Operator Manual Firmware Ver.3.05 and higher Instruction Manual

LIST OF
WARNINGS AND CAUTIONS
BOP 1KW OPR 2/28/14 E
PAGE WARNING/CAUTION
3-8 WARNING: 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 voltage and current measurements at the output must
read 0V, 0A before removing or installing connections between BOP and
load.
3-9
WARNING: 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 voltage and current
measurements at the output must read 0V, minimum current, before han-
dling the power supply-to-load connections.
3-9
WARNING: 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 in 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.
4-8
WARNING: 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.
2-8 CAUTION: it is recommended that source power of external equipment connected to
the Analog Port be applied through an isolating transformer to avoid
ground loops or possible damage to the BOP due to incorrect equipment
a-c wiring (e.g., defeating of ground connection).
2-10 CAUTION: DO NOT repeatedly toggle the POWER circuit breaker/switch as this may
damage the unit.
2-11 CAUTION: DO NOT repeatedly toggle the POWER circuit breaker/switch as this may
damage the unit.
2-11 CAUTION: The rack must provide support at the rear (within 6 inches of the rear pan-
el). Optional slides can also be used (see PAR. 2.4.2).
2-12 CAUTION: When working with active loads, the voltage or current of the active load
must not exceed the maximum voltage or current rating of the BOP. Oth-
erwise the overvoltage or overcurrent protection will shut down the pow-
er supply.
2-14 CAUTION: Never connect the load to the sense terminals. Monitoring instruments
(e.g., DVM, etc.) are the only external equipment that may be safely con-
nected to the sense terminals.
2-14 CAUTION: Never connect the BOP OUTPUT terminal (or the load terminal tied to the
OUTPUT terminal) to earth-ground. Otherwise, if the controlling device is
grounded, the BOP can be damaged by the protection limit output current
flowing inside the BOP along the programming signal return path.