BLUE JAY 19D-NX Modular Multifunction Energy Meter User Manual

BLUE JAY 19D-NX Modular Multifunction Energy Meter

Product Information

The 19D-NX Modular Multifunction Energy Meter is a flexible modular design product that can expand up to 64 channels of metering points, plus 16 I/O ports for field control. It has a dedicated dot-matrix LCD full Chinese display module and a well-designed Chinese graphic display interface, which can display multiple information in real-time. Its operation mode is humanized, and the operator can master the operation of reading data and parameter setting in a short time. The product features class 0.2/0.5 basic parameter and class 1 for active energy, flexible  combination of up to 403P3P/3P4W or 1201P2W branch circuit metering, standard 35mm DIN rail mounting: 4M width (core unit), 3N  width (expand circuit unit), 1.6” dot matrix LCD screen, RS-485 Modbus/RTU Communications, Optional IoT expand module, and Optional Ethernet expand module.

Product Usage Instructions

1. Before turning on the power supply, ensure that the power supply is within the provisions of the instrument.
2. During installation, ensure that the current input terminal is non-open and voltage input terminals are non-short circuit.
3. Do not impose high pressure on the communication terminal (RS232/RS485).
4. Ensure that the instrument wiring is consistent with the internal system settings.
5. When communicating with the PC, make sure that the instrument communication parameters are consistent with the PC.
6. Read the user manual carefully and fully understand the implications and correct guidance of operations in accordance with the user manual before using the 19D-NX Modular Multifunction Energy Meter.
7. The product is suitable for all power parameter measurement, energy measurement and electrical fire monitor and control, transformers, generators, capacitors and electric motorsdistributed detection, medium and low-pressure systems, SCADA, EMS, DCS integrators.

Read me
When you use 19D-NX modular multifunction energy meter, be sure to read this user manual carefully, and be able to fully understand the implications, the correct guidance of operations in accordance with user manual, which will help you make better use of 19D-NX modular multifunction energy meter, and help to solve the various problems at the scene.

1. Before the meter turning on the power supply, be sure that the power supply within the provisions of the instrument;
2. When installation, the current input terminal must non-open, voltage input terminals must Non-short circuit;
3. Communication terminal (RS232/RS485) is strictly prohibited to impose on high pressure;
4. Be sure the instrument wiring consistent with the internal system settings;
5. When communicating with the PC, instrument communication parameters must be consistent with the PC.

• Please read this user manual carefully
• Please save this document

SUMMARIZE

19D-NX Modular Multifunction Energy Meter adopts a dedicated dot-matrix LCD full Chinese display module and a well-designed Chinese graphic display interface, which can display multiple information in real time. With bright backlight, the operator can read accurately even in poor light conditions data. The operation mode is humanized, and the operator can master the operation of reading data and parameter setting in a short time
This flexible modular design product can expand up to 64 channels of metering points, plus 16 I/O ports for field control. Optional 100mA or 333mV CT connect, provide max 0.5 class metering accuracy. RS485 Modbus-RTU port or Ethernet port or extra IoT module valid for different project.

FEATURES

• Class 0.2/0.5 basic parameter and class 1 for active energy
• Flexible combination of up to 403P3P/3P4W or 1201P2W branch circuit metering
• Standard 35mm DIN rail mounting: 4M width (core unit), 3N width (expand circuit unit)
• 1.6’’ dot matrix LCD screen
• RS-485 Modbus/RTU Communications
• Optional IoT expand module
• Optional Ethernet expand module

APPLICATIONS

• All power parameter measurement;
• Energy measurement and electrical fire monitor and control;
• Transformers, generators, capacitors and electric motors distributed detection;
• Medium and low pressure systems;
• SCADA, EMS, DCS integrators.

