Alpha Technologies INEX Inverter System - Manual (Page 28)

Argus Technologies Ltd. 014-114-C0 Rev D WC
Printed in Canada. © 2008 Argus Technologies Ltd. ARGUS and INEX are registered trademarks of Argus Technologies Ltd. All Rights Reserved. Page 18 of 43
6. Replace rear cover(s) once all connections have been
completed.
7. Screw the system ground wire on the rear cover with the
supplied cross hex-washer type nickel screw.
CAUTION STS is not hot swap without MBS.
When installing STS module with MBS it is not necessary to turn off the system. However, the
incorrect install/removal action will damage the STS module frame because of the safety lock of
the MBS.
Proceed as follows: put switch at MBP or IBP position (Determined by mains and inverter output
status) as shown:
MBP position: IBP position:
4.8.1 Position Status of MBS
The operation mode of STS is closely associated with the position of MBS. The MBS has two main connectors
and three assistant connectors. The signals generated by three assistant connectors are passed to DSP for
position status detection. There are five valid positions:
1. MBP –
U
m
U
ains
U
b
U
y
U
p
U
ass
2. MSS –
U
m
U
ains
U
s
U
tatic
U
s
U
witch (for mains maintenance)
3. NORM –
U
norm
U
al operation
4. ISS –
U
i
U
nverter
U
s
U
tatic
U
s
U
witch (for inverter maintenance)
5. IBP –
U
i
U
nverter
U
b
U
y
U
p
U
ass
STS will continuously detect the position of MBS in order to decide the transferring action between different
modes.
When the STS is powered on, it will judge whether the present position of MBS is valid. If the status is invalid,
STS will consider MBS not well connected, and it will not enter any types of operation mode until the detection
signal becomes normal.
If MBS is changed when STS runs at one of the five valid positions, and this change happens between two
adjacent positions, the STS will transfer to different mode based on current status. Otherwise, the STS will not
take any action.
For example, if MBS is set at P3, STS will take action when MBS is turned to P2 or P4.