Corrosion Inhibitor Additive (Inhibiting); Biocide Additive (If Required); Equipotential Bonding - Siemens SINAMICS S120 Equipment Manual

Internal Liquid Cooling

9.4 Corrosion Inhibitor Additive (Inhibiting)

9.4 Corrosion Inhibitor Additive (Inhibiting)
9.4
Nalco 00GE056 (ONDEO Nalco; http://www.ondeonalco.com) is recommended as a
corrosion inhibitor. The concentration of corrosion inhibitor in the cooling water must be at
least 2500 ppm (250 ml/100 liter KW).
The water quality must be in accordance with Chapter 9.3 or de-ionized water.
Notice
Corrosion inhibitor does not need to be added if the anti-freeze Antifrogen N is used in the
right concentration (see Anti-Freeze Additive).
9.5

Biocide Additive (If Required)

9.5
• Adding Nalco N 77352 (ONDEO Nalco; http://www.ondeonalco.com) intermittently is
• When anti-freeze Antifrogen N is used, the biocide should be sufficiently effective as of a
9.6

Equipotential Bonding

9.6
Equipotential bonding between the components in the cooling system is required
(SINAMICS S120, heat exchanger, piping, pump, etc.). This must be effected using a copper
bar or stranded copper with the appropriate conductor cross-sections to prevent the
electrochemical processes.
All cabinets must be bolted together in such a way as to ensure good conductivity (e.g.
cabinet beams directly connected to ensure conductivity) to prevent potential differences
and, in turn, avoid the risk of electrochemical corrosion. For this reason, a PE bar must also
be installed in all the cabinets, including the re-cooling system.
9-4
recommended twice a month.
Required amount: 5 – 15 mg / 100 liter of cooling water. This product does not impair the
effectiveness of the corrosion inhibitor with Nalco 00GE056.
concentration of 20%.
Equipment Manual Booksize Cold-Plate Power Sections
Manual, (GH4), Edition 06.2005, 6SL3097-2AJ00-0BP2