Starter Work
CVRF-SVN005C-EN 41
CT Work
WARNING
Hazardous Voltage w/Capacitors!
Failure to disconnect power and discharge capacitors
before servicing could result in death or serious injury.
Disconnect all electric power, including remote
disconnects and discharge all motor start/run
capacitors before servicing. Follow proper lockout/
tagout procedures to ensure the power cannot be
inadvertently energized. For variable frequency drives
or other energy storing components provided by Trane
or others, refer to the appropriate manufacturer’s
literature for allowable waiting periods for discharge of
capacitors. Verify with a CAT III or IV voltmeter rated per
NFPA 70E that all capacitors have discharged.
WARNING
PPE for Arc/Flash Required!
Failure to wear appropriate PPE could result in death or
serious injury. On this unit, if the handle shield is
cracked the circuit breaker could arc/flash when reset.
To avoid being injured, technicians MUST put on all
necessary Personal Protective Equipment (PPE), in
accordance with NFPA70E for arc/flash protection,
PRIOR to entering the starter panel cabinet.
The existing CTs can be reused for UCP2.
This is true for
applications with a single CT or two CTs per phase. The output
of both CT applications is in the 100 mA range that the
Symbio™ starter module requires.
When reusing CTs it may be necessary to confirm all the
p
olarity of existing wiring is correct per these instructions.
In some cases starters shipped with ammeters.
The meters
can remain if they have their own CTs.
When using existing CTs having a nominal chiller current to 5
a
mp ratio (i.e., 200:5), it is necessary to install or have ordered
secondary CTs. In this case, two CTs are used per phase to
either achieve the necessary turn-down or for metering
convenience. The first stage consists of either the
X13580271010 (TRR01287), X13580272010 (TRR01288),
X13580048010 (TRR00448) and X13580048020 (TRR00449)
(each of these CTs have a 5 amp secondary). The second
stage consists of small CT transformers that reduce the
nominal 3.6 amp signal to the 100 mA value used by the starter
module. The existing 5 amp CTs cannot be used if they do not
match the required ratio in Table 9, p. 40.
The part number on the secondary CT is X13580266-01, Trane
p
art number TRR00975, three required per starter.
667-1000 TRR01405 40:00.1 1000 2.5 3.95 1 1000
964-1400 TRR01597 20:00.1 1400 3.5 5.25 1 1400
1200-1800 TRR01580 00:00.1 1800 4 6.5 1 1800
(a) Refer to Figure 55, p. 40 for location of diameter A and B.
Table 9. CT specifications for single transformer per phase (continued)
Actual Motor
RLA (A) CT Part Number CT Ratio (A:A) CT Rating (A)
Diameter
(a)
(inches)
Primary
Turns
CT Meter
ScaleInside A Inside B
Table 10. CT specifications for two transformers per phase
Actual Motor
RLA (A)
Primary CT
Number
Second CT
Number CT Ratio (A:A) CT Rating (A)
Inside Dia.
(inches) Primary Turns CT Meter Scale
8.0-12.0 TRR01288 TRR00975 50:05:00 50 1.25 3 12
12.0-18.0 TRR01288 TRR00975 50:05:00 50 1.25 2 18
18.0-27.0 TRR01289 TRR00975 75:05:00 75 1.25 2 27
24.0-36.0 TRR01288 TRR00975 50:05:00 50 1.25 1 36
36.0-54.0 TRR01289 TRR00975 75:05:00 75 1.25 1 54
48.0-72.0 TRR01287 TRR00975 100:05:00 100 1.75 1 72
24.0-36.0 TRR00448 TRR00975 150:05:00 150 2.5 3 36
28.8-43.2 TRR00448 TRR00975 180:05:00 180 2.5 3 43.2
36.0-54.0 TRR00448 TRR00975 150:05:00 150 2.5 2 54
43.2-64.8 TRR00448 TRR00975 180:05:00 180 2.5 2 64.8
48.0-72.0 TRR00448 TRR00975 200:05:00 200 2.5 2 72
60.0-90.0 TRR00449 TRR00975 250:05:00 250 2.5 2 90
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