J. T. Eaton LCX9000 Cooling, Drinking Water Specification, 3 Drinking Water Chemical Specification

LCX9000 Liquid-Cooled Drives User Manual

January 2007

Cooling

Instead of using air for cooling, Cutler-Hammer Liquid-Cooled drives are cooled with liquid. The liquid circulation of the drive is usually connected to a heat-exchanger (liquid-liquid/ liquid-air) which cools down the liquid circulating in the cooling elements of the drive. The cooling agents acceptable for use are drinking water, demineralized water or a mixture (60/40) of water and glycol. In a closed circulation system, the values in Table 2-3are recommended reference values. To avoid electrochemical corrosion, Eaton recommends adding an inhibitor (e.g. Ferrolix 332/Henkel or Cortec VpCI-649) in the cooling agent.

Note: If no heat-exchanger is used, actions must be taken to avoid electrochemical corrosion. Specifically no brass or copper elements may be used in the liquid circulation of the drive.

Drinking Water Specification

Table 2-3provides general guidelines for water quality.

Note: 1 mg/L = 1 ppm.

Table 2-3: Drinking Water Chemical Specification

Quality	Unit	Value
Acrylamide	µg/L	0.10
Antimony	µg/L	5.0
Arsenic	µg/L	10
Benzene	µg/L	1.0
Benzopyrene	µg/L	0.010
Boron	mg/L	1.0
Bromate	µg/L	10
Cadmium	µg/L	5.0
Chromium	µg/L	50
Copper	mg/L	2.0
Cyanides	µg/L	50
1,2-Dichloroethane	µg/L	3.0
Epichlorohydrin	µg/L	0.10
Fluoride	mg/L	1.5
Lead	µg/L	10

Quality	Unit	Value
Mercury	µg/L	1.0
Nickel	µg/L	20
Nitrate [NO3]	mg/L	50
Nitrate-Nitrogen [NO3-N]	mg/L	11.0
Nitrite [NO2]	mg/L	0.5
Nitrite-Nitrogen [NO2-N]	mg/L	0.15
Bactericides	µg/L	0.10
Bactericides, total	µg/L	0.50
Polynuclear aromatic	µg/L	0.10
hydrocarbons
Selenium	µg/L	10
Tetrachloroethylene and	µg/L	10
trichloroethylene total
Trihalomethanes total	µg/L	100
Vinyl chloride	µg/L	0.50
Chlorophenols total	µg/L	10

Table 2-4: Drinking Water Quality

Recommendations — Maximum Values

		Max.
Quality	Unit	Value
Aluminum	µg/L	200
Ammonium [NH2]	mg/L	0.50
Ammonium [NH2-N]	mg/L	0.40
Chloride	mg/L	<100
Manganese	µg/L	50
Iron	µg/L	<0.5
Sulphate	mg/L	250
Sodium	mg/L	200
Oxidizability [CODMn-O2]	mg/L	5.0
No aggressive water allowed.

To avoid corrosion of piping, the sulphate content must not exceed 150 mg/L.

2-8 For more information visit: www.EatonElectrical.com MN04005001E