CTV-PRB004-EN
45
Medium-Voltage Starter Types (10,000–13,800 Volts)
Table 7, p. 31
, shows the available medium-voltage starter types for 10,000–13,800 volts.These are
identical in nature to their 2,300–6,600-volt counterparts in terms of inrush current, starting torque,
and their inherent advantages/disadvantages. Enclosure sizes are larger due to incoming line
provisions, internal components, and electrical shielding. These starters are available in remote-
mounted options only due to electrical restrictions associated with these higher voltages.
Note:
UL certification of these starters is not available due to AC voltage ranges exceeding
7,200 volts as specified in UL Standard 347. This includes all chiller starter manufacturers
selling 10–13.8 kV refrigeration equipment. Low-voltage sections of the starters are UL rated
as applicable.
Which starter type is best?
In terms of starting torque and inrush current, these starters share the same advantages and
disadvantages similar to the 2,300–6,600-volt starters.The major difference for 10–13.8 kV starters
is the increased floor space required. If PFCCs are required, the dimensions will further increase
because the capacitors require their own separate enclosure. All starters are NEMA 1 rated as
standard and conform to ANSI/NEMA ICS-6 enclosure standards unless otherwise noted.
Medium Voltage—Across-the-Line (10–13.8 kV)
Across-the-Line Starter (10,000–13,800 volts)
Starting sequence
Refer to the across-the-line starting sequence (
“Starting sequence,” p. 32
).
Standard features
•
4 kVA control-power transformer
•
Primary and secondary current transformers (CTs)
•
Potential transformers (PTs)
•
Grounding provisions
•
Bolted line-power connections
•
Bolted load-side connections for remote starters
•
Standard motor protection
Dimensions
Typical dimensions for a remote-mounted across-the-line starter are shown in
Figure 34, p. 46
.
PFCCs, if required, are housed in a 36-inch wide auxiliary cabinet (not shown). Always consult the
submittal drawings for as-built dimensions.
Environmental specification
•
Designed, developed and tested in accordance with IEC 60470, 62271-200
•
NEMA 1 enclosure as standard
•
Operation from sea level to 6,000 ft (1,829 m)
•
Operating ambient temperature range 32°F to 104°F (0°C to 40°C)
•
Relative humidity, non-condensing 5 percent to 95 percent
•
Non-operating ambient temperature range -40°F to 158°F (-40°C to 70°C)
•
Voltage utilization range ±10 percent
CTV-PRB004.book Page 45 Sunday, December 18, 2011 6:39 PM
