BLUE JAY BJ-194Z Multi Function Power Meter User Manual

BLUE JAY BJ-194Z Multi-Function Power Meter

Product Information

• Product Name: BJ-194Z Multi-Function Power Meter
• Version: 1.53
• Revision: 2023.05
• Manufacturer: Chongqing Blue Jay Technology Co., Ltd.
• Website: www.cqbluejay.com
• Address: 1802, Building 2, No.88, Jianxin East Road, Chongqing,400020, China
• Email: tech@cqbluejay.com

Product Usage Instructions

1. Before turning on the power supply to the meter, ensure that the power supply is within the specified range for the instrument.
2. During installation, make sure that the current input terminal is non-open and the voltage input terminals are non-short circuit.
3. Strictly avoid imposing 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 a PC,ensure that the instrument communication parameters are consistent with the PC.

Please read the user manual carefully and save this document for future reference.

Directory

1. SUMMARIZE
2. FEATURES
3. INSTALLATION AND START-UP
4. SCREEN DISPLAY
   • FULL SYMBOL IN DISPLAY SCREEN
   • INTRODUCTION OF SCREEN PAGES
5. OPERATION MODE
6. SETUP PROCEDURE
7. PULSE OUTPUT
8. COMMUNICATION INTERFACE
9. SAFETY CONSIDERATIONS
10. MAINTENANCE
11. TECHNICAL SERVICE

Read me
When you use BJ-194… series multi-function 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 BJ-194… series multi-function 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

BJ-194Z Multi-function Power Meter is a LCD screen electrical panel power meter. It is the ideal choice for monitoring and measuring of 3P4W or 3P3W power systems.

It can measure all of the power parameters in power grid:

Current, Voltage,Frequency, Active power, Reactive power, Apparent power, Energy (Active/Reactive), Power factor,

With optional expansion modules, it can also transmit the parameter into 2Relay output (2DO) and 4Switch input (4DI).and 1*Analog output (1AO), For transformers, generators, capacitor banks and motors of the distributed detection, automatic control system, on-line monitoring display.
It can replace the traditional analog or many digital measurement instruments (such as ammeter, voltmeter, power meter, power factor meter, frequency meter, etc.) with the advantages of improving system reliability, making the on-site wiring convenient and reduce system cost.
With serial port, BJ-194Z can connect with PC; and use Modbus to set programming and read the data. Based on this power meters, you can simply set up a monitoring system with the IPC and central software.

APPLICATIONS

• All power parameter measurement;
• Energy Measurement and electrical fire monitor and control;
• Replacing the three-phase power meter, three phase electricity transmitter;
• Transformers, generators, capacitors and electric motors distributed detection;
• Medium and low pressure systems;
• SCADA, EMS, DCS integrators.

FEATURES

Electricity Metering

By means of an internal microprocessor it simultaneously measures:

No such function
●: Display and communication.
●●: Only can read in RS485 communication

Note:
Phase-phase voltage is Uab, Ubc, Uca, voltage data determined by the different wiring
The BJ-194Z delivers the visualization of parameters listed above by means of LCD type displays. In the main display area shows 4 power parameters, with other display area show the various parameters and state of meter on each page jump. For more details of measurement parameters please refer to the subsequent for displays introduction and RS485 communication instructions.

OTHER FEATURES

• Low-size (96 x 96 mm), panel-mounting meter.
• True R.M.S. measuring system.
• Instantaneous, maximum and minimum values of each measured parameter.
• Energy measurement (indication through a lighting led).
• RS-485 type communication to a PC.

