6
Three-phase Phase-sequence Phase-loss Relay
K8AB-PM
Cat. No. N146-E1-02
■
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.
Load
Voltage input
Signal output
14
12
L1
L2
L3
11
L1
N
L2 L3
Signal output
24
22
21
Undervoltage
Phase loss,
reversed phase
Overvoltage
N
ON
OFF
SW1
SW2
SW3
SW4
DIP switch
DIP Switch Functions
K8AB-PM1
Note:
All pins are set to OFF at the factory.
K8AB-PM2
Note:
All pins are set to OFF at the factory.
SWITCH
ON
●
↑
OFF
❍
↓
Power ON lock
time
5 s
---
---
---
●
1 s
---
---
---
❍
Number of wires Three-phase, four-wire
---
---
●
---
Three-phase, three-wire
---
---
❍
---
Rated voltage
Three-phase,
three-wire
Three-phase,
four-wire
240 V
138 V
●
●
---
---
230 V
133 V
●
❍
---
---
220 V
127 V
❍
●
---
---
200 V
115 V
❍
❍
---
---
SWITCH
ON
●
↑
OFF
❍
↓
Power ON lock
time
5 s
---
---
---
●
1 s
---
---
---
❍
Number of wires Three-phase, four-wire
---
---
●
---
Three-phase, three-wire
---
---
❍
---
Rated voltage
Three-phase,
three-wire
Three-phase,
four-wire
480 V
277 V
●
●
---
---
415 V
240 V
●
❍
---
---
400 V
230 V
❍
●
---
---
380 V
220 V
❍
❍
---
---
ON
OFF
4
3
3
2
1
ON
OFF
4
3
3
2
1
