Installation; Wiring Instructions; Safety Grounding; Source Power Connections - KEPCO HSM 3.3-230 Operator's Manual

7. Disconnect sense lines with power supply still operating, either by removing the mating I/O
connector or by manually opening the sense line connected to Pin 37; verify that the power
supply output turns off (NOTE: At no load the output voltage will drop slowly.)
8. Remove source power for 30 seconds or until fan stops turning; Reconnect the sense lines,
reapply source power; verify that the output voltage returns to the value measured in step 5
above,
9. Remove source power connection.
2.6 INSTALLATION (Refer to Figure 1-3, Outline Drawing)
The HSM power supply is designed to be operated in fixed installation applications. Attach the
HSM power supply to the mounting surface using the four holes in the bottom of the chassis sur-
rounded by plastic grommets.
For all installations, provide adequate clearance around air inlet and exhaust locations and
ensure that the temperature immediately surrounding the unit and especially near the air inlets
does not exceed the maximum specified ambient temperature for the operating conditions.
2.7

WIRING INSTRUCTIONS

Interconnections between an a-c power source and a stabilized power supply, and between the
power supply and its load are as critical as the interface between other types of electronic equip-
ment. If optimum performance is expected, certain rules for the interconnection of source,
power supply and load must be observed by the user. These rules are described in detail in the
following paragraphs.
2.7.1

SAFETY GROUNDING

Local, national and international safety rules dictate the grounding of the metal cover and case
of any instrument connected to the a-c power source, when such grounding is an intrinsic part of
the safety aspect of the instrument. The instructions below suggest wiring methods which com-
ply with these safety requirements; however, in the event that the specific installation for the
power system is different from the recommended wiring, it is the customer's responsibility to
ensure that all applicable electric codes for safety grounding requirements are met.
2.7.2

SOURCE POWER CONNECTIONS

The rear panel of the HSM power supply is equipped with an IEC 320 style recessed power inlet
connector which provides interface to a 3-wire safety line cord via a polarized mating plug.
Kepco offers as accessories (see Table 1-3) both a user-wired mating connector and a prewired
linecord set, the latter configured for North American applications. Terminal assignment follows
internationally accepted conventions (see Figure 2-3). It is the user's responsibility to ensure
that all applicable local codes for source power wiring are met.
2-4
HSMSERIES OPR 052912