26 S&C Instruction Sheet 515-600
Field Adjustment and Programming
STEP 4.
If
CONFIG: LOCKOUT OPTION
setting has been factory-set for Internal
mode, set the lockout level of the Micro-AT con trol using the following
procedure:
(a) Press the CURRENT menu key. The following dis play will appear:
Current Menu
Table 2. Field-Adjustable Items in the Voltage Menu
Field Adjustable Item
VOLTS:
Description
Displayed If
Operating Range
①
LOSS OF SOURCE
Voltage level on source serving the load which, if reduced
below, will result in control initiating automatic loss-of-
source transfer . Also, if the
Hold return option has been
selected, the voltage level on an alternate source which,
if reduced below, will result in control initiating automatic
return-of-source transfer
Displayed at all installations
10-105 Volts
(85 Volts)
RETURN OF SOURCE
Voltage level on source formerly serving the load which,
if equaled or exceeded, will result in control initiating
automatic return-of-source transfer . (Applicable only if the
Auto or Window return option has been selected)
Displayed at all installations
100-120 Volts
(105 Volts)
OVERVOLT DETECT
Voltage level on a source which, if equaled or exceeded,
will result in the control posting an entry in the event log
Displayed at all installations
120-140 Volts
(135 Volts)
UNBALANCE DETECT
Unbalance level on source serving the load which, if
equaled or exceeded, will result in control initiating auto-
matic transfer . Also, if the
Hold return option has been
selected, unbal ance level on alternate source which,
if equaled or exceeded, will result in control initiating
automatic return transfer
CONFIG: UNBALANCE
INSTALL
has been factory-set for “IN”
12-60 Volts
(18 Volts)
CURRENT:
PRESS LAST/NEX T ITEM
(b) Press the NEXT item key. The following display will appear for CURRENT:
LOCKOUT LEVEL:
CURRENT: LOCKOUT LEVEL
1200 AMPS
CHANGE
The lockout level has been factory set for 1200 amperes but may be field-
adjusted to any value between 200 and 1500 amperes.
(c) Is the factory setting appropriate for this installation? If not, change it.
Note:
The
Lockout Level s
etting should take into account the emergency peak-load
current of the system to preclude nuisance lockouts.
If the lockout level is to be set to some other value, press the CHANGE
key. If the display prompts to reenter the access-code number, do so. The
display will now look like this:
CURRENT: LOCKOUT LEVEL
1200 AMPS
– – – –
Enter the desired lockout level. If, for example, 600 amperes is the desired
value, the “6,” “0,” and “0” keys would be pressed, followed by the ENTER key.
The display will change to:
CURRENT: LOCK OUT LEVEL
600 AMPS
CHANGE
①
Factory settings are shown in boldface type .
