2DIREKT from PFISTERER | Cable Connections & Terminal Clamps for Transformer Bushings & Busbars
Posted on 30 August 2022
Thorne & Derrick | Approved Pfisterer Supplier | UK & Export Sales
2DIREKT from PFISTERER
Simple, Safe, Versatile Connectors
In modern substation engineering, cable connections are increasingly implemented using screw technology. The 2DIREKT terminal clamp by PFISTERER is a solution for connections to transformers and busbars.
2DIREKT combines simple installation with a compact, cost-effective design.
Almost 100 years of contact technology experience and innovations for easy and safe installation are in every 2DIREKT terminal block.
Connects directly to transformer bushing or busbar
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.
The 2DIREKT is connected directly to the distribution transformer, making palm terminals, cable lugs, sleeves and nuts redundant
Safety during installation and operation
The patented conductor connection system eliminates damage to the conductor during installation. A rotating plate on the base of the clamping bolt prevents individual fine-wire conductors from being damaged or even cut off. During operation, the plate functions like a spring and ensures constant contact pressure.
One clamp for all cross-sections
The 2DIREKT clamp can be used for multiple cross-sections. Various versions are available for cross-sections of 16-95 mm², 35-240 mm² and 185-400 mm². All forms of class 1, 2 and 5 copper conductors as well as class 1 and 2 aluminium conductors can be connected.
This makes the 2DIREKT not only practical but also cost-effective. The right clamp is always available on site, and stock keeping is much simpler. 2DIREKT clamps are electrically type-tested in accordance with IEC 61238-1 class A.
Compact, sophisticated design
2DIREKT offers two cable outlet directions in one body. The clamping channel and the threaded hole for the clamping screw are identical, so the conductor can be connected at a 90° angle if required. This ensures easy installation even in confined environments.
2DIREKT
Benefits
- Conductors can be connected vertically and/or horizontally
- Connection without wire-end ferrule or cable lug
- Individual strands are not damaged
- Reduced space requirements
- Removable connection
- Installation with standard tools, no compression required
- Range-taking: fewer different types means simpler stock keeping
2DIREKT 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
Connection for busbars
The 2DIREKT A version allows cables to be connected to busbars. The clamp is mounted directly on the busbar. Fine grooves on the underside of the clamp make line contact, ensuring very good power transmission that remains stable over time with minimal contact resistance. Depending on the installation situation, 2DIREKT A is available with a through hole, threaded hole or stud bolt.
Further Reading
- ISICOMPACT from PFISTERER | Branch Terminals for LV Cables & House Service Connections
- Insulation Piercing Connectors LV for Low Voltage Live Working & Cable Jointing
THORNE & DERRICK
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.
Thorne & Derrick are national distributors of LV, MV & HV Cable Installation, Jointing, Substation & Electrical Equipment – servicing businesses involved in cabling, jointing, substation, earthing, overhead line and electrical construction at LV, 11kV, 33kV, 66kV and EHV. Supplying a complete range of power cable accessories to support the installation and maintenance of low/medium and high voltage cable systems:
- Slip-on Cable Terminations
- Cold-shrink Cable Terminations
- Heat-shrink Cable Terminations
- Cable Joints – Heat & Cold-shrink
- Separable Connectors (Euromold)
- Surge Arresters & Switchgear/Transformer Bushings
Key Product Categories: Duct Seals | Cable Cleats | Cable Glands | Electrical Safety | Arc Flash Protection | Cable Jointing Tools | Cable Pulling | Earthing | Feeder Pillars | Cable Joints LV | Joints & Terminations MV
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.
MV Connex Products | Ex Stock Thorne & Derrick | Inner Cone Cable Connectors 33kV
