Eaton Powerware 3G System SC200 Installation And Operation Manual page 27

Step 2 - Check AC-DC earth connection
An AC-DC earth link is factory fitted in the DC power system as shown in
the following diagram.
If this AC-DC earth link conforms to the earthing arrangements at the site
then no further action is required (ignore Step 3).
If this AC-DC earth link does not conform to the earthing arrangements at
the site then go to Step 3.
Step 3 - Installing a Surge Protection Device between AC and DC Earth (if required)
Ignore this step if the direct AC-DC earth link is used.
If a direct AC-DC earth link is not allowed at the site then:
Remove the factory-fitted AC-DC earth link cable.
1
Install a surge protection device in place of the AC-DC earth link cable,
2
as shown in the following diagram.
The surge protection device bonds the AC and DC earth during transient
activity to prevent damage to the rectifiers. The preferred transient
protective device is a transient earth clamp (TEC).
Procedure complete
Copyright © 2005-2007 Eaton Corporation. All Rights Reserved.
IPN 997-00012-54A July 2007
Installation
Factory installed AC-DC Earth Link
Mesh earth (ground)
DC Common
Transient earth clamp (TEC) surge
protection device
AC earth
DC earth / communications earth
DC Common
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