Manufacturer: PTR HARTMANN GmbH

DIN Rail Terminal Blocks

Terminal blocks are normally used to connect a wire to a PCB; DIN rail terminal blocks connect the wire. Depending on the field of use, they are fitted to mounting rails or mounted directly. In practical use, spring terminal technology has also established itself alongside screw connection technology. For setting up a complete system of DIN rail terminal blocks, PTR differentiate between ten different product families. In addition to the various forms of feed-through terminal blocks, these include earth, neutral disconnect, fuse, test disconnect and transformer terminal blocks.

Feed-Through Terminals, Screw Principle by PTR

Mostly apply the screw principle, which has proved itself millionfold and is used worldwide. Clamping yoke and screw are both produced from hardened steel. This provides the clamping yoke unit with the necessary contact power to press the mains-operated conductor against the busbar and in that way to guarantee a gas-proof and vibration- and shake-proof connection.
Terminal blocks with screw principle are available for a very large cross section area of 0.08 mm² to 240 mm². Different kinds of conductors, inflexible and flexible multi-wired and fine-wired conductors – everything leads to a safe contact with this technique!

Feed-Through Terminals, Leg Spring Principle by PTR

Leg Spring Principle FR / FRSL
Leg spring terminal blocks save up to 80% of the wiring time! Compared with screw and tension spring terminal blocks, it is not necessary to use tools to connect the conductor: Massive conductors or flexible conductors with ferrules can be directly applied into the terminal. While inserting the wire the contact with the busbar is automatically established through the leg spring. A screw driver can be used to loosen the conductor or to insert flexible conductors without ferrules. These terminal blocks can be used in all fields of electrical engineeringwithout limitation.

Feed-Through Terminals, Tension Spring Principle by PTR

• 4 alternative labelling options
• double jumper shafts
• test points on the contacts
• encoded fitting

PTR’s tension spring loaded terminals include feed though terminals and earth terminal blocks up to a rated cross-section of 16 mm², and double and triple variants.

Earth Terminals, Screw Principle by PTR

Earth Terminal Blocks SRSL
The strict VDE requirement imposed on ground connections, such as low contact resistance, corrosion-free connection points, secured screws, green-yellow colour coding and clear circuit identification – are fully oberserved by the PTR earth terminal blocks. Mounted on the same DIN rail with other types of terminals, they are easily distinguished by their green-yellow colour code. For special emphasis the earth terminal blocks consist of an enclosed green-yellow half shell insulated body made of Polyamide 6.6. Incoming and outgoing earthed conductors have a separate connection point. The structural design of the earth terminal blocks is based on the fact that the mounting rail is used not only mechanically, but also electrically, i.e. as a ground (PE) busbar. Therefore it is possible to position the earth terminal blocks directly next to the phase conductor terminals. Earth terminal blocks offer the same space savings and design features as the other PTR terminal blocksand the general terminal marking system can be used.

Earth Terminals, Leg Spring Principle by PTR

Leg Spring Principle FR / FRSL
Leg spring terminal blocks save up to 80% of the wiring time! Compared with screw and tension spring terminal blocks, it is not necessary to use tools to connect the conductor: Massive conductors or flexible conductors with ferrules can be directly applied into the terminal. While inserting the wire the contact with the busbar is automatically established through the leg spring. A screw driver can be used to loosen the conductor or to insert flexible conductors without ferrules. These terminal blockscan be used in all fields of electrical engineering without limitation.

Earth Terminals, Tension Spring Principle by PTR

PTR’s ZRSL earth terminal blocks with tension spring connectionshave the same outer dimensions as the ZR series of feed-through terminal and are for the same cross-sections. This enables earth terminal blocks to be mounted directly beside feed-through terminal blocks.

The main characteristics are:

• low transition resistance
• non-corroding contacts
• green/yellow marking on the insulating housings

This means they meet the stringent requirements of IEC 947-7-2. A main difference between these and the earth terminal blocks with screw connections is the automatic contact when the terminal blocks are attached to the mounting rails.

Accessories by PTR

The PTR accessories program has been considered and developed in a user-related way. A multitude of technical applications is realizable with a minimum effort. Nevertheless the fitting piece cannot always be found in the accessories program: Do you need differently printed identification labels or a fuse not listed in the catalogue? Approach us! Besides the accessories listed here, we also accomplish individual wishes.