Monitoring Relays
1-Phase True RMS AC/DC Over or Under Voltage
Types DUB03, PUB03
• TRMS AC/DC over or under voltage
monitoring relays
• Selection of measuring range by DIP-switches
• Adjustable voltage on relative scale
• Adjustable hysteresis on relative scale
• Adjustable delay function (0.1 to 30 s)
• Programmable latching or inhibit at set level
• Output: 8 A SPDT relay N.D. or N.E. selectable
• For mounting on DIN-rail in accordance with
DIN/EN 50 022 (DUB03) or plug-in module (PUB03)
• 22.5 mm Euronorm housing (DUB03)
or 36 mm plug-in module (PUB03)
• LED indication for relay, alarm and power supply ON
DUB03
PUB03
Product Description
DUB03 and PUB03 are pre-
cise TRMS AC/DC over or
under voltage (selectable by
DIP-switch)
monitoring
relays.
Owing to the built-in latch
function, the ON-position of
the relay output can be
maintained. Inhibit function
can be used to avoid relay
operation when not desired
(maintenance, transitions).
The LED's indicate the state
of the alarm and the output
relay.
Ordering Key
Housing
Function
Type
Item number
Output
Power supply
DUB 03 C W24
Type Selection
Mounting
DIN-rail
Plug-in
Output
SPDT
SPDT
Frequency
50 - 400 Hz
50 - 400 Hz
Supply: 12 to 240V AC/DC
DUB 03 C W24
PUB 03 C W24
Input Specifications
Input
(voltage level)
DUB03
PUB03
Terminals A1, A2
Terminals 2, 10
Measure their own power
supply
Level
10 to 26 V
10 to 53 V
12 to 127 V
24 to 264 V
50 to 110%
20 to 110%
10 to 110%
10 to 110%
Output Specifications
Output
Rated insulation voltage
Contact ratings
(AgSnO
2
)
AC 1
Resistive loads
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
Measuring ranges
Direct
Selectable by DIP-switch
24 VAC/DC
48 VAC/DC
115 VAC/DC
240 VAC/DC
The input voltage cannot
raise over 300 VAC/DC
with respect to ground
(PUB03 only)
Operating frequency
Dielectric strength
Dielectric voltage
≥
2 kVAC (rms)
Rated impulse withstand volt. 4 kV (1.2/50 µs)
Supply Specifications
Power supply
Rated operational voltage
through terminals:
A1 and A2 (DUB03) or
2 and 10 (PUB03)
Dielectric voltage
Rated operational power
Overvoltage cat. III
(IEC 60664, IEC 60038)
12 to 240 V AC/DC
+10% -15%; 45 to 440 Hz
None
4 VA (AC)
1.5W (DC)
Specifications are subject to change without notice (09.06.10)
1
DUB03, PUB03
General Specifications
Power ON delay
Reaction time
Alarm ON delay
Alarm OFF delay
Accuracy
Temperature drift
Delay ON alarm
Repeatability
Indication for
Power supply ON
Alarm ON
Output relay ON
Environment
Degree of protection
Pollution degree
Operating temperature
Storage temperature
1 s ± 0.5 s or 6 s ± 0.5 s
(input signal variation from
-20% to +20% or from
+20% to -20% of set value)
< 100 ms
< 100 ms
(15 min warm-up time)
± 1000 ppm/°C
± 10% on set value ± 50 ms
± 0.5% on full-scale
LED, green
LED, red (flashing 2 Hz
during delay time)
LED, yellow
IP 20
3 (DUB03), 2 (PUB03)
-20 to 60°C, R.H. < 95%
-30 to 80°C, R.H. < 95%
Housing
Dimensions
Material
Weight
Screw terminals
Tightening torque
Product standard
Approvals
CE Marking
EMC
Immunity
Emissions
DUB03
PUB03
22.5 x 80 x 99.5 mm
36 x 80 x 94 mm
PA66 or Noryl
Approx. 150 g
Max. 0.5 Nm
acc. to IEC 60947
EN 60255-6
UL, CSA
L.V. Directive 2006/95/EC
EMC Directive 2004/108/EC
According to EN 60255-26
According to EN 61000-6-2
According to EN 60255-26
According to EN 61000-6-3
Mode of Operation
DUB03 and PUB03 monitor It releases when the voltage
both AC and DC over or drops below (or exceeds) the
under voltage.
set level (see hysteresis set-
ting), or when power supply is
Example 1
interrupted.
(latch function disabled, ND
relay)
Note
If the voltage drops below the
The relay operates when the minimum power supply volt-
measured value exceeds (or age and the relay is set for
drops below) the set level for undervoltage the output con-
more than the set delay time. tact isn’t necessarily ON.
Example 2
The red LED flashes until the
(latch function enabled, NE delay time has expired or the
relay)
measured value has dropped
below the set point (see hys-
The relay operates and latch- teresis setting).
es in operating position when
the measured value exceeds
(or drops below) the set level
for more than the set delay
time.
The relay releases when
power supply is interrupted.
Function/Range/Level and Time Delay Setting
Adjust the input range set-
ting the DIP switches 1 and
2 as shown below.
Select the desired function
setting the DIP switches 3 to
6 as shown below.
To access the DIP switches
open the grey plastic cover
as shown below.
Selection of level and time
delay:
Upper knob:
Setting of hysteresis on rela-
tive scale: 0 to 30% on set
value.
Centre knob:
Voltage level setting on rela-
tive scale: 10 to 110% on
full scale.
Lower knob:
Setting of delay on alarm
time on absolute scale (0.1
to 30 s).
Measuring range
ON
OFF
ON
OFF
OFF
OFF
ON
ON
24 V
48 V
115 V
240 V
Relay working mode
ON: Normally De-Energized
OFF: Normally Energized
Power ON delay
ON: 6 s ± 0.5 s
OFF: 1 s ± 0.5 s
Contact input
ON: Latching
OFF: Not latching
Monitoring function
ON: Over voltage
OFF: Under voltage
2
Specifications are subject to change without notice (09.06.10)
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