Relay search

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Process industry

Introduction

Stora Enso is the global rethinker of the packaging, paper and wood products industry. 

Main selection reasons

In the Kotka Sawmill AC-solenoid valves are used to control hydraulics. The solenoid valves were fitted with suppression components in order to prevent burning of relay contacts due to sparking. Because of the relatively high switching frequency (1Hz) the aim was to change the electromechanical relays before problems would arise. Nevertheless, sudden occasional break downs of the relays in the stock feeding system and saw line caused serious danger and production losses.

The electrical maintenance team of sawmill selected SLO 24IRA to control the stock turntable because it has an even 0,5 ms off-delay. Other relays in the sawline were changed to regular Triac relay SLO 24TR. Since the changes were made, the sawline works without problems and none of the new relays have been changed.