Vacon NX User Manual page 54

vacon • 52
In tables below you will find the specifications related to the cooling agent and its circulation. See
also Table 9 on page 25.
Min. liquid flow
per element
(drive)
Chassis
[dm
CH3
CH4
CH5 10 (10)
CH61 15 (15)
CH62 15 (15)
CH63 15 (30)
CH64 15 (45)
CH72 20 (20)
CH74 20 (60)
A = 100% water; B = Water/Glycol mixture 80:20; C = Water/Glycol mixture (60:40)
Definitions:
Liquid ref temperature, input: 30 ºC
Max temperature rise during circulation: 5 ºC
NOTE! Unless minimum liquid flow rate is ensured, air pockets may develop in the cooling
elements. Automatic or manual de-airing of the cooling system must also be ensured.
The following table will help you to determine the appropriate flows of cooling agent (l/min) with
given power losses (see Chapter 4.2).
Table 16. Cooling agent flow rates (l/min) in relation to power loss at certain glycol/water
Power loss [kW]
1
2
3
4
5
6
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5
Table 15. Information about cooling agent and its circulation
Nom. liquid flow per element
3
/min]
A A
3 (3) 5 (5)
8 (8) 10 (10)
15 (15)
25 (25)
25 (25)
25 (50)
25 (75)
35 (35)
35 (105)
Min liquid flow = Minimum flow rate to ensure of total venting of the
cooling element
Nom liquid flow = Flow rate that allows running the drive at Ith
Max liquid flow = If flow rate exceeds max liquid flow, risk of cooling
element erosion increases
100/0 80/20
4,41 3,94
8,82 7,88
13,23 11,82
17,64 15,75
22,05 19,69
26,46 23,63
(drive)
3
[dm /min]
B C
5,4 (5,4) 5,8 (5,8)
11 (11) 12 (12)
16 (16) 17 (17)
27 (27) 29 (29)
27 (27) 29 (29)
27 (54) 29 (58)
27 (80) 29 (86)
37 (37) 40 (40)
37 (112) 40 (121)
mixture
Glycol/Water ratio
60/40 40/60
3,58 3,29
7,15 6,58
10,73 9,87
14,31 13,16
17,88 16,45
21,46 19,74
INSTALLATION
Max. liquid flow
Liquid volume/
per element
element
(drive)
3
[dm /min]
A
20 (20) 0.11
20 (20) 0.15
40 (40) 0.22
40 (40) 0.38
40 (40) 0.38
40 (80) 0.38
40 (120) 0.38
40 (40) 1.58
40 (120) 1.58
20/80
3,06
6,12
9,18
12,24
15,30
18,36
[l]
A
0/100
2,87
5,74
8,61
11,48
14,35
17,22