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■ Operation and Setting Methods
Connections
1. Input
Connect to L1, L2, and L3 (for three-phase three-wire mode) or L1, L2, L3, and N (for three-phase four-
wire mode), depending on the mode selected using pin 2 on the DIP switch.
The Unit will not operate correctly if the DIP switch setting and the wiring do not agree.
Make sure the phase sequence is wired correctly. The Unit will not operate normally if the phase
sequence is incorrect.
2. Outputs
Terminals 11, 12, and 14 are the output terminals for overvoltage (SPDT).
Terminals 21, 22, and 24 are the output terminals for undervoltage, phase loss, and reversed phase
(SPDT).
DIP Switch Settings
The power ON lock time, number of wires, and rated voltage are set using the DIP switch located on the bottom of the Unit.
ON
OFF
SW1
SW2
DIP switch
SW3
SW4
6
Three-phase Phase-sequence Phase-loss Relay
DIP Switch Functions
K8AB-PM1
SWITCH
Power ON lock
5 s
time
1 s
Number of wires Three-phase, four-wire
Three-phase, three-wire
Rated voltage
Three-phase,
three-wire
240 V
230 V
220 V
200 V
Note: All pins are set to OFF at the factory.
K8AB-PM2
SWITCH
Power ON lock
5 s
time
1 s
Number of wires Three-phase, four-wire
Three-phase, three-wire
Rated voltage
Three-phase,
three-wire
480 V
415 V
400 V
380 V
Note: All pins are set to OFF at the factory.
K8AB-PM
N
L1
Load
ON ● ↑
4
ON
OFF ❍ ↓
OFF
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Three-phase,
four-wire
●
●
138 V
●
❍
133 V
❍
●
127 V
❍
❍
115 V
ON ● ↑
4
ON
OFF ❍ ↓
OFF
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Three-phase,
four-wire
●
●
277 V
●
❍
240 V
❍
●
230 V
❍
❍
220 V
L2 L3
Voltage input
L1
L2
N
L3
14
11
Signal output
12
Overvoltage
24
21
Signal output
22
Undervoltage
Phase loss,
reversed phase
3 3
2
1
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3 3
2
1
●
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❍
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❍
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Cat. No. N146-E1-02
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