Monitoring Relays
1-Phase AC/DC Over Voltage - AC Over Current
Types DUA01, PUA01
• AC/DC over voltage monitoring relay
• Selection of measuring range by DIP-switches
• Measuring ranges: 2 to 20 VAC/DC, 5 to 50 VAC/DC,
20 to 200 VAC/DC, 50 to 500 VAC/DC, 0.4 to 4 V
p
AC
• Adjustable voltage limit on relative scale
• Adjustable hysteresis
• Programmable latching at set level
• Output: 8 A SPDT relay normally de-energized
• For mounting on DIN-rail in accordance with DIN/EN
50 022 (DUA01) or plug-in module (PUA01)
• 22.5 mm Euronorm housing (DUA01) or
36 mm plug-in module (PUA01)
• LED indication for relay and power supply ON
• Galvanically separated power supply
DUA01
PUA01
Product Description
DUA01 and PUA01 are pre-
cise AC/DC over voltage
monitoring relays. They can
also be used as 1-phase or 3-
phase over current monitoring
relays when connected with
MI or MP current transformers.
Owing to the built-in latch
function, the ON-position of
the relay output can be main-
tained.
The red LED indicates the
alarm status.
Ordering Key
Housing
Function
Type
Item number
Output
Power supply
Range
DUA 01 C B23 500V
Type Selection
Mounting
DIN-rail
Plug-in
Output
SPDT
SPDT
Supply: 24 VDC
DUA 01 C 724 500V
PUA 01 C 724 500V
Supply: 48 VDC
DUA 01 C 748 500V
PUA 01 C 748 500V
Supply: 24/48 VAC
DUA 01 C B48 500V
PUA 01 C B48 500V
Supply: 115/230 VAC
DUA 01 C B23 500V
PUA 01 C B23 500V
Input Specifications
Input
(voltage level)
DUA01
PUA01
Measuring ranges
Direct
Selectable by DIP-switches
2 to 20 VAC/DC
5 to 50 VAC/DC
20 to 200 VAC/DC
50 to 500 VAC/DC
0.4 to 4 V
p
AC
Max. voltage for 1 s
MI and MP CT ranges
1-ph.:
3-ph.:
MI 5
MP 3005
MI 20
MP 3020
MI 100
MP 3100
MI 500
MP 3500
Note:
The input voltage cannot
raise over 300 VAC/DC with
respect to ground (PUA01 only)
Contact input
DUA01
PUA01
Disabled
Enabled
Latch disable
Terminals Y1, Y2
Terminals 5, 7
Int. resist.
> 500 kΩ
> 500 kΩ
> 500 kΩ
> 500 kΩ
> 500 kΩ
AAC rms
0.5 to 5 A
2 to 20 A
10 to 100 A
50 to 500 A
Max. volt.
600 V
600 V
600 V
600 V
600 V
1000 V
Max. curr.
