Pfisterer 2DIREKT | Terminal Clamps & Cable Connections for Transformer Bushings & Busbars

2DIREKT from PFISTERER – Connection Terminal For Distribution Transformers

Thorne & Derrick | Approved Pfisterer Supplier | UK & Export Sales

Pfisterer 2Direkt

The safe supply of energy is based on functional supply networks made up of an array of reliable individual components. With almost 100 years of contact technology experience PFISTERER can offer innovations for easy and safe installation these can be found in every 2DIREKT terminal block.  The 2DIREKT terminal clamp by PFISTERER is a solution for cable connections to transformers and busbars.

The 2DIREKT clamp is connected directly to the distribution transformer. It screws onto the transformer bushing and is secured via a clamping groove and clamping screw. This reduces the amount of installation work and the risk of connection errors.

No cable lugs have to pressed on, and no wire-end ferrules have to be fitted. There are fewer points of contact and transition resistance is minimised.

The 2DIREKT A version allows cables to be connected directly to busbars. Fine grooves on the underside of the clamp enables connection without additional components directly on the busbar.

2DIREKT from PFISTERER Product Portfolio

The 2DIREKT portfolio offers solutions for connections to transformers and busbars:

2DIREKT

• For transformer bushings according to DIN EN 50386
• Clamp is directly contacted on the transformer connection bolt (with slot clamping or counter technique)
• With different connection threads
• Connection of up to eight conductors
• Without grooving on the lower side of the clamp

2DIREKT A

• Connection directly on a bus bar
• With through hole, threaded hole or stud bolt
• Connection of up to two conductors
• Special contact grooving on the lower side of the clamp

Key Facts

• Voltage: up to 1 kV
• Current: up to 4 kA
• Conductor cross-section: 16 to 400 mm²
• Conductor: aluminium class 1 and 2, copper class 1, 2 and 5 (fine wire)
• Transformer clamp for bushings per DIN EN 50386
• Type tested according to IEC 61238

Application Photos of DIREKT

2DIREKT – Connection on a transformer bushing, partly with ball fixed points and covers

2DIREKT A – Connection on a safety edge or bus bar

One clamp for all applications

Benefits

• Direction of conductor outlet horizontal or vertical
• Connection without wire end ferrule
• Small space requirement
• Large cross-sectional areas
• Releasable connection
• Low contact resistance (two transitions points)
• Spring Contact
• Contact screw:
  ■ Rotatable pressure plate
  Contact force independent of conductor material (same friction partners)
  Prevents damage and shearing of fine-stranded single wires during assembly
  ■ Zinc-based coating
  Setting of defined rubbing properties
  Similar effect as greasing

Allocation Bolt Size/Current/Apparent Power

• Orientation guide for the allocation of the bolt size to the current and the transformer size
• Max. Current standardised according to DIN EN 50386
• Apparent power calculated to DIN EN 50464

Accessories For 2DIREKT

Ball Fixed Points for 2DIREKT*

• The Ball Point is used for Allowing Safety equipment to clamp onto when Earthing to ground, or short circuiting.
• Function of a contact screw (Pressure plate on the lower side)
• Usage in bare conditions only with a conductor or spacer (623409002) underneath

*Threads of the ball fixed point must be greased with technical Vaseline during assembly! Short-circuit current for D20=23,7 kA/1s und D25=29,6 kA/1s

Matching Covers

■ Advantages of the covers

• Provides protection against contact (IP2X)
• Keeps dust mainly out
• Protects from the weathering

■ Selection of covers depending on

• Clamp
• Bolt size (diameter)
• Number of conductors
• Application with/without ball fixed points
• Indoor or outdoor application
• Vertical or horizontal cable outlet

Matching Covers

Soft Covers

• Suitable for indoor and outdoor usage, provided the cover allows it (Outdoor application only with horizontal cable outlet)
• NOTE: One cover can be suitable for several numbers of conductors. Depending on the clamp, a separate foam insert (e.g. 331348002) must be used

Hard Covers

■  For indoor usage

• Transparent cap can be mounted vertically or horizontally
• In principle, horizontal and vertical cable outlet possible (possibly restricted by ball fixed point)

■ For outdoor usage

• Closed at the top
• Only horizontal cable outlet possible

Matching Covers With Earthing Option

Soft Covers

• For indoor and outdoor application
• Offers a flap lid for earthing
• One version with different foam inserts (331348002)

Hard Covers

• For indoor application
• With flap lid for application with ball fiex point
• Horizontal and vertical cable outlet possible in principle (With flat two-wire clamps only vertical cable outlet)
• For outdoor application
• Application with ball fixed point not possible

Matching Covers With Earthing Option

2DIREKT | ISICOMPACT | LV Piercing Connectors

Thorne & Derrick stock and distribute PFISTERER CONNEX Connectors for medium / high voltage cable connection and termination to electrical systems up to 33kV – we provide competitive prices for PFISTERER CONNEX connectors used to terminate and connect polymeric insulated MV-HV cables into gas insulated switchgear and electrical equipment from extensive UK stocks.

The SEANEX inner cone solution is an offshore variant of the successful Connex HV connection system that is specially adapted for 66kV inter-array cabling.

Data Sheets

• 2DIREKT from PFISTERER Cable Connections & Terminal Clamps for Transformer Bushings & Busbars
  Download