KEB COMBIVERT H6 Series User Manual

6 Cooling System
6.1 Installation of water-cooled units
Water-cooled drive converters are operated in continuous operation with lower tempera-
turethanair-cooledinverters.Thishaspositivee󰀨ectsonlifetime-relevantcomponents
such as fan and DC link circuit capacitors and power modules (IGBT). Also the temper-
aturedependentswitchinglossesarepositivelye󰀨ected.Theuseofwater-cooledKEB
COMBIVERT drive convertersiso󰀨eredinthedrivetechnology,becausetherearepro-
cess-caused coolants available with some applications. The following instructions must
be observed absolutely when this units are used.
6.1.1 Heat sink and operating pressure
Design system Material (voltage) max. operating pressure Connecting duct
Extrusion casting heat sink Aluminium (-1.67 V) 10bar 0000650-G140
The heat sinks are sealed with sealing rings and posses a surface protection (anodized)
even in the ducts.
NOTICE
Maximum operating pressure
The heat sink is permitted for a pressure or leak test upto 2-fold, maxi-
mum operating pressure. An UL acceptance with 5-fold, maximum oper-
ating pressure was executed. Pay attention to the guidelines 97/23/EC
of pressure units.
6.1.2 Materials in the cooling circuit
For the screw connections and also for the metallic articles in the cooling circuit which
are in contact with the coolant (electrolyte) a material is to be selected, which forms a
smallvoltagedi󰀨erencetotheheatsinkinordertoavoidcontactcorrosionand/orpitting
corrosion (electro-chemical voltage series, see table). An aluminum screw connection
orZnNicoatedsteelscrewconnectionisrecommended.Othermaterialsmustbeexam-
inedineachcasebeforeemployment.Thespeciccaseofapplicationmustbechecked
bythecustomerintuningofthecompletecoolingcircuitandmustbeclassiedaccord-
ing to the used materials. With hoses and seals take care that halogen-free materials
are used.
A liability for occuring damages by wrongly used materials and from this resulting corro-
sion cannot be taken over !
Material Generated Ion
Standard
potential
Material Generated Ion
Standard
potential
Lithium Li
+
-3.04 V Cobald Co
2+
-0.28 V
Potassium K
+
-2.93 V Nickel Ni
2+
-0.25 V
Calcium Ca
2+
-2.87 V Tin Sn
2+
-0.14 V
Sodium Na
+
-2.71 V Lead Pb
3+
-0.13 V
Magnesium Mg
2+
-2.38V Iron Fe
3+
-0.037 V
Titan Ti
2+
-1.75 V Hydrogen 2H
+
0.00 V
continued on the next page
67
COOLING SYSTEM

KEB COMBIVERT H6 Series Specifications

General

Brand	KEB
Model	COMBIVERT H6 Series
Category	Control Unit
Language	English