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Industrial Automation
K8DT-AW
Single-phase Overcurrent/Undercurrent Relay
Our Value Design Products Increase the Value of Your Control Panels. Detect errors in motors and other equipment through current changes. Monitor for overcurrents and undercurrents simultaneously with one Relay.
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last update: March 1, 2019
Input Range
| Model | Range *1 | Connection terminal | Setting range | Input impedance | Input type | Overload capacity |
|---|---|---|---|---|---|---|
| K8DT-AW1[][] | 20 mA AC/DC | I1-COM | 2 to 20 mA AC/DC | Approx. 5 Ω | Direct input | Continuous input at
120% of maximum input. 1 s at 150% |
| 100 mA AC/DC | I2-COM | 10 to 100 mA AC/DC | Approx. 1 Ω | |||
| 500 mA AC/DC | I3-COM | 50 to 500 mA AC/DC | Approx. 0.2 Ω | |||
| K8DT-AW2[][] | 1 A AC/DC | I1-COM | 0.1 to 1 A AC/DC | Approx. 0.12 Ω
(Load: 0.5 VA) |
Direct input or
commercially available CT |
|
| 5 A AC/DC | I2-COM | 0.5 to 5 A AC/DC | Approx. 0.02 Ω
(Load: 1.5 VA) |
|||
| K8DT-AW3[][] | 100 A AC | I2-COM | 10 to 100 A AC *2 | --- | OMRON CT | Continuous input at 120% with an
OMRON CT (K8AC-CT200L). 30 s at 200% 1 s at 600% * CT capacity on primary side. |
| 200 A AC | I3-COM | 20 to 200 A AC *2 | --- |
*1. The range is selected using connected terminals.
*2. The K8DT-AW3 is designed to be used in combination with an OMRON K8AC-CT200L Current Transformer (CT). (Direct input is not possible.)
Ratings
| Power supply voltage | K8DT-AW[][]D: 24 VAC 50/60Hz, 24 VDC
K8DT-AW[][]A: 100 to 240 VAC 50/60Hz |
|---|---|
| Power consumption | 24 VAC/DC: 1.8 VA/1 W max.
100 to 240 VAC: 2.5 VA max. |
| Rated insulation
voltage |
600 VAC |
| Operating value setting
range (AL1, AL2) |
10% to 100% of the maximum value of the setting range
K8DT-AW1: 2 to 20 mA AC/DC 10 to 100 mA AC/DC 50 to 500 mA AC/DC K8DT-AW2: 0.1 to 1 A AC/DC (Compatible with commercially available CTs.) 0.5 to 5 A AC/DC (Compatible with commercially available CTs.) K8DT-AW3: When used with the OMRON CT (K8AC-CT200L). 10 to 100 A AC 20 to 200 A AC |
| Operating value | 100% operation at set value |
| Reset value | 5% of operating value (fixed) |
| Reset method | Manual reset/automatic reset (switchable)
Note:Manual reset: Turn OFF power supply for 1 s or longer. |
| Operating time setting
range (T) |
0.1 to 30 s |
| Startup lock time
setting range (LOCK) |
0 to 30 s
(The startup lock timer starts when the input has reached approximately 30% or more of the set value.) Note:Enabled only for overcurrent operation. |
| Indicators | Power (PWR): Green, Output (OUT): Yellow,
Alarm output 1 (ALM1): Red, Alarm output 2 (ALM2): Red |
| Input impedance | Refer to Input Range on catalog. |
| Output form | Relay Output: SPDT contact
Transistor Output: 1 |
| Output relay ratings | Rated load:
250 VAC 5 A or 30 VDC 5 A (resistive load), 250 VAC 1 A (inductive load), 48 VDC 0.2 A (inductive load) Minimum load: 5 VDC, 10 mA (reference values) Mechanical life: 10 million operations min. Electrical life: 5 A at 250 VAC or 30 VDC: 50,000 operations 3 A at 250 VAC or 30 VDC: 100,000 operations |
| Transistor output
ratings |
