Power electronics Technique de sécurité

Safety switching devices Standstill / speed monitoring Multifunctional safety devices Wireless Safety System Safety switches Guard locks Key transfer Residual current monitors Insulation monitors Insulation fault location system Measuring and monitoring relays Fault annunciators and fault annunciator systems SMS-Telecontrol module ■ Solid-state relays /- contactors ■ Reversing contactors ■ Softstarters ■ Motor brake relays ■ Speed and phase controllers ■ Multifunctional motor control units Latching / interface / switching relays Interface modules Power supply units I / O modules CANopen PLC CANopen...

Machinery and plant Power generation/distribution Oil and gas industry Automation Transport and material handling systems Rail technology Aviation/marine industry Paper and printing industry Food industry Rubber/plastics industry Heating and refrigeration Automotive Mining/metal working Chemical/pharmaceutical applications Medical technology Water/waste water treatment Cable cars/ski lifts ... and wherever safety has high priority. We can cover your industrial applications as well!

The DOLD philosophy, “Our experience. Your safety” constitutes our program: Offering solutions based on over 80 years of experience with a workforce of more than 400 employees, we manufacture high quality products using state-of-the-art production plant at our Furtwangen facility in Germany. The comprehensive product range includes relay modules, safety relays with positively-driven contacts and electronic housings with virtually unparalleled production detail. The combination of know-how, innovation and experience makes us one of the leading worldwide manufacturers. Apart from standard solutions,...

With soft starters by DOLD, you’ll have an intelligent, reliable, and user-friendly motor start and motor management system. Smart Drive Solutions Demanding drive tasks call for high-performance and flexible device solutions. High-performing electronics by DOLD include a wide range of products such as solid state contactors, motor starters, soft start and braking devices, as well as reversing contactors, speed controllers, and multifunctional motor control devices. 3-phase controlled soft starter device with integrated monitoring function for soft starting motors. With just 67.5 mm width, the...

POWERSWITCH – Intelligent control and monitoring PI 9260 Semiconductor contactors from DOLD have a long service life and are used everywhere that high switching frequencies and switching cycle are required. MINISTART – Intelligent motorstarter The intelligent, hybrid motor starter offers up to 6 functions in a compact enclosure with just 22.5 mm width. It combines the functions of reversing, soft starting, soft run-down, and protection of 3-phase motors up to 4 kW in a single device.

Table of contents Function

Alphabetical index Type

Function index Function Solide-state relay / - contactor Reversing contactor Solid-state relay / - contactor with analogue input Reversing contactor with soft- Solid-state relay / - contactor

Zero-voltage switching with integrated electrical interlock and heat sink, top hat rail mounting

Motor brake relays MINISTOP

Solid-State Contactors Solid-state Contactors - Basics and applications Application fields Solid-state contactors and relays proved to be good in industrial applications where high switching frequencies or a large number of switching cycles are required. With their long service life and wearless switching they solve switching and control tasks in specific applications in an extremely economic manner. Fields of application include: • Extrusion and injection moulding plants • Heating controls • Soldering lines • Hot-melt glueing robots • Oven controls • Three-phase motors • Lighting controls •...

Notes for users To ensure a trouble-free operation users have to consider following issues: cooling, protection by fuses and isolation of solid-state contactors. 1. Cooling Heat sinks have to be selected because of the heat loss arising in the semiconductor. The thermal resistance Rth is the characteristic parameter of a heat sink and is measured in [K/W] (K = Kelvin, W = Watt). Where: The higher the thermal resistance the poorer is the solid-state relay cooling. The relation between temperature of the solid-state relay, loss power and heat sink is as follows: 3. Disconnecting device for isolation...

Softstarters Why are softstarters used? 1. Starting motors Three-phase asynchronous motors are most common as drives in today’s machinery and installations. In the power range up to 5.5 kW, such motors are mostly started by a direct-online starter, and by star/delta starters above this power. When doing so, it may happen that the driving elements and thus the driven machine connected to them are suddenly loaded and therefore overloaded in the moment of starting. Also work pieces and handled parts may be damaged. These problems can be perfectly solved by the use of softstarters. By phase-angle...

Motor Braking Units Safe braking of three-phase motors The wish for more safety of industrial machines requires reliable braking devices. However, economic considerations often matter when it comes to their purchasing apart from the safety aspect. By quick stopping of dangerous machine parts braking devices prevent both industrial accidents and also damages to equipment. Therefore, accident prevention rules require them for some machinery and plants, e.g. in the wood and textile industries. Moreover, braking devices help to reduce cost by shortening the deceleration times of machines. Today,...

Motor Braking Units PTC thermistors specifically offered for motor protection are suited as temperature probes. The signal output contact of the thermal monitoring should arranged so that the motor is stopped for safety reasons when the control contact trips, but can not be restarted afterwards until the thermal data allow a restarting. Softstarters extend the motor service life To extend the service life of three-phase motors brake devices are often used in combination with softstarters. They allow a more economic design of the driving components and can also be retrofitted in existing installations...