| | | | |

Klippon Connect TTB Range for Instrument Transformer Wiring – Simple, Fast and Safe Wiring of Current and Voltage Transformers


July 27, 2021

Weidmuller’s TTB measuring transformer terminal block series is a unique systematic offering of modular terminals that meet all the connection requirements of critical transformer (current/voltage) protection and measurement functions. The series is approved according to IEC 60947-7-1 Annex D – safety-relevant components captively connected to the modular terminal block. In addition, North American approvals; such as, UL/CSA (cURus) are available as well.

The measuring transformer terminals of the TTB series have been specially developed for use in secondary circuits of measuring transformers. For safe application when disconnecting or isolating protection of measuring devices, the terminal short-circuits the current transformer and thus prevents high voltages from occurring in the secondary winding. One of the most important advantages of the new transformer terminal is the “close-before-open” contact for up to four connections. It ensures that the current transformer within the terminal is short-circuited before it is disconnected from the rest of the transformer circuit. This prevents the voltage at the current transformer from running up and protects it from damage or even destruction. After short-circuiting the current transformer (CT) side and simultaneously disconnecting the primary side, the meter can be easily and safely checked via relay test or replaced. The combination of a disconnecting lever and short-circuit bridge in a single system provides the possibility of forced short-circuit functionality to guarantee simple and safe wiring.

Thanks to the patent-pending Comparative Measurement (CM) lever connection, two terminal blocks can be selectively disconnected in order to interconnect a calibrated measuring device. After the measurement, the captive lever is reset to the original position, leaving the “close-before-open” contact active which is a unique feature of the TTB series that guarantees the highest safety for personnel and equipment. The switching state of the TTB series instrument transformer terminals is easily visible in all lighting conditions based on color coding. The disconnect lever can be operated by hand or with a standard screwdriver. It also facilitates the realization of multi-pole actuations.

The measuring transformer terminal blocks of the TTB series also adapt flexibly to different customer specifications. The integrated combination foot allows mounting on the two common mounting DIN rail profiles TS32 and TS 35. In addition, the terminal blocks are available with either PUSH IN or screw connection technology. A transparent protective cover system is available for particularly sensitive applications. Its cover can only be fixed when all connection components are in their initial position. In this way, the assembly is comprehensively protected against incorrect operation, unauthorized access and contamination without impairing visual inspection.





Related Articles

Network Infrastructure Featured Product Spotlight

PBUS 14 Panduit logo 400

This webinar presented by Beth Lessard and Keith Cordero will be highlighting three Panduit solutions that will optimize network equipment and cabling to ensure that your spaces are efficiently and properly managed to support ever-evolving business needs of today and beyond. Products that will be featured include PanZone TrueEdge Wall Mount Enclsoure, Cable Managers, and Adjustable Depth 4-Post Rack.


Editor’s Pick: Featured Product News

Siemens: SIMOVAC Non-Arc-Resistant and SIMOVAC-AR Arc-Resistant Motor Controllers

The Siemens SIMOVAC medium-voltage non-arc-resistant and SIMOVAC-AR arc-resistant controllers have a modular design incorporating up to two 12SVC400 (400 A) controllers, housed in a freestanding sheet steel enclosure. Each controller is UL 347 class E2, equipped with three current-limiting fuses, a non-load-break isolating switch, and a fixed-mounted vacuum contactor (plug-in type optional for 12SVC400). The enclosure is designed for front access, allowing the equipment to be located with the rear of the equipment close to a non-combustible wall.

Read More

Sponsored Content
Electrify Your Enterprise

Power is vital to production, and well-designed control cabinets are key. Allied Electronics & Automation offers a comprehensive collection of control cabinet solutions including PLCs, HMIs, contactors, miniature circuit breakers, terminal block connectors, DIN-rail power supplies, pushbutton switches, motor starters, overloads, power relays, industrial Ethernet switches and AC drives engineered to keep your operations running safely, reliably and efficiently.

Learn more HERE.

Products for Panel Builders

  • Amphenol TPC Wire & Cable: New Super-Trex SJOO Portable Cord

    Amphenol TPC Wire & Cable: New Super-Trex SJOO Portable Cord

    Amphenol TPC Wire & Cable proudly announces a new line of portable cable – Super-Trex SJOO Portable Cord. This innovative product is designed to meet the demands of harsh industrial environments and offers exceptional flexibility, durability, and protection. It is ideal for manufacturing and industrial settings in various applications, including powering light machinery, assembly line systems, portable… Read More…

  • Pfannenberg USA: New X-Series Cooling Units

    Pfannenberg USA: New X-Series Cooling Units

    Pfannenberg, Inc. has recently announced its new X-Series cooling units. The innovative X-Series marks a focus in energy efficiency and operational effectiveness for industrial cooling applications. Designed to meet the demanding needs of modern industries, the X-Series units feature an optimized control algorithm using inverter technology, developed from years of expertise. This allows for the… Read More…