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

BJ-194Y Multi Function Power Meter
User Manual BJ-194Y
Multi-Function Power Meter

BJ-194Y Multi Function Power Meter

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-194Y Multi-Function Power Meter is a mid-range 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:

With optional expansion modules, it can also transmit the parameter into 2Relay output (200) and 4Switch input (401), 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-194Y 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 voltage systems;
-. SCADA, EMS, DCS integrators.

FEATURES

2.1. – Electricity Metering
By means of an internal microprocessor it simultaneously measures:

Parameter| Symbol| A-phase| B-phase| C-phase| Total
---|---|---|---|---|---
Phase-line voltage| V| | | | /
*Phase-phase voltage| V| | | | /
Current| A| | | | /
Frequency| Hz| /| /| /|
Power factor| Cos Φ| | | |
Active power| W| | | |
Reactive power| Var| | | |
Active energy| Wh| /| /| /|
Reactive energy| Vrah| /| /| /|
Multi- tariffs energy record| Wh| /| /| /|
Voltage THD| —| | | | /
Current THD| —| | | | /
Individual harmonic (1-15′)| —| | | |

/: No such function
•: Display and communications.
Note:
Phase-phase voltage is Uba, Ube, Uca, voltage data determined by the different wiring.
The BJ-194Y 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 communication to a PC.
2.2. – 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: <0.1 VA I phase (rated 220V)
Current: <0.4VA I 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| 0.2| V1| V2| V3|
Current| 0.2| A1| A2| A3|
Active Power| 0.5| W1| W2| W3| w
Reactive Power| 0.5| var1| var2| var3| var
Apparent power| 0.5| VA1| VA2| VA3| VA
Power Factor| 0.5| PF1| PF2| PF3| PF
Active Energy| 1.0s| | | | Wh
Reactive Energy| 2.0s| | | | vrah
Frequency| 0.05| | | | Hz

– Dielectric strength
IEC I EN 61010-1:2010
2kV AC RMS 1 minute, between input I output I case I power supply
• EMC Test

supply 2kV
Surge (Shock) immunity test| EC61000-4-5 level 4| Common mode :4kV

· Work environment
Temperature: -20°C – +60°C
Humidity: RH 20% – 95% (Non-condensation)
· Storage environment
Temperature: -25°C – + 70°C
Humidity: RH 20% – 95%
· Protection
Panel: IP54
Case: IP20
· Dimensions
L x W x H =96mmx96mmx75mm
– Installation hole size
L x W = (91 +0.8mm) x (91 +0.8mm)

INSTALLATION AND START-UP

The manual you hold contains information and warnings that -users should follow 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.
3.1.- 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: BJ194J 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 2