Source google image: http://3.bp.blogspot.com/-Ru7fAJatk2g/Udl-OhgLysI/AAAAAAAAIFo/UKqVC1DxwK4/s1600/SYMBOLES+DES+RELAIS+TEMP+O+RIS%C3%89S.JPG
Schema electrique relais bistable
Source google image: http://3.bp.blogspot.com/-Ru7fAJatk2g/Udl-OhgLysI/AAAAAAAAIFo/UKqVC1DxwK4/s1600/SYMBOLES+DES+RELAIS+TEMP+O+RIS%C3%89S.JPG