CTV-PRB004-EN 67
Starter Options
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
with stress cones (field-provided).
DMP, Differential Motor Protection (selectable with the SMP option). DMP replaces the
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 “Differential motor protection,” p. 75).
Note: DMP is available only for 1,062 kW and larger motor sizes up to 5,000 volts.
Implications of the Enhanced Electrical Protection Package and SMP option on
customer-supplied starters (SBO). Most of the accommodations that would need to be met by
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:
• Primary, single-stage current transformer in lieu of primary and secondary CTs
The oversized control panel will include:
• 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
Figure 47. Supplemental motor protection enclosure with DMP option
1. Lightning arrestors
2. Surge capacitors
3. SEPAM module (Square D Electrical Protection and Metering)
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CTV-PRB004.book Page 67 Sunday, December 18, 2011 6:39 PM
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