KEB COMBIVERT F5 Instructions For Use

5 Operation of liquid-cooled devices
5.1 General information
In continuous operation liquid-cooled drive converters are operated with lower temper-
ature than air-cooled devices. This has positive effects on lifetime-relevant components
such as fan and DC link circuit capacitors and power modules (IGBT). Also the tem-
perature dependent switching losses are positively effected. The use of liquid-cooled
KEB COMBIVERT drive converters is offered in the drive technology, because there are
process-caused coolants available with some applications.
5.1.1 Pressure in the liquid cooler
Concept of pressure Value Description
System test pressure 20 bar
Hydrostatic pressure used to test the integrity and tight-
ness of the heat sink.
Operating pressure
=> Diagrams
of the cooling
design
Internal pressure that occurs at a certain point in time
asafunctionofthevolumeowintheheatsink.
Max. permissible operating
pressure
10 bar
Highest temporary pressure, including pressure surge,
which the heat sink will resist.
Table 13: Pressure in the liquid cooler
5.1.2 Material of the heat sink
Design system Material (voltage) Connection
Extrusion casting heat sink Aluminium (-1.67 V) 2 x hose connection G1/2 with mounting nut
Aluminium heat sink with
pressed pipes
Stainless steel (-1.04V)
Outer pipe diameter Ø 12 mm for 2 x function
nuts (optional)
Table 14: Heat sink and operating pressure
The aluminium liquid coolers are sealed with sealing rings and posses a surface protec-
tion (anodized) even in the ducts.
ATTENTION
In order to avoid a deformation of the heat sink and the damages there-
by, the indicated max. operating pressure may not be exceeded brie󰘱y
also by pressure peaks.
54
OPERATION OF LIQUID-COOLED DEVICES

KEB COMBIVERT F5 Specifications

General

Brand	KEB
Model	COMBIVERT F5
Category	DC Drives
Language	English