Matrix Telecom Inverter System
60
Copyright © 2008-2010 Eaton Corporation. All Rights Reserved.
IPN 997-00012-68D February 2010
MBS Switch Positions
The MBS has five positions:
• Mains bypass, MBP
• Mains static switch, MSS
• Normal operation, NORM
• Inverter static switch, ISS
• Inverter bypass, IBP
The MBP and IBP positions are used to insert or remove the STS module without load power
interruption.
The MSS and ISS positions are for Inverter maintenance and Mains AC maintenance,
respectively.
The NORM position is the primary operation position for the system. In this position the output
power will never be interrupted except if both Mains AC and the inverters are unavailable.
To maintain an inverter module, or inverter input or output connections, you can switch from
NORM to the MSS position, this guarantees the continuity of output power. Alternatively,
switch from NORM to the ISS position, to maintain the Mains AC input without load power
interruption.
For maximum reliability of the supply make sure the MBS is in NORM position when
maintenance is required.
The following table shows detail of the MBS switch positions.
Note:
1 Do not change MBS position immediately after the STS is inserted into the system. Wait at
least 5 seconds before any change.
2 Make any changes slowly. Leave the MBS in one position for at least 1 second so that the
STS has enough time to detect the MBS position via the MBS auxiliary contacts.
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