Method for bypassing a monopolar electrolyzer in series

A method for by-passing a monopolar electrolyzer out of a plurality of monopolar electrolyzers connected in series to an electrical power source, which electrolyzers consist of individual electrolysis cells each having anodic and cathodic contact points, by means of a jumper switch means comprising an internal circuitry and a multiplicity of extension arms for connection to the electrolyzers immediately preceding and following the electrolyzer to be by-passed, characterized in that

• said jumper switch means is positioned on a mobile cart (33) provided with mechanical devices suitable for permitting withdrawal of an electrolyzer out of the plurality of electrolyzers connected in series;
• said cart is brought in proximity of the electrolyzer to be by-passed;
• said jumper switch means is moved above the plurality of electrolyzers and supported by said multiplicity of extension arms fixed onto the contact points of the two electrolyzers immediately preceding and immediately following the electrolyzer to be by-passed, said multiplicity of extension arms comprising first extension arms connected to the anodic contact point of each individual cell of the electrolyzer immediately preceding the electrolyzer to be by-passed and second extension arms connected to the cathodic contact point of each individual cell of the electrolyzer to be by-passed, said first and second extension arms being joined to said internal circuitry to provide by-passing of the electrolyzer without a shift of electrical current in the adjacent cells of the electrolyzers immediately preceding and immediately following the electrolyzer to be by-passed;
• the by-passed electrolyzer is transferred onto said cart and moved to a maintenance area.