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KE1

Smart Measurement and Monitor Units

KE1

First in the Industry! Unit structure that enables Power and Earth Leakage Monitoring with just one Unit. Use just one Unit to implement multi-circuit measurements.

about this Product Family

Ratings

Model KE1-
PGR1C-
FLK
(Power/
Earth
Leakage)
KE1-
PVS1C-
FLK
(Power/
Momentary
Voltage Sag)
KE1-
VSU1B-
FLK
(Momentary
Voltage
Sag)
KE1-
VAU1B-
FLK
(Voltage/
Current)
KE1-
CTD8E
(CT
Expansion)
KE1-
ZCT8E
(ZCT
Expansion)
Applicable phase wiring
method
Single-phase two-wire, single-phase three-wire, three-phase three-wire, and three-
phase four-wire
Power
supply
Rated power
supply voltage
100 to 240 VAC, 50/60 Hz ---
Allowable supply
voltage range
85% to 110% of rated power supply voltage ---
Power supply
fluctuation
frequency range
45 to 65 Hz ---
Power
consumption
Standalone: 10 VA max.,
Maximum connections:
14 VA max.
10 VA max.
Power
interruption
compensation
method
--- Backup for 1.2 seconds min.
with electric double-layer
capacitor for voltage
measurement only.
---
Input Rated input
voltage
100 to 480 VAC (single-phase, 2-wire): Line voltage
100/200 VAC (single-phase, 3-wire): Phase voltage/line
voltage
100 to 480 VAC (3-phase, 3-wire): Line voltage
58 to 277 VAC/100 to 480 VAC (3-phase, 4-wire):
Phase voltage/line voltage
---
Rated input
current for CT
5 A, 50 A, 100 A, 200 A,
400 A, or 600 A
Special CTs used.
--- 5 A, 50 A, 100 A, 200 A,
400 A, or 600 A
Special CTs used.
---
Rated input
current for ZCT
50 A, 100 A,
150 A, 200
A, 400 A,
600 A, or
1,000 A
--- 50 A, 100 A,
150 A, 200 A,
400 A, 600 A,
or 1,000 A
Rated input
power
With 5-A CT: 4 kW
With 50-A CT: 40 kW
With 100-A CT: 80 kW
With 200-A CT: 160 kW
With 400-A CT: 320 kW
With 600-A CT: 480 kW
--- With 5-A CT:
4 kW
With 50-A
CT: 40 kW
With 100-A
CT: 80 kW
With 200-A
CT: 160 kW
With 400-A
CT: 320 kW
With 600-A
CT: 80 kW
---
Rated input
frequency
50/60 Hz ---
Input frequency
fluctuation range
45 to 65 Hz ---
Input leakage
current
1,000 mA --- 1,000 mA
Allowable input
voltage
110% of rated input voltage (continuous) ---
Allowable input
current
120% of rated input current
(continuous)
--- 120% of rated current
(continuous)
---
Rated input load Voltage input: 0.5 VA max. (excluding power supply) ---
Current input: 0.5 VA max. (for each input) --- Current
input: 0.5 VA
max. (for
each input)
---
Clock Clock setting 2012 to 2099 (Adjusted for leap years during this period.) ---
Clock accuracy ±1.5 min./month (at 23°C) ---
Clock backup
period
Seven-day backup with an electric double-layer
capacitor (after being powered for at least 24 hours and
when the power is interrupted at 23°C)
---
Ambient operating
temperature
-10 to 55°C (with no condensation or icing)
Storage temperature -25 to 65°C (with no condensation or icing)
Ambient operating humidity 25% to 85%
Storage humidity 25% to 85%
Altitude 2,000 m max.
Installation environment Overvoltage category II, pollution degree 2, measurement category II
Compliant
standards
All KE1 Units EN 61010-2-030 (IEC 61010-2-030)
EN61326-1 Industrial electromagnetic environment
UL61010-1 (*)
UL61010-2-030 (*)

* Use a UL-compliant current transformer (CT) (KM20-CTF-[][][]AU) for application as a UL-certified component.

