4
15272 Newsboy Circle
Huntington Beach
California 92649
Phone: 714-751-0488
Fax: 714-856-9679
E-Mail: [email protected]
PoweringTheNetwork.com
B) Breaker Removal
The front panel must be removed in order to remove any breaker.
It is not necessary to remove the toggle guard in order to remove
the front panel.
A special extraction tool (with screws) has been provided to
facilitate breaker removal without putting unnecessary lateral
stress on the internal sockets and mating clips. Screw the breaker
extraction screws part way in, then use the tool to pull the breaker
firmly out (as shown in FIGURE 2).
FIGURE 2: Circuit Breaker Extraction
C) Remote Summary Alarm Wiring
A connector at the rear of the panel enables optional installation
of a remote summary alarm to indicate when any breaker has
been over-current tripped. Separate contacts are provided for
each bus to activate Bus A and Bus B alarms independently, if
desired (Bus A only for model DST-10). The alarm contacts are
configured Normally Open (N.O.) and close when a breaker is
tripped (not when shut off manually—see Circuit Breaker Function
section). Diagrams on each side of the connector (labeled
“BREAKER STATUS”) in the center of the rear panel illustrate the
contactor positions when any breaker in the bus is in a TRIPPED
state.
A 35" four wire connector harness is provided for remote alarm
indication (two wires for each bus). One of two different versions
have been supplied:
1)
Orginal version: Molex connectors at both ends for compatible
connection with the earlier PMF-400 Power Function Manager
(LVD, Digital Meter: volts/amps, load distribution, alarms). For
application not involving a PFM-400, clip-off one of the connectors
and use parallel splices and 18 AWG wire to connect the DST
alarm contacts to your monitoring system.
2)
Later version: Molex connector on one end and pigtail on
opposite end.
PFM-400 Wiring:
For version 1 alarm harness, plug one end of the
harness into the keyed connector on the rear of the DST which is
labeled BREAKER STATUS. Note, the harnes is reversible, therefore
it does not matter which end is plugged in. Plug the other end into
an unused STATUS CONTACT INPUT connector on the rear of the
PFM. (Typically, the #5/#6 connector will be used when Power
Modules are connected to the PFM, but the summary alarm will
function the same in either the #1/#2 or #3/#4 connector positions,
as well).
PFM-500 Wiring:
For version 2 alarm harness, plug the connector
end of the harness into the keyed connector on the rear of the DST
which is labeled 'BREAKER STATUS'. The pigtail end can be wired
to an unused STATUS CONTACT input on the rear panel of the
PFM-500; connect the Blue and Yellow wires (DST-10) to terminals
#1 and #3. For a DST-20A, parallel Brown and Blue wires and
connect to terminal 1 and parallel Orange and Yellow wires and
connect to terminal #3.
If all STATUS CONTACT positions are occupied (PFM-400) or wired
(PFM-500) (i.e., five or six Power Modules are in the system),
and a summary alarm from the DST is required, this may be
accomplished through parallel wiring of the status wires. Please
contact the factory for information on how to perform this
modification.
Note:
Although the breaker status contacts in the DST operate in
a Normally Open configuration, the summary alarm contacts
within the PFM are Form C; that is, the connector labeled OUTPUT
SUMMARY ALARM on the rear of the PFM may be wired in either
Normally Open or Normally Closed configuration.
When wired to the PFM in this fashion any tripped breaker within
the DST will result in illumination of the CHECK SYSTEM light on
the front of PFM, as well as activation of the PFM summary alarm
contacts. For additional information on PFM operation, refer to the
manual provided with that product.
Caution:
Status contact wiring cannot be paralleled in
applications where the A and B buses are of different voltages or
have a different ground reference.
Power through the alarm contacts must not exceed the following:
1 amp @ 125 VAC
5 amps @ 30 VDC
VI) CIRCUIT BREAKER FUNCTION
The plug-in circuit breaker functions as an on/off load switch and
provides over-current protection specified by its amperage rating.
However, the special mid-trip feature enables the technician to
distinguish between a condition where the breaker has been
tripped by over-current and where it has been intentionally
shut off.
When the circuit breaker is manually shut off, the alarm contacts
within the DST will remain in the “OPEN” position, to avoid setting
off alarms unnecessarily when load disconnect is intentional.
When the breaker is over-current tripped, the toggle will rest at a
90 degree position (for easy identification of the tripped circuit),
and the alarm contacts will be in the “CLOSED” position. To reset,
(after the overload condition has been corrected) simply switch
the breaker off and back on again. To test the alarm, place a PBA
breaker in the 'ON' position and slam the bottom of the breaker
Plug-In Breaker
Extraction Tool
Breaker
Extraction
Screws