GE Industrial Solutions MX350 Instruction manual - Manual (Page 90)

5–16 MX350 AUTOMATIC TRANSFER CONTROL SYSTEM – INSTRUCTION MANUAL
CONTROL CHAPTER 5: SETPOINTS
Control
General
Select the Home > Setpoints > Control > General page to edit the controller setpoints.
The general control screen allows the user to set up the following operating parameters:
•
Selection of Preferred Source: typically S1 (utility power) is the preferred power source.
• Auto/Manual: An Automatic Transfer Switch can be set up for the following types of
transfers:
–
Automatic (both from S1 to S2 and from S2 to S1)
– Manual S1 to S2, S2 to S1, also known as S12
– Manual S2 to S1 Only, also known as S5
NOTE
NOTE: These selections are not available on a switch that is designed for manual operation only!
Figure 11: General control configuration setpoints
Commit transfer to S2 (S13): If this option is enabled, then the switch will transfer to
Source 2 once the W timer has begun timing, even if Source 1 returns before the transfer
takes place. This feature can be used to ensure that the transfer takes place, because one
brief outage may be followed by another outage.If this option is disabled, the switch will
only transfer if the duration of the outage is still present when the W timer has expired.
This option should be disabled, when empirical data suggests that a typical outage is an
isolated event.
Preferred source The Preferred Source is the source of power that the controller will try to connect to the
load, if both sources are available. Either source 1 (generally utility power) or source 2
(generally generator power) can be selected as Preferred Source. Typically, utility power is
the preferred source to power the ATS load.
Auto-Manual select
NOTE
NOTE: This is not available for Manual type switches.
Three choices are presented for the Auto Manual Select:
•
Automatic: In Automatic mode the MX350 will automatically control all load transfers
from S1 to S2, or from S2 to S1.