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How does the Twin 5 Plus 25D60 differ from the Twin 5 Plus?

Summary of Key Differences:

The Twin 5 Plus 25D60 introduces a redesigned cabinet, internal layout changes, improved installation and grounding, and software updates to support the 25D60 Grid Connection Box (GCB). These enhancements improve operational efficiency, EMC performance, and maintain compatibility with existing systems.

1. New Cabinet Design

The Twin 5 Plus 25D60 features a newly developed cabinet, including both the body and door, specifically designed to support the 25D60 Grid Connection Box (GCB). Key aspects include:

  • Redesigned Structure: Cabinet body and door reengineered to accommodate the 25D60 GCB.
  • Increased Dimensions: Enlarged overall size with a door scaled to meet functional requirements.
  • Streamlined Installation: Enables straightforward (de-)installation of the GCB in a single, linear motion—no need to remove other components.
  • Operational Efficiency: Easier production, installation, and maintenance reduce Total Cost of Ownership (TCO).
  • Function-Driven Styling: Cabinet form factor meets technical and regulatory requirements:
    • Maximum surface area (per tender)
    • Minimum door width (for GCB handling)
    • Minimum cabinet width (for GCB placement)
    • Maximum height for interfaces (e.g., sockets, displays)

 

2. Mounting and Internal Adjustments

Several internal modifications optimize installation, maintenance, and EMC performance:

  • Simplified GCB Mounting: GCB mounting plate and adapter removed; GCB now mounted directly on internally threaded weld studs with new screws.
  • Adapted Weld Studs for Depth: Component frame weld studs lengthened to match increased cabinet depth, allowing continued use of EMC-critical cables (e.g., antennas, display, Alfbus).
  • Improved Grounding Accessibility: Grounding bar weld studs repositioned halfway up the cabinet for easier access.
  • Enhanced Door Grounding: Weld studs for door grounding relocated higher to improve Surge Protection Device (SPD) performance.

 

3. Door and Locking System Enhancements

The Twin 5 Plus 25D60 retains the proven locking system with targeted improvements:

  • Retained Locking Concept: Door lever locking system remains unchanged in concept but scaled for the larger cabinet.
  • Improved Closing Mechanism: Minor refinements to espagnolette rod tips and lever locking plate improve door operation.
  • Updated Display Bracket: Slightly modified to support the updated espagnolette design.
  • Reinforced Door Strip: Additional weld studs and holes added to fix the strip with flange nuts, compensating for increased door flexibility.
  • Enhanced EMC Grounding: New PE (Protective Earth) connection weld stud added to the door.

 

4. Component Subframe and Electrical Layout

Internal layout changes maintain compatibility while improving flexibility:

  • Subframe Compatibility Maintained: Component subframe remains largely unchanged for use across all Twin 5 stations.
  • Main Switch Repositioned: Moved to the front of the cabinet on a new bracket for better accessibility.
  • DIN-Rail Extension and Terminal Block Upgrade: DIN-rail extended by ~17 mm to fit a larger terminal block (supports cables up to 16 mm²). Original main switch location now used for this block.
  • RCCBs Replaced with Fuse Holders: Offers installers greater configuration flexibility.
  • Ground Wire Repositioned: Ground wire between tilting and base frame moved to the right side to accommodate the extended DIN-rail.

 

5. Baseplate and Sealing

Redesigned to ensure proper installation and protection:

  • Redesigned for Compatibility and Protection: New baseplate and seal compatible with original concrete base and maintain IP54 rating.
  • Installation Reliability: Prevents omission of baseplate/seal—installation is not possible without them.
Keywords: Twin 5 Plus 25D60, Grid Connection Box, mounting and internal adjustments, new cabinet design, door and locking enhancements