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FAQ-Are the Lightning Protection Boxes for the UA5000 Universal

Publication Date:  2012-07-25 Views:  41 Downloads:  0
Issue Description

Q:

Are the lightning protection boxes for the UA5000 universal?
Currently, the following models of lightning protection boxes are used:
SPD27SZ lightning protection box
SPD28SZ
lightning protection box

Alarm Information
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Handling Process

A:

1. The SPD27SZ lightning protection box protects the power devices and electrical devices against over-voltage from lightning. The SPD27SZ lightning protection box is used for an outdoor cabinet powered by 220 VAC.
The SPD28SZ lightning protection box protects the power devices and electrical devices against over-voltage from lightning. The SPD28SZ lightning protection box is used for an indoor cabinet powered by 220 VAC.
2. Appearance difference
There are six LEDs on the panel of an outdoor lightning protection box but two LEDs on the panel of an indoor lightning protection box.
3. The technical specifications of these two models of lightning protection boxes are different and meanwhile the maximum discharge current Imax of the outdoor lightning protection box is greater than that of the indoor lightning protection box. Therefore, they are not universal.
Appendix: Technical specifications for the lightning protection boxes of the UA5000

 The lightning protection box can work effectively only after the device is well grounded in the area where rain and thunders often come. 

Root Cause
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Suggestions

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