Quincy Compressor QGD 40 - Protection Settings Details; Dryer Switch Settings

• I = 128 A + 25 % = 128 x 1.25 = 160 A
• For AWG2/0, the maximum current is 175 A, which is sufficient => use AWG2/0
• Install the prescribed maximum fuse (150 A) on each cable
• Parallel supply cable (2 x 3 phases + 2 PE - configuration (2)):
• I = (128 A + 25%)/2 = (128 x 1.25)/2 = 80 A
• For a AWG4, the maximum current is 85 A x 0.8 = 68 A, which is insufficient. For an
AWG3, the maximum current is 100 x 0.8 = 80 A. So 2 parallel cables of 3 x AWG3 + 2
x AWG8 are sufficient.
• Install 80 A fuses on each cable.
8.3 Protection settings
Setting motor overload relay (F21)
Frequency (Hz) Voltage (V) 40HP F21 (A) 50HP F21 (A) 60HP F21 (A)
UL/cUL
60 230 67.9 77.0 96.3
50 380 40.2 47.8 57.1
60 380 40.9 48.5 58.4
60 460 33.9 39.8 48.5
60 575 27.4 31.9 38.5
Settings for fan motor overload protection (Q15)
Frequency (Hz) Voltage (V) 40HP Q15 (A) 50HP Q15 (A) 60HP Q15 (A)
UL/cUL
60 230 4.2 4.2 5.8
50 380 2.8 2.8 2.8
60 380 2.4 2.4 3.5
60 460 2.4 2.4 3.2
60 575 1.9 1.9 2.6
8.4 Dryer switches
General
The regulating and safety devices are factory-adjusted to give optimum performance of the dryer.
Do not alter the setting of any of the devices.
Instruction book
2920 7190 02 101