Feature of K8AK-PH Phase-sequence Phase-loss Relay
• Greater resistance to inverter noise.
• Distinguishes between correct phases, phase sequence, and phase loss when power is turned ON.
• Supports phase loss detection when the motor is operating.
• 5 A (resistive load) at 250 VAC, DPDT x 1.
• Output status can be monitored using LED indicator.
• Ideal to prevent reverse operation of motors.
Specifications of K8AK-PH Phase-sequence Phase-loss Relay
| Rated input voltage | 3-phase, 200 to 480 VAC (3-wire) | |
|---|---|---|
| Input load | Approx. 4.1 VA | |
| Operating time | Phase sequence | 0.1 s±0.05 s |
| Phase loss | 0.1 s max. (when the voltage changes rapidly from 100% to 0% of rated voltage) | |
| Reset method | Automatic reset | |
| Indicators | Power (PWR): Green, Relay output (RY): Yellow | |
| Output relays | One DPDT relay (NC operation) | |
| Output relay ratings | Rated load Resistive load 5 A at 250 VAC 5 A at 30 VDC Minimum load: 24 VDC, 4 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/30 VDC:100,000 operations 1 A, cos θ = 0.4 at 250 VAC: 100,000 operations 0.2 A, L/R = 100 ms at 48 VDC: 12,000 operations Recommended fuse: NT00-6A |
|
| Rated operating voltage (Ue) Rated operating current (Ie) |
AC-12 Ue:250VAC, Ie:5 A AC-15 Ue:250VAC, Ie:1 A DC-12 Ue:30VDC, Ie:5 A DC-13 Ue:24VDC, Ie:0.9 A DC-13 Ue:48VDC, Ie:0.2 A DC-13 Ue:24VDC, Ie:0.05 A |
|
| 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 N·m | |
| 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. Note: 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. 130 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 input voltage | |
|---|---|---|
| Input voltage range | 200 to 480 VAC | |
| Input frequency | 50/60 Hz (no presumed range) | |
| Overload capacity | Continuous 528 V | |
| Phase loss detection level | 80%±10% of rated input Calculation Formula = 1 – ((Highest phase-to-phase voltage – Lowest phase-to-phase voltage)/ Average three-phase phase-to-phase voltage) |
|
| 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: GB/T 14048.5 |
|
| Insulation resistance | 20 MΩ min. Between external terminals and case Between input terminals and output terminals |
|
| Rated insulation voltage | 690 V | |
| Dielectric strength | 2,000 VAC for one minute Between external terminals and case Between input terminals and output terminals |
|
| Rated impulse withstand voltage | 6 kV | |
| 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 | IP40 (Terminals: IP20) | |
| Conditional short-circuit current | 1,000 A | |