TECHNICAL PARAMETERS

Current measurement on inputs (TRMS)

Rating of CT secondary| 100mA, 50mA, 2.5mA
Measurement range| 0 … 11 kA
Input consumption| <0.4VA
Accuracy| 0.5% (IEC61557-12)
Impedance| <10mΩ
Overload capacity| 1.2 times of rating, continuous 10 times of rating, 5s
Voltage measurement (TRMS)|
Measurement range| 18 … 300 VAC
PT secondary| 100VAC / 400VAC
Input consumption| <0 .1 VA
Accuracy| 0.5% (IEC61557-12)
Impedance| >1MΩ
Overload capacity| 1.2 times of rating, continuous 2 times of rating, 1s
Frequency measurement|
Measurement range| 45 – 65 Hz
Accuracy| ±0.02Hz
Energy accuracy|
Active energy| Class 1.0 (IEC 62053-22)
Reactive energy| Class 2.0 (IEC 62053-23)
Auxiliary power supply|
Rating| DC/AC 85~265 ± 10 %
Frequency| 50 / 60 Hz
Consumption| < 10 VA
Auxiliary power supply (Expand unit)
Rating| 12Vdc
Consumption| <0.9W
Communication|
Link| RS485 (2/3 wires half duplex)
Protocol| Modbus RTU mode
MODBUS speed| 4800/9600bauds
Safety|
Isolation withstand voltage| AC 1KV/1min

INSTALLATION AND START-UP

The manual you hold in your hand contains information and warnings that the user should respect in order to guarantee a proper operation of all the instrument functions and keep it in safety conditions. The instrument must not be powered on and used until its definitive assembly is on the cabinet’s door.

If the instrument is not used as manufacturer’s specifications, the protection of the instrument will be damaged.
When any protection failure is suspected to exist (for example, it presents external visible damages), the instrument must be immediately powered off. In this case contact a qualified service representative.

Installation
Mounting
Instrument is to be mounted on 35mm Din-rail. Keep all connections into the cabinet. Please note that with the instrument powered on, the terminals could be dangerous to touch and cover opening actions or elements removal may allow accessing dangerous parts. Therefore, the instrument must not be used until this is completely installed.

Dimension:

Notes:
Input signal: 19D-NX using a separate acquisition calculate for each measurement channel, to ensure consistent in use, for different load forms, it’s a variety of connection mode. Access wire shall be met the current is 2.5 square millimeters, and the voltage is 1.5 square millimeters.

• Voltage input
  Input voltage should not exceed the rated input voltage products 450V.
  Otherwise, you should use external VT. Suggest 1A fuse be installed in the voltage input side.

• Current Input
  Standard input current is 5A or 1A, if greater than 5A/1A should use external CT.
  When the CT is connected with other meters, make sure wiring methods be used in series.
  Warning: Forbid to install a CT on the live feeder wire with open secondary leads. This can be extremely dangerous!
  Before remove the current input connection, must be sure to disconnect the primary circuit or shorted secondary circuit of CT.

• Sequence of wire
  Warning: Please make sure that the input voltage and current corresponding to the same phase, sequence, and the same direction; Otherwise, the Values and symbols will be wrong! (Power and Energy)
  Always observe the physical orientation of CT (P1 – P2) when installing on the feeder wire. Always pay attention to wiring polarity and phasing when terminating the CT leads to the 19D-NX. S1 connect to Ix*, S2 connect to Ix.
  The input network configuration of instrument depends on the CT number of the system:
  in the condition of 2 CT, select the three-phase, three-lines two components;
  in the condition of 3 CT, select the three-phase, four-lines three component mode.
  Instrument connection mode, set of the instrument (programming input network NET) should be the same load wiring as measured wiring. Otherwise, the measurement instrument will lead to incorrect voltage or power.
  In three-phase 3 wire mode, measurement and shows the line voltage;
  In three-phase 4 wire mode, measurement and shows the phase voltage and line voltage both.

• Auxiliary power
  19D-NX with universal (AC / DC) power input, if not for a special statement, we provide the 90-240AC/DC power interface for standard products, please ensure that the auxiliary power can match with meter to prevent unexpected damage.

