HP A Series User Manual

schematics provided to illustrate all 33 models. Each
schematic, of course, identifies the supplies for which
it applies and includes notes and tables to identify the
difference {mainly in component values) among the
supplies illustrated in the common schematic.
1-8 SPECIFICATIONS
1-9 Detailed specifications for the power supplies
are given in Table 1-1.
Table T1. Specifications
INPUT:
115Vac ±10%, single phase, 48-63 Hz. See Options
101, 102, and 103.
OUTPUT:
See Paragraph 1-5.
LOAD REGULATION;
Less than 0.01 % or 1 mV whichever is greater for a
full load to no load change in output current.
LINE REGULATION:
Less than 0.01 % or 1 mV whichever is greater for a
10% change in the specified input voltage.
RIPPLE AND NOISE:
Less than 1 mV rms and 2 mV p-p (up to 20 MHz).
TEMPERATURE RANGES;
Operating: 0 to 50“C ambient. Output current de¬
rated linearly for temperatures greater
than 50° with 50% of maximum output
current at 71°C ambient.
Storage: ~55°C to +85“C
Cooling: Convection cooled.
TEMPERATURE COEFFICIENT:
Less than 0.01% output voltage change per degree
Centigrade over the operating range from 0 to 50 C
after 30 minutes warmup.
THERMAL PROTECTION:
Heat sink mounted thermostat opens ac line if
supply overheats due to high ambient temperature.
Thermostat automatically closes (reset) when temper¬
ature cools to safe operating level.
STABILITY:
Less than 0.1% total drift for 8 hours after an initial
warm-up time of 30 minutes at constant ambient, con¬
stant line voltage, and constant load.
TRANSIENT RECOVERY TIME:
Less than 50 jusec for output recovery to within
15 mV of nominal output voltage following a load
change from full to half load (or vice versa)._
OVERLOAD PROTECTION:
A current limit circuit cuts back current linearly to
approximately 10% of rated output current when supply
is short-circuited. Automatically resets when overload
removed. Current limit activation point adjustable
(screwdriver control) but preset at factory to activate
at 104 ±1% of maximum rated output current at
nominal output voltage.
OUTPUT CONTROL:
Screwdriver adjustment accessible through hole in
front panel. Minimum adjustment range is ±0.5 V or
±5%, whichever is greater.
ERROR SENSING:
Error sensing normally accomplished locally at rear
terminals. Provision included at rear terminal strip for
remote sensing with correction for load lead voltage
drops of up to 0.5 V total. Load protected if sensing
terminals inadvertently opened.
MOUNTING:
Three mounting surfaces provided for mounting in
the upright position. For mounting orientations other
than upright, adequate cooling is required. See
Section II.
DIMENSIONS;
A— suffix models: 1.91" W x 5.03" H x 12.25 D '
(48 mm W x 128mm H x
311mm D)
C- Si E ™ suffix models; 3.94" W x 5.03" H
12.25" D
(100 mm W X 128mm H x
311mm D)
WEIGHT (net/shipping):
A— suffix Models: 6 lbs (2, 7 kg)/8 lbs (3, 6 kg)
C- suffix Models: 10 lbs (4, 5 kg)/12 lbs (5, 4 kg)
E- suffix Models: ii lbs (5,9 kg)/16 lbs (7, 3 kg)

HP A Series Specifications

General

Brand	HP
Model	A Series
Category	Power Supply
Language	English