2
228-1227 REV 2
022101
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]
BROWNOUT VOLTAGE:
115V a-c input selection, 80V a-c min. (85V a-c min. for model RAX 28-6.2K)
230V a-c input selection, 160V a-c min. (170V a-c min. for model RAX 28-6.2K)
320V d-c input selection, 220V d-c min. (Jumper in 230V a-c position)
INPUT CURRENT:
(maximum load at 50°C with nominal output voltage):
INPUT PROTECTION AND SOFT START:
A triac soft start circuit reduces start-up surge. Units are protected against
shorts by an input fuse. Fuse value 6.3A.
INPUT SURGE:
At 25°C from cold start:
NOTE: There are two input surges at turn-on:
EFFICIENCY:
75% typical (79% typical for model RAX 3.3-35K)
STABILIZATION:
TRANSIENT RECOVERY:
A step load change from 50% to 100% of rated load current in 50 microseconds or more, pro-
duces no more than 4% output voltage excursion. Recovery to 1% of the original voltage is less than 1 millisecond.
OUTPUT HOLDING TIME:
Output is maintained for 20 milliseconds minimum upon input interruption (30 milliseconds typi-
cal) with nominal input voltage and output load at 50°C current rating.
OVERVOLTAGE PROTECTION:
Fixed, factory set. See Table 1. The overvoltage circuit is reset by interrupting input for
approximately 15 seconds.
OPERATING TEMPERATURE:
0 -71°C. See the derating graph, Figure 1.
STORAGE TEMPERATURE:
-20°C to + 75°C.
HUMIDITY:
20% to 95% relative humidity, noncondensing
ISOLATION:
(at 25°C ambient, 65% relative humidity):
Between input and output terminals, 3.75 KV a-c for 1 minute (with Y-capacitors removed).
Between input and output or chassis, 2000V a-c for 1 minute.
Between output terminals and chassis, 500V a-c for 1 minute.
INSULATION RESISTANCE:
Between output and chassis, 100 megohms minimum (500V d-c)
LEAKAGE CURRENT:
0.5mA max at 120V a-c (U.L. Method)
0.75mA max at 240V d-c (U.L./VDE Method)
VIBRATION:
Three Axes:
5-10 Hz., 10 mm amplitude
10-55 Hz., 2g
SHOCK:
Three axes, 20g, 11 ms ±5msec pulse duration
INPUT SOURCE
NOMINAL INPUT VOLTAGE
MINIMUM INPUT VOLTAGE
120 V a-c input selection
3.4A typ. - 4.2A max.
3.8A typ. - 4.4A max.
220-240V a-c input selec-
tion
1.7A typ. - 2.2A max.
2.1A typ. - 2.3A max.
d-c input selection
1.2A max. (320V input)
1.5A max. (220V input)
INPUT SOURCE
FIRST SURGE (5ms max.)
SECOND SURGE (3ms max.)
120 V a-c input selection
17A max.
20A typ.
220-240V a-c input selec-
tion
34A max.
15A typ.
320V d-c input selection
34A max.
34A typ.
CHARACTERISTIC
TYPICAL
MAXIMUM
Source Effect (min - max)
0.8%
1.5%
Load Effect, measured at sensing terminals (10% - 100% load change)
0.8%
1.5%
Temperature effect (0 to 71°C)
1.0%
2.0%
Combined effect (envelope)
2.0%
4.0%
Drift (8 hr. at 25°C)
0.1%
0.5%
