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Sm@rtGear™ IE User Manual
• Electrical interlock
• Siemens ITC 2200 HMI with 22" touch screen
10.4.2 Optional Components and Features
Optional features and components include:
• Hot swappable S7-400 PLC for additional system redundancy
• Sync relay check 25M allowing for closed transfer
• External relays (27/59,81O/U,47)
–
If the integral WL breaker relaying capability is not utilized
• Redundant hard switches (in addition to standard HMI soft
• switches) for breaker control
• Redundant indicating lights
–
Source available (Preferred/Alternate)
–
Control power available (Preferred/Alternate)
–
Breaker condition (Open/Closed)
• Redundant selector switches
–
Manual/Auto mode
–
Breaker operation – in manual mode
10.5 Setpoints/Controls Screen
The setpoints screen allows the operator to define the setpoints for the system. The first column is the setpoint and the second
countdown column is visible only when the timer is active. The second column is purely for countdown purposes.
Any of the setpoints can be viewed or changed; they are password protected to prevent tampering. Each setpoint has
preprogrammed high and low limits to ensure that a chosen value is within an acceptable range.
The setpoints and timers that are operator configurable are shown below:
10.5.1 Timer Setpoints
TDOX – Open transition timer
TDFC – Time delay before breaker "fail to close" alarm
TDFT – Time delay before breaker "fail to trip" alarm
TDFS – Time delay for "fail to synchronize" alarm
TDOL – Maximum safety time limit for paralleling sources in Automatic mode
TDNE-M1 – Time delay on transfer from primary to secondary source in order to override momentary outages
TDEN-M1 – Retransfer time delay from secondary to primary source
TDNE-M2 – Time delay on transfer from secondary to primary source in order to override momentary outages
TDEN-M2 – Retransfer time delay from primary to secondary source
TDVF – Time delay on transfer from primary in order to override any momentary outages
TDVA – Time delay from primary. Primary voltage normalized
TDCD – Time delay to keep engine running after start signal is removed
TDVF-S2 – Time delay for generator to come up to voltage and frequency
10.5.2 Selector Switches
In addition to the operator specified timers, there are four selector switches on the autothrowover Setpoints/Control screen. The
function of each selector switch is described below:
System Mode – Auto or Manual – Dictates whether protective relays or an operator controls the transition from primary to secondary
sources. Auto mode requires no operator interaction with the system once timers and protective relay settings are defined. All source
transfers occur automatically based on these predefined values. Manual mode gives the operator complete control of the system and
disables all automatic functions.
Retransfer Mode – Auto or Manual – Dictates whether protective relays or an operator controls the transition from secondary to
primary sources. Auto mode requires no operator interaction with the system once timers and protective relay settings are defined.
All source transfers occur automatically based on these predefine values. Manual mode gives the operator complete control of the
system and disables all automatic functions.
Transition Mode – Open or Closed – Dictates the mode of transition between sources. Note that for closed transition the optional
protective relays must be installed. This selector switch will only function in systems that have the capability for closed transition;
otherwise it will be locked in the open state.
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