KEPCO BHK-MG 40W (Half Rack) Series - Manual (Page 77)

BHK-1/2-MG 121313
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3.8.1 ANALOG PROGRAMMING WARNINGS AND CAUTIONS
THE POWER SUPPLY PRODUCES DANGEROUS VOLTAGES WHICH CAN BE LETHAL.
ALWAYS OBSERVE THE FOLLOWING PRECAUTIONS.
a. Always connect the chassis of the power supply to a good AC ground (earth) con-
nected to OUTPUT TERMINALS terminal strip TB1, terminal 4.
NOTE: All connections must be tight, whether at the terminal strips of the power supply or at
external equipment.
b. Use high voltage rated cables (at least 3kV) for all connections, even for programming
connections. Where required use twisted pair cable or shielded single or pair cable
(shield to chassis), rated for high voltage.
c. Even though the BHK-MG 40W Power Supply will discharge the output capacitor at
turn-off, verify that the output is safe before making any attempt to connect or discon-
nect the load.
d. Verify that the input circuit breaker is off and remove the line cord before connecting or
disconnecting the load or other external components to analog programming terminals.
e. If possible, connect one side of the output to ground (either side may be grounded).
The power supply can also operate with the output “floating” with respect to ground.
The following warnings and cautions apply to the output terminals:
• If the external equipment (e.g., Digital Voltmeter) has floating inputs and the power sup-
ply is operating with +OUT terminal connected to ground, connect the LOW input of the
external equipment to +OUT terminal of the power supply.
• If the external equipment (e.g., Digital Voltmeter) has floating inputs and the power sup-
ply is working with –OUT terminal connected to ground, connect the LOW input of the
external equipment to –OUT terminal of the power supply.
• If the power supply outputs should stay isolated from ground, any external equipment
connected to the output terminal should be connected to a-c source power using an iso-
lating transformer, or should have floating inputs.
NOTE: Any isolating transformer used for connecting test equipment to a-c source power
should have the isolation rated to a value higher than the maximum output volt-
age of the power supply.
WARNING
WARNING