Technical parameters

• Working Power

  • AC/DC 90-240V, 45-65Hz
  • DC 20-60V (Optional)
  • Maximum power consumption 6W

• Input

  • Voltage
  • Rated 300V L-N, (optional 100V L-N)
  • Current Rated 5A (optional 1A)
  • Frequency 45-65Hz
  • Current overload 1.2 times rated continuous; 1 seconds for 10 times the rated
  • Voltage overload 1.2 times the rated continuous; 10 seconds for 2 times the rated

• Load
  Voltage: <0.1VA / phase (rated 220V)
  Current: <0.4VA / phase (rated 5A)

• Reference Standard

  • Active energy IEC 62053-21:2018
  • Reactive energy IEC 62053-23:2018

Accuracy

Parameter| Accuracy| A phase| B phase| C phase| All
---|---|---|---|---|---
Voltage Current Active Power

Reactive Power Apparent Power Power Factor Active Energy Reactive Energy

Frequency

| 0.2

0.2

0.5

0.5

0.5

0.5

1.0s

2.0s

0.05

| V1 A1 W1

var1 VA1 PF1

| V2 A2 W2

var2 VA2 PF2

| V3 A3 W3

var3 VA3 PF3

| ****

W

var VA PF

Wh varh

Hz

Dielectric strength
IEC / EN 61010-1:2010 2kV AC RMS 1 minute, between input/output/case/power supply

EMC Test

supply 2kV
Surge (Shock) immunity test| IEC61000-4-5 level 4| Common mode :4kV

Work environment

• Temperature: -20°C ~ +60°C
• Humidity: RH 20% ~ Non-condensation

Storage environment

• Temperature: -25°C ~ +70°C
• Humidity: RH 20% ~ 95%

Protection

• Panel: IP54
• Case: IP20

Dimensions

• L × W × H =96mm×96mm×75mm

Installation hole size

• L × W = (91+0.8mm) × (91+0.8mm)

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 panel (cut-out 91+0.8 x 91+0.8 mm). 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: BJ-194… series 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 2.5 square mm, voltage of 1.5 square millimeters.

Voltage input:
Input voltage should not exceed the rated input voltage products (120Vac or 450Vac),Otherwise, you should use external CT. Suggest 1A fuse be installed in the voltage input side.

Current Input:
Standard input current is 5A, if greater than 5A should use external CT.
When the CT is connected with other instruments, make sure wiring methods be used in series.
Before remove the current input connection, must be sure to disconnect the primary circuit or shorted secondary circuit of CT. In order to facilitate disassembly, please do not connect to CT directly, and the terminal block is suggested.

Sequence of wire:
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)

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 three-wire mode, the measurement and shows the line voltage;
In three-phase four-wire mode, the measurement and shows the phase voltage.

Auxiliary power:
BJ-194… series with universal (AC / DC) power input, if not for a special statement, we provide the 220VAC/DC or 110VAC/DC power interface for standard products. Instruments limit work power supply: AC / DC: 90-240V, please ensure that the auxiliary power can match with BJ-194… series meter to prevent damage to the product.

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

Connection Terminal

Upper connection terminal

15| 16| 50| 49| 48| 47| 60| 59| 58| 2| 1
---|---|---|---|---|---|---|---|---|---|---
 |  | Eq-| Eq+| EP-| EP+| GND| RS485B| RS485A| Power supply

• 47. Total active energy (+) 1. *Supply voltage input: 0 V
• 48. Total active energy (-) 2. *Supply voltage input: 220 Vac.
• 49. Total reactive energy (+) 58. RS-485 (+)
• 50. Total reactive energy (-) 59. RS-485 (-)
  60. RS-485 (GND )

Middle connection terminal

22| 21| 20| 19| 70| 71| 72| 73| 74
---|---|---|---|---|---|---|---|---
DO2| DO1| COM| DI1+| DI2+| DI3+| DI4+

• 20. Route 1 digital output (+)
• 19. Route 1 digital output (-)
• 22. Route 2 digital output (+)
• 21. Route 2 digital output (-)
•  4. Current A-phase – S1 input
•  5. Current A-phase – S2 input
• 6. Current B-phase – S1 input
• 7. Current B-phase – S2 input
• 8. Current C-phase – S1 input
• 9. Current C-phase – S2 input