  • Suggest install 1A fuse in the fire line side.
  • For the areas with poor power quality, suggest install lightning surge suppressor and rapid burst suppressor to prevent lightning strikes.

Connection Terminal
Monitor connection terminal

1| 2| | 58-1| 59-1| 60-1| 58-2| 59-2| 60-2| 50-1| 51-1|
---|---|---|---|---|---|---|---|---|---|---|---
L| N| | A-1| B-1| ┴ -1| A-2| B-2| ┴ -2| V+| V-|

1. Auxiliary power
2. Auxiliary power
3. 58- 1.RS485A-1
4. 59- 1.RS485A-1
5. 60- 1.RS485A ┴ -1
6. 58-.RS485A-1
7. 59- 2.RS485A-1
8. 60- 2.RS485A ┴ -2
9. 50- 1. V+, DC 12V
10. 51- 1. V+, DC 12V

Controller connection terminal

Upper connection terminal

• 51-2. V+, DC 12V
• 50-2. V-, DC 12V
• 9-2. The second C-phase current input
• 8-2. The second C-phase current input
• 7-2. The second channel B phase current input
• 6-2. The second channel B phase current input
• 5-2. The second channel A phase current input
• 4-2. The second channel A phase current input

Middle connection terminal

• A phase voltage input
• A phase voltage input
• A phase voltage input
• A phase voltage input

Lower connection terminal

• 4-1. The first A-phase current input
• 5-1. The first A-phase current input
• 6-1. The first B-phase current input
• 7-1. The first B-phase current input
• 8-1. The first C-phase current input
• 9-1. The first C-phase current input
• 58-3. RS485A-3
• 59-3. RS485B-3

DIP Switch Instructions

The DIP switch has 8 digits in total, 1, 2, 3, 4., 5, 6, 7, 8. Each digit represents a numerical value. Pushing to the ON position is 0, and dialing to the bottom represents 1, 2, 4 in turn., 8, 16, 32, 64, 128, add the values represented by dialing the digits below, which is the address code of the machine, (as shown in the figure, number 11 is: 1+2+8=11, number 30 is: 2+4+8+16=30) The maximum address code is 128, and the following are the first 32 commonly used address dial codes

Typical Wiring

Note:
The main body can be connected to N (N≤20) splits

This connection drawing is for reference only; the actual connecting terminal please refer to the label on the rear part.

WARNINGS!
If power = -0.01 is shown for any of the phases and voltage and current are not zero for this phase, check out following points:

• Assure that A, B and C phases coincide in voltage and current.
• Correct polarity? Reverse the current transformer placed at this phase.

SCREEN DISPLAY

Screen description:

1. The top row is reverse display information characters
2. Channel C01-1″ indicates the main display parameters of the current screen; indicates that the device is communicating with the host computer.
3. The three rows in the middle are real-time display of measurement data.

Button description:

| Short press is the up key, switch circuit channel data display: 1st channel (C01-1) – Nth channel (C0N-2)
---|---
Short press is the down button to turn the page and display the measurement data, displaying voltage, current, power, electric energy and other measurement data;

Long press is the menu key to enter the programming menu, and it is also a function key to exit the menu step by step.

On the voltage, power, electric energy, harmonic interface, short press to switch the page display.

Short press on the menu interface as the confirmation key to confirm and save the entered information or displayed settings

OPERATION DESCRIPTION

Main menu
Press the page-turning key in any display interface, and the measurement data display area will display the corresponding data. Each time the page-turning key is pressed, it will scroll down one screen, and it will automatically return to the first screen after reaching the last screen. As shown below:

Setup procedure
Long press the “Down” button in the measurement interface to enter the menu system, prompting to enter the password, enter the user-level password (default is 0001), press the confirmation button to enter the programming menu, the instrument provides detailed menu items, the user can follow the prompts programming.
Menu Flowchart:

COMMUNICATION INTERFACE

Connection for RS485 BUS
The composition of the RS-485 cabling must be carried out with a meshed screen cable (minimum 3 wire), diameter of not less than 0.5mm2, with a maximum distance of 1,200 m between the 19D-NX… and the master unit. This Bus may connect a maximum of 32pcs

Notes:

• For communication with the master unit, user can choose RS-485 to RS-232 converter or RS485 to USB adapter to use.
• For expand the number of devices in the communication network, a signal repeater can be used. -. RS485 PIN number is 58,59,60
• Due to product modifications or special requirements, the interface pin place may be change. For details, please refer to product label on the rear side

MODBUS © Protocol
Modbus RTU Frame Format:

coils / inputs_
Data code| 4 BYTE| Starting address, high byte Starting address, low byte Number of registers, high byte Number of registers, low byte
Error Check code| 2 BYTE| Cyclical Redundancy Check ( CRC )

MODBUS FUNCTIONS:

FUNCTION 03

| Reading of n Words| This function permits to read all the electrical parameters
FUNCTION 06| Preset Single register| Disable in default
If need valid this code, please contact Blue Jay Sales Team before your order!

Note: Float data follow IEEE754, float low bit first, high bit next. (CD AB)

Register Map
primary parameter

Three-phase current data, unit A

14| Module 1-1 way Ib| float| 2
16| Module 1-1 way Ic| float| 2
18| Module 1-1 way Pa| float| 2| ****

Split-phase and total active power, unit kW

20| Module 1-1 way Pb| float| 2
22| Module 1-1 wayPc| float| 2
24| Module 1-1 wayP∑| float| 2
26| Module 1-1 wayQa| float| 2| ****

Split phase and total reactive power, unit kvar

28| Module 1-1 wayQb| float| 2
30| Module 1-1 wayQc| float| 2
32| Module 1-1 wayQ∑| float| 2
34| Module 1-1 waySa| float| 2| ****

Split phase and total apparent power KVA

36| Module 1-1 waySb| float| 2
38| Module 1-1 waySc| float| 2
40| Module 1-1 wayS∑| float| 2
42| Module 1-1 wayPFa| float| 2| Split phase and total power factor 0~1.000
44| Module 1-1 wayPFb| float| 2
46| Module 1-1 wayPFc| float| 2
48| Module 1-1 wayPF∑| float| 2
50| Module 1-1 wayFR| float| 2| Voltage frequency 0.01Hz
52| Module EpZ+| 1-1| way| float| 2| Total forward active energy, unit kWh
54| Module EpZ-| 1-1| way| float| 2| Total reverse active energy (two- way metering energy-conveying active energy)
56| Module EqZ+| 1-1| way| float| 2| Total inductive reactive energy, unit kVarh
58| Module EqZ-| 1-1| way| float| 2| Total capacitive reactive energy
60| Module EpA+| 1-1| way| float| 2| Phase A forward active energy, unit kWh
62| Module 1-1 way EpA-| float| 2| A-phase reverse active energy (two-way metering electric energy- transmitting active electric energy)
64| Module 1-1 way EqA+| float| 2| Phase A inductive reactive energy, unit kVarh
66| Module 1-1 way EqA-| float| 2| A compatible reactive energy
68| Module 1-1 way EpB+| float| 2| Phase B forward active energy, unit kWh
70| Module 1-1 way EpB-| float| 2| B-phase reverse active energy (two-way metering electric energy- transmitting active electric energy)
72| Module 1-1 way EqB+| float| 2| Phase B inductive reactive energy, unit kVarh
74| Module 1-1 way EqB-| float| 2| B compatibility reactive energy
76| Module 1-1 way EpC+| float| 2| Phase C forward active energy, unit kWh
78| Module 1-1 way EpC-| float| 2| C-phase reverse active energy (two-way metering electric energy- transmitting active electric energy)
80| Module 1-1 way EqC+| float| 2| Phase C inductive reactive energy, unit kVarh
82| Module 1-1 way EqC-| float| 2| C Compatibility Reactive Energy
100-182| Primary parameter of module 1-2| float| | The data format corresponds to the module 1-1 channel one-to-one
200-282| Primary parameter of module 2-1| float| | The data format corresponds to the module 1-1 channel one-to-one
200-282| Primary parameter of module 2-2| float| |
300-382| Primary parameter of module 3-1| float| |
.| .| .| .|
3800- 3882| Module 20-1 primary parameter| float| |
3900- 3982| Module 20-2 primary parameter| float| |

