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MELSEC-Q Energy measuring modules

(12/31/2016)

Energy Monitoring Modules, Single-Circuit

Energy measuring modules add energy management capability to a Q Series system. Mount the module on a Q base unit to measure a variety of energy usage, such as current, voltage, power, frequency, etc. for a single circuit.

Model Number

QE81WH

QE81WH4W

Stocked Item

S

-

Certification

UL • cUL • CE

Phase Wire System

1-phase, 2-wire / 1-phase, 3-wire / 3-phase, 3-wire

3-phase, 4-wire

Instrument
Ratings

Voltage Circuit

1-Phase, 2-Wire; 3-Phase, 3-Wire (*1)

110VAC, 220VAC common use

-

1-Phase, 3-Wire

110VAC (between wires 1-2, between wires 2-3),
220VAC (between wires 1-3)

-

3-Phase, 4-Wire

-

63.5/110 ~ 277/480VAC (select from 63.5/110, 100/173, 105/182, 110/190, 115/199, 120/208, 127/220, 200/346, 220/380, 230/400, 240/415, 242/420, 250/430, 254/440, 265/460 and 277/480V [all values indicate primary-side voltage of voltage converter](*3)

QE8WH4VT is needed for a 4-wire WYE system.

Current Circuit

AC50A, 100A, 250A, 400A, 600A (Dedicated split-type current sensor is used. In all cases, the current sensor’s primary current is indicated.)

50, 100, 250, 400, 600AAC (use of special split current sensor; all values indicate current values for primary side of current sensor)

5AAC (use of special 5A current sensor (EMU2-CT5-4W); 5A current sensor can be used in combination with current transformer in a two-level configuration, and primary-side current value can be set to a maximum of 6,000A)

AC5A (Dedicated split-type current sensor is used. The 5A current sensor is used in combination with a current transformer (CT) in a two-step configuration. In this case, the maximum primary current setting is 6000A.)

Frequency

50-60Hz (automatic frequency selection)

Tolerance

Main Unit

Measurement Items

Main Unit Permissible Tolerance

Current,
Demand Current

±1.0% (relative to 100% rating) (*2)

Voltage

±1.0% (relative to 100% rating)

Energy,
Demand Energy

±1.0% (relative to 100% rating) (*2)

Reactive Power

±2.5% (5-120% of rating, power factor = 0)

Frequency

±1.0% (45-65Hz range)

Power Level

±2.0% (5-120% of rating, power factor = 1)

Power Factor

±3.0% (relative to electrical angle of 90°)

Measurement Items

Main Unit Permissible Tolerance

Current,
Demand Current

±1.0% (relative to 100% of rated value)

Voltage

±1.0% (relative to 100% of rated value)

Energy,
Demand Energy

±1.0% (relative to 100% of rated value)

Reactive Power

±1.0% (relative to 100% of rated value)

Apparent Power

±1.0% (relative to 100% of rated value)

Frequency

±1.0% (in 45 to 65Hz range)

Power Factor

±3.0% (relative to electrical angle of 90°)

Energy Use

± 2.0% (in 5-100% range of rated value, power factor=1)

Reactive
Energy Use

±2.5% (in 10-100% range of rated value, power factor=0)

Number of Measurement Circuits

1

Data Refresh Period

250ms (fixed) Note: Constant cumulative count of power level and reactive power level (also includes short-cycle load changes)

250ms

Response Time

Backup to non-volatile memory
(Saved items: Setting values, max./min. values and their occurrence times, power level (regenerative, consumption), reactive power level, period power level)

2s or less

Measurable Items

Current, current demand, voltage, power, demand power, power factor, frequency, electric energy, reactive energy, periodic energy

Number of Occupied Points

16 points (I/O assignment: intelligent 16 points)

Internal Current Consumption (A)

0.17

Notes:

  1. The module can be connected directly to 100 to 220 V circuits. When the voltage exceeds 220 V AC, an external voltage transformer (VT) is required. (It is possible to arbitrarily set the primary voltage of VT to up to 6,600 V and the secondary voltage to up to 220 V.)
  2. “Demand” is the moving average over the specified time period.
  3. QE81WH4W is applicable to the standards when combined with voltage converter (QE8WH4VT)

Energy Measuring Modules, Multi-Circuit

Energy measuring modules can be slotted directly into a Q Series rack to enable easy measurement of various energy data. These modules are multi-circuit models.

The three-phase/three-wire module (QE84WH) can measure up to 4 circuits, and the three-phase/four-wire module (QE83WH4W) can measure up to 3 circuits. These models provide energy management in a smaller space and at a lower cost than the single-circuit models (QE81WH and QE81WH4W).