Lower connection terminal

14| 13| 12| 11| 9| 8| 7| 6| 5| 4
---|---|---|---|---|---|---|---|---|---
Un| Uc| Ub| Ua| C-phase Current| B-phase Current| A-phase Current

• 11. Voltage A-phase input
• 12. Voltage B-phase input
• 13. Voltage C-phase input
• 14. Neutral Voltage input
• 4. Current A-phase – S1 input
• 5. Current A-phase – S2 input
• 6. Current B-phase – S1 input
• 7. Current B-phase – S2 input
• 8. Current C-phase – S1 input
• 9. Current C-phase – S2 input

Note:
The terminal pin definition may change depends on customer order; please refer to the label on the meter!

Typical Wiring (3P4W)

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

WARMINGS!
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

Full Symbol in Display Screen

Introduction of Screen Pages

Note:
In special requirement order or firmware iteration, the screen may add display pages, please ask the sales team to get latest manual.

OPERATION MODE

When the device is powered up, the entire symbol will be on, and the meter starts to self- test. After few seconds, the meter is ready for operation and shows firmware, then automatic jump to The first screen.

Button| In Monitor Screen| In Config Sub-menu| In Parameter Setup
---|---|---|---
| Screen will move to previous or next page| Move cursor up and down to select function| Move setting cursor to left
| Scroll selection number 0 ~ 9
| Call out password screen| Exit & roll back to up level menu
| Call out Sub-screen or Version screen| Confirm the values &

Entry or jump to down level menu

Note: In Setup menu, if changed the setting value, press SET for exit menu, device will call out confirm screen ask “SAVE”

1. Then press SET exit without saving
   press save and exit.

SETUP PROCEDURE

The SETUP procedure of the BJ-194Z is performed by means of several SETUP options. There has a password to protect unexpectedly enter the Setup menu. Once into the Setup menu, use the keyboard to select different options and enter required variables:

Enter Setup Menu

Input Signal Setup

Notes:

1. In medium or high voltage system, set this value can expand measuring range, values represent the current transformer (primary side voltage) / (secondary side current). Must set
   U.scl in 100V or other specified VT secondary voltage.

2. If in order specified power grid are 3P3L, Blue Jay will connect Un and Ub terminal internally.
   In screen only show phase to phase parameter

3. Blue Jay calibrate meter under 380V range, high-quality linearity performance ensures that the meter can accurately measure in the lower voltage range. That can compatible with 120V, 220V,230V, 240V, 277V system.
   If need to use in different voltage scale or different types CT, please contact our sales team for more help.

Communication Port Setup

Note:

1. Modbus address setup range 1-247.
2. Baud ratio can select 1200 / 2400 / 4800/ 9600 / 19200, regular meter equipped communication port max baud ratio are 19200bps, if need higher speed, please contact Blue Jay sales team.

Digital Output Setup
DO port is optional module, if do not choose this external port, in Setup menu do not have this submenu,and this chapter are invalid.
When device has more than one DO port, you can set the DO-2, as same step.
The physical DO relay standard is 5A 250VAC / 5A 30VDC.

Notes:

1. Relay trig threshold value have different units:

   • Voltage – 0.1V
   • Current – 0.001A
   • Active power – 0.1W
   • Reactive power – 0.1VAR
   • Power factor – 0.001
   • Frequency- 0.01HZ

2. Hysteresis value is for prevent unexpected relay release, only the measurement parameter falls back lower / over a certain difference value from trig threshold, the DO can be released.
   Formula: Xm < X – Xr (Upper edge trig) or Xm > X + Xr (Lower edge trig)
   Xr = x / 10000
   Xm is measurement rms value of electrical parameter
   Example: Trig threshold value 3.700A; hysteresis value 0.03; After relay trigged, when measured value Xm < 3.589A (3.700-3.700*0.03), the relay will be released.