Status and setting parameters (DO and DI status cannot be changed, other parameters can be modified by command 06)

1st~2nd output status

6401

| ****

Module 1 DO status

| ****

int

| ****

1

| Switch input information Bit0~3 Channel 1~4 switch-in state
6402- 6419| Module 1 retains data| | | Reserve
6420| Module 1DO1 mode| Int| 1| 0 Remote Mode 1 Local Alarm Mode 2 Off
6421| Module 1DO1 action delay time| Int| 1| Alarm mode: 0.0-999.9 seconds Remote control mode: 0: level mode Other values: pulse mode pulse width (0.1-999.9 seconds
6422| Module 1DO1 alarm parameters| Int| 1| Any parameters of the two loops are valid beyond the limit, and the meanings are as follows:

0: UA high report 1: UB high report 2: UC high report 3: UAB high report 4: UBC high report 5: UCA high report

6: UA/UB/UC any one phase high report 7: IA high report

8: IB high report 9: IC high report

10: any 1 channel current high report 11: PA high report

12: PB high report 13: PC high report

14: total active power high report 15: QA high report

16: QB high report 17: QC High Report

18: Total Reactive Power High Report 19: SA High Report

20: SB High Report 21: SC High Report

22: Total Apparent Power High Report 23: Total Power Factor High Report 24: Frequency High Report

25: DI1 Combined report 26: DI2 combined report 27: DI3 combined report 28: DI4 combined report 29: DI5 combined report 30: DI6 combined report 31: UA low report 32: UB low report 33: UC low report.

6423| Module 1DO1 alarm value| Int| 1| Alarm value, power secondary value
6424| Module 1DO1 hysteresis| Int| 1| return difference
6425| Module 1DO2 mode| Int| 1| DO2 setting method is the same as DO1
6426| Module 1 DO2 action delay time| Int| 1|
6427| Module 1DO2 alarm parameters| Int| 1|
6428| Module 1 DO2 alarm value| Int| 1|
6429| Module 1 DO2 hysteresis| Int| 1|
6430- 6439| Module 1 Reserved| Int| | Reserve
6440| Module 1 Wiring Type| Int| 1| Signal type: 0 three-phase four-wire 1 three-phase three-wire 2CT 2 three-phase three-wire 3CT 0-9999, unit V 0-9999, unit 0.1A
644| Module 1 voltage range| Int| 1|
6442| Module 1 current range| Int| 1|
6443| Module 1 voltage ratio| Int| 1| Input range: 1-9999
6444| Module 1-1 channel current ratio| Int| 1| Input range: 1-9999
6445| Module 1-2 channel current ratio| Int| 1| Input range: 1-9999
6446- 6447| Module 1 Reserved| Int| | Reserve
6448| Module 1 clears power| Int| 1| Enter hexadecimal 0x0A0A, that is, decimal 2570
6450- 6498| Module 2 data| Int| | The data format corresponds to module 1 one by one
6450- 6498| Module 3 data| Int| |
.| .| .| .|
7300- 7348| Module 19 data| Int| |
7350- 7398| Module 20 data| Int| |

