Installation
Copyright © 2007-2013 Eaton Corporation. All Rights Reserved.
IPN 997-00012-49G May 2013
21
Step 2 - Check high ac voltage protection at the site
1
Check if the ac voltage is expected to exceed 275V (L-N).
2
If so, then it is strongly recommended that an external high voltage protection
unit (HVPU) be installed. This will automatically disconnect the ac at high
voltage and reconnect it at normal voltage.
3
Install the HVPU as in the following diagram.
4
Connect the High VAC alarm output to one of the Digital Inputs on the I/O
board (see the diagram on page
The High VAC alarm signal lines must be isolated from the ac supply by a
voltage-free relay contact.
AC supply
Primary transient protection devices
High voltage protection unit with alarm output
Secondary transient protection devices
(MOVs)
dc power system
I/O board
SC200 or SC100 system controller
Rectifiers
Step 3 - Check the type of ac supply, disconnect device and RCDs
1
Check the type of ac supply. Only the types of ac supply listed in Task 3 on page
Only use a two-phase or three-phase (L-L) ac supply if referenced to earth, or a
protection system is in place so that the phase-earth voltage cannot exceed the
rating of the rectifier.
2
Check that the APS will be connected to a suitable upstream ac disconnect
device such as Miniature Circuit Breaker(s) (MCB) or fuses.
3
Check the disconnect device will isolate both the phase and neutral conductors
in single-phase and three-phase connections, unless the neutral conductor is
clearly identified.
4
Check that any Residual Current Devices (RCD) upstream of the APS are rated
for the maximum earth leakage current of the rectifiers. If necessary, install
higher rated RCD(s).
The maximum earth leakage current of Access Power Rectifiers is given in the
Specifications on page
