Trane Starters Engineering Bulletin page 67

When the SMP option is selected, the medium voltage starter must be remote.
Note: Additional "top hat" provisions may need to be field-supplied to allow for shielded cable
DMP , Differential Motor Protection (selectable with the SMP option).
zero-sequence ground fault protection. Instead, it uses a flux-summation, self-compensating
differential protection scheme for a quicker and more precise removal of line power during a fault
(see
Note: DMP is available only for 1,062 kW and larger motor sizes up to 5,000 volts.
Figure 47. Supplemental motor protection enclosure with DMP option
1
1. Lightning arrestors
2. Surge capacitors
3. SEPAM module (Square D Electrical Protection and Metering)
Implications of the Enhanced Electrical Protection Package and SMP option on
customer-supplied starters (SBO).
the customer who wishes to use a non-Trane starter are provided with the Enhanced Electrical
Protection Package and the SMP option.
Note: Trane-supplied starters already include these items.
The supplemental motor-protection enclosure will include:
•
The oversized control panel will include:
•
•
•
CTV-PRB004-EN
with stress cones (field-provided).
"Differential motor protection, " p.
2
Primary, single-stage current transformer in lieu of primary and secondary CTs
Second-stage PTs, 115 to 30 volts, for medium-voltage applications only
Three-pole disconnect
Industrial terminal block for field control and control-power connections
75).
3
Most of the accommodations that would need to be met by
Starter Options
DMP replaces the
67