Voltage Harmonic Data

unit 0.1%
8001| module 1THDUb| int| 1| Total Harmonic Distortion of Phase B

Voltage

8002| module 1THDUc| int| 1| Total Harmonic Distortion of Phase C Voltage
8003| module 1TOHDUa| int| 1| A-phase voltage odd harmonic total distortion, unit 0.1%
8004| module 1TOHDUb| int| 1| B-phase voltage odd harmonic total

distortion

8005| module 1TOHDUc| int| 1| C phase voltage odd harmonic total distortion
8006| module 1TEHDUa| int| 1| Phase A voltage even harmonic total distortion, unit 0.1%
8007| module 1TEHDUb| int| 1| B phase voltage even harmonic total distortion
8008| module 1TEHDUc| int| 1| C phase voltage even harmonic total distortion
8020- 8039| module 1HUa| int| | Phase A voltage 2-21 harmonic component, unit 0.1%
8040- 8059| module 1HUb| int| | Phase B voltage 2-21 harmonic components
8060- 8079| module 1HUc| int| | Phase C voltage 2-21 harmonic components
8100- 8179| module 2 data| Int| | The data format corresponds to module 1 one- to-one
8200- 8279| module 13 data| Int|
.| .| .| .
9800- 9879| module 19 data| Int|
9900- 9979| module 1 data| Int|

Current Harmonic Data

current of the 1st circuit, unit 0.1%
11201| Module 1-1 way THDIb1| int| 1| The total harmonic distortion of the first B-phase current
11202| Module 1-1 way THDIc1| int| 1| The total harmonic distortion of the

first C-phase current

11203| Module 1-1 way TOHDIa1| int| 1| Odd order harmonic total distortion of phase A current of the 1st circuit, unit 0.1%
11204| Module 1-1 way TOHDIb1| int| 1| Odd-order harmonic total distortion of the first B-phase current
11205| Module 1-1 way TOHDIc1| int| 1| Odd-order harmonic total distortion of the first C-phase current
11206| Module 1-1 way TEHDIa1| int| 1| The total distortion of the even- order harmonics of the phase A current of the 1st circuit, unit 0.1%
11207| Module 1-1 way TEHDIb1| int| 1| Even-order harmonic total distortion of the first B-phase current
11208| Module 1-1 way TEHDIc1| int| 1| Even-order harmonic total distortion of the first C-phase current
11220- 11239| Module 1-1 way HIa1| int| | The 2nd-21st harmonic component of the first channel A-phase current, unit 0.1%
11240- 11259| Module 1-1 way HIb1| int| | The 2-21th harmonic component of the first B-phase current
11260- 11279| Module 1-1 way Hic1| int| | The 2-21th harmonic component of the first C-phase current
11300- 11379| Module 1-2 current harmonics| int| | The data format is in one- to-one correspondence with the first channel
11400- 11479| Module 2-1 current harmonics| int|
.| .| .| .
15000- 15079| Module 20-1 current harmonics| int|
15100- 15179| Module 20-2 current harmonics| int|

Display module status parameters (starting from 20032, it can be modified by command 06)

online, 1 means the module is online
20001| module 2 communication status| int| 1| 0 means the module is not online, 1 means the module is online
.| .| .| .|
20019| module 20 communication status| int| 1| 0 means the module is not online, 1 means the module is online
20020- 20031| reserve| | |
20032| number of modules| int| 1| Input range: 1-20

20033

| module 1 communication address| ****

int

| ****

1

| ****

Input range: 1-247

20034| module 2 communication address| int| 1| Input range: 1-247
.| .| .| .|
20052| module 20 communication address| int| 1| Input range: 1-247
20053- 20069| reserve| | |
20070| TIME.year| int| 1| Internal RTC real-time time: year- month-day-hour- minute-second-week can be set
20071| TIME.month| int| 1
20072| TIME.date| int| 1
20073| TIME.hour| int| 1
20074| TIME.minute| int| 1
20075| TIME.second| int| 1
20076| TIME.day| int| 1