Characteristics

Model KE1-
PGR1C-
FLK
(Power/
Earth
Leakage)
KE1-
PVS1C-
FLK
(Power/
Momentary
Voltage Sag)
KE1-
VSU1B-
FLK
(Momentary
Voltage
Sag)
KE1-
VAU1B-
FLK
(Voltage/
Current)
KE1-
CTD8E
(CT
Expansion)
KE1-
ZCT8E
(ZCT
Expansion)
Accuracy
*1
Voltage ±1.0% FS ±1 digit
The accuracy of the voltage across the Vtr is ±2.0% FS
±1 digit under the same conditions.
---
Current ±1.0% FS ±1 digit
However, the accuracy is
±2.0% FS ±1 digit for the
phase-S current for a
three-phase, three-wire
circuit and the phase-N
current for a single-phase,
three-wire circuit under
the same conditions.
--- ±1.0% FS ±1 digit
However, the accuracy
is ±2.0% FS ±1 digit for
the phase-S current for
a three-phase, three-
wire circuit and the
phase-N current for a
single-phase, three-wire
circuit under the same
conditions.
---
Leakage current 30 to 200
mA: ±5%
rdg ±1 digit
200 to
1,000 mA:
±1%FS
±1 digit
--- 30 to 200
mA: ±5%
rdg ±1 digit
200 to
1,000 mA:
±1%FS ±1
digit
Power (active
power and
reactive power)
Active power and reactive
power ±2.0% FS ±1 digit
(power factor = 1)
--- Active
power and
reactive
power
±2.0% FS
±1 digit
(Power
factor = 1)
---
Frequency ±0.3 Hz ±1 digit ---
Power factor *2 ±5.0% FS (power factor =
0.5 to 1 to 0.5)
--- ±5.0% FS
(Power
factor = 0.5
to 1 to 0.5)
---
Temperature ---
Temperature influence *1 ±1.0% FS (percentage of the measurement value at an ambient temperature of 23°C,
rated input, rated frequency, and a power factor of 1 in the operating temperature
range)
Frequency influence *1 ±1.0% FS (percentage of the measurement value at an ambient temperature of 23°C,
rated input, rated frequency, and a power factor of 1 in the rated frequency ±5 Hz
range)
Influence of harmonics *1 ±0.5% FS (at ambient temperature of 23°C, error for superimposed 2nd, 3rd, 5th,
7th, 9th, 11th, and 13th harmonics for a content percentage of 30% for current and
5% for voltage of the basic wave)
Low-cut current set value 0.1% to 19.9% of rated input
in 0.1% increments
--- 0.1% to 19.9% of rated
input in 0.1% increments
---
Low-cut leakage current
set value
Variable in 0.1-mA
increments between 0.1
and 30.0 mA
--- Variable in
0.1-mA
increments
between
0.1 and
30.0 mA
Sampling cycle 100 ms for measurement voltage at 50 Hz and 83.3 ms for measurement voltage at
60 Hz
Insulation resistance Insulation resistance: 20 MΩ (at 500 VDC)
Dielectric strength All models: Locations to which 2,000 V was applied for one minute: Between all
terminals and case
KE1-PGR1C-FLK:
Between the power supply terminals and RS-485/transistor/relay outputs
Between the power supply terminals and current/voltage/earth leakage inputs
Between current/voltage/earth leakage inputs and RS-485/relay/transistor outputs
KE1-PVS1C-FLK:
Between the power supply terminals and RS-485/transistor/relay outputs
Between the power supply terminals and current/voltage input
Between current/voltage inputs and RS-485/relay/transistor outputs
KE1-VSU1B-FLK:
Between power supply terminals and RS-485/relay outputs
Between the power supply terminals and voltage inputs
Between voltage inputs and RS-485/relay outputs
KE1-VAU1B-FLK:
Between power supply terminals and RS-485/relay outputs
Between the power supply terminals and current/voltage input
Between current/voltage inputs and RS-485/relay outputs
KE1-CTD8E:
Between current inputs and relay outputs
KE1-ZCT8E:
Between earth leakage inputs and relay outputs
Vibration resistance Single-amplitude: 0.35 mm, Acceleration: 50 m/s2
Vibration: 10 to 55 Hz, 10 sweeps of 5 minutes each along 3 axes
Shock resistance 150 m/s2, 3 times each in 6 directions (up/down, left/right, forward/backward)
