Cat. No. N146-E1-02
Three-phase Phase-sequence Phase-loss Relay
K8AB-PM
5
Nomenclature
■
Front
Indicators
Note:
The input across L1 and L2 is used for the internal power
supply. Therefore, the power indicator will not be lit if there is no
input across L1 and L2.
Setting Knobs
Note: 1.
Use either a solid wire of 2.5 mm
2
maximum or a ferrule with
insulating sleeve for the terminal connection.
The length of the exposed current-carrying part inserted
into the terminal must be 8 mm or less to maintain dielectric
strength after connection.
Recommended ferrules
Phoenix Contact
•
Al 1,5-8BK (for AWG16)
•
Al 1-8RD (for AWG18)
•
Al 0,75-8GY (for AWG18)
2.
Tightening torque
Recommended: 0.49 N·m
Maximum: 0.54
N·m
Power indicator
Relay status indicator
Overvoltage knob
(OVER)
Undervoltage knob
(UNDER)
Operating time knob (T)
Alarm indicator
Terminal block
(See notes 1 and 2.)
Terminal block
(See notes 1 and 2.)
0.1
Item
Meaning
Power indicator
(PWR: Green)
Lit when power is being supplied (see note).
Relay status indicator
(RY: Yellow)
Lit when relay is operating (normally lit).
Alarm
indicator
Overvoltage:
Red
Lit when there is an overvoltage.
The indicator flashes to indicate the error status after
the overvoltage has exceeded the threshold value
while the operating time is being clocked.
Undervoltage:
Red
•
Lit when there is an undervoltage or phase loss.
The indicator flashes to indicate the error status
after the undervoltage has exceeded the threshold
value while the operating time is being clocked.
•
Lit when there is a phase sequence error.
Item
Usage
Overvoltage knob
(OVER)
Can be set between
−
30% and 25% of the rated
input.
Undervoltage knob
(UNDER)
Can be set between
−
30% and 25% of the rated
input.
Operating time knob (T) Used to set the operating time to 0.1 to 30 s.
For 2.5 mm
2
or
smaller solid wires
For ferrules with
insulating sleeves
8 mm max.
8 mm max.
