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Text version of the page
SIZING THE SSR Once you have identified the series that offers the best modulation for the load, you should consider the following (in
sequence) to select the product:
- connection scheme (single-phase, 3-phase, 3-phase with only 2 controlled phases)
- line voltage
- load power to be controlled (total power in case of 3-phase).
- type of control required (logic or analog)
- any options, such as load diagnostics Single-phase
SSRRVI I=P V 3-phase
Star without neutral or delta ("in line", or "closed")Star with neutral"Open" delta Star without neutral or delta ("in line", or "closed") P=(watt) Total power on loadV=(Volt) Line voltage I=rated current* in SSR for sizing *In 3-phase configurations, this is the current in eachbranch of the load. L1 L3L2 L1L2L3 Guidelines for product selection 3-Phase with two controlled phases
L1L2L3 LEGEND
WARNING:Even if this application works, it causes a large unbalance on the lines during switch on and switch off. 17
SSRRVI I=P V 3-phase
Star without neutral or delta ("in line", or "closed")Star with neutral"Open" delta Star without neutral or delta ("in line", or "closed") P=(watt) Total power on loadV=(Volt) Line voltage I=rated current* in SSR for sizing *In 3-phase configurations, this is the current in eachbranch of the load. L1 L3L2 L1L2L3 Guidelines for product selection 3-Phase with two controlled phases
L1L2L3 LEGEND
WARNING:Even if this application works, it causes a large unbalance on the lines during switch on and switch off. 17