Product Description
Overview
Built to IEC (International Electrotechnical Commission) 60309-1 and 60309-2 standards, the KUPO KHTN725 is a 32 A CEE form plug (inline male) rated for 380-415 V operation with a 5-pole (3P+N+E) configuration and an integrated phase inverter. The CE-marked design features a flame-retardant PA6 (Polyamide 6) nylon housing, nickel-plated brass contacts, and IP44 (Ingress Protection 44) splash-proof protection. The keyed earth contact at the 6-hour clock position and earth-first/earth-last engagement sequence support safe, correctly matched connections, while the inverter mechanism allows qualified personnel to correct phase rotation without reterminating the cable conductors.
Key Features
- Integrated phase-inverter mechanism allows qualified personnel to correct phase rotation without opening the plug and moving the terminated conductors
- 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
- IP44 splash-proof housing provides protection against splashing water and solid objects larger than 1 mm
- Tool-free bayonet twist-lock housing enables fast open/close access for wiring on busy jobsites
- 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 32 A loads
- All terminal screws face the same direction for faster, more intuitive wiring
- Anti-loosening fin structure maintains a secure connection even under vibration
- Red-coded housing identifies the 380-415 V voltage class per international IEC 60309 color convention
- Rated for operation from -25 to 40 °C
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; IP44 splash-proof. Match standards and compliance requirements to the local electrical code before installation.
Applications
Suitable for temporary and permanent power distribution on construction sites, three-phase heavy machinery and motor drives, HVAC (Heating, Ventilation, and Air Conditioning) systems, welding equipment, pump stations, medium industrial equipment, catering and festival power, cable assemblies, extension leads, portable equipment connections, and entertainment production. The phase inverter is particularly useful when direction-sensitive equipment moves between venues or supply points with different incoming phase sequences.
Compatibility
The KUPO KHTN725 is manufactured to IEC 60309-1 and IEC 60309-2 standards, ensuring dimensional compatibility with CEE form connectors from compliant manufacturers. The mating device must share the same 32 A rating, 380-415 V voltage class, 5-pole (3P+N+E) configuration, and 6-hour earth-contact position. The phase inverter changes phase sequence only; it does not change voltage, current rating, pole configuration, or mechanical keying.
Voltage Color Convention
CEE form connectors use internationally standardized housing colors to indicate voltage class: Yellow for 110-130 V, Blue for 200-250 V, Red for 380-480 V, and Black for 500-690 V. 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, frequency, amperage, pole count, and clock position before installation.
Frequently Asked Questions
What are the key features and ratings of the KUPO KHTN725?
The KUPO KHTN725 is a 32 A CEE form plug (inline male) built to IEC (International Electrotechnical Commission) 60309-1 and 60309-2 standards for 380-415 V three-phase power distribution. It uses a 5-pole (3P+N+E) arrangement, a 6h earth position, an integrated phase inverter, and an IP44-rated PA6 nylon housing with nickel-plated brass contacts. The plug accepts 2.5-6.0 mm² conductors and measures 155 mm overall with a 79.5 mm body diameter.
How does the phase inverter on KHTN725 help with three-phase equipment?
Direction-sensitive motors and pumps may run in reverse when the incoming phase sequence differs from the equipment's expected order. The integrated inverter allows qualified personnel to correct phase rotation at the plug without opening the housing and moving the terminated cable conductors. It changes phase sequence only and does not alter the 32 A rating, 380-415 V class, 5-pole arrangement, or 6h key position.
How does the earth contact design of the KHTN725 enhance electrical safety?
The keyed protective earth contact at the 6h clock position physically prevents cross-mating with connectors assigned to incompatible voltage systems. The earth contact engages first and releases last, ensuring the ground path is established before the remaining four contacts connect. IP44 protection also guards the correctly assembled plug against splashing water and solid objects larger than 1 mm.
How does the IEC 60309 standard ensure KHTN725 works in multi-vendor installations?
IEC 60309-1 and IEC 60309-2 define the electrical identification and mating dimensions used by compliant CEE form connectors. A mating device must match KHTN725 in current rating (32 A), voltage class (380-415 V), pole configuration (5-pole, 3P+N+E), and earth-contact position (6h). The phase inverter does not bypass these compatibility requirements.
What cable preparation and dimensions apply to KHTN725?
Open the bayonet twist-lock housing, prepare the conductors to the required strip length, place each conductor in its corresponding terminal, and tighten the same-direction terminal screws. KHTN725 accepts 2.5-6.0 mm² conductors through a 22 mm cable entry. Its listed dimensions are 155 mm overall length, 89.5 mm body width, and 79.5 mm body diameter. Proper housing closure and cable-gland tightening are required to maintain IP44 performance.
Why does KHTN725 use a 5-pole configuration instead of 4-pole?
The 5-pole (3P+N+E) arrangement carries three phase conductors, neutral, and protective earth. Unlike a 4-pole (3P+E) connector intended for balanced three-phase loads without neutral, KHTN725 can support systems that distribute both three-phase power and line-to-neutral circuits. This makes the format suitable for event distribution, mixed-load panels, and portable equipment requiring a neutral conductor.