BOP HIPWR 091719
3-23
For inductive loads, and especially superconducting magnet type
loads, the inherent offset of the BOP in the OFF state may generate sig-
nificant current in the circuit. Two properly rated external switches
must be installed for safety: one in series between the power supply
and the magnet, and the other in parallel with the magnet. Once the
BOP front panel display reads 0V, 0A, close the parallel switch, then
open the series switch before removing or installing connections
between BOP and load. To restore normal operation, first close the
series switch, then open the parallel switch.
ACTIVE.
Active mode (default setting) is necessary for the power supply to function properly
and safely with inductive loads and constant-current-type active electronic loads. Active mode
can also be used with resistive loads. Table 3-6 indicates how the power supply responds to a
command to go from Output ON to OFF. When the output is disabled, the unit is set to voltage
mode, voltage is set to zero and both current protect and voltage limit are set to maximum.
When the unit is enabled, the pre-existing settings for voltage, current protect and voltage limit
are restored.
For both inductive loads and constant-current-type active electronic
loads when the BOP output is set to OFF, a path is provided for absorb-
ing either the energy accumulated in the reactance of the load during
the ON state, or energy delivered by an electronic load. This prevents
damage to the load and power supply as well as providing safety for
the user. However, In addition to the built-in safety features, constant-
current-type active electronic loads must be adjusted to zero and the
BOP front panel LCD must read 0V, minimum current, before handling
the power supply-to-load connections.
TABLE 3-6. POWER SUPPLY BEHAVIOR WHEN OUTPUT IS SET TO OFF
LOAD TYPE
SETTING
If unit was in Voltage Mode when output OFF
command issued.
If unit was in Current Mode when output OFF
command issued.
ACTIVE
• Unit remains in voltage mode.
• Voltage set to zero.
• Both ± Current Protect set to maximum.
• Both ± Voltage Limit remain at maximum.
• Unit set to voltage mode.
• Voltage set to zero.
• Both ± Current Protect remain at maximum.
• Both ± Voltage Limit set to maximum.
RESISTIVE
• Unit remains in voltage mode.
• Voltage set to zero.
• Both ± Current Protect set to minimum box values.
• Both ± Voltage Limit. remain at maximum.
• Unit remains in current mode.
• Current set to zero.
• Both ± Voltage Protect set to minimum box values.
• Both ± Current Limit remain at maximum.
BATTERY
• Unit set to current mode.
• Current set to zero.
• Both ± Voltage Protect. remain at maximum.
• Both ± Current Limit set to maximum.
• Unit remains in current mode,
• Current set to zero.
• Both ± Voltage Protect set to maximum.
• Both ± Current Limit remain at maximum.
WARNING
WARNING
Содержание BOP-ME 1KW
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