Switching ON the primary of an AC transformer can often generate high inrush currents. Applying electric power to the primary of a transformer can lead to more or less big troubles, especially if this operation is intended to be very frequent.
Frequent switching of the primary without adapted solution can lead to damages in the transformer primary circuit.
Inrush current can :
Using celduc® relais SSR instead of contactor can improve considerably the switching operation but you should choose the right switching mode.
Our dedicated application note will help you to better understand the difference between :
SWITCHING A TRANSFORMER LOAD WITH STANDARD ZERO-CROSS SOLID-STATE RELAY
SWITCHING A TRANSFORMER LOAD WITH STANDARD RANDOM SOLID-STATE RELAY
SWITCHING A TRANSFORMER LOAD WITH PEAK STARTING SOLID-STATE RELAY
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TO MAKE IT SHORT :
A peak starting Solid State Relay allows the starting current of the transformer to be reduced. So our SOP range with a peak control mode is designed for the start-up of transformer primary circuits and all saturable inductive loads in order to avoid magnetising current peaks.
SOP69070 can drive up to 32A transformers and is a very efficient control solution for small to medium transformers.