3-4
PAC500
Instruction Manual
4
INSTALLATION
6. Connect the control cable. Use 16/4 SJ cord (supplied with Power Supply Leads Package, Part No. 028009).
This cable connects the power supply and the console through Amphenol receptacle 2 RECP. 2PL-A and 2PL-B
provide control power, 120 VAC to the auxiliary relay which in turn actuates the contactor. 2PL-C is the (+)
ground connection required for pilot arc starting and operation of the voltage sensing circuit. Refer to the power
supply instruction manual for proper wiring instructions.
Note:
Do not connect 2PL-A and 2PL-B directly to the power supply contactor coil. Excessive inrush current
can damage 1FLS and 2FLS in the console. An auxiliary control relay is required and provided in
Hypertherm power supplies.
Note:
Do not omit the 2PL-C connection as improper grounding of the pilot arc circuit will result causing
starting difficulties and possible damage to the control. In Hypertherm power supplies there is a specific
terminal for this connection as noted in the power supply instruction manual. In other power supplies the
connection should be made directly to the positive (+) terminal if no other appropriate terminal is
available.
7. Parallel Power Supply Connections. If more than one power supply is to be used in parallel the following
steps must be completed.
1. Connect the positive (+) terminal of each power supply to earth ground.
2. Connect each power supply to a suitably fused disconnect box.
3. Connect the power supply outputs in parallel; positive (+) to positive (+) and negative (-) to negative (-).
4. Connect the auxiliary contactor control relay coils in parallel. This may be done on H400 and H600 power
supplies by means of the eight foot contactor paralleling cable, Part No. 023011. H401 and H601 power
supplies do not use a stock cable. Connections must be made to terminal strips as specified in the power
supply instruction manual.
Water Supply System
1. Connect the pump inlet to a water supply using a length of flexible hose. Use 1/2" I.D. hose.
2. One Torch System: connect a suitable length of 3/8" I.D. hose from the outlet of the pump to the control
console fitting marked WATER IN PUMP (figure 2, page 5-13).
Two Torch System: connect a suitable length of 1/2" I.D. hose from the outlet of the pump to the manifold. Two
lengths of 3/8" I.D. hose are supplied to connect the manifold with each control console.
3. Connect the WATER OUT fitting to drain using the hose sizes specified in Step 2.
4. Connect a two-wire control cable for the pump to the contactor mounted on the pump motor. The control cable
should be wired to the power supply control circuit, 120 VAC, so that the water pump is actuated when the
power supply is turned on. Hard conduit or Sealtite is recommended for this interconnection.
5. Connect the contactor to a disconnect switch using suitable watertight flexible conduit. Check motor rotation.
Caution:
Be sure the right voltage taps are used on the motor;
the motor is connected for 460V, 3 phase.
Содержание PAC500
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Страница 61: ...5 20 PAC500 Instruction Manual 4 MAINTENANCE Figure 10 Operator s Panel Electrical Schematic 2 Torch ...
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