Weight Approx. 230 g
Memory backup No. of writes to non-volatile memory: 1,000,000 times
Event
inputs
Number of inputs ---
No-voltage
inputs
---
Voltage input ---
Tempera-
ture in-
puts
Thermistor
inputs
---
Applicable
thermistor
---
Combinations Capable of supporting 7
event inputs and 1
temperature input when
connected with the
KM1-EMU8A-FLK.
---
Transis-
tor out-
puts
Number of
outputs
One open-collector output
(OUT2)
---
Output capacity 30 VDC, 30 mA ---
ON residual
voltage
1.2 V max. ---
OFF leakage
current
100 μA max. ---
Total power
consumption
pulse output
Outputs one pulse when
the power consumption
reaches the set pulse
output unit (1, 10, 100,
1k, 2k, 5k, 10k, 20k, 50k,
100k W/h).
---
Alarm output Outputs an alarm based on
the set alarm output
threshold.
---
Alarm recovery
method
Automatic recovery only ---
Relay
outputs
Number of
outputs
One NO
contact
output
(OUT1)
--- One NO
contact
output (OUT1)
Two NO
contact
outputs
(OUT1
and OUT2)
One NO contact output
(OUT1)
Rated load Resistance
load, 250
VAC, 3 A;
30 VDC, 3 A
Inductive
load (cosφ
= 0.4, L/R =
7 ms): 250
VAC, 1 A; 30
VDC, 1 A
--- Resistance load, 250 VAC,
3 A; 30 VDC, 3 A
Inductive load (cosφ = 0.4,
L/R = 7 ms): 250 VAC, 1 A;
30 VDC, 1 A
Resistance load, 125 VAC,
3 A; 30 VDC, 3 A
Mechanical life
expectancy
10,000,000
operations
--- 10,000,000 operations 5,000,000 operations min.
Electrical life
expectancy
50,000
operations
min. (rated
load
switching
frequency:
1,800
times/h)
--- 50,000 operations min.
(rated load switching
frequency: 1,800 times/h)
200,000 times min. (rated
load switching frequency:
1,800 times/h)
Failure rate P
level
5 VDC, 10
mA (at a
switching
frequency
of 120
times/min)
--- 5 VDC, 10 mA (at a switching frequency of 120 times/
min)
Alarm output Turns
output ON
or OFF
based on
the alarm
set value.
--- Turns output ON or OFF based on the alarm set value.
Recovery
method
Automatic
recovery
only
--- Automatic recovery only
Semicon
ductor
relay
outputs
Number of
outputs
--- One MOS
FET output
(OUT1)
One MOS
FET output
(OUT2)
---
Maximum load
voltage
--- Peak: 24 VAC/DC ---
Continuous load
current
--- Peak: 80 mA AC/DC ---
ON resistance --- 15 Ω max. ---
Open-circuit
leakage current
--- 1 nA max. ---
Alarm output --- Turns output ON or OFF
based on the alarm set value.
---
Recovery
method
--- Automatic recovery only ---
Commu-
nications
Protocols Communications protocol setting OFF: CompoWay/F, ON: Modbus
Unit number
setting
CompoWay/F: 0 to 99, Modbus:1 to 99
When a switch operation is performed to set the protocol to Modbus when the node
number is set to 0, the node number is automatically changed to 1.
Communication
items
Refer to the KM1/KE1 Communications Manual.
RS-485 Sync method Start-stop ---
Baud rate 9,600 bps, 19,200 bps, or 38,400 bps ---
Transmission
code
CompoWay/F: ASCII, Modbus: Binary ---
Data length CompoWay/F: 7 bits, 8 bits; Modbus: 8 bits ---
Stop bits CompoWay/F: 1 bits or 2 bits
Modbus: 1 bit with priority, 2 bits without priority
---
Parity Even, odd, or none ---
Maximum
transmission
distance
500 m ---
Maximum number
of nodes
CompoWay/F: 31, Modbus: 99 ---
USB USB 1.1 compliant
Memory retention for power
interruptions
Parameter
data, alarm
history,
logged
data, and
backup
data
Parameter
data, alarm
history,
logged data,
backup
data, and
momentary
voltage sag
history
Parameter
data, alarm
history,
logged
data, and
momentary
voltage sag
history
Parameter
data,
alarm
history,
and logged
data
Parameter
data, alarm
history, and
backup data
Parameter
data and
alarm
history
Number of connect
connector insertions/
removals
25 times

