Omron, K8AK-TS / PT

Temperature, phase sequence, and phase loss monitoring with the DIN 22.5-mm-sized K8AK-PT Relays.
Side-by-side mounting of K8AK-PT Relays.
Specially designed for internal motor monitoring; no setting required.
Test/Reset Button for confirmation of output operation.
Monitoring also performed for thermistor disconnections and short circuits.
Manual or automatic resetting with the same Relay.

last update: April 3, 2017

Ratings

Power supply voltage	Isolated power supply	24 VAC/DC 100 to 240 VAC
Power consumption		24 VAC/DC: 1.8 VA/1.0 W max. 100 to 240 VAC: 3.5 VA max.
Rated input voltage		3-phase, 200 to 480 VAC (3-wire)
Operating time	Phase sequence on three- phase voltage input	0.1 s±0.05 s
	Phase loss on three-phase voltage input	0.1 s max. (when the voltage changes rapidly from 100% to 0% of rated voltage)
	PTC thermistor input	0.2 s max.
Reset method		Manual reset/automatic reset (switchable) Note: Manual reset method: Press the TEST/RESET button.
Indicators		Power (PWR): Green, PH_Alarm outputs (ALM): Red, TS_Alarm outputs (ALM): Red
Output relays		One SPDT relay output (normally closed operation)
Output relay ratings		Rated load Resistive load 5 A at 250 VAC 5 A at 30 VDC Maximum switching capacity: 1,250 VA, 150 W 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
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% (with no condensation)
Storage humidity		25% to 85% (with no condensation)
Altitude		2,000 m max.
Terminal screw tightening torque		0.49 to 0.59 Nm
Terminal wiring method		Recommended wire Solid wire: 2.5 mm² 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		N1.5
Case material		PC and ABS, UL 94 V-0
Weight		Approx. 150 g
Mounting		Mounts to DIN Track.
Dimensions		22.5 × 90 × 100 mm (W × H × D)

Specifications

Allowable operating voltage range		85% to 110% of rated power supply voltage
Allowable operating frequency range		50/60 Hz ±5 Hz
Input frequency		50/60 Hz
Input overload capacity		Continuous 528 V
Phase loss detection level		80%±10% of rated input If any phase-to-phase voltage drops to 80%±10% of the other phase-to- phase voltages, voltage asymmetry is detected and the phase loss function is performed.
PTC thermistor	Operating value precision	3,100 Ω ±5%
	Reset value precision	1,650 Ω ±5%
	Short circuit detection value precision	0 to 10 Ω ±5 Ω
	Temperature drift	±0.1%/°C max.
Operating time repeatability		±50 ms
Applicable standards	Conforming standards	EN 60947-5-1 Installation environment (pollution level 2, installation category III)
	EMC	EN 60947-5-1
	Safety standards	UL 508 (Recognition), Korean Radio Waves Act (Act 10564), CSA: C22.2 No.14, CCC: GB14048.5
Insulation resistance		20 MΩ min. 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
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
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

last update: April 3, 2017

Thermistor Motor Protection Relays

K8AK-TS1
K8AK-PT1

TITLE	DOCUMENT TYPE	SIZE
K8AK-TS/PT	Catalog	1188 KB
K8AK-TS1/PT1 Thermistor motor protection relay instruction sheet (Precautions for Safe Use)	Manual	66 KB

Ratings

Specifications

Thermistor Motor Protection Relays

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