independently controlled hydraulic outriggers create a suitable support geometry around obstacles and on uneven terrain.
  3. 03. Position Wireless remote control and electro-hydraulic proportional valves enable the operator to manage lifting motion from a location with clearer visibility.
  4. 04. Monitor Load-moment control, anti-overwinding protection and visual warning devices provide operating-status information throughout the lift.

Key Capability Modules

Compact Chassis and Flexible Outriggers

The 1.2-ton model has a minimum folded width of 0.65 m, supporting entry through narrow doors and equipment passages where conventional cranes cannot travel.

  • Crawler-based movement in constrained work areas
  • Four independently controlled hydraulic outriggers
  • Flexible support placement around fixed infrastructure

Remote and Proportional Control

A high-precision wireless remote allows the operator to select a position with direct visibility of the load, landing point and surrounding electrical equipment.

  • Fine movement for controlled load placement
  • Reduced dependence on a fixed operator position
  • Better coordination between the operator and installation team

Low Ground Pressure and Traction

Wide engineering rubber tracks distribute machine weight across a larger contact area and provide traction on variable terrain.

  • Suitable for finished indoor surfaces when ground conditions are verified
  • Improved mobility on soft or muddy outdoor sites
  • Reduced concentrated wheel loading compared with heavy wheeled cranes

Integrated Safety Monitoring

The crane configuration combines operational monitoring and warning functions to support disciplined lifting near sensitive infrastructure.

  • Load-moment limiter
  • Three-color safety warning light
  • Anti-overwinding device
  • Real-time load and operating-condition monitoring

Application Scenarios

Substation Expansion

Installation and replacement of transformers, switchgear and supporting components within existing substations.

Indoor Equipment Placement

Lifting through narrow entrances and positioning equipment in rooms with limited aisle width and overhead clearance.

Transmission-Site Work

Outdoor lifting near high-voltage towers and utility structures on unpaved, uneven or restricted-access ground.

Maintenance and Replacement

Controlled removal and installation of components where surrounding equipment must remain protected from contact and impact.

Recommended Equipment Configuration

The appropriate spider crane should be selected according to the verified load chart, required working radius, lifting height, access dimensions, support footprint and ground-bearing capacity. The following two configurations address common indoor and outdoor power-engineering requirements.

Indoor Compact Model

1.2-Ton Crawler Spider Crane

With a folded width of 0.65 m and a machine weight of 1.3 tons, this model is intended for indoor transformer handling, substation maintenance and lifting in narrow equipment passages.

Heavy-Duty Power Model

5-Ton Crawler Spider Crane

With a maximum lifting height of 17 m and a maximum operating radius of 15 m, this model is suited to outdoor high-voltage tower work and heavier electrical equipment handling.

Core Product Parameters
Core Parameter 1.2-Ton Spider Crane 5-Ton Spider Crane
Maximum Rated Load 1.2 tons 5.0 tons
Maximum Lifting Height 6.3 m 17.0 m
Maximum Operating Radius 5.35 m 15.0 m
Folded Dimensions 2.48 × 0.65 × 1.50 m 4.70 × 1.50 × 2.25 m
Machine Weight 1.3 tons 6.7 tons
Maximum Outrigger Spread 3580 mm long × 3380 mm front/rear 5800 mm long × 5600 mm front × 4900 mm rear
Power System Honda (Koop, Briggs & Stratton (customizable)) Yuchai (Xinchai, Yanmar, Deutz (customizable))
Safety and Control Load-moment limiter, wireless remote, optional fly jib or work platform Two-speed winch, load-moment limiter, wireless remote, optional elevated work platform

Operational Value

For power contractors, utility operators and equipment installation teams, the Onchtech spider crane solution provides a practical way to align crane capability with constrained-site requirements.

Improved Site Accessibility

Compact transport dimensions reduce the access limitations associated with full-size mobile cranes.

Controlled Installation

Remote operation and proportional hydraulic control support smoother placement of transformers and other precision equipment.

Adaptable Stabilization

Independent outriggers allow the lifting footprint to be planned around obstacles and variable site geometry.

Lower Surface Impact

Rubber crawler tracks distribute machine loading and support mobility across indoor and outdoor working surfaces.

Manufacturing and Service Support

Hunan Hongchang Machinery Co., Ltd. integrates complete-machine manufacturing, engineering machinery attachments, structural components and OEM, ODM and OBM cooperation. Under the Onchtech brand, the company supplies crawler spider cranes and related engineering equipment to global markets, including Europe, South America and Southeast Asia.

  • OEM, ODM and OBM configuration support
  • MOQ from one unit
  • Typical delivery period of 30–45 days
  • Global direct shipment from local production
  • Original spare-parts supply
  • Remote technical support
  • CE and ISO 9001 certification
  • Service coverage across more than 20 countries and regions

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