Rated voltage: 24 VDC (maximum voltage: 26.4 VDC)
Maximum current: 50 mA DC |
| Ambient operating
temperature |
-20 to 60°C (with no condensation or icing) |
| Storage temperature | -25 to 65°C (with no condensation or icing) |
| Ambient operating
humidity |
25% to 85% RH (with no condensation) |
| Storage humidity | 25% to 85% RH (with no condensation) |
| Altitude | 2,000 m max. |
| Applicable wires | Stranded wires, solid wires, or ferrules |
| Applicable wire size | 0.25 to 1.5 mm2 (AWG24 to AWG16) |
| Wire insertion force | 8 N max. for AWG20 wire |
| Screwdriver insertion force | 15 N max. |
| Wire stripping length | 8 mm |
| Ferrule length | 8 mm |
| Recommended
flat-blade screwdriver |
XW4Z-00B (Omron)
SZF 0.4 ×2.5 (Phoenix Contact) 210-719 (Wago) SDI 0.4 ×2.5 ×75 (Weidmuller) |
| Current capacity | 10 A (per pole) |
| Number of insertions | 50 times |
| Case color | N1.5 |
| Case material | PC, UL 94 V-0 |
| Weight | Approx. 100 g |
| Mounting | Mounts to DIN Track, or screw mounting |
| Dimensions | 17.5 × 90 × 90 mm (W×H×D) |
Specifications
| Allowable operating
voltage range |
85% to 110% of power supply voltage | |
|---|---|---|
| Allowable operating
frequency range |
50/60 Hz ±5 Hz | |
| Input frequency range | K8DT-AW1 and K8DT-AW2: DC input or AC input (45 to 65 Hz)
K8DT-AW3: AC input (45 to 65 Hz) |
|
| Overload capacity | K8DT-AW1 and K8DT-AW2: Continuous input at 120% of maximum
input, 1 s at 150% K8DT-AW3: Continuous input at 120%, 30 s at 200%, and 1 s at 600% with an OMRON CT (K8AC-CT200L). Note:CT capacity on primary side. |
|
| Repeat
accuracy |
Operating
value |
±0.5% full scale (at 25°C and 65% humidity, rated power supply voltage) |
| Operating
time |
±50 ms (at 25°C and 65% humidity, rated power supply voltage) | |
| Applicable
standards |
Conforming
standards |
EN 60947-5-1
Installation environment (pollution level 2, Overvoltage category III) |
| EMC | EN 60947-5-1 | |
| Safety
standards |
UL 60947-5-1 (Listing), Korean Radio Waves Act (Act 10564),
CCC (GB/T 14048.5) * |
|
| Insulation resistance | 20 MΩmin.
Between external terminals and case Between power supply terminals and input terminals Between power supply terminals and output terminals Between input terminals and output terminals |
|
| Dielectric strength | 2,000 VAC for one minute
Between external terminals and case Between power supply terminals and input terminals Between power supply terminals and output terminals Between input terminals and output terminals |
|
| Impulse withstand voltage | 6 kV (between live terminals and exposed, non-charged metal parts) | |
| Noise immunity | Square-wave noise of 1-μs/100-ns pulse width with 1-ns rise time
100 to 240 VAC: 1,500 V power supply terminal common/normal mode 24 VAC: 1,500 V power supply terminal common/normal mode 24 VDC: 480 V power supply terminal common |
|
| Vibration resistance | Frequency: 10 to 55 Hz, 0.35-mm single amplitude
10 sweeps of 5 min each in X,Y, and Z directions |
|
| Shock resistance | 100 m/s2, 3 times each in 6 directions along 3 axes | |
| Degree of protection | Terminals: IP20 | |
* K8DT-AW[]TD is not applied.
last update: March 1, 2019
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