Three-phase Phase-sequence Phase-loss Relay
K8AB-PM
CSM_K8AB-PM_DS_E_3_1
Ideal for monitoring 3-phase power supplies
for industrial facilities and equipment.
• Monitor overvoltages, undervoltages, phase sequence, and
phase loss for three-phase 3-wire or 4-wire power supplies with
just one Unit.
Switch setting for 3-phase 3-wire or 3-phase 4-wire power
supply.
• Two SPDT output relays, 6 A at 250 VAC (resistive load).
Output overvoltages and undervoltages using separate relays.
• World-wide power specifications supported by one Unit
(switchable).
• Output status can be monitored using LED indicator.
Refer to
Safety Precautions for the K8AB
Series.
Refer to page 8 for the Q&A section.
Model Number Structure
■
Model Number Legend
K8AB-@@
1
2 3
1. Basic Model
K8AB: Measuring and Monitoring Relays
2. Functions
PM: Three-phase Phase-sequence Phase-loss Relay (Simultaneous upper and lower monitoring)
3. Rated Input Voltage
1:
115, 127, 133, 138, 200, 220, 230, 240 VAC
2:
220, 230, 240, 277, 380, 400, 415, 480 VAC
Ordering Information
■
List of Models
Three-phase Phase-sequence Phase-loss Relay
Rated input (See note 2.)
3-phase 3-wire mode
200, 220, 230, 240 VAC
Model
K8AB-PM1
3-phase 4-wire mode
115, 127, 133, 138 VAC
3-phase 3-wire mode
380, 400, 415, 480 VAC
K8AB-PM2
3-phase 4-wire mode
220, 230, 240, 277 VAC
Note: 1.
Three-phase 3-wire or 4-wire and the input range are switched using a DIP switch.
2.
The power supply is shared with the rated input voltage.
1
K8AB-PM
Ratings and Specifications
■
Ratings
Rated input
voltage
K8AB-PM1
K8AB-PM2
Input load
Operating value setting range (OVER, UNDER)
Three-phase, three-wire Mode: 200, 220, 230 and 240 VAC
Three-phase, four-wire Mode: 115, 127, 133 and 138 VAC
Three-phase, three-wire Mode: 380, 400, 415 and 480 VAC
Three-phase, four-wire Mode: 220, 230, 240 and 277 VAC
K8AB-PM1: 25 VA max.
K8AB-PM2: 45 VA max.
Overvoltage
−30%
to 25% of rated input voltage
Undervoltage
−30%
to 25% of rated input voltage
Note:
The rated input voltage can be switched using the DIP switch.
100% operation at set value
5% of operating value (fixed)
Automatic reset
Overvoltage/undervoltage
Reversed phase/phase loss
0.1 to 30 s
0.1 s max.
1 s or 5 s (Switched using DIP switch.)
Power (PWR): Green, Relay output (RY): Yellow, OVER/UNDER: Red
Two SPDT relays (NC operation)
Rated load
Resistive load
6 A at 250 VAC (cosφ = 1)
6 A at 30 VDC (L/R = 0 ms)
Inductive load
1 A at 250 VAC (cosφ = 0.4)
1 A at 30 VDC (L/R = 7 ms)
Maximum contact voltage:
250 VAC
Maximum contact current:
6 A AC
Maximum switching capacity: 1,500 VA
Minimum load:
10 mA at 5 VDC
Mechanical life:
10,000,000 operations
Electrical life:
Make: 50,000 times, Break: 30,000 times
−20
to 60°C (with no condensation or icing)
−40
to 70°C (with no condensation or icing)
25% to 85% (with no condensation)
25% to 85% (with no condensation)
2,000 m max.
0.49 N·m
Recommended wire
Solid wire:
2.5 mm
2
Twisted wires: AWG16, AWG18
Note: 1.
Ferrules with insulating sleeves must be used with twisted wires.
2.
Two wires can be twisted together.
Recommended ferrules
Al 1,5-8BK (for AWG16) manufactured by Phoenix Contact
Al 1-8RD (for AWG18) manufactured by Phoenix Contact
Al 0,75-8GY (for AWG18) manufactured by Phoenix Contact
Munsell 5Y8/1
ABS resin (self-extinguishing resin) UL94-V0
Approx. 130 g
Mounted to DIN Track or via M4 screws (tightening torque: 1.2 N·m)
22.5 (W)
×
90 (H)
×
100 (D) mm
Operating value
Reset value
Reset method
Operating time
setting range (T)
Startup lock time (LOCK)
Indicators
Output relays
Output relay ratings
Ambient operating temperature
Storage temperature
Ambient operating humidity
Storage humidity
Altitude
Terminal screw tightening torque
Terminal wiring method
Case color
Case material
Weight
Mounting
Dimensions
2
K8AB-PM
■
Specifications
Input frequency range
Overload capacity
Setting error
Operating value
Operating time
Startup lock time
Repeat error
Operating value
Set value
±0.5
s
Operating value
±2%
Error calculation: Error = ((Maximum operating value
−
Minimum operating value (over 10 operations))/2)/
Average value
×
100%
Overvoltage: Operating value x 95%
±2%
Undervoltage: Operating value x 105%
±2%
Error calculation: Error = ((Maximum reset value
−
Minimum reset value (over 10 resets))/2)/Average value
×
100%
Operating time repeat error:
±50
ms
Overvoltage:
Measured when input suddenly changes from 70% to 120% of setting.
Undervoltage:
Measured when input suddenly changes from 120% to 70% of setting.
