32 S&C Instruction Sheet 515-600
Operational Testing
Before Walking Away
So the source-transfer control is ready for auto matic operation, verify the following:
• The manual/automatic operation selector switch is in
Automatic
mode.
• If the
Supervisory Control
option is enabled, the Supervisory manual/automatic
dry contact is closed.
• The left source voltage and right source voltage indi cating lamps are illuminated,
indicating the avail ability of voltage on the sources.
• The automatic-transfer READY indicating lamp is illuminated.
Conditions required to light automatic-trans fer READY indicating lamp:
1. Manual/automatic operation selector switch is in
Automatic
mode.
2. If the
Supervisory Control
option is enabled—the Supervisory manual/automatic
dry contact is closed.
3. The LOCKOUT lamp is reset (if the
Lockout
option has been factory-selected).
4.
Unbalance Detection
feature is “On” (if the unbalance install has been factory-
selected).
5. Switch operators are coupled to switches.
6. Preferred-source switch is closed and alternate-source switch is open.
If the display is not being used to show menu information, it will show mes-
sages explaining why the automatic-transfer READY indicating lamp isn’t lit.
Note:
If the automatic-transfer READY indicating lamp is not lit, it does not necessarily
mean that the control is inoperative. For example, when a loss-of-source transfer
occurs, the lamp extinguishes but the control is ready for any subsequent pro grammed
automatic operation required by a change in source conditions. Likewise, if the
switch operators are decoupled, the lamp is extinguished—and the switches will not
operate—but the control is fully operative.