*1. Based on JISC1111, without special CT error, at ambient temperature of 23°C, rated input, and rated frequency.
       Applicable to 2nd, 3rd, 5th, 7th, 9th, 11th, and 13th harmonics.
*2. Power factor formula: Power factor = Active power/Apparent power
                                                                         Apparent power = √(Active power)2 + (Reactive power)2

Protection

Model KE1-
PGR1C-
FLK
(Power/
Earth
Leakage)
KE1-
PVS1C-
FLK
(Power/
Momentary
Voltage Sag)
KE1-
VSU1B-
FLK
(Momentary
Voltage
Sag)
KE1-
VAU1B-
FLK
(Voltage/
Current)
KE1-
CTD8E
(CT
Expansion)
KE1-
ZCT8E
(ZCT
Expansion)
Voltage
monitor-
ing
Alarm threshold
(overvoltage/
undervoltage)
0.0 to 12,100.0 V ---
Operation
characteristic
±1.0% FS ±1 digit
The accuracy of the voltage across the Vtr is ±2.0%
FS ±1 digit under the same conditions.
---
Alarm ON delay
(overvoltage/
undervoltage)
0.1 to 10.0 s ---
Operating time
characteristic
±0.2 s ---
Alarm hysteresis
(overvoltage/
undervoltage)
0.0 to 2,200.0 V ---
Resetting time 0.5 s (Cannot be changed.) ---
Resetting time
characteristic
±0.2 s ---
Current
monitor-
ing
Alarm threshold
(overcurrent/
undercurrent)
0.0 to 6,000.0 A --- 0.0 to 6,000.0 A ---
Operation
characteristic
±1.0% FS ±1 digit
However, the accuracy is
±2.0% FS ±1 digit for the
phase-S current for a
three-phase, three-wire
circuit and the phase-N
current for a single-
phase, three-wire circuit
under the same
conditions.
--- ±1.0% FS ±1 digit
However, the accuracy
is ±2.0% FS ±1 digit for
the phase-S current for
a three-phase, three-
wire circuit and the
phase-N current for a
single-phase, three-
wire circuit under the
same conditions.
---
Alarm ON delay
(overcurrent/
undercurrent)
0.1 to 10.0 s --- 0.1 to 10.0 s ---
Operation
characteristic
±0.2 s --- ±0.2 s ---
Alarm hysteresis
(overcurrent/
undercurrent)
0.0 to 1,000.0 A --- 0.0 to 1,000.0 A ---
Resetting time 0.5 s (Cannot be changed.) --- 0.5 s (Cannot be
changed.)
---
Resetting time
characteristic
±0.2 s --- ±0.2 s ---
Active
power
monitor-
ing
Alarm thresholds
(upper limit/lower
limit)
-120,000,000 to
120,000,000 W
--- -120,000,000
to
120,000,000
W
---
Operation
characteristic
±2.0% FS ±1 digit --- ±2.0% FS
±1 digit
---
Alarm ON delay
(upper limit/lower
limit)
0.5 to 10.0 s --- 0.5 to 10.0 s ---
Operation
characteristic
±0.2 s --- ±0.2 s ---
Alarm hysteresis
(upper limit/lower
limit)
0 to 24,000,000 W --- 0 to
24,000,000 W
---
Resetting time 0.5 s (Cannot be changed.) --- 0.5 s (Cannot
be changed.)
---
Resetting time
characteristic
±0.2 s --- ±0.2 s ---
Reactive
power
monitor-
ing
Alarm thresholds
(upper limit/lower
limit)
-120,000,000 to
120,000,000 W
--- -120,000,000
to
120,000,000
W
---
Operation
characteristic
±2.0% FS ±1 digit --- ±2.0% FS
±1 digit
---
Alarm ON delay
(upper limit/lower
limit)
0.5 to 10.0 s --- 0.5 to 10.0 s ---
Operation
characteristic
±0.2 s --- ±0.2 s ---
Alarm hysteresis
(upper limit/lower
limit)
0 to 24,000,000 W --- 0 to
24,000,000 W
---
Resetting time 0.5 s (Cannot be changed.) --- 0.5 s (Cannot
be changed.)
---
Resetting time
characteristic
±0.2 s --- ±0.2 s ---
Power
factor
monitor-
ing
Alarm threshold -1.00 to 1.00 --- -1.00 to 1.00 ---
Operation
characteristic
±5.0% FS (Power factor =
0.5 to 1 to 0.5)
--- ±5.0% FS
(Power factor
= 0.5 to 1 to
0.5)
---
Alarm ON delay 0.5 to 10.0 s --- 0.5 to 10.0 s ---
Operation
characteristic
±0.2 s --- ±0.2 s ---
Alarm hysteresis 0.00 to 1.00 --- 0.00 to 1.00 ---
Earth
leakage
monitor-
ing
Earth leakage
comparison value
30 to
1,000 mA
--- 30 to 1,000 mA
Operation
characteristic
±5% rdg
±1 digit for
30 to 200
mA, ±1%
FS ±1 digit
for 200 to
1,000 mA
--- ±5% rdg ±1 digit for 30 to
200 mA, ±1% FS ±1 digit
for 200 to 1,000 mA
Earth leakage
operating time
0.1 to
20.0 s
--- 0.1 to 20.0 s
Operation
characteristic
±0.2 s --- ±0.2 s
Resetting
condition
95% of
operating
value
--- 95% of operating value
Resetting time 0.5 s
(Cannot be
changed.)
--- 0.5 s (Cannot be changed.)
Momen-
tary volt-
age sag
monitor-
ing
Momentary voltage
sag detection
voltage
--- 0 to 480.0 V ---
Allowable error in
detection voltage
--- ±2.5% FS ±1 digit ---
Continuation time
for momentary
voltage sag
--- Without backup: 0.02 to
0.2 s
---
With backup: 0.02 to 1.00 s
Relay output
operating time
accuracy
--- ±5 ms ---
Open
phase
monitor-
ing
Open phase
detection
condition
(Largest error between any phase voltage and
average voltage) ÷ Average voltage × 100 . 85%
---
Operation
characteristic
±1.0% FS ±1 digit
The accuracy of the voltage across the Vtr is ±2.0%
FS ±1 digit under the same conditions.
---
Operating time 0.1 s ---
Operation
characteristic
±0.2 s ---
Resetting
condition
Non-balance ratio: Less than 13% ---
Resetting time 0.5 s (Cannot be changed.) ---
Resetting time
characteristic
±0.2 s ---
Re-
versed
phase
monitor-
ing
Reversed phase
detection
condition
Change in voltage phase sequence lasts for 0.1
second or longer.
---
Operating time 0.1 s ---
Operation
characteristic
±0.2 s ---
Resetting
condition
Phase offset within ±45° ---
Resetting time 0.5 s (Cannot be changed.) ---
Resetting time
characteristic
±0.2 s ---

