Product Description
Overview
The protective earth (ground) conductor is the safety-critical backbone of any power distribution system. The PFLD-EGN-S120M40A delivers a robust, fault-tolerant connection for earth continuity at full 400 A capacity, ensuring that fault currents are safely diverted and that live components remain isolated from human contact. This drain interface line drain connector maintains the green insulation standard recognized across all major international electrical codes - a visual and functional guarantee of grounding integrity. With dual-rated 400 A/660 A capacity and rated for 1000 volts AC or 1500 volts DC, this connector handles the demands of industrial and renewable energy systems where earth fault protection is non-negotiable.
Key Features
- Rated Current: 400 A / 660 A dual-rated
- Voltage Rating: 1000 V AC maximum / 1500 V DC maximum
- Withstand Voltage: 4500 V test (three seconds)
- Short Circuit: 35.5 kilo-amperes symmetrical
- Insulation Resistance: Greater than 5000 MOhms at 500 V DC
- Contact Resistance: 0.1 mOhms nominal (at rated current)
- Operating Temperature Range: 45 to 85 °C
- Mating Cycles: 500 cycles minimum
- Ingress Protection: IP67 when mated
Standards
TÜV: Certified to TÜV standard 1111303479; CE Marking: Compliant with European Union directive requirements; RoHS Directive: Compliant with 2011/65/EU (Restriction of Hazardous Substances); REACH Regulation: Registered and compliant with EC 1907/2006 (Registration, Evaluation, Authorisation, and Restriction of Chemicals); UL94-V0: Highest flame-resistance classification for housing material. Match standards and compliance requirements to the local electrical code before installation.
Applications
Suitable for industrial power distribution and switchgear systems requiring redundant earth continuity, renewable energy installations (solar farms, wind facilities, battery energy storage systems) where ground fault protection is critical, heavy industrial machinery and process control systems operating at 400 A or 660 A capacity, modular power distribution cabinets and portable power solutions, marine and offshore platforms where environmental conditions demand robust earth connections, data center and telecommunications infrastructure requiring high fault current clearance, and any system where earth conductor redundancy enhances safety margin and regulatory compliance.
Compatibility
The PowerFit 400 A Line Drain Drain connector is designed for plug compatibility with source interfaces from major single-pole power connector families, enabling flexible system integration. The push-and-twist coupling mechanism (not CAM-type) is intuitive and reduces installation time while maintaining secure mechanical and electrical contact.
Cable gland accommodation: M40 x 1.5 thread (interior diameter 22 millimeters standard, or 33 millimeters with reduction sleeve). Accommodates cables up to 16.50 millimeters diameter when using the optional brass silver-plated reduction sleeve.
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
What kind of connector is PFLD-EGN-S120M40A and where does it fit in the power chain?
PFLD-EGN-S120M40A is a KUPO PowerFit 400 A line drain connector with a green housing, designated for the Protective Earth (PE) conductor. As the drain side of an inline cable connection, it receives the mating source contact and provides a sealed, IP67-rated junction when coupled. The green housing enables instant visual identification of the PE conductor across cable runs. It is commonly deployed in mining and tunneling applications. Underground mining and tunnel construction require power distribution in confined, humid, dusty environments where safety standards are especially stringent and equipment must withstand harsh mechanical treatment.
What are the electrical ratings and wire capacity of PFLD-EGN-S120M40A?
PFLD-EGN-S120M40A 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 silver-plated brass contact achieves a contact resistance of just 0.1 mOhms, significantly reducing resistive heating compared to plain brass contacts at sustained high-current loads. This low resistance is particularly important for PE circuits carrying continuous earth current.
Why is the green earth connector PFLD-EGN-S120M40A critical for safety?
Green identifies the Protective Earth (PE) conductor across virtually every international standard: NEC, IEC, Australian, old UK, and Chinese GB. Some regions specify green/yellow striped, but solid green is universally recognized as earth ground. Ground conductor integrity is the most critical safety element in any power distribution system. On the Line Drain connector, the green housing is visible along the full 190 mm body length, making PE identification easy even when cables are bundled tightly. The ergonomic rubber grip section also carries the color, so technicians can identify the phase while handling the connector. A distinct green connector ensures the safety earth is never confused with a current-carrying phase or neutral conductor. This is non-negotiable for personnel safety and equipment protection.
What certifications and safety ratings does PFLD-EGN-S120M40A carry?
PFLD-EGN-S120M40A 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. The silicone O-ring seal contributes to the IP67 rating when mated, meaning the connection is fully protected against dust ingress and temporary immersion in water up to 1 meter for 30 minutes.
How do you assemble PFLD-EGN-S120M40A onto a power cable in the field?
To assemble PFLD-EGN-S120M40A, remove the M40 cable gland and extract the contact. Insert the contact into the insulator and align the cotter pin hole. Strip back the cable jacket by approximately 33 mm, then slide the R120 reduction sleeve (brass with silver plating, up to 16.50 mm wire diameter) over the exposed conductor. Hammer the cotter pin in from its chamfered side for proper seating. Slide the cable with reduction sleeve into the contact, then tighten both set screws using a 5 mm hex key to a minimum of 10.5 N/m. Finally, thread the cable gland back on. The M40 gland includes two rubber bushings (inner diameter 23 mm and 33 mm) for flexibility with different cable sizes. At 190 mm total length with a 32.5 mm body diameter, the Line Drain is the longest connector in the PowerFit family, providing ample space for cable management and a secure grip surface.
What advantages does PFLD-EGN-S120M40A offer over conventional CAM-type connectors?
PFLD-EGN-S120M40A offers several meaningful improvements over conventional single-pole power connectors: the 1000 V AC / 1500 V DC voltage rating exceeds the typical 600 V maximum of traditional alternatives; silver-plated brass contacts deliver lower contact resistance (0.1 mOhms) than plain brass; the integrated M40 cable gland with sealing bushing provides cable strain relief and environmental protection in a single assembly; IP67 protection when mated provides dust-tight and waterproof sealing that most single-pole connectors lack. These features, combined with TUV Rheinland certification and the phase-encoded green housing for PE identification, make PowerFit a generation ahead of traditional designs.