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Power modules installation
Important.
All external safety devices like: contactors, relays, flow switch & thermal protections are to be supplied and
installed by other.
When the SCR is installed inside a panel, the enclosure needs to be adequately louvered for proper ventilation
and heat dissipation. Call the factory for the derating amperage curves for these specific applications.
Electronic controls require special care for wiring and startup. To avoid problems, carefully follow the
procedures below.
Look at the wiring diagrams, and study them carefully. Be sure that you understand how the system is supposed to
work.
A) Location:
1- Can be installed inside a louvered approved cabinet or with the heatsink mounted externally.
2- Must be installed away from excessive heat source.
3- Nothing must restrain air circulation to the heatsink.
B) Installation:
1- If installed completely inside a cabinet, use the mounting tabs on the heatsink to secure the SCR to the back
plate of the panel.
2- If installed with heatsink outside the cabinet, use the proper model mounting template for the cut-out
dimensions and to check for mounting obstructions.
3- Respect mounting orientation
(this side up).
4- Mount the heatsink vertically on the side of the cabinet for proper heat dissipation.
5- Do not relocate the power switching modules on the heatsink.
R820 Installation and Dimensions
•
Mounting instructions & templates are available from the factory.
•
The cutout templates include hole positions for heatsink attachment to the electrical cabinet
❖ Single phase R820 will have 2 mounting screw, 1 on each side.
❖ Three phase R820 will have 4 mounting screw, 2 on each side.
•
Respect mounting orientation (this side up).
•
Mount the heatsink vertically on the side of the cabinet for proper heat dissipation.
•
If mounted on top or bottom of the cabinet, derate maximum usable amperage by 25%.
•
Do not relocate the power switching modules on the heatsink.
R820 single phase
R820-211-REV2
5.25 "
R820-321-REV2
5.25 "
R820-341-REV2
5.25 "
R820-421-REV2
5.25 "
R820-441-REV2
5.25 "
R820-471-REV2
5.25 "
R820-621-REV2
5.25 "
R820-641-REV2
5.25 "
R820-671-REV2
5.25 "
R820 three phase
R820-213-REV2
5.25 "
R820-323-REV2
5.25 "
R820-343-REV2
5.25 "
R820-423-REV2
5.25 "
R820-443-REV2
5.25 "
R820-623-REV2
5.25 "
R820-643-REV2
5.25 "
A
B
C
2.56"
4.50 "
2.56"
4.50 "
2.56"
6.50 "
2.56"
4.50 "
2.56"
6.50 "
2.56"
10.00 "
2.56"
4.50 "
2.56"
6.50 "
2.56"
10.00 "
A
B
C
2.56"
6.50 "
2.56"
6.50 "
2.56"
10.00 "
2.56"
6.50 "
2.56"
10.00 "
2.56"
6.50 "
2.56"
10.00 "
D
E
Weight
3.00 "
3.75 "
1.80
3.00 "
3.75 "
1.80
3.00 "
3.75 "
2.40
3.00 "
3.75 "
1.80
3.00 "
3.75 "
2.40
3.00 "
3.75 "
3.50
3.00 "
3.75 "
1.80
3.00 "
3.75 "
2.40
3.00 "
3.75 "
3.50
D
E
Weight
3.00 "
5.75 "
2.60
3.00 "
5.75 "
3.70
3.00 "
5.75 "
3.70
3.00 "
5.75 "
2.65
3.00 "
5.75 "
3.70
3.00 "
5.75 "
2.65
3.00 "
5.75 "
3.70
2
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