Example
Host inquiry slave device

Addr.| Func.| Data Address high| Data Address low| Data Number high| Data number low| CRC16

low

| CRC16

high

---|---|---|---|---|---|---|---
0CH| 03H| 00H| 00H| 00H| 06H| C4H| D5H

PC user ask upload UA, UB, UC, IA, IB, IC
Slave device response

Addr.| Func.| Byte count| Data1 high| Data1 low| Data2 high| Data2 low| Data3 high| Data3 low
---|---|---|---|---|---|---|---|---
0CH| 03H| 0CH| 03H| E8H| 03H| E9H| 03H| E8H
Data4 high| Data4 low| Data5 high| Data5 low| Data6 high| Data6 low| CRC16

low

| CRC16

high

|
13H| 84H| 13H| 88H| 13H| 8AH| A6H| D6H|

Show the data:
UA=3E8H (100.0)
UB=3E9H (100.1)
UC=3E7H (99.9)
IA=1384H (4.996)
IB=1388H (5.000)
IC=138AH (5.002)

Notes:

1. Blue Jay disable the 06 function in default setting, if Activated the write command, please check the host device program to avoid the meaningless write operation, that may reduce the reduce the register working life.
2. When the write is unsuccessful, no return data from the slave device. In this addition, please re-send write inquiry again.

SAFETY CONSIDERATIONS

All installation specification described at the previous chapters named: INSTALLATION AND STARTUP, INSTALLATION MODES and SPECIFICATIONS.
Please note that with the instrument powered on, the terminals could be dangerous to touching and cover opening actions or elements removal may allow accessing dangerous parts. This instrument is factory-shipped at proper operation condition.

• The device must have a professional installation and maintenance
• Any operation of the device, you must cut off the input signal and power;

MAINTENANCE

The 19D-NX modular multifunction energy Meter does not require any special maintenance. No adjustment, maintenance or repairing action should be done when the instrument is open and powered on, should those actions are essential, high-qualified operators must perform them.
Before any adjustment, replacement, maintenance or repairing operation is carried out, the instrument must be disconnected from any power supply source.
When any protection failure is suspected to exist, the instrument must be immediately put out of service. The instrument’s design allows a quick replacement in case of any failure.

TECHNICAL SERVICE

FAQ’s

1. Once cabled and connected is seen to give a correct voltage and current reading, but shows  negative values for active power (generation).
   This is an error with the cabling for the current transformer secondary; the direction of the transformer current has to be respected as shown in the connection diagram. The current transformers have a two face primary; the current must pass from P1 to P2 giving the result in secondary (S1 and S2) of 5 amps.
   The error stems from:

   • The current transformers have been incorrectly installed. As a result, it gives the direction  of the current as passing from P2 to P1; to resolve this problem, the current transformer does not have to be dismantled and installed again, but the transformer secondary (S1 and S2) just has to be inverted.
   • The connection of the current secondary in the current transformers have been incorrectly connected; to resolve this problem just connect the S1 transformer secondary to the S1 on the meter and the S2 on the current transformer to the S2 on the meter.

2. Once cabled and connected, is seen to give an incoherent Power factor and CosΦ reading (- 0.01 or similar).
   This is again a current transformer and voltage phase connection error phase A, must correspond to the current transformer installed in phase A; phase B, must correspond to the current transformer installed in phase B; and phase C, must correspond to the current transformer installed in phase C. This connection terminal is clearly shown on the area side of the device.

3. The measuring voltage and is displaying the secondary voltage (for example 110 volts). Ensure that the voltage Transformer ratio has been correctly set.

4. Device does not correctly display the current reading. It shows values varying between 0 to 5 amps of current.
   Ensure that the Current Transformer ratio has been correctly set.

Calculation formula of electrical parameter

algorithm can be used to shift the voltage component by 90o)
| Electric energy

Note: In above formula, N for sampling points in one AC wave.
For any inquiry about the instrument performance or any failure, contact to Blue Jay’s technical service.
Blue Jay – After-sales service
E-mail: tech@cqbluejay.com
Tel: +0086-023-67628702
www.cqbluejay.com
Add: 1802,Building 2,No.88,Jianxin East Road,Chongqing,400020,China
Email: tech@cqbluejay.com

References

• Blue Jay - Industrial Electric Automation Manufacturer - Power & Energy Meters, Automatic protection relay etc.

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