20 AAC
50 AAC
250 AAC
750 AAC
Output Specifications
Output
Rated insulation voltage
Contact ratings
(AgSnO
2
)
Resistive loads
AC 1
DC 12
Small inductive loads AC 15
DC 13
Mechanical life
Electrical life
SPDT relay
250 VAC
µ
8 A @ 250 VAC
5 A @ 24 VDC
2.5 A @ 250 VAC
2.5 A @ 24 VDC
≥
30 x 10
6
operations
≥
10
5
operations
(at 8 A, 250 V, cos
ϕ
= 1)
≤
7200 operations/h
Operating frequency
Dielectric strength
Dielectric voltage
≥
2 kVAC (rms)
Rated impulse withstand volt. 4 kV (1.2/50 µs)
Terminals Z1, Y1
Terminals 8, 9
> 10 kΩ
< 500
Ω
> 500 ms
Specifications are subject to change without notice (26.09.06)
1
DUA01, PUA01
Supply Specifications
Power supply
Rated operational voltage
through terminals:
A1, A2 or A3, A2 (DUA01)
2, 10 or 11, 10
(PUA01)
724:
748:
B48:
B23:
Dielectric voltage
Supply to input
Supply to output
Input to output
Rated operational power
AC
DC
Overvoltage cat. III
(IEC 60664, IEC 60038)
General Specifications
Reaction time
Alarm ON delay
Alarm OFF delay
< 100 ms
(voltage rising from
-20% to +20% set value)
< 300 ms
(voltage decreasing from
+20% to -20% set value)
(15 min warm-up time)
± 1000 ppm/°C
± 0.5% on full-scale
LED, green
LED, red
(EN 60529)
IP 20
3 (DUA01), 2 (PUA01)
-20 to 60°C, R.H. < 95%
-30 to 80°C, R.H. < 95%
22.5 x 80 x 99.5 mm
36 x 80 x 94 mm
Approx. 150 g
Max. 0.5 Nm
acc. to IEC 60947
UL, CSA (except 748)
Yes
Electromagnetic Compatibillity
According to EN 61000-6-2
According to EN 61000-6-3
24 VDC ± 20%, insulated
48 VDC ± 20%, insulated
24/48 VAC ± 15%
45 to 65 Hz, insulated
115/230 VAC ± 15%
45 to 65 Hz, insulated
DC supply
AC supply
2 kV
4 kV
4 kV
4 kV
4 kV
4 kV
4 VA
2W
Accuracy
Temperature drift
Repeatability
Indication for
Power supply ON
Output relay ON
Environment
Degree of protection
Pollution degree
Operating temperature
Storage temperature
Housing
Dimensions
DUA01
PUA01
Weight
Screw terminals
Tightening torque
Approvals
CE Marking
EMC
Immunity
Emission
Mode of Operation
DUA01 and PUA01 monitor
both AC and DC over voltage.
When connected with MI or
MP
current
transformer
(using the 0.4 - 4 V
p
range)
they can monitor 1-phase or
3-phase AC currents up to
500 A.
Example 1
(connection between termi-
nals Z1, Y1 or 8, 9 - latch
function enabled)
The relay operates and latch-
es in operating position
when the measured value
exceeds the set level. Pro-
vided that the voltage has
dropped min. 4% below the
set point (see hysteresis),
the relay releases when the
interconnection between ter-
minals Z1, Y1 or 8, 9 is inter-
rupted or the power supply
is interrupted as well.
Example 2 (MI CT)
(no connection between ter-
minals Z1, Y1 or 8, 9)
The relay operates when the
current flowing through the
CT exceeds the set level. It
releases when the current
drops min. 4% below the set
level (see hysteresis) or
when power supply is inter-
rupted.
Example 3 (MP CT)
(no connection between ter-
minals Z1, Y1 or 8, 9 - latch
function disabled)
The relay operates when the
maximum current flowing
through the CT exceeds the
set level. It releases when
the maximum current drops
min. 4% below the set level
(see hysteresis) or when
power supply is interrupted.
Range - Level Setting
Adjust the measuring range
setting the DIP switches 1 to
4 as shown below.
To access the DIP switches
open the grey plastic cover
using a screwdriver as
shown below.
Centre knob:
Setting of voltage on relative
scale: from 10 to 110% of the
full-scale value.
Hysteresis:
Approx. 4% of set value, it
can be extended by inserting
a resistor between terminals
Z1, Y1 or 8, 9.
Approx. resistor values:
10%:
180 kΩ
25%:
47 kΩ
50%:
22 kΩ
75%:
15 kΩ
Latch: < 500
Ω
Measuring range
OFF ON OFF OFF
ON OFF OFF OFF
OFF OFF OFF OFF
ON OFF ON OFF
ON OFF OFF ON
0.4 to 4 V
p
2 to 20 VAC/DC
5 to 50 VAC/DC
20 to 200 VAC/DC
50 to 500 VAC/DC
2
Specifications are subject to change without notice (26.09.06)
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