Table of Contents
Advertisement
PAGE
WARNING:
3-19
WARNING:
3-19
WARNING:
3-20
WARNING:
3-28
WARNING:
4-8
WARNING:
4-14
BOP 1KW OPR 8/7/09
LIST OF
WARNINGS AND CAUTIONS
WARNING/CAUTION
For inductive loads, and especially superconducting magnet type loads,
the inherent offset of the BOP in the OFF state may generate significant
current in the circuit. A properly rated switch in parallel with a resistor
must be connected between the power supply and the load. The switch
must be open and the BOP front panel LCD must read 0V, 0A before re-
moving or installing connections between BOP and load.
For both inductive loads and constant-current-type active electronic
loads when the BOP output is set to OFF, a path is provided for absorbing
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. How-
ever, In addition to the built-in safety features, constant-current-type ac-
tive 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.
Accessing the BOP after the output is disabled in BATTERY mode is haz-
ardous because (1) high current arcing is possible and (2) either the ex-
ternal battery voltage, or the voltage (±Voltage Protection max) on the
BOP output terminals may be dangerous. Therefore, for battery and con-
stant-voltage-type active electronic loads it is recommended that two
properly rated external switches be installed for safety: one in series with
the battery, and one across the BOP output. After the unit is set to OFF,
first open the switch is series with the battery, then close the switch
across the BOP output to ensure safety before handling BOP connec-
tions. When connecting the battery, the switch across the output should
be opened after the connections are complete and then the switch in se-
ries with the battery should be closed. If the constant-voltage-type active
electronic load is adjusted to zero before handling the power supply-to-
load connections, only the switch across the BOP output is required.
Be sure that output power is OFF (Standby indicator lit) while connecting
monitoring device. Be sure that connections are secure and that termi-
nals are not inadvertently shorted.
The sense resistor will be dissipating full rated current of the BOP. If it is
hot to the touch, the sense resistor value, power rating and/or cooling are
incorrect; refer to PAR. 4.3 and Table 4-2.
The sense resistor will be dissipating full rated current of the BOP. If it is
hot to the touch, the sense resistor value, power rating and/or cooling are
incorrect; refer to PAR. 4.4 and Table 4-2.
E
Advertisement
Table of Contents
