Current Menu - S&C MIcro-AT Installation, Programming, And Operation Manual

Field Adjustment and Programming

Current Menu

Table 2. Field-Adjustable Items in the Voltage Menu
Field Adjustable Item
VOLTS:
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
LOSS OF SOURCE
selected, the voltage level on an alternate source which,
if reduced below, will result in control initiating automatic
return-of-source transfer
Voltage level on source formerly serving the load which,
if equaled or exceeded, will result in control initiating
RETURN OF SOURCE
automatic return-of-source transfer . (Applicable only if the
Auto or Window return option has been selected)
Voltage level on a source which, if equaled or exceeded,
OVERVOLT DETECT
will result in the control posting an entry in the event log
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
UNBALANCE DETECT
selected, unbal ance level on alternate source which,
if equaled or exceeded, will result in control initiating
automatic return transfer
Factory settings are shown in boldface type .
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26 S&C Instruction Sheet 515-600
If CONFIG: LOCKOUT OPTION setting has been factory-set for Internal
STEP 4.
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:
Description
(b) Press the NEXT item key. The following display will appear for CURRENT:
LOCKOUT LEVEL:
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 setting 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:
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:
Displayed If
Displayed at all installations
Displayed at all installations
Displayed at all installations
CONFIG: UNBALANCE
INSTALL
has been factory-set for "IN"
CURRENT:
PRESS LAST/NEX T ITEM
CURRENT: LOCKOUT LEVEL
1200 AMPS
CURRENT: LOCKOUT LEVEL
1200 AMPS
CURRENT: LOCK OUT LEVEL
600 AMPS
Operating Range
10-105 Volts
(85 Volts)
100-120 Volts
(105 Volts)
120-140 Volts
(135 Volts)
12-60 Volts
(18 Volts)
CHANGE
– – – –
CHANGE
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