Special CTs

Current Transformers (CTs)

Structure Split-type Through-
hole
Model KM20-
CTF-5A
KM20-
CTF-50A
KM20-
CTF-100A
KM20-
CTF-200A
KM20-
CTF-400A
KM20-
CTF-600A
KM20-
CTB-
5A/50A
Item KM20-
CTF-5AU
KM20-
CTF-50AU
KM20-
CTF-
100AU
KM20-
CTF-
200AU
KM20-
CTF-
400AU
KM20-
CTF-
600AU
Rated primary current 5 A 50 A 100 A 200 A 400 A 600 A 5A/50 A
Secondary winding 3,000 turns 6,000 turns 9,000 turns 3,000 turns
Applicable frequency 10 Hz to 5 kHz
Insulation resistance Between output terminals and case: 50 MΩ min. (at 500 VDC)
Dielectric strength Between output terminals and case: 2,000 VAC for 1 minute
Protective element 7.5-V clamp element
Allowable number of
connections/
disconnections
100 times
Mountable wire
diameter
7.4 mm
max.
8.5 mm
max.
11 mm max. 24 mm max. 35.5 mm max. 8.4 mm
max.
Operating
temperature and
humidity ranges
-20 to 60°C, 85% max. (with no condensation)
Storage temperature
and humidity ranges
-30 to 65°C, 85% max. (with no condensation)

Note: Operate the Special CTs at a low voltage of 600 V or less.

