KEPCO, INC.
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131-38 SANFORD AVENUE
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FLUSHING, NY. 11352 U.S.A.
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TEL (718) 461-7000
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FAX (718) 767-1102
http://www.kepcopower.com
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email: [email protected]
2
228-1453 REV 3
082306
ALARM CIRCUIT.
The HSF-1U includes an isolated internal relay offering normally closed and normally open contacts ref-
erenced to an isolated common. These contacts may be used to configure “close on failure” or “open on failure” alarm cir-
cuits. (Refer to the RA 19-1U Manual for alarm configurations for multiple HSF-1U power supplies.)
KEYING.
Keying of the HSF-1U is established at the factory (see Figure 2). The output voltage determines which key pins
are installed. When the proper holes in the rack adapter are blocked by keying screws installed by the user, only a power
supply of the correct voltage can be inserted in the rack adapter slot. (Refer to the RA 19-1U Manual for rack adapter keying
instructions.)
FIGURE 1. HSF-1U 50 WATT POWER SUPPLIES (4) INSTALLED IN RA 19-1U RACK ADAPTER
III — SPECIFICATIONS
The following specifications apply to HSF-1U 50 Watt Series models (also refer to Table 1). Other models are also available;
consult your Kepco representative for their specifications.
INPUT:
Voltage: 120V a-c/240V a-c nominal; Range 95-264V a-c; 125-370V d-c. (polarity insensitive; consult factory)
Frequency: Nominal 50-60 Hz; Range 47-440Hz (at 440Hz leakage current exceeds UL/VDE safety spec.limit).
Current (nominal output at rated load): @120V a-c rms: 1.0A a-c typ., 1.2A a-c max;
@240V a-c rms: 0.5A a-c typ., 0.7A a-c max.
Initial Turn-on Surge: (one-half of first input cycle): @120V a-c rms, 45A max., @240V a-c rms, 90A max.
Brownout Voltage: 85V a-c, 110V d-c
Switching Frequency: 120KHz typical, nominal load
STABILIZATION:
Source Effect: Range 95-132V a-c or 190-264V a-c, 1.0% typ.; 2.0% max.
Load Effect: Range 10%-100% load, 1.0% typ.; 2.0% max.
Temperature Effect: Range 0
o
to 40
o
C, 1.0% typ.; 2.0% max.
Combined Effect: 2.0% typ.; 4.0% max. (includes source, load, and temperature effects).
Time Effect: 0.1% typ.; 0.5% max. (1/2 hr-8 hr at 25
o
C).
RECOVERY CHARACTERISTICS:
A step load change from 50% to 100% produces less than +4% output excursion.
Recovery occurs to 1% of the original setting in <2 ms (load change t
r
or t
f
equal to or greater than 50
µ
sec).
START-UP TIME:
500 ms. maximum.
HOLDUP TIME:
20 ms. typ. (120V a-c), 15 ms. min (100V a-c).
DIELECTRIC STRENGTH:
Between input and output: 2KV a-c for one minute.
Between input and output with Y-capacitor removed: 3.75KV a-c for one minute.
Between input and case (ground): 2KV a-c for one minute.
INSULATION RESISTANCE:
Between input and ground, output and ground, input and output;
100 Megohms min. (500V d-c).
LEAKAGE CURRENT
(UL method, 120V a-c): 0.5 mA maximum.
(VDE method, 240V a-c): 0.75 mA maximum.
SAFETY:
Designed to meet UL 1950; CSA 22.2 No. 234 (M90) Level 3, EN 60950 Units are CE marked per the Low Volt-
age Directive (LVD), 73/23/EEC and 93/68/EEC. [The standards do not apply with DC input operation]
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