2-8 BOP HIPWR 1113152.4 INSTALLATION2.4.1 RACK MOUNTINGThe unit is shipped with four feet attached to bottom of the unit which must be removed prior toinstallation (see Figure 1-2). The BOP is designed to be rack mounted in a standard 19-inchwide rack using the mounting ears (supplied) attached to the front panel (see Figure 1-2). Allowa minimum of 7/8 in. (22.2 mm) above and below the unit to permit air intake necessary forproper cooling of the unit. CAUTION: The rack must provide support at the rear (within 6inches of the rear panel). Optional slides can also be used (see PAR. 2.4.2).2.4.2 SLIDE INSTALLATIONOptional slides are available for rack mounting (see Table 1-4 and Figure 1-2).2.5 WIRING INSTRUCTIONSInterconnections between an a-c power source and a power supply, and between the powersupply and its load are as critical as the interface between other types of electronic equipment.If optimum performance is expected, certain rules for the interconnection of source, power sup-ply and load must be observed by the user. These rules are described in detail in the followingparagraphs.CAUTION: When working with active loads, the voltage or current of the active loadmust not exceed the maximum voltage or current rating of the BOP. Other-wise the overvoltage or overcurrent protection will shut down the power sup-ply.2.5.1 SAFETY GROUNDINGLocal, national and international safety rules dictate the grounding of the metal cover and caseof any instrument connected to the a-c power source, when such grounding is an intrinsic part ofthe safety aspect of the instrument. The ground terminal of the source power connector (Figure2-1) is connected to the chassis and the instructions below suggest wiring methods which com-ply with these safety requirements; however, in the event that the specific installation for thepower system is different from the recommended wiring, it is the customer's responsibility toensure that all applicable electric codes for safety grounding requirements are met. As a pre-caution, always connect the stud marked at the rear panel to proper earth ground.2.5.2 SOURCE POWER CONNECTIONSSource power is connected to the power supply via three-wire input power using the sourcepower mating connector supplied (see Table 1-3). See Table 1-2 for source power specifica-tions. This power supply operates from single phase a-c mains power (or between two phasesof 3-phase a-c mains power) over the specified voltage and frequency ranges (Table 1-2) with-out any need for range selection. The user must provide aproperly sized and rated mains lead(line cord) and service with a current rating compatible with the anticipated input current. Linecords available as accessories are listed in Table 1-4. Kepco recommends #12 AWG (2,0 mmdiameter) for input line cord.2.5.3 D-C OUTPUT GROUNDINGConnections between the power supply and the load and sensing connections may, despite allprecautions such as shielding, twisting of wire pairs, etc., be influenced by radiated noise, or“noise pick-up”. To minimize the effects of this radiated noise the user should consider ground-ing one side of the power supply/load circuit. The success of d-c grounding requires careful
