GE Industrial Solutions SPSAA - Manual (Page 4)

GEH-6253 Installation Instructions
Supplemental 24Vdc input terminals are provided for
systems that have access to an external +24Vdc power
supply. If this supplemental input is connected, the
assembly will continue to pass the control power to
breakers and accessories connected to the Distribution
Cable System if the primary AC power is lost or drops
below the 85Vac minimum requirement. This backup
input must meet ANSI C37.90.1 for oscillatory and fast
transient surges (the Power Supply Assembly provides
this protection for the primary AC input).
Additional 24Vdc output connections are supplied for
applications where +24Vdc control power is required
independent of the Distribution Cable System (i.e. feeding
an Air Circuit Breaker or Insulated Case Breaker with a
MicroVersaTrip
® PM/Plus or EntelliGuard TM TU Trip Unit).
NOTE: THE POWER SUPPLY ASSEMBLY IS SIZED FOR A
MAXIMUM OF 20 BREAKERS. Use of the Power Supply
Assembly to provide voltage sensing signals and/or
+24Vdc control power to a main Air Circuit Breaker or
a main Insulated Case Breaker with a MicroVersaTrip
®
PM/Plus or EntelliGuard TM TU Trip Unit reduces the
total quantity of 20 Spectra ® RMS Molded-Case Circuit
Breakers with microEntelliGuard TM or MicroVersaTrip ®
PM/Plus Trip Units by one. The overall maximum cabling
length of the system remains 40 feet.
The Power Supply Assembly contains five connection
points. The following list contains a description and
type of connection points.
• “To Distribution Cable”
– 12-pin plug connector that mates with the 12-pin
receptacle of a Distribution Cable Harness (catalog
number SDCHA11, SDCHA30 or SDCHA60).
• “To Voltage Conditioner”
– 12-pin plug connector that mates with the 12-pin
receptacle of a Distribution Cable Harness (catalog
number SDCHA11, SDCHA30 or SDCHA60). For
Spectra
® RMS Molded-Case Circuit Breakers with
MicroVersaTrip ® PM Trip Units, the other end of
the harness MUST connect to either a Voltage
Conditioner Assembly (catalog number SVCAA)
or a Voltage Conditioner Plate (catalog number
SVCA120Y, SVCA208Y, SVCA240D, SVCA277Y,
SVCA480Y, SVCA480D or SVCA600D) for the breaker
to function properly.
• “Input”
– Three-screw terminal block for connection of the
primary AC source (85Vac to 240Vac @ 50/60 Hz)
AND a ground connection.
• “Output to 24Vdc”
– Two-screw terminal block for optional control power
output (in lieu of using the Distribution Cable System).
• “Supplemental Input 24Vdc”
– Two-screw terminal block for connection of an
external +24Vdc power supply.
By plugging the Power Supply Assembly into the
Distribution Cable System, you create system wide
signals that are available to all breakers connected to
the system; a list of those functions appears in Table 2.
Table 2. Signals Available on the Distribution Cable System by
connection of the Power Supply Assembly.
Spectra ® RMS ™ Breaker
with microEntelliGuard™ or
MicroVersaTrip ® PM Trip Unit
Spectra ® RMS Breaker with
MicroVersaTrip ® Plus or
microEntelliGuard™ with
Basic Metering Trip Unit
Control Power (+24Vdc) Control Power (+24Vdc)
Control Power (-common) Control Power (-common)
Dimensions, Weights and Wiring Diagrams
A Power Supply Assembly dimensioned drawing is
provided in Figure 3 to assist in mounting the assembly.
The maximum unit weight is two and a half pounds.
Figure 3. Dimensioned drawing of the Power Supply Assembly
(dimensions shown in inches).