Atlas Copco ZT 55 VSD - Settings of safety valves; Overload relay and fuse settings; Reference conditions; Limitations

• Short-circuit current: 10 kA
a. Maximum allowed rated conditional short-circuit current (IEC61439-1) of the electrical
power network.
b. Short circuit current rating (NEC and UL508A). Short circuit current rating applies for
Copper Stranded wire 75/90 °C only
9.3 Settings of safety valves
Settings
Reference Set pressure 60 Hz
Intercooler safety valve 54 psig
High-pressure safety valve 160 psig
9.4 Overload relay and fuse settings
Type V Hz Approval Setting
Q15/F15
(A)
ZT 55 VSD 460 60 UL/cUL 7.3
9.5 Reference conditions
Reference Unit Value
Absolute inlet pressure bar(a) 1
Relative air humidity % 0
Air inlet temperature ˚C 20
9.6 Limitations
Maximum air inlet temperature 40 ˚C
Maximum air inlet temperature for high ambient temperature version (HAT) 50 ˚C
Minimum ambient temperature 0 ˚C
Maximum relative humidity of ambient air 100 % at temperatures
below 35 ˚C (95 ˚F), 70
% at 40 ˚C (104 ˚F)
Maximum altitude operation (see note) 1000 m
Minimum working pressure 4 bar(e)
Instruction book
API797429 75