Product Description
Overview
IEC 60446 designates blue as the neutral conductor color across European, Asian, and many international electrical standards. The PowerFit 400 A Panel Source in blue for neutral service provides a high-current neutral return path for three-phase power distribution systems, rated for 400 A continuous with 120 mm² cable or 660 A with 240 mm² cable. The patent key-release pin mechanism ensures the neutral connection remains mechanically secure during operation but can be released tool-free for maintenance. The non-conductive thermoplastic housing with UL94-V0 flame retardancy protects against fire propagation in panel enclosures.
Key Features
- 400 A continuous current capacity at 120 mm² cable; 660 A continuous at 240 mm² cable for heavy-duty applications
- Source interface design provides the power source pin for mating with Line Drain or Panel Drain connectors
- Patent key-release pin with POM (Polyoxymethylene) cotter pin enables tool-free disconnection without risking contact damage
- M12 threaded post with brass nut and spring washer for permanent, vibration-resistant panel installation
- Four diameter 5.5 mm fixing holes on flange (42 mm x 42 mm cut-out dimension) ensure secure mechanical mounting
- Plastic end cap over source interface provides IP 2X finger protection against electric shock when unmated
- Push-and-twist locking mechanism maintains positive mechanical engagement across 500 rated mating cycles
- Brass contact with silver plating delivers 0.1 mOhms contact resistance for minimal voltage drop and heat generation
- Non-conductive thermoplastic housing rated UL94-V0 flame retardant for safety-critical installations
- IP67 rating when mated ensures protection against water and dust ingress in outdoor or washdown environments
- 1000 V AC / 1500 V DC maximum voltage rating with 4500 V AC dielectric test voltage for substantial safety margins
- Maximum nut torque: 12 to 14 N/meter for proper fastening without over-tightening
Standards
TUV Rheinland certified (ID 1111303479) - Type Approved, Safety, Regular Production Surveillance; CE marked for European market compliance; RoHS (Restriction of Hazardous Substances) compliant; REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals) compliant; UL94-V0 flame retardancy classification for the housing material; IP67 environmental protection rating while mated (dust-tight, resistant to temporary submersion); Short circuit capacity: Up to 35.5 kiloamperes; Insulation resistance: Greater than 5000 MOhms at 500 V AC; Working temperature range: 45 to 85 °C. Match standards and compliance requirements to the local electrical code before installation.
Applications
Suitable for three-phase neutral return connections in power distribution boards and transformer panels, generator neutral bonding points and neutral-ground connection management systems, unbalanced load management panels where neutral current capacity is critical, portable power distribution neutral bus inlets for entertainment and event production, industrial process power systems requiring dedicated high-capacity neutral connections, temporary power infrastructure neutral distribution for construction and mining sites, and UPS output neutral connections and bypass switch neutral routing panels.
Compatibility
The PowerFit 400 A Panel Source connector is compatible with major brands of single-pole power connector systems. Its M12 threaded post interface and push-and-twist mating mechanism with key-release pin ensure standardized connection geometry across certified suppliers. The source interface mates with PowerFit Line Drain and Panel Drain connectors. Verify mechanical and electrical specifications with your mating connector manufacturer to check impedance matching and safe operating parameters. Use the color-coded and mechanically keyed design as a visual safeguard to prevent cross-phase connection errors during installation or reconfiguration.
Phase / Wire Color Convention
| Region | L1 | L2 | L3 | N | Ground |
|---|---|---|---|---|---|
| NA 120/208 V 1 | Green / G-Y | ||||
| NA 277/480 V 2 | Green / G-Y | ||||
| IEC 60446 3 | Green-Yellow | ||||
| AU/NZ Legacy 4 | Green-Yellow | ||||
| China 5 | Green-Yellow |
1 North America 120/208 V (NEMA / NEC) 2 North America 277/480 V (NEMA / NEC) 3 Europe, UK, Australia (current IEC 60446)
4 Australia / New Zealand legacy (pre-IEC) 5 China (GB 50303) G-Y = Green-Yellow (earth/ground)
Frequently Asked Questions
Where is PFPS-NBL typically installed and what does it feed?
PFPS-NBL is a KUPO PowerFit 400 A panel source connector with a blue housing, designated for the Neutral (N) conductor under Europe and UK (IEC 60446) conventions. Mounted permanently at generator outputs, main panels, and power supply enclosures, it is the origin point from which power flows outward through the PowerFit system. Despite being panel-mounted, it retains the key-release mechanism for convenient field disconnection. It is commonly deployed in sports venue and stadium event applications. Stadium events combine massive power demands with outdoor exposure and strict safety requirements.
How much current can PFPS-NBL supply from a distribution panel?
PFPS-NBL is rated for 400 amperes continuous with 120 mm² cable, scaling to 660 amperes with 240 mm² cable. The maximum voltage rating is 1000 V AC or 1500 V DC. The M12 threaded post termination accepts conductors through a brass nut and washer assembly, tightened to a maximum of 12 to 14 N/m. The four-point flange mount with 5.5 mm fixing holes distributes mechanical load across the panel surface.
What does the blue housing on PFPS-NBL indicate about its neutral assignment?
Blue as Neutral follows IEC 60446, the current harmonized European and UK standard. Under IEC, blue is exclusively reserved for the neutral conductor. This is the most commonly specified neutral color in international installations and is mandatory in EU member states. On the Panel Source, the blue housing is visible on the connector face at the power origin point. Color coding at the source end of the distribution chain is especially important because phase assignment errors at the panel propagate through every downstream connection. Using blue for neutral in IEC jurisdictions is not optional. It is a code requirement that simplifies circuit identification and improves safety across multi-national installations.
What independent testing has PFPS-NBL undergone?
PFPS-NBL is TUV Rheinland certified (ID 1111303479) under Type Approval, Safety, and Regular Production Surveillance categories. It also carries CE marking, RoHS compliance (Restriction of Hazardous Substances), and REACH compliance. The housing material achieves a UL94-V0 flammability rating, which is the highest classification for vertical flame resistance in plastics, meaning the material self-extinguishes within 10 seconds with no flaming drips. As the power origin point, the Panel Source undergoes the same TUV safety evaluation as the full PowerFit system, including the key-release mechanism and panel-mount retention.
How does PFPS-NBL integrate with existing power infrastructure in sports venue and stadium event settings?
PowerFit connectors are designed to be compatible with major brands of single-pole power connector. The dual 400 A/660 A rating handles the largest venue power feeds, 13 color-coded variants support complex multi-circuit distribution plans, and CE marking plus TUV certification satisfy international event safety standards. For N circuits using Europe and UK (IEC 60446) color conventions, the blue PFPS-NBL ensures that phase identification remains consistent when mixing PowerFit connectors with existing inventory.
What panel cutout and mounting specifications does PFPS-NBL require?
The PFPS-NBL mounts through a 42 x 42 mm panel cutout using four 5.5 mm fixing holes. The M12 threaded post secures to the panel with the included brass nut and washer at 12 to 14 N/m maximum torque. Despite being a permanent panel-mount connector, PFPS-NBL retains the PowerFit key-release mechanism, allowing field technicians to disconnect mating Line Drain connectors without tools. IP 2X finger protection and a plastic end cap protect the contacts when no mating connector is present. The Panel Source has a 55.3 mm flange width and 50.7 mm total depth, with a 42.5 mm body diameter. It is shallower than the Panel Drain, requiring less clearance behind the panel.