Cat. No. N142-E1-02
Single-phase Current Relay
K8AB-AS
3
■
Ratings
Note:
Models with a 24-VDC power supply have a non-isolated power supply; the inputs and power supply are connected internally. If both the
input and power supply are grounded, an unwanted current path will be created and the Unit will not operate normally.
If an unwanted current path exists, use a K8AB model with an AC power supply or use an isolated DC power supply.
Power supply
voltage
Non-isolated power supply
24 VDC (See note.)
Isolated power supply
24 VAC, 100 to 115 VAC, 200 to 230 VAC
Power consumption
24 VDC:
1 W max.
24 VAC:
4 VA max.
100 to 115 VAC: 4 VA max.
200 to 230 VAC: 5 VA max.
Operating value setting range (SV)
10% to 100% of maximum measuring current
K8AB-AS1: 2 to 20 mA AC/DC
10 to 100 mA AC/DC
50 to 500 mA AC/DC
K8AB-AS2: 0.1 to 1 A AC/DC
0.5 to 5 A AC/DC
0.8 to 8 A AC/DC
K8AB-AS3: When used together with a K8AC-CT200L Current Transformer
10 to 100 A AC
20 to 200 A AC
Operating value
100% operation at set value
Reset value setting range (HYS.)
5% to 50% of operating value
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)
Note:
Enabled only for overcurrent operation.
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, Relay output (RY): Yellow, Alarm outputs (ALM): Red
Input impedance
Refer to the
on the previous page.
Output relays
One SPDT relay (NO/NC switched using DIP switch.)
Output relay ratings
Rated load
Resistive load
6 A at 250 VAC (cos
φ
= 1)
6 A at 30 VDC (L/R = 0 ms)
Inductive load
1 A at 250 VAC (cos
φ
= 0.4)
1 A at 30 VDC (L/R = 7 ms)
Maximum contact voltage:
250 VAC
Maximum contact current:
6 A AC
Maximum switching capacity: 1,500 VA
Minimum load:
10 mA at 5 VDC
Mechanical life:
10,000,000 operations
Electrical life:
Make: 50,000 times, Break: 30,000 times
Ambient operating temperature
−
20 to 60°C (with no condensation or icing)
Storage temperature
−
40 to 70°C (with no condensation or icing)
Ambient operating humidity
25% to 85% (with no condensation)
Storage humidity
25% to 85% (with no condensation)
Altitude
2,000 m max.
Terminal screw tightening torque
0.49 N·m
Terminal wiring method
Recommended wire
Solid wire:
2.5 mm
2
Twisted wires: AWG16, AWG18
Note: 1.
Ferrules with insulating sleeves must be used with twisted wires.
2.
Two wires can be twisted together.
Recommended ferrules
Al 1,5-8BK (for AWG16) manufactured by Phoenix Contact
Al 1-8RD (for AWG18) manufactured by Phoenix Contact
Al 0,75-8GY (for AWG18) manufactured by Phoenix Contact
Case color
Munsell 5Y8/1
Case material
ABS resin (self-extinguishing resin) UL94-V0
Weight
DC models: Approx. 110 g
AC models: Approx. 150 g
Mounting
Mounted to DIN Track or via M4 screws (tightening torque: 1.2 N·m)
Dimensions
22.5 (W)
×
90 (H)
×
100 (D) mm