3. DO port preset 2 types of working mode, and can be Turned Off
   Auto Trig – When the measurement parameter over or lower the preset , the DO relay act, terminal of DO+ / DO- shorted. After the measurement parameter fall back to a certain value can be released relay coil.
   Remote – DO relay act by RS-485 control command, user can use function code 05 to trig single relay, device RS-485 port follow MODBUS-RTU protocol, command as following:
   Host inquiry:** Addr.| Code| No.1 Relay**

register

| Relay value

(FF00:close;  0000: open)

| CRC
---|---|---|---|---
01| 05| 00    01| FF    00| DD    FA

Slave response:

Addr.| Code| No.1 Relay register| Relay value (FF00:close; 0000: open)| CRC
---|---|---|---|---
01| 05| 00   01| FF   00| DD    FA
4. In Auto trig mode, after Xm > in the specified delay time, DO relay act. Setting value from 0.000sec (no delay) to 999.9 sec, default 0010 = 1sec
In Remote mode, if setup value = 0, output is Level type,
If set value = 0, output is Pulse type, value = pulse width

5. Parameter of the DO can be set, preset 52 types parameter that can be used in auto trig mode

Note: If in screen show “XX ” mean lower limit trig, for DI port mean open loop trig

Delay & Hysteresis logic
Example in upper limit alarm of A phase voltage:
U-d mean detected Ua
U-set mean Alarm value of A phase

System Setting

Notes:

1. Set 0000 mean can manually switch each monitor screen pages.
2. Press device will roll back to SYS root menu, only in the exit screen press to trigger clear operation!
3. If reset the password, please keep the password in safety, or only return to Blue Jay for reset new password!
4. Variable step value is 2/1000. Blue Jay already do calibration before shipping, please use high precision ammeter or voltmeter as reference standard.

PULSE OUTPUT
BJ-194Z provides 2* pulse output for the total active energy & total reactive energy.
The host / PLC / DI module can cumulative the data of both the active and reactive power energy sent by the pulse from opt coupler relay.

1. Electrical specification: voltage VCC ≤ 48V, Iz ≤ 50mA.
2. Pulse: 5000 imp / kWh, pulse up to 80ms.

This means: When the device detects 1 kWh, the port will generate 5000 pulse

Note: 1 kWh energy is for secondary side energy data, if there have PT and CT accessed; primary side energy data is “1 kWh ×PT ratio× CT ratio”.

Example:
In measure time “T”, the received total pulse is “N”,Primary side input of voltage is 10Kv
Primary side input of current is 400A.
Secondary side measurement range is 100V and 5A.
In the time “T”, energy accumulated is: N / 20000 × 100 × 80

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 BJ-194… and the master unit. This Bus may connect a maximum of 32pcs BJ-194…

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.
• Full range of BJ-194… meter 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:

Address code

| ****

1 BYTE

| ****

Slave device address 1-247

---|---|---

Function code

| ****

1 BYTE

| Indicates the function codes like read 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 01

| ****

Read Coil Status

| Only valid when equipped DO port

FUNCTION 02

| ****

Read Input Status

| Only valid when equipped DI port

FUNCTION 03

| ****

Reading of n Words

| This function permits to read all the electrical parameters of the BJ194…series.

FUNCTION 05

| ****

Force Single coil

| Details see chart 6.4 When DO in remote control mode can work

FUNCTION 06

| ****

Preset Single holding register

| There is an upper limit for writing, please be sure to check the upper limit of the host computer to avoid exhausting the life of the storage machine.

