Datasheet

K8AK-PA
7
Setting Method
●Asymmetry
The asymmetry rate is set using the asymmetry rate knob (ASY.)
The setting range is 2% to 22% of the rated input.
Turn the knob while there is an input to the input terminals until the alarm indicator flashes (when the set value and the input have reached the
same level.)
Use this as a guide to make the setting.
The rated input depends on the model and DIP switch setting.
Example: K8AK-PA1 with Pin 2 Turned OFF (Three-phase, Three-wire Mode) and Pins 3 and 4 Turned OFF (Rated Voltage of 200 V)
The rated input voltage is 200 VAC and the setting range is 4 to 44 V.
If the setting (ASY. knob) is at 10%, the asymmetry operation voltage is 20 V and an alarm will be output if the difference between
the minimum and maximum phases for two of the three phases exceeds 20 V.
●Operating Time
The operating time is set using the operating time knob (T).
The operating time can be set to between 0.1 and 30 s.
If the input exceeds the asymmetry set value, the alarm indicator will start flashing for the set period and then stay lit.
Dimensions
(Unit: mm)
Three-phase Asymmetry and Phase-sequence Phase-loss Relays
Optional Parts for DIN Track Mounting
22.5
90
100
5
72
K8AK-PA1
K8AK-PA2
*Dimensions in parentheses are for the PFP-50N.
4.5
15 25 25
10
10
1,000 (500)*
25 25 15 (5)*
35
±0.3
7.3
±0.15
27
±0.15
1
●DIN Tracks
PFP-100N
PFP-50N