Monitoring Relays
DC Under Voltage
Type DUA52
Product Description
DUA52 is a voltage monitoring relay that measure its own
power supply. The measuring ranges are 8-28 VDC and 38-
58 VDC. It has separate potentiometers for setpoint and
hysteresis.
The typical applications are monitoring of backup batteries,
batteries on diesel generator sets and the like.
Property
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DC undervoltage monitoring relay
Measuring if power supply is below the set level
Measures its own power supply
Measuring ranges: 8 - 28 V DC and 38 - 58 V DC
Adjustable hysteresis: 4 to 50%
Output: 5 A SPDT NE relay
For mounting on DIN-rail in accordance with
DIN/EN 50 022
• 17.5 mm housing (DIN 43880)
• LED indication for relay and power supply ON
Type Selection
Mounting
DIN-rail
DIN-rail
Output
SPDT
SPDT
Measuring range
8 to 28 VDC
38 to 58 VDC
Supply : 12/24 VDC
DUA 52 C 724
DUA 52 C 748
Supply: 48 VDC
Input Specifications
Input
(voltage level)
Terminals A1, A2
Measures its own power
supply
Level
38 to 58 VDC
8 to 28 VDC
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
5 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
48 VDC
12 to 24 VDC
Supply Specifications
Power supply
Rated operational voltage
through terminals:
A1 and A2
724
748
Dielectric voltage
Dielectric voltage
Supply to output
Rated operational power
Overvoltage cat. III
(IEC 60664, IEC 60038)
8 to 28 VDC
38 to 58 VDC
None
2 kV
1.5 W
Operating frequency
Dielectric strength
Dielectric voltage
2 kVAC (rms)
Rated impulse withstand volt. 4 kV (1.2/50 μs)
1
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