IEC 60204-32:2023

Overview

IEC 60204-32:2023 - Safety of machinery - Electrical equipment of machines - Part 32 - specifies electrical requirements for hoisting machines (cranes, winches, storage/retrieval machines and related equipment). The standard applies to electrical, electronic and programmable equipment starting at the point of supply connection (the crane-supply-switch) and includes feeders outside the machine (flexible cables, conductor wires or bars). It covers systems up to 1 000 V AC or 1 500 V DC and nominal frequencies not exceeding 200 Hz. This third edition (2023) replaces the 2008 edition and aligns key topics with IEC 60204-1.

Key topics and technical requirements

The standard focuses on electrical safety and functional integrity of hoisting machines. Major technical topics include:

• Scope of equipment: overhead travelling cranes, mobile cranes, tower cranes, gantry/offshore/floating cranes, winches, hoists, loader and cable cranes, RTGs, monorail hoists, storage and retrieval machines, straddle carriers, load-holding devices.
• Point of supply and feeders: requirements starting from the crane-supply-switch and including external feeders and conductor systems.
• Protection against electric shock: basic and fault protection, PELV where applicable, and residual voltage control.
• Equipotential bonding and protective bonding circuits: earthing, bonding continuity and protective conductor requirements.
• Overcurrent and motor protection: circuit protection for supply, power and control circuits; motor overload/overspeed protections.
• Control systems and functions: start/stop categories, emergency stop, interlocks, operating modes, and measures to minimise risks from failures.
• Power Drive Systems (PDS): consideration of PDS, safe torque off, and control circuit protection.
• Cableless control systems (CCS): requirements and safety considerations for radio or wireless controls.
• Electromagnetic compatibility (EMC): EMC requirements for reliable operation and reduced interference.
• Documentation and technical files: updated technical documentation requirements for design, installation, maintenance and compliance.
• Special conditions: additional requirements where machines handle explosive/flammable materials or are used in mines.

Practical applications and users

IEC 60204-32 is intended for:

• Crane and hoist manufacturers (OEMs)
• Design and electrical engineers specifying hoisting machine systems
• System integrators and control-system suppliers (including PDS and CCS vendors)
• Maintenance teams, safety engineers and plant operators
• Certification bodies and compliance assessors

Applying this standard improves electrical safety, reduces downtime from electrical faults, and supports compliance during installation, commissioning and inspections.

Related standards

• IEC 60204-1 (Safety of machinery - Electrical equipment of machines - General requirements) - alignment for general electrical safety principles
• IEC 60439 series (switchgear selection and erection) - referenced for switchgear considerations

Keywords: IEC 60204-32, hoisting machines, crane electrical safety, cableless control systems, PDS, earthing and bonding, EMC, motor protection, technical documentation.