Page top

K8DT-PM

Three-phase Voltage and Phase-sequence Phase-loss Relay

K8DT-PM

Our Value Design Products Increase the Value of Your Control Panels. Protect motors and other equipment from unstable voltages in the power supply system. Protect motors and other equipment by detecting overvoltages, undervoltages, phase sequence, and phase loss for three-phase power supplies.

Ratings

Rated input voltage K8DT-PM1[]N: Three-phase, three-wire Mode:
200, 220, 230, or 240 VAC
K8DT-PM2[]N: Three-phase, three-wire Mode:
380, 400, 415, or 480 VAC
Input load K8DT-PM1: Approx. 1.7 VA
K8DT-PM2: Approx. 2.7 VA
Rated insulation
voltage
528 VAC
Operating value setting
range
Overvoltage
-30% to 30% of rated input voltage
Undervoltage
-30% to 30% of rated input voltage
Note: The rated input voltage can be switched
by using the DIP switches.
Operating value Operates at 100% of set value.
Reset value 5% of operating value (fixed)
Reset method Automatic reset
Operating
time
setting
range
Overvoltage/
Undervoltage
0.1 to 30 s
Phase
sequence
0.1 s±0.05 s
Phase loss 0.1 s max.
Power ON lock time 1 s/5 s (switched by using the DIP switch)
Indicators Power (PWR): Green, Output (OUT): Yellow,
OVER: Red, UNDR: Red
Output form Relay Output: SPDT contact
Transistor Output: 1
Output relay ratings Rated load
5 A at 250 VAC (Resistive load)
5 A at 30 VDC (Resistive load)
1 A at 250 VAC (Inductive load)
0.2 A at 48 VDC (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 flatblade
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×D×H)

Specifications

Input frequency 50/60 Hz
Overload capacity Continuous 528 V
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 (GB14048.5), LR (Category ENV1.2)
Insulation resistance 20 MΩ min.
Between external terminals and case
Between input terminals and output terminals
Dielectric strength 2,000 VAC for one minute
Between external terminals and case
Between input terminals and output terminals
Noise immunity 1,500 V power supply terminal common/normal mode
Square-wave noise of 1 μs/100 ns pulse width with 1-ns rise time
Impulse withstand
voltage
6 kV (between live terminals and exposed, noncharged metal parts)
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