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K8AK-PA

Features

3-phase asymmetry, phase-sequence, phase-loss relay

Monitors voltage asymmetry, phase sequence and phase loss for 3-phase 3-wire or 4-wire power supplies, in one unit.

  • Worldwide power specifications supported by one unit
  • Phase sequence, phase loss: operation reaction time 0.1s maximum
  • Asymmetry: operation time setting from 0.1 to 30s
  • Reset method: automatic
  • Power ON lock: 1s or 5s
Specifications & ordering info

Ordering information

Rated input

Order code

3-phase 3-wire mode

200, 220, 230, 240 VAC

K8AK-PA1

3-phase 4-wire mode

115, 127, 133, 138 VAC

3-phase 3-wire mode

380, 400, 415, 480 VAC

K8AK-PA2

3-phase 4-wire mode

220, 230, 240, 277 VAC

Specifications

Ambient operating temperature

-20 to 60°C (with no condensation or icing)

Storage temperature

-25 to 65°C (with no condensation or icing)

Altitude

2,000 m max.

Input frequency

50/60 Hz (AC power supply)

Output relays
(1 × SPDT, normally closed operation)

Resistive load

5 A at 250 VAC or at 30 VDC

Maximum contact voltage

250 VAC or 30 VDC

Maximum contact current

5 A

Maximum switching capacity

1,250 VA, 150 W

Mechanical life

10,000,000 operations

Electrical life

50,000 operations at 5 A, 250 VAC or 30 VDC

Degree of protection

Terminal section: IP20

Case material

PC and ABS

Weight

Approx. 130 g

Rated input voltage

K8AK-PA1

3-phase, 3-wire mode: 200, 220, 230, 240 VAC, 3-phase, 4-wire mode: 115, 127, 133, 138 VAC

K8AK-PA2

3-phase, 3-wire mode: 380, 400, 415, 480 VAC, 3-phase, 4-wire mode: 220, 230, 240, 277 VAC

Asymmetry operation (ASY.)

Operating value setting range

Asymmetry rate: 2% to 22%

Operating value

100% operation at set value

Asymmetry operating value = rated input voltage x asymmetry set value [%]

The asymmetry operation will function when the difference between the highest and lowest voltage phases equals or exceeds the asymmetry operating value

Reset (HYS.)

Hysteresis

5% of operating value (fixed)

Resetting method

Automatic reset

Operating time (T)

Asymmetry

0.1 s to 30 s

Phase-sequence, phase-loss

0.1 s max.

Power ON lock (LOCK)

1 s or 5 s (Changed with the DIP switch)

Overload capacity

Continuous input at 115% of maximum input, 10 s at 125% (up to 600 VAC)

Repeat accuracy

Operating value

±0.5% full scale (at 25°C and an ambient humidity of 65% at the rated power supply voltage, DC or 50/60 Hz sine wave input)

Operating time

±50 ms (at 25°C and 65% humidity, rated power supply voltage)

Indicators

Power (PWR): Green LED, relay output (RY): Yellow LED, alarm outputs (ALM 1/2): Red LED

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 and CCC

Size in mm (H × W × D)

90 × 22.5 × 100