Product Description
Built to IEC (International Electrotechnical Commission) 60309-1 and 60309-2 standards, the KUPO KHTN0331 is a 63A CEE form plug (inline male) rated for 220-250V operation with 3-pole (2P+E) configuration. The CE-marked design features a flame-retardant PA6 (Polyamide 6) Nylon housing, nickel-plated brass contacts, and IP67 (Ingress Protection 67) watertight protection. The keyed earth contact at the 6-hour clock position and earth-first/earth-last engagement sequence ensure safe, foolproof connections across industrial, commercial, and entertainment applications.
Key Features
- Protective earth engages first and releases last, ensuring the ground path is established before live contacts connect
- Keyed earth contact at the 6-hour clock position prevents cross-mating with incompatible voltage systems
- IP67 watertight housing withstands temporary immersion up to 1 meter and complete dust ingress for harsh outdoor and wet environments
- Rugged screw-type coupling maximizes mechanical strength and sealing integrity for stable performance in demanding conditions
- Flame-retardant PA6 (Polyamide 6) Nylon housing provides high impact resistance, electrical insulation, and self-extinguishing properties
- Nickel-plated brass contacts deliver corrosion resistance and reliable low-resistance connections at sustained 63A loads
- All terminal screws face the same direction for faster, more intuitive wiring
- Anti-loosening fin structure maintains a secure connection even under vibration
- Blue-coded housing identifies the 220-250V voltage class per international IEC 60309 color convention
- Rated for operation from -25 to 40 degrees Celsius
Certifications & Standards
- CE Marked: Low Voltage Directive 2014/35/EU
- IEC/EN 60309-1: 1999 +A1:2007 +A2:2012. General requirements for industrial plugs, socket-outlets and couplers
- IEC/EN 60309-2: 1999 +A1:2007 +A2:2012. Dimensional compatibility requirements for pin and contact-tube accessories
- RoHS Compliant: Directive 2011/65/EU and (EU)2015/863
- REACH Compliant: Regulation No 1907/2006, Article 33(1) Obligation
- IP67 Watertight
Applications
- Temporary and permanent power distribution on construction sites
- General-purpose single-phase industrial and commercial power
- Shore power for boats and marinas
- Heavy industrial main distribution feeds and generator connections
- Site main incomers and primary power infrastructure
- Cable assemblies, extension leads, and portable equipment connections
- Entertainment and live event production
Compatibility
The KUPO KHTN0331 is manufactured to IEC 60309-1 and IEC 60309-2 standards, ensuring dimensional compatibility with CEE form connectors from all compliant manufacturers. The 6-hour clock position earth contact permits mating only with connectors of the same 220-250V voltage class, preventing cross-connections between incompatible electrical systems.
Voltage Color Convention
CEE form connectors use internationally standardized housing colors to indicate voltage class: Yellow for 110-130V, Blue for 200-250V, Red for 380-480V, and Black for 500-690V. The keyed clock position of the earth contact prevents cross-mating between different voltage systems, ensuring only compatible connectors can be joined. Always verify voltage and frequency compatibility with local electrical supply before installation.
Frequently Asked Questions
What are the key features and ratings of the KUPO KHTN0331?
The KUPO KHTN0331 is a 63A CEE form plug (inline male) built to IEC (International Electrotechnical Commission) 60309-1 and 60309-2 standards for 220-250V single-phase power distribution. It features a 3-pole (2P+E) configuration that carries one live conductor, one neutral conductor, and one protective earth conductor. The flame-retardant PA6 (Polyamide 6) Nylon housing with nickel-plated brass contacts accepts cables from 6-25 mmsq. The IP44-rated housing measures 165 mm overall with a body diameter of 85 mm.
What built-in safety features does the KUPO KHTN0331 provide?
As an inline male plug carrying 63A at 220-250V, the KHTN0331 incorporates multiple layers of protection for safe field use. The keyed earth contact at the 6h clock position physically prevents cross-mating with connectors from incompatible voltage systems. The protective earth on this 3-pole (2P+E) connector always engages first and releases last, ensuring the ground path is established before any of the 2 remaining contacts connect. The IP44 (Ingress Protection 44) splash-proof rating protects this inline plug against water splashes and solid objects larger than 1mm during portable field use.
What determines the mating compatibility of the KHTN0331?
The KUPO KHTN0331 is manufactured to IEC 60309-1 and IEC 60309-2 dimensional standards, ensuring full interoperability with CEE form connectors from all compliant manufacturers worldwide. To mate correctly, both connectors must share the same amperage rating (63A), voltage class (220-250V), pole configuration (3-pole (2P+E)), and earth contact clock position (6h). The clock position keying acts as a mechanical interlock: a 220-250V connector with a 6h earth position cannot physically engage with a connector keyed to a different clock position, preventing dangerous cross-connections between incompatible electrical systems.
How do you open and wire the KUPO KHTN0331 for cable assembly?
Open the bayonet twist-lock housing by rotating it counterclockwise, strip the cable conductors to the required length, insert each conductor into its corresponding terminal and tighten the terminal screws. All screws face the same direction for faster, more intuitive wiring. Close the housing by pressing and rotating clockwise until the bayonet locks engage. The KHTN0331 accepts cables from 6-25 mmsq through a 20 mm cable entry opening. The overall body length is 165 mm with a body diameter of 85 mm. The IP44 protection is maintained when the housing is properly closed and the cable gland is correctly tightened.
In what environments and industries is the KUPO KHTN0331 commonly used?
As a heavy-duty single-phase plug, the KHTN0331 serves main power feeds, industrial switchgear inputs, large motor drives, heavy machinery connections, and large-scale temporary event power distribution. As an inline plug, it is used in cable assemblies, extension leads, and portable equipment connections for general-purpose industrial and commercial power, lighting circuits, workstation feeds, shore power for boats and marinas, and portable equipment connections.