BHK-1/2-MG (OPR) 030916
1-11
The same 40 memory locations are also available to save the active programmed settings (volt-
age, current, overvoltage, overcurrent). The saved setting can be recalled by specifying the
memory location. Refer to PAR’s. 3.2.12 and 3.2.13 for more information.
1.4.7
CURRENT MEASUREMENT SCALE
Measurement of a decreasing output current of the power supply that falls below 8.98% ±0.1%
of the rated value is automatically measured with increased resolution/accuracy by a factor of
10 until the current rises above 9.69% ±0.1% of rated value.
1.4.8
FAST MODE/SLOW MODE SELECTION
BHK-MG Series Power Supplies can be configured by external strapping for either slow mode
operation with the internal output capacitor connected to the output, or fast mode operation with
the internal output capacitor disconnected from the output. The slow mode (default state) is rec-
ommended for voltage stabilization because of its low output noise and low recovery amplitude
to a dynamically changing load. The fast mode offers a faster response to step or dynamic pro-
gramming of the output voltage (in voltage mode), when the power supply is used as a power
amplifier. Fast mode is also recommended for current stabilization because of its fast response
to a dynamically changing load. Refer to PAR. 3.9.1 for more information.
1.4.9
BUILT-IN PROTECTION
BHK-MG Series Power Supplies provide built-in protection against the following:
a.
Overtemperature of the pass elemen
t. Heatsink temperature is monitored. If an overtem-
perature condition is maintained for more than 2.5ms, the following actions are initiated: the
pass element is cut off, the output capacitor is discharged, and the unit is turned off by trip-
ping the circuit breaker. A flag is sent to the host computer via a dedicated line of the Status
and Remote On/Off port.
b.
Overvoltage/overcurrent at the output.
See PAR. 1.4.4
c.
Uneven voltage in the pass and sink elements.
Voltage is monitored across different tran-
sistors of the pass and sink elements. If uneven voltage continues for more than 20ms, the
pass element is cut off, the output capacitor is discharged, the POWER circuit breaker is
tripped to OFF and a flag is sent to the host computer on a dedicated line (Status and
Remote On/Off Port connector)
d.
Input Voltage Selector set incorrectly.
If the selector is set to 115V a-c and the input volt-
age is 230V a-c, the input circuit breaker will be tripped without delay. A flag is sent to the
host computer on a dedicated line (Status and Remote On/Off Port).
e.
AC line failure.
If AC line is missing for more than 50 ms, a flag is sent to the host computer
on a dedicated line (Status Port connector). In addition, if the jumper at A3-JP2 is installed
(default state), the pass element is cut off, the output capacitor is discharged, and the
POWER circuit breaker is tripped to OFF.
f.
Interruption between the sensing and corresponding power output terminals.
If there
is an interruption between the sensing and power terminals, two diodes connected in parallel
between the sensing lead and the corresponding power lead (one forward biased and one
reverse biased), allow the power supply to continue to function.
Содержание BHK-MG Series
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Страница 18: ...xii BHK MG030916 FIGURE 1 1 BHK MG 40W SERIES PROGRAMMABLE POWER SUPPLY...
Страница 24: ...1 6 BHK 1 2 MG OPR 030916 FIGURE 1 2 BHK 40W SERIES POWER SUPPLY MECHANICAL OUTLINE DRAWING SHEET 1 OF 2...
Страница 25: ...BHK 1 2 MG OPR 030916 1 7 FIGURE 1 2 BHK 40W SERIES POWER SUPPLY MECHANICAL OUTLINE DRAWING SHEET 2 OF 2...
Страница 26: ...1 8 BHK 1 2 MG OPR 030916 FIGURE 1 3 RA 24 RACK ADAPTER WITH TWO 1 2 RACK BHK MG 40W UNITS...
Страница 35: ...BHK 1 2 MG SERIES 030916 2 3 FIGURE 2 2 BHK MG SERIES REAR PANEL CONTROLS AND CONNECTIONS...
Страница 100: ...3 54 BHK 1 2 MG 030916 FIGURE 3 20 SERIES AUTOMATIC CONFIGURATION...
Страница 108: ...3 62 BHK 1 2 MG 030916 FIGURE 3 23 PARALLEL AUTOMATIC CONFIGURATION Eo is the output voltage of the power assembly...
Страница 113: ...BHK 1 2 MG 030916 3 67 FIGURE 3 25 PARALLEL MASTER SLAVE CURRENT MODE CONFIGURATION...
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