Ammeter switch 1-pole 3 current transformer circuits
https://www.teconex.eu/shop/m20zm31g2-ammeter-switch-1-pole-3-current-transformer-circuits-48377
https://www.teconex.eu/web/image/product.template/48377/image_1920?unique=a3128b1
Interne referentie: M20ZM31G2
