Specifications
5.2.3. Electrical specifications
Electrical
Rating
Input Power (kW)*
Maximum
Current (A)*
Dedicated Circuit
Breaker (A)
Maximum Steady State
220/230 VAC
60 Hz
9.5 8.0 32 40
460 VAC
60 Hz
9.8 8.4 14 25
200/220 VAC
50 Hz
9.0 7.8 30 40
380/420 VAC
50 Hz
9.2 7.9 16 25
*Measurement tolerance is +/- 5%
5.2.4. Operating parameters
Parameter Value
Ambient temperature range* 45 °F to 100 °F 7 °C to 38 °C
System helium pressure
220 ± 5 psig @ 60 Hz
250 ± 5 psig @ 50 Hz
15.2 ± .34 bar @ 60 Hz
17.2 ± .34 bar @ 50 Hz
Acceptable location Indoors only
Maximum altitude for use 6560 ft 2000 m
Environment Pollution Degree 2
Installation Category II
Maximum relative humidity
80% for T< 88 °F
Decreasing linearly to
50% at 104 °F
80% for T< 31 °C
Decreasing linearly to
50% at 40 °C
Water cooled maximum sound level 70 dBA at 1 meter
Cold head maximum load
1
st
stage heat exchanger
22 lb 10 kg
Cold head maximum load
2
nd
stage heat exchanger
(if applicable):
11 lb 5 kg
*The compressor package is designed to operate in an ambient temperature range from
45 F to 100 F (7 C to 38 C). If the temperature is below 45 F (7 C), the increased viscosity of
the oil could prevent start-up and/or cause poor lubrication. Operation above 100 F (38 C) will
cause overheating and subsequent problems. If a unit must be subjected to either extreme, written
authorization from Cryomech, Inc. must be granted.
5.2.5. Safety Devices
Several safety devices are located inside the helium compressor package and on the cold head.
They are monitored by the helium compressor package’s control panel to maintain a safe working
environment and protect the helium compressor package and cold head from developing extreme
conditions that can cause damage, see Section 7 for further detail. The safety devices listed below
are not monitored by the helium compressor package’s control panel.
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