When used to measure only the current*, the module can measure up to 8 circuits at 100ms intervals. It requires a small space and is suitable for current value management linked with production equipment.

Key Features:

  • Saves more space
  • Upper and lower limits can be monitored
  • Measurement on up to 8 circuits
  • Data updating cycle of 100 ms

*Note: In the current measurement mode, items other than current cannot be measured.

Model Number

QE84WH

QE83WH4W

Stocked Item

-

-

Certification

UL • cUL • CE

Phase/Wire

1-phase, 2-wire / 1-phase, 3-wire / 3-phase, 3-wire shared

3-phase, 4-wire

Instrument Ratings

Voltage

Circuit

1-Phase, Two-Wire; 3-Phase, 3-Wire (*1)

100V~220VAC (If the voltage exceeds 220 VAC, an external voltage transformer is required.)

-

1-Phase, 3-Wire

110VAC (between wires 1 and 2 and between wires 2 and 3), 220VAC (between wires 1 and 3)

-

3-Phase, 4-Wire (*2) (*3)

-

63.5/110~277/480VAC (When the voltage exceeds 277/480 VAC, a voltage transformer is required. The primary voltage values of the voltage transducer (QE8WH4VT) are shown. QE8WH4VT is required for a 4-wire WYE system.

Current Circuit (*4)

50, 100, 250, 400, 600AAC (use of special split current sensor; all values indicate current values for primary side of current sensor); 5AAC (use of special 5A current sensor; 5A current sensor can be used in combination with current transformer in a two-level configuration, and primary-side current value can be set to a maximum of 6,000A)

Frequency

50 to 60Hz (frequency determined automatically)

Main Unit Tolerances (Excluding Current Sensor)

Normal Operation Mode

Current, demand current: ± 1.0% (relative to 100% of rated value) (*5)

Voltage: ± 1.0% (relative to 100% of rated value)

Energy, demand energy: ± 1.0% (relative to 100% of rated value) (*5)

Reactive power: ± 1.0% (relative to 100% of rated value)

-

Apparent power: ± 1.0% (relative to 100% of rated value)

Frequency: ± 1.0% (in 45 to 65Hz range)

Power factor: ± 3.0% (relative to electrical angle of 90°)

Energy use: ± 2.0% (in 5 to 100% range of rated value, power factor=1)

Reactive energy use: ± 2.5% (in 10 to 100% range of rated value, power factor=0)

Current Measurement Mode

Current, demand current (*5): ± 1.0% (relative to 100% of rated value)

Number of Measurement

Circuits

Normal Operation Mode

4 circuits in a same voltage system (4 channels)

3 circuits in a same voltage system (3 channels)

Current Measurement Mode

8 circuits (8 channels)

Data Update Cycle

Normal Operation Mode

500ms (*6)

Current Measurement Mode

100ms

Response Time

2s or less

Power Interruption Backup

Backup in non-volatile memory (stored items: setting values, max./min. values and time and date they occurred, energy use (regenerative, consumption), reactive energy use, time-based energy use)

Number of Required Slots

1

Number of Input/Output Points

32 (I/O allocation: Intelligent, 32 points)

DC Consumption Current

0.46A

0.39A

Applicable Wires

Voltage Input Terminal

Solid Wire

AWG24-AWG16

Stranded Wire

AWG20-AWG16

Current Input Terminal

Stranded Wire

AWG20-AWG18 Applicable crimp-style terminal: R1.25-3 (crimp-style terminal with sleeve is not allowed)

Weight (kg)

0.19

0.19

Notes:
1. The module can be connected directly to 100 to 220 V circuits. When the voltage exceeds 220 V AC, an external voltage transformer (VT) is required. (It is possible to arbitrarily set the primary voltage of VT to up to 6,600 V and the secondary voltage to up to 220 V.)
2. For a 277/480V WYE system” after “For Voltage input, a voltage converter (QE8WH4VT) is required. When the primary voltage of the voltage transducer exceeds 277/480 V AC, an external voltage transformer (VT) is required. (It is possible to arbitrarily set the primary voltage of VT to up to 6,600 V as phase voltage.)
3. The ratio error of the voltage converter is ±1.0% (of the rated primary voltage).
4. The ratio error of the current sensor is ± 1% (5 to 100% of the rating).
5. The demand values are moving average deviations within the specified time limit.
6. The energy use and reactive energy use are constantly measured. Load variation in a short cycle of 500 ms or less is followed.

Insulation Monitoring Module

Constant measurement of leakage current (I0 or I0r) can prevent sudden trouble and reduce production loss due to equipment stoppage. Insulation monitoring pinpoints the problematic equipment, making it possible to recognize deteriorated insulation location early on.

