Trane CVHE Troubleshooting

CVHE-SB-32A 86
Starter Module CT Voltage and Currents
There are two configurations of CTs used. One is the single stage, the other is the dual stage. A
different transfer function exists depending on whether a single or dual stage configuration is
used. The two configurations appear the same to the UCP2 by normalizing each. Thus a different
equation is used to take the actual line current and convert it to a common ‘Normalized Line
Current’ that may be used in Table 23 . Note that the ‘Terminal Volts’ is the AC voltage seen at
the current input terminal pairs of the Starter module. These pairs are J5-1,2, J5-3,4 and J5-5,6.
For a single stage CT:
Normalized Line Current (%) = Actual Line Current(Amps)*100%*Primary Turns CT-Rated
Primary Current (Amps)
For a two stage CT:
Normalized Line Current (%) = Actual Line Current(Amps)*138.89%*Primary Turns Line CT
Rated Primary Current (Amps)
Table 23-Current Input Transfer Function
Normalized
Line
Current
Terminal
Input Current
(mA RMS)
Terminal
Volts (V RMS)
(± 5%)
Normalized
Line
Current%
Terminal
Input Current
(mA RMS)
Terminal Volts
(V RMS) (±
5%)
0 0 0 115 115 4.23
5 5 1.19 120 120 4.36
10 10 1.37 125 125 4.49
15 15 1.53 130 130 4.62
20 20 1.67 135 135 4.75
25 25 1.81 140 140 4.88
30 30 1.95 145 145 5.02
35 35 2.09 150 150 5.15
40 40 2.23 160 160 5.41
45 45 2.36 170 170 5.67
50 50 2.50 180 180 5.94
55 55 2.63 190 190 6.20
60 60 2.77 200 200 6.46
65 65 2.90 210 210 6.72
70 70 3.03 220 220 6.99
75 75 3.17 230 230 7.25
80 80 3.30 240 240 7.51
85 85 3.43 250 250 7.77
90 90 3.57 260 260 8.03
95 95 3.70 270 270 8.29
100 100 3.83 280 280 8.56
105 105 3.96 290 290 8.82
110 110 4.10 300 9.08

Trane CVHE Specifications

General

Brand	Trane
Model	CVHE
Category	Chiller
Language	English