General Specifications

Item Specification
Rated power supply voltage 100 to 240 VAC, 50/60 Hz
Allowable voltage range 85% to 110% of rated power supply voltage
Power consumption (at maximum load) 6 VA max.
Current consumption (DeviceNet
power supply)
45 mA max. (24 VDC)
Vibration resistance 10 to 55 Hz, 10 m/s2 for 2 hours along 3 axes
Shock resistance Single-amplitude: 0.35 mm, Acceleration: 50 m/s2 Vibration: 10 to 55 Hz,
10 sweeps of 5 minutes each along 3 axes
Dielectric strength 2,000 V for 1 min between all terminals and case, and between power
supply terminals and temperature input/RS-485 output/USB output/
DeviceNet output/transistor output
Insulation resistance 20 MΩ min. (at 500 VDC)
Ambient operating temperature -10 to 55°C (with no condensation or icing)
Ambient operating humidity 25% to 85%
Ambient storage temperature -25 to 65°C (with no condensation or icing)
Dimensions 45 × 90 × 110 mm (W×H×D) (excluding protrusions)
Memory backup EEPROM (non-volatile memory), No. of writes: 1,000,000
Weight Approx. 170 g

Current Transformer (CT) Cable

Model KM20-CTF-CB3
Cable length 3 m

Note: Use only the CT Cable specified by OMRON.

Special ZCTs

Zero-phase Current Transformers (Compatible ZCTs)

Structure Indoor, through-hole
Model OTG-L21 OTG-L30 OTG-L42 OTG-L68 OTG-L82 OTG-L156
Rated current 50 A 100 A 200 A 400 A 600 A 1,000 A
Through-hole diameter 21 30 42 68 82 156
Rated load 600 VAC max, 50/60 Hz, Single-phase/three-phase
Output terminal
polarity
Polarity (Connect CT output terminal k to terminal 5 or 7 and terminal I to terminal 6 or 8.)
Secondary connection Terminals (with test terminals kt and lt)
Insulation resistance 100 MΩ min. (between charged metal parts and ground)
Dielectric strength 2,200 VAC at 50/60 Hz for 1min (between charged metal parts and ground)
Ambient operating
temperature
-10 to 60°C (with no icing)
Ambient operating
humidity
45% to 85%
Weight Approx. 90 g Approx. 130 g Approx. 230 g Approx. 480 g Approx. 700 g Approx. 6.6 kg

Structure Indoor, split-type Outdoor,
through-hole
Outdoor,
split-type
Model OTG-CN52 OTG-CN77 OTGCN112 OTG-LA30W OTG-CN36W
Rated current 200 A 400 A 600 A 100 A 150 A
Through-hole diameter 52 77 112 30 36
Rated load 600 VAC max, 50/60 Hz, Single-phase/three-phase
Output terminal polarity Polarity (Connect CT output terminal k to terminal 5 or 7 and terminal I to terminal 6 or 8.)
Secondary connection Terminals (with test terminals kt and lt) Lead wire I = 500 Lead wire I = 450
Insulation resistance 100 MΩ min. (between charged metal parts and ground)
Dielectric strength 2,200 VAC at 50/60 Hz for 1min (between charged metal parts and ground)
Ambient operating temperature -10 to 60°C (with no icing)
Ambient operating humidity 45% to 85%
Weight Approx. 1.3 kg Approx. 2.5 kg Approx. 3.5 kg Approx. 140 g Approx. 650 g

Note: Operate the Special ZCTs at a low voltage of 600 V or less.

Current Transformer for Ground Wires

Structure Indoor, split-type
Model K6ER-CN22
Rated current 2 A
Through-hole diameter 22
Rated load 600 VAC max, 50/60 Hz, Single-phase/three-phase
Output terminal polarity Polarity (Connect CT output terminal k to terminal 5 or 7 and terminal I to terminal
6 or 8.)
Secondary connection Lead wire I: 150, Enclosed cable: 3,000 mm
Insulation resistance 100 MΩ min. (between core and output lead wire)
Dielectric strength 1,000 VAC at 50/60 Hz for 1 min (between core and output lead wire)
Ambient operating temperature -10 to 60°C (with no icing)
Ambient operating humidity 80% max.
Weight Approx. 65 g