Model Number

QE82LG

Stocked Item

-

Certification

UL • cUL • CE

Phase Wire System

1-phase, 2-wire / 1-phase, 3-wire and 3-phase, 3-wire systems common use

Instrument
Rating

Voltage Circuit (*1, *2)

1-Phase, 2-Wire,
3-Phase, 3-Wire

110VAC, 220VAC common use

1-Phase, 3-Wire

110VAC (between wires 1-2, between wires 2-3), 220VAC (between wires 1-3)

Current Circuit

AC50A, 100A, 250A, 400A, 600A (Dedicated split-type current sensor is used and the current sensor’s primary current is always indicated)

AC5A (Dedicated split-type current sensor is used. The 5A current sensor is used in combination with a current transformer (CT) in a
two-step configuration. In this case, the maximum primary current setting is 6000A).

Frequency

50-60Hz (automatic frequency selection)

Tolerance

Main Unit

Leakage current ±2.5% (10% to 100% of rating)
Resistive-component leakage current ±2.5mA (≤10% of rating)
(The resistive-component leakage current does not include electrostatic capacity)

Number of Measurement Circuits

2 circuits (*3)

Data Refresh Period

Leakage current: 2 sec or less; Resistive-component leakage current: 10 sec or less

Response Time

Leakage current: 4 sec or less; Resistive-component leakage current: 30 sec or less

Backup to non-volatile memory (Saved items: Setting values, max. value and its occurrence date/time, alarm occurrence times)

Measuring Items

Leakage Current

Current value, max. value, occurrence date/time of max. value, number of first stage alarm occurrences,
number of second stage alarm occurrences

Resistive-Component Leakage Current

Current value, max. value, occurrence date/time of max. value, number of first stage alarm occurrences,
number of second stage alarm occurrences

Number of Occupied Points

16 points (I/O assignment: intelligent 16 points)

Internal Current Consumption (A)

0.17

Weight (kg)

0.10

Notes:

  1. The module can be connected directly to 110V and 220V. To connect to 440V, an external voltage transformer (VT) is necessary. Leakage current (I0, I0r) cannot be measured without voltage input.
  2. I0r can be measured on a 1-phase, 3-wire or 3-phase, 3-wire delta circuit. On special grounded circuits, such as 3-phase, 3-wire star circuits, high-resistance grounded circuits and capacitor grounded circuits, only I0 can be measured.*
  3. Leakage current (I0 and I0r) of CH1 and CH2 can be measured only on circuits when the voltage input was on the same system.

Voltage Converter
Use only with QE81WH4W or QE83WH4W module when metering a 277V/480V 4-wire WYE system.

Model Number

QE8WH4VT

Stocked Item

-

Certification

UL • cUL • CE

Phase Wire System

3-phase, 4-wire

Input Voltage Range

63.5/110 to 277/480VAC (The product does not operate on the voltage below 55/95VAC)

Frequency

50 Hz/60 Hz

Voltage Output Tolerance

±1.0% (against the rated primary voltage)

Measurement Category

CATIII

Pollution Degree

II

Maximum Number of Connections

5 units

Operating Condition

Operating Temperature

0ºC to +55ºC (Average daily temperature 35ºC or below)

Operating Humidity

5% to 95% RH (without condensation)

Storage Temperature

-25ºC to +75ºC

Altitude

2000 m or lower

Commercial Frequency Withstand Voltage

Between voltage input terminals (P1, P2, P3, P0) and FG terminal: 2210VAC for 3 seconds; Between voltage input terminals
(P1, P2, P3, P0) and secondary output terminals (PA, PB, PC, PD) (except for SLD terminal) 2210VAC for 3 seconds

Insulation Resistance

10 MΩ or more (500VDC) at the same locations as above

Consumption VA

P1-P0: 2VA, P2-P0: 0.3VA, P3-P0: 0.3VA (when inputting 277/480VAC)

Current Consumption mA

30

Installation Location

Inside the control panel

Secondary Wire Length (m)

5

Installation Method

Installation on IEC rails, installation with screws

Product Life Expectancy

10 years (used under the operating conditions above)

Weight (kg)

0.3


Current Input Module
Predictive maintenance of devices by detecting the current in real-time. Changes in the alternating current signal are detected allowing the device state to be checked at real-time. The device can be serviced and troubleshooting performed by detecting the peak current. Take a motor for example. The load applied on the motor because of gear wear and damage changes and causes the load current to suddenly fluctuate.

