Carlo Gavazzi DUA01, PUA01 Catalog Page

Specifications are subject to change without notice (06.11.01) 1

Monitoring Relays

Product Description Ordering Key

Housing
Function
Type
Item number
Output
Power supply
Range

• 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

Type Selection

Input (voltage level) DUA01: T erminals Y1, Y2

PUA01: T erminals 5, 7

Measuring ranges

Direct Int. resist. Max. volt.
Selectable by DIP-switches

2 to 20 VAC/DC > 500 kΩ 600 V
5 to 50 VAC/DC > 500 kΩ 600 V
20 to 200 VAC/DC > 500 kΩ 600 V
50 to 500 VAC/DC > 500 kΩ 600 V

0.4 to 4 V

p

AC > 500 kΩ 600 V

Max. voltage for 1 s: 1000 V

MI and MP CT ranges

AAC rms Max. curr.

1-ph.: 3-ph.:
MI 5 MP 3005 0.5 to 5 A 20 AAC
MI 20 MP 3020 2 to 20 A 50 AAC
MI 100 MP 3100 10 to 100 A 250 AAC
MI 500 MP 3500 50 to 500 A 750 AAC

Note:

The input voltage cannot
raise over 300 VAC/DC with
respect to ground (PUA01 only)

Contact input

DUA01 Terminals Z1, Y1
PUA01 Terminals 8, 9
Disabled > 10 kΩ
Enabled < 500 Ω
Latch disable > 500 ms

1-Phase AC/DC Over Voltage - AC Over Current
Types DUA01, PUA01

Input Specifications

Output SPDT relay

Rated insulation voltage 250 VAC

Contact ratings (AgSnO2)µ

Resistive loads AC 1 8 A @ 250 VAC

DC 12 5 A @ 24 VDC

Small inductive loads AC 15 2.5 A @ 250 VAC

DC 13 2.5 A @ 24 VDC

Mechanical life ≥ 30 x 106operations
Electrical life ≥ 105operations

(at 8 A, 250 V, cos ϕ = 1)

Operating frequency ≤ 7200 operations/h
Dielectric strength

Dielectric voltage

≥ 2 kVAC (rms)

Rated impulse withstand volt. 4 kV (1.2/50 µs)

Output Specifications

DUA 01 C B23 500V

DUA01 and PUA01 are pre­cise AC/DC over voltage
monitoring relays. They can
also be used as 1-phase or 3­phase 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 main­tained.
The red LED indicates the
alarm status.

DUA01

PUA01

Mounting Output Supply: 24 VDC Supply: 48 VDC Supply: 24/48 VAC Supply: 115/230 VAC

DIN-rail SPDT DUA 01 C 724 500V DUA 01 C 748 500V DUA 01 C B48 500V DUA 01 C B23 500V
Plug-in SPDT PUA 01 C 724 500V PUA 01 C 748 500V PUA 01 C B48 500V PUA 01 C B23 500V

2 Specifications are subject to change without notice (06.11.01)

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

DUA01, PUA01

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 termi­nals Z1, Y1 or 8, 9 - latch
function enabled)

The relay operates and latch­es in operating position
when the measured value
exceeds the set level. Pro­vided that the voltage has
dropped min. 4% below the
set point (see hysteresis),
the relay releases when the
interconnection between ter­minals Z1, Y1 or 8, 9 is inter­rupted or the power supply
is interrupted as well.

Example 2 (MI CT)

(no connection between ter­minals 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 inter­rupted.

Example 3 (MP CT)

(no connection between ter­minals 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.

Power supply

Overvoltage cat. III
Rated operational voltage (IEC 60664, IEC 60038)
through terminals:

A1, A2 or A3, A2 (DUA01)
2, 10 or 11, 10 (PUA01)

724: 24 VDC ± 20%, insulated
748: 48 VDC ± 20%, insulated

B48: 24/48 VAC ± 15%

45 to 65 Hz, insulated

B23: 115/230 VAC ± 15%

45 to 65 Hz, insulated

Dielectric voltage DC supply AC supply

Supply to input 2 kV 4 kV
Supply to output 4 kV 4 kV
Input to output 4 kV 4 kV

Rated operational power

AC 4 VA
DC 2 W

Supply Specifications

Reaction time

Alarm ON delay < 100 ms

(voltage rising from

-20% to +20% set value)

Alarm OFF delay < 300 ms

(voltage decreasing from
+20% to -20% set value)

Accuracy (15 min warm-up time)

Temperature drift ± 1000 ppm/°C
Repeatability ± 0.5% on full-scale

Indication for

Power supply ON LED, green
Output relay ON LED, red

Environment (EN 60529)

Degree of protection IP 20
Pollution degree 3 (DUA01), 2 (PUA01)
Operating temperature -20 to 60°C, R.H. < 95%
Storage temperature -30 to 80°C, R.H. < 95%

Housing dimensions

DIN-rail version 22.5 x 80 x 99.5 mm
Plug-in version 36 x 80 x 87 mm

Weight Approx. 150 g
Screw terminals

Tightening torque Max. 0.5 Nm

acc. to IEC 60947

Approvals UL, CSA (except 748)
CE Marking Yes
EMC

Electromagnetic Compatibillity

Immunity According to EN 61000-6-2
Emission According to EN 50081-1

General Specifications

Measuring range

OFF ON OFF OFF 0.4 to 4 V

p

ON OFF OFF OFF 2 to 20 VAC/DC
OFF OFF OFF OFF 5 to 50 VAC/DC
ON OFF ON OFF 20 to 200 VAC/DC
ON OFF OFF ON 50 to 500 VAC/DC