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

Register Map

Basic power data—Primary Side

Phase to Line Voltage, Unit: V

0x02| Ub| float| 2
0x04| Uc| float| 2
0x06| Uab| float| 2| ****

Phase to Phase Voltage, Unit: V

0x08| Ubc| float| 2
0x0a| Uca| float| 2
0x0c| Ia| float| 2| ****

Three phase Current, Unit: A

0x0e| Ib| float| 2
0x10| Ic| float| 2
0x12| Pa| float| 2| ****

Individual phase active power, Unit: kW

0x14| Pb| float| 2
0x16| Pc| float| 2
0x18| P∑| float| 2| Total active power, Unit: kW
0x1a| Qa| float| 2| ****

Individual phase reactive power, Unit: kVar

0x1c| Qb| float| 2
0x1e| Qc| float| 2
0x20| Q∑| float| 2| Total reactive power, Unit: kVar
0x22| Sa| float| 2| ****

Individual phase apparent power, Unit: kVA

0x24| Sb| float| 2
0x26| Sc| float| 2
0x28| S∑| float| 2| Total apparent power, Unit: kVA
0x2a| PFa| float| 2| ****

Individual phase power factor, 0~1.000

0x2c| PFb| float| 2
0x2e| PFc| float| 2
0x30| PF∑| float| 2| Total power factor, 0~1.000
0x32| FR| float| 2| Frequency, Unit:0.01Hz
0x34| Ep+| float| 2| Positive active energy, Unit: kWh
0x36| Ep-| float| 2| Negative active energy, Unit: kWh
0x38| Eq+| float| 2| Inductive reactive power, Unit: kVarh
0x3a| Eq-| float| 2| Capacitive reactive power

Basic power data—Secondary Side

Phase to Line Voltage, Unit: 0.1V

0x101| Ub| int| 1
0x102| Uc| int| 1
0x103| Uab| int| 1| ****

Phase to Phase Voltage, Unit: 0.1V

0x104| Ubc| int| 1
0x105| Uca| int| 1
0x106| Ia| int| 1| ****

Three phase Current, Unit: 0.001A

0x107| Ib| int| 1
0x108| Ic| int| 1
0x109| Pa| int| 1| ****

Individual phase active power, Unit: W

0x10a| Pb| int| 1
0x10b| Pc| int| 1
0x10c| P∑| int| 1| Total active power, Unit: W
0x10d| Qa| int| 1| ****

Individual phase reactive power, Unit: Var

0x10e| Qb| int| 1
0x10f| Qc| int| 1
0x110| Q∑| int| 1| Total reactive power, Unit: Var
0x111| Sa| int| 1| ****

Individual phase apparent power, Unit: kVA

0x112| Sb| int| 1
0x113| Sc| int| 1
0x114| S∑| int| 1| Total apparent power,    Unit: VA
0x115| PFa| int| 1| ****

Individual phase power factor, 0~1.000

0x116| PFb| int| 1
0x117| PFc| int| 1
0x118| PF∑| int| 1| Total power factor, 0~1.000
0x119| FR| int| 1| Frequency, Unit:0.01Hz
0x11a| Ep+| int| 2| Positive active energy, Unit: Wh
0x11c| Ep-| int| 2| Negative active energy, Unit: Wh
0x11e| Eq+| int| 2| Inductive reactive power, Unit: Varh
0x120| Eq-| int| 2| Capacitive reactive power

Meter status data

for closed
0x201| DI| int| 1| Bit 0~3 show channel 1 to channel 4 status 0 for open, 1 for closed

Write operation function definition: Preset Single holding register

1: 3-phase 3-wire 2CT

2: 3-phase 3-wire 3CT

0x901| U.SCL| int| 1| Voltage range 0:100V 1:380V
0x902| I.SCL| int| 1| Current range 0:1A 1:5A
0x903| PT| int| 1| Voltage ratio
0x904| CT| int| 1| Current ratio

Notes:

1. The data can be read out depends on your multi-function meter model, please refer to the corresponding product manual before build your software.
2. Some software has different definitions of the start bit of register address, there will be offset, please add 1 for the right address. To get more info, please contact technical support.

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 BJ194… series 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 (Please refer to voltage PT ratio setting section in chapter SETUP PROCEDUCE).

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; (Please refer to current CT ratio setting section in chapter SETUP PROCEDUCE).

Calculation formula of electrical parameter

Note: In above formula, N for sampling points in one AC wave, In standard BJ-194Z, the N=128

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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