Model Number

Q68CT

Stocked Item

-

Number of Input Points

8 points (8 channels)

Operation Method

Effective value operation

Input Range

0 to 5A AC, 0 to 50A AC, 0 to 100A AC, 0 to 200A AC, 0 to 400A AC, 0 to 600A AC

Digital Output

Converted Current Value

0 to 12000

Scaling Value

-32768 to 32767

Input Frequency

50/60Hz

Excessive Input

200% for 1 minute, 150% for continuous time

I/O Characteristics

Input Range

Digital Output Value

Maximum Resolution

0 to 5A AC

0 to 10000

0.5mA

0 to 50A AC

5mA

0 to 100A AC

10mA

0 to 200A AC

20mA

0 to 400A AC

40mA

0 to 600A AC

60mA

Accuracy

Ambient Temperature
25 ± 5°C

Within ±0.5% (±50 digits)

Ambient Temperature
0 to 55°C

Within ±1.0% (±100 digits)

Sampling Cycle

10ms/8CH, 20ms/8CH, 50ms/8CH, 100ms/8CH

Response Time

0.4s or less

Number of Access to Non-Volatile Memory

Up to 10¹² times

Isolation Method

Between input terminals and the programmable controller power supply: Transformer; Between input channels: No isolation

Dielectric Withstand Voltage

Between I/O terminals and the programmable controller power supply: 1500 VAC rms for 1 minute

Insulation Resistance

Between I/O terminals and the programmable controller power supply: 500V DC 10MΩ or higher

Number of Occupied I/O Points

16 points (I/O assignment: 16 points for intelligent)

External Connection System

18-point terminal block

Applicable Wire Size

0.3 to 0.75mm²

Applicable Solderless Terminal

R1.25-3 (Do not use a solderless terminal with an insulation sleeve)

Internal Current Consumption (5 VDC)

0.35A

Weight (kg)

0.19

EMU-CT Model Split Current Sensor
EMU-CTs are used with QE81WH, QE81WH4W, QE83WH4W, QE84WH, Q68CT and EMU4 products.

Model Number (*1)

EMU-CT50

EMU-CT100

EMU-CT250

EMU-CT400

EMU-CT600

Stocked Item

S

S

-

-

-

Certification

CE

Rated Primary Current

50A AC

100A AC

250A AC

400A AC

600A AC

Rated Secondary Current

16.66mA

33.33mA

66.66mA

66.66mA

66.66mA

Rated Burden

0.1VA

Maximum Voltage
(Voltage to Ground/Line Voltage)

266V/460VAC (*1)

Ratio Error

±1% (5% to 100% of rating, RL≤10Ω)

Phase Displacement

±0.9 c rad (5% to 100% of rating, RL≤10Ω)

Measurement (Installation) Category

III

Pollution Degree

II

Working Temperature Range

−5°C to +55°C (daily mean temperature: 35°C or less)

Working Humidity Range

5% to 95%RH (no condensation)

Weight (kg)

0.1

0.7

Note:
1. EMU-CTs can also be used for a 480V systems.

EMU2-CT Model 5A Current Sensor
Typically used when using existing conventional CTs. Monitors the secondary side of the CT.

Model Number

EMU2-CT5

EMU2-CT5-4W

Stocked Item

S

S

Certification

CE

Phase Wire System

1-phase, 2-wire / 1-phase, 3-wire / 3-phase 3-wire

3-phase, 4-wire

Rated Primary Current

5A AC

Rated Secondary Current

1.66mA

Rated Burden

0.1VA

Maximum Voltage
(Voltage to Ground/Line Voltage)

150V/260VAC

Ratio Error

±1% (5% to 100% of rating, RL ≤10Ω)

Phase Displacement

±0.9 c rad (5% to 100% of rating, RL ≤10Ω)

Measurement (Installation) Category

III

Pollution Degree

II

Working Temperature Range

−5°C to +55°C (daily mean temperature: 35°C or less)

Working Humidity Range

5% to 95%RH (no condensation)

5A Current Sensor Cable (500mm)

EMU2-CB-Q5B

Weight (kg)

0.1

5A Current Sensor Cable

Model

EMU2-CB-Q5A

EMU2-CB-Q5A-4W

EMU2-CB-Q5B-4W

Stocked Item

S

-

S

Cable Length (m)

0.5

0.5

0.5

Use With Module

QE81WH

QE81WH4W

QE83WH4W

Split Current Sensor Cable

Model

EMU2-CB-T1M

EMU2-CB-T5M

EMU2-CB-T10M

EMU2-CB-T1MS

EMU2-CB-T5MS

EMU2-CB-T10MS

Stocked Item

-

-

-

-

-

-

Cable Length (mm)

1000

5000

10000

1000

5000

10000

Note

Standard extension cable

Separate extension cable