Electrolysis plants for hydrogen production (hydrogen stations)

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Section 7. Electrical equipment of special installations

Electrolysis installations and installations of galvanic coatings. Electrolysis plants for hydrogen production (hydrogen stations)

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Encyclopedia of radio electronics and electrical engineering / Rules for the installation of electrical installations (PUE)

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7.10.42. Electrolyzers of hydrogen stations must be equipped with the following electrical protection:

from single-pole earth faults, except for electrolyzers, in which the end electrode or the case of the end cell is grounded by design, for example, through a gas separator;
from interpolar short circuits;
from reverse currents when using motor-generators (on reconstructed installations).

7.10.43. Electrolyzers of hydrogen stations operating at voltages above 250 V with respect to the ground must have a mesh fence around the perimeter.

7.10.44. Dielectric mats (paths) should be laid around the electrolyzer of hydrogen stations.

7.10.45. At hydrogen stations, the distances between the electrolyzers, as well as between the electrolyzers and the walls of the room, must correspond to those specified in 7.10.41.

The following passages should be provided between the equipment:

the main ones - with a width of at least 1,5 m along the service front of machines (compressors, pumps, etc.) and devices with fittings and instrumentation; for small-sized equipment (with a width and height of up to 0,8 m), it is allowed to reduce the passage width to 1 m;
for the possibility of servicing from all sides (if necessary) between the equipment, as well as between the equipment and the walls of the premises - at least 1 m wide;
for inspection and periodic checking and adjustment of equipment and instruments - at least 0,8 m wide.

The normalized minimum width of the passages should be provided between the most protruding (at a height of less than 2 m) parts of the equipment, taking into account foundations, insulation, fencing, etc.

See other articles Section Rules for the installation of electrical installations (PUE).

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