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Revision 8.6
SECTION 2 : SYSTEM DESIGN
19
Table 2-6 details the THYROMAT Enclosures.
Table 2-6 : THYROMAT Enclosures
Enclosure Size and Ventilation Table
THYROMAT
MECHANICAL
Sizes
THYROMAT
Current
Ratings
Total Heat
Dissipation of
Switchgear
Height
(mm)
Length
(mm)
Width
(mm)
Remarks
M100
25 A
480 W
1400
800
400
No forced ventilation
required.
30 A
480 W
1400
800
400
60 A
480 W
1400
800
400
M150
100 A
480 W
1400
800
400
150 A
720 W
1400
800
400
M350
200 A
960 W
1400
1400
400
350 A
1 600 W
1400
1800
400
Forced ventilation
with filters
recommended.
M500
400 A
1 830 W
1400
1800
400
M1000
500 A
2 280 W
1800
1400
500
Forced ventilation
with filter
recommended or
open chassis plate
installed inside
crane girders where
possible.
700 A
3 200 W
1800
1400
500
1 000 A
4 580 W
1800
1600
500
M2000
1 200 A
5 430 W
1800
1800
500
1 500 A
6 680 W
1800
1800
500
2 000 A
8 800 W
1800
2100
500
M2500
2 500 A
10 750 W
2 100
2 100
500
2.8.
SELECTION OF RESISTORS
The design and selection of the rotor resistor is detailed in the following paragraphs. It is assumed that the
designer has a good working knowledge of crane mechanical power calculations.
Step 1
Determine the electrical power (
P
e
) of the motor for the duty at which the crane will operate, from motor
manufacturer
’s data tables.
