HT4001 Instruction Manual
3-4
PRE-INSTALLATION
GROUNDING REQUIREMENTS
Properly ground the HT4001 system for personal safety and to prevent emission of
high-frequency interference. See Appendix F for system grounding requirements.
Connect the worktable to a high-quality earth ground from within 20 feet (6 m) of the
table. A suitable ground consists of a solid copper rod of at least 3/4-inch (19 mm)
diameter driven to a depth of at least 15 feet (4.5 m) into the earth. This will allow
ample grounding only if you reach a permanent moisture level. If soil conditions
provide no permanent moisture level, drill a 6-inch (152 mm) hole to a depth of 15 feet
(4.5 m) and place a 3/4-inch (19 mm) copper coated steel rod within the 6-inch hole.
Pack down the hole with wet rock-salt. For additional information consult the National
Electric Code, Article 250, Section H
Grounding Electrode System, or other appropriate
code.
POWER REQUIREMENTS
WARNING
Electrical installation must be performed by qualified personnel only.
All switches, slow-blow fuses and power cables are customer supplied and
must be chosen as directed by applicable national and/or local electrical
codes.
Use a separate primary line disconnect switch for each HT4001 power supply and
slave.
Note:
Input voltage must not drop below 15% of the values listed below. The
power supply will go into an idle mode and display an error on the control board
if the input voltage is too low. See also
Error Codes in Section 7.
Size the disconnect box(es) to the following requirements for the HT4001 power supply:
Rated Input
Input
Current @
Recommended
Voltage
Phase
89 kVA Output
Slow-Blow Fuse Size
200 VAC
3
257 amps
350 amps
220 VAC
3
234 amps
300 amps
240 VAC
3
214 amps
300 amps
380 VAC
3
135 amps
175 amps
400 VAC
3
128 amps
175 amps
415 VAC
3
124 amps
175 amps
440 VAC
3
117 amps
175 amps
480 VAC
3
107 amps
150 amps
575 VAC
3
89 amps
125 amps
600 VAC
3
86 amps
125 amps
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