HK-A SERIES
HK-A
A-94
・All specifications are subject to change without notice.
4.
Insulation Resistance And Withstand Voltage Test
1 Insulation Resistance Test
Please use a DC megger (Max.500V) for measuring the
insulation resistance between output terminals and chas-
sis. The resistant figure of HK-A series is 100M ohm at
500VDC.
Withstandvoltagetester
+
−
FG
H
N
+
−
FG
H
N
Output
Input
Output
Input
Output
Input
+
−
FG
H
N
IsolationTester
500VAC1minute(100mA)
500VDCover100Mohm
Pleaseconnectoutputasshownabove.
INPUT-FG
OUTPUT-CHASSIS
INPUT-CHASSIS
2.0kVAC1minute
(20mA)
2.0kVAC1minute
(20mA)
PleaseconnectOUTPUTasshownabove.
PleaseconnectOUTPUTasshownabove.
A high voltage pulse may be generated when you change
the charging DC value suddenly, therefore, please change
the value gradually.
After the test, please discharge a power supply by short-
circuiting all output terminals with chassis ground.
2 Withstand Voltage Test
This Series is designed to withstand 2.0kVAC, 1 minute
between input and output terminals.
Please set the LIMIT value of a withstand voltage tester
at 20mA. The withstand voltage between output terminals
and chassis is 500VAC, 1 minute (LIMIT current: 100mA).
2
Overload Protection (OCP)
The HK-A series are provided with built-in constant over
current protective circuit with automatic recovery. Hence,
the power supply will automatically recover when the over-
load condition is cleared. It is not externally adjustable.
The short circuit and/or over current conditions continue
over 30 seconds, the power supply may be damaged.
3
Over Voltage Protection (OVP)
HK-A series is provided with a built in over voltage protec-
tion circuit. Once this over voltage protection circuit shuts
down, the output can only be recovered by turning o the
input line and reinput the power after the interval time.
(HK10A, HK15A: Zener diode clamp method. When output
voltage rises 115% < of nominal output voltage, OVP will
operate and shut down the output. If this happens, zener
diode must be changed.)
4 Remote Sensing
This function is built only HK100A and HK150A models
in. In the case of the line drop (voltage drop) caused by
the resistance of wires between output terminals of power
supply and the terminals of a load.
If remote sensing is not required, please connect +S termi-
nal with +terminal, and also connect -S terminal with -ter-
minal.
Remote sensing can compensate the line drop within the
range of 10% of rated output voltage. Please use a shield-
ed cable or twisted-pair cable for remote sensing.
5 Output Ripple Voltage
The output ripple voltage is measured at the power supply
output terminals, irrespective of whether a load is con-
nected or not. If the load cable is long, connect a capaci-
tor (electrolytic, lm, etc.) of sucient capacity to the load
terminals to reduce the impedance. It should be noted that,
if the ground lead of the oscilloscope’s probe is too long
during measurement, the ripple voltage cannot be mea-
sured accurately.
6 In-rush Current
HK-A series is provided built-in in-rush current limiting
circuit. Please select an input switch, fuse etc. carefully,
when you use multiple power supplies in your system joint-
ly.
IN-RUSHCURRENTWAVECURVES
(Input:100VAC,PhaseAngle:90°,FullLoad,AmbientTemperature:25℃)
HK10A HK15A
HK25A HK50A
HK100A HK150A
10A/Div10ms/Div 10A/Div20ms/Div
10A/Div20ms/Div 10A/Div20ms/Div
10A/Div20ms/Div 10A/Div20ms/Div
IN-RUSHCURRENTWAVECURVES
(Input:100VAC,PhaseAngle:90°,FullLoad,AmbientTemperature:25℃)
HK10A HK15A
HK25A HK50A
HK100A HK150A
10A/Div10ms/Div 10A/Div20ms/Div
10A/Div20ms/Div 10A/Div20ms/Div
10A/Div20ms/Div 10A/Div20ms/Div
IN-RUSHCURRENTWAVECURVES
(Input:100VAC,PhaseAngle:90°,FullLoad,AmbientTemperature:25℃)
HK10A HK15A
HK25A HK50A
HK100A HK150A
10A/Div10ms/Div 10A/Div20ms/Div
10A/Div20ms/Div 10A/Div20ms/Div
10A/Div20ms/Div 10A/Div20ms/Div