Eaton Powerware 3G System SC200 Installation And Operation Manual page 22

3G-SC200 Data-Voice-Video Power Solutions Installation Guide
Step 2 - Check high AC voltage protection at the site
Step 3 - Check the type of AC supply, disconnect device and RCDs
16
Check if the AC voltage is expected to exceed 275V (L-N).
1
If so, then it is strongly recommended that an external high voltage
2
protection unit (HVPU) be installed. This will automatically disconnect
the AC at high voltage and reconnect it at normal voltage.
Install the HVPU as in the following diagram.
3
Connect the High VAC alarm output to one of the Digital Inputs on the
4
I/O board (see diagram on page 4 for location).
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
DV2-3G DC power system
Check the type of AC supply. Only the types of AC supply listed in the
1
Specifications on page 59 are suitable for the DV2-3G.
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.
Check that the DV2-3G will be connected to a suitable upstream AC
2
disconnect device such as Miniature Circuit Breaker(s) (MCB) or fuses.
Check the disconnect device will isolate both the phase and neutral
3
conductors in single-phase and three-phase connections, unless the
neutral conductor is clearly identified.
Check that any Residual Current Devices (RCD) upstream of the DV2-
4
3G 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 59.
Copyright © 2005-2007 Eaton Corporation. All Rights Reserved.
IPN 997-00012-54A
YH3
Secondary transient protection devices
(MOVs)
I/O board
SC200 system controller
Rectifiers
July 2007