Thanks a lot for your help, in terms of electrical engineering I don't have any contacts unfortunately, I'm on the hydraulic side of things. The pumps involved are the following. 1 x SQ5-70 – P2: 1.85kW - 1 x 200-240 V 50 Hz - Operating at 1.6kW 3 x SP11-15 – P2: 3kW Three-phase, 3 x 220-230 V 50 Hz / 3 x 380-400-415V 50 Hz – Operating at 2.8kW 1 x SP14-11 – P2: 3kW Three-phase, 3 x 220-230 V 50 Hz / 3 x 380-400-415 V 50 Hz – Operating at 2.6kW 6 x SP60-10 – P2: 18.5 kW Three-phase, 3 x 230 V / 3 x 400 V – Operating at 16.6kW Ideally I'd like to understand rather than having the answer, so if you have a recommended link which explains the different protections and how to size them it would be great. My internet research has for the most part been confusing...

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Thanks a lot for your help, in terms of electrical engineering I don't have any contacts unfortunately, I'm on the hydraulic side of things. The pumps involved are the following.

1 x SQ5-70 – P2: 1.85kW - 1 x 200-240 V 50 Hz - Operating at 1.6kW

3 x SP11-15 – P2: 3kW Three-phase, 3 x 220-230 V 50 Hz / 3 x 380-400-415V 50 Hz – Operating at 2.8kW

1 x SP14-11 – P2: 3kW Three-phase, 3 x 220-230 V 50 Hz / 3 x 380-400-415 V 50 Hz – Operating at 2.6kW

6 x SP60-10 – P2: 18.5 kW Three-phase, 3 x 230 V / 3 x 400 V – Operating at 16.6kW

Ideally I'd like to understand rather than having the answer, so if you have a recommended link which explains the different protections and how to size them it would be great. My internet research has for the most part been confusing...