Specifications are subject to change without notice (07.09.06) 1
Monitoring Relays
3-Phase Voltage selection
Type DPA55
Product Description Ordering Key
Housing
Function
Type
Item number
Output
Power supply
• 3-phase monitoring relay for phase
sequence
•Detects if voltage is at the desired level (± 10% or ±15%)
• Measures own power supply
• Wide power supply range: 208 to 480 VAC (±15%)
• Output: 5 A SPDT relay normally energized
• For mounting on DIN-rail in accordance with
DIN/EN 50 022
• 17.5 mm DIN-rail housing (DIN 43880)
• LED indication for relay and power supply ON
Type Selection
Mounting Output Supply: 208 to 480 VAC
DIN-rail SPDT DPA 55 C M44
Input
L1, L2, L3 Terminals L1, L2, L3
Measures on own supply
Measuring range 177 to 550 VAC
Hysteresis <3V
Input Specifications
Output SPDT relay, N.E.
Rated insulation voltage 250 VAC
Contact ratings (AgSnO2)µ
Resistive loads AC 1 5 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
≥2kVAC (rms)
Rated impulse withstand volt. 4kV (1.2/50 µs)
Output Specifications
DPA 55 C M44
3-Phase relay for detection of
incorrect mains voltage. Also
detecting incorrect phase
sequence and phase loss.
This unit allows to stop
incorrect power supply volt-
age when different from the
desired one.
Power supply range from 208
to 480 VAC plus selection of
the different possible nominal
voltages. For mounting on
DIN-rail. Housing 17.5 mm
wide suitable both for back
and front panel mounting.
Power supply
Overvoltage cat. II
Rated operational voltage (IEC 60664, IEC 60038)
through terminals: L1, L2, L3 208 to 480 VAC ± 15%,
45 to 65 Hz
Rated operational power
18 VA@400 VAC, 50 Hz
Supplied by L1 and L3
Supply Specifications
2Specifications are subject to change without notice (07.09.06)
DPA55
Mode of Operation
DPA55 monitors its own
3- phase power supply.
The relay operates when all
the phases arepresent, the
phase sequence is correct
and each phase-phase volt-
age is within the desired tol-
erance (± 10% or ± 15%).
Example 1
The relay monitors that the
power supply is the correct
one for the required equip-
ment.
Example 2
The relay releases in case of
incorrect phase sequence or
when the voltage is outside
the set limits.
Reaction time
Alarm ON delay < 100 ms
Alarm OFF delay < 300 ms
Accuracy (15 min warm-up time)
Temperature drift ± 1000 ppm/°C
Repeatability ± 0.5% on full scale
Indication for
Power supply ON LED, green
Relay ON LED, yellow
Environment
Degree of protection IP 20
Pollution degree 2
Operating temperature
@Max. voltage, 50 Hz -20 to +60°C, R.H. < 95%
@Max. voltage, 60 Hz -20 to +50°C, R.H. < 95%
Storage temperature -30 to +80°C, R.H. < 95%
General Specifications
Range setting
Select the proper nominal
voltage level using DIP-
switches as shown below.Voltage window
ON: ± 15 %
OFF: ±10 %
Measuring range
SW2 SW3 SW4
208 VAC OFF OFF OFF
220 VAC OFF OFF ON
230 VAC OFF ON OFF
240 VAC OFF ON ON
380 VAC ON OFF OFF
400 VAC ON OFF ON
415 VAC ON ON OFF
480 VAC ON ON ON
Housing
Dimensions 17.5 x 81 x 67.2 mm
Material PA66
Weight Approx. 80 g
Screw terminals
Tightening torque Max. 0.5 Nm
acc. to IEC 60947
Approvals UL, CSA
CE Marking Yes
EMC Electromagnetic Compatibility
Immunity According to EN 61000-6-2
Emission According to EN 61000-6-3
Specifications are subject to change without notice (07.09.06) 3
DPA55
67.2
18.7
45
17.5
81
2
Dimensions
Operation Diagrams
L1
L2
L3
L2
L1
L3
L3
L2
L1
L1
L2
L3
Relay ON
Voltage
window
Set level
Power supply
Relay ON
Wiring Diagrams
Example 1 Example 2
L1- L2
L2- L3
L3- L1