The input voltage, however, must be between 70% and 125% of rating.
Startup lock time repeat error:
±0.5
s
(The operating time when the operating time is set to the minimum value and the power supply suddenly
changes from 0% to 100%.)
Operating value
Drift based on measured value at standard temperature:
−20°C
to standard temperature:
±1,000
ppm/°C max.
Standard temperature to 60°C :
±1,000
ppm/°C max.
(Humidity: 25% to 80%)
Operating time
Fluctuation based on measured value at standard temperature:
−20°C
to standard temperature:
±10%
max.
Standard temperature to 60°C :
±10%
max.
(Humidity: 25% to 80%)
Operating value
Based on ambient humidity of 65%
25% to 80%:
±5%
max.
Operating time
Based on ambient room humidity
25% to 80%:
±10%
max.
At 45 to 65 Hz
Operating value
±5%
max.
Operating time
±10%
max.
Note:
The error in the operating value and operating time under standard conditions.
EN60255-5 and EN60255-6
Installation environment (Pollution Degree 2, Overvoltage Category III)
EN61326
UL508
20 MΩ min.
Between external terminals and case
Between input terminals and output 1 terminals
Between input terminals and output 2 terminals
Between output 1 terminals and output 2 terminals
2,000 VAC for one minute
Between external terminals and case
Between input terminals and output 1 terminals
Between input terminals and output 2 terminals
Between output 1 terminals and output 2 terminals
1,500 V power supply terminal common/normal mode
Square-wave noise of ±1
µs/100
ns pulse width with 1-ns rise time
Frequency 10 to 55 Hz, 0.35-mm single amplitude, acceleration 50 m/s
2
10 sweeps of 5 min each in X, Y, and Z directions
100 m/s
2
, 3 times each in 6 directions along three axes (up/down, left/right, forward/backward)
Terminal section: Finger protection
45 to 65 Hz
Continuous input: 115% of maximum input, 10 s max.: 125% of maximum input
Set value
±10%
of full scale
Reset value
Operating time
Startup lock time
Temperature influence
Humidity influence
Influence of input frequency
Applicable
standards
Conforming standards
EMC
Safety standards
Insulation resistance
Dielectric strength
Noise immunity
Vibration resistance
Shock resistance
Degree of protection
3
K8AB-PM
Connections
■
Wiring Diagram
Overvoltage/Undervoltage and Phase Sequence/Phase Loss Operation Diagram
Overvoltage
setting value
N L1 L2 L3
Hysteresis: Fixed at 5%
Hysteresis: Fixed at 5%
Flashing
L1
Input L2
L3
Undervoltage setting value
Lit
Flashing
Undervoltage alarm indicator
Overvoltage relay
Undervoltage relay
Lit
Voltage input
L1
L2
L3
N
Overvoltage alarm indicator
T
T: Operating time (0.1 to 30 s)
T
T1
T: Operating time (0.1 to 30 s)
14
Signal output
12
11
Overvoltage
T1: Power ON lock (1 s or 5 s)
Phase loss operation
L1
Phase sequence operation
L1
L3
L1
L3
L2
L1
L2
L3
24
Signal output
22
Undervoltage
Load
Phase loss,
reversed phase
21
Input L2
L2
L3
Flashing Flashing
Operation Indicators
Item
Overvoltage
ON
Undervolt-
age
Phase loss
ON
OFF
Display
ON
OFF
Off
ON
Contact operation
Off
ON
ON
OFF
Ry_LED
Over_LED Under_LED
Over_Ry
Under_Ry
Undervoltage alarm indicator
Undervoltage relay
Note: 1.
The K8AB-PM output relay is normally operative.
2.
The power ON lock prevents unnecessary alarms from being generated during the
instable period when the power is first turned on. There is no relay output during timer
operation.
3.
Phase loss is detected by L1, L2, and L3 voltage drops.
A phase loss will exist if any of the phases drops below 60% of the rated input.
4.
L1 and L2 function both as the power supply terminals and as input terminals. If the
voltage drops dramatically, then the Relay will not operate due to an undervoltage.
5.
Motor load phase loss cannot be detected during operation.
6.
Phase loss is detected based on voltage, so phase loss cannot be detected on the
load side.
OFF
ON
(See note
1.)
OFF
OFF
OFF
(See note
1.)
OFF
Reversed
phase
Correct
phase
ON
Flashing ON
(See note
2.)
OFF
ON
ON
OFF
ON
Note: 1.
While phase loss is detected, Over_Ry will also be OFF.
2.
The indicator will flash once per second after a phase loss
is detected and once per 0.5 second during the detection
time.
4
K8AB-PM
Nomenclature
■
Front
Terminal block
(See notes 1 and 2.)
Indicators
Item
Power indicator
(PWR: Green)
Relay status indicator
(RY: Yellow)
Alarm
Overvoltage:
indicator Red
Meaning
Lit when power is being supplied (see note).
Lit when relay is operating (normally lit).
Overvoltage knob
(OVER)
Power indicator
Relay status indicator
Alarm indicator
0.1
Undervoltage knob
(UNDER)
Operating time knob (T)
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:
•
Lit when there is an undervoltage or phase loss.
Red
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.
Terminal block
(See notes 1 and 2.)
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
Item
Overvoltage knob
(OVER)
Undervoltage knob
(UNDER)
Usage
Can be set between
−30%
and 25% of the rated
input.
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.
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.
For 2.5 mm
2
or
smaller solid wires
For ferrules with
insulating sleeves
8 mm max.
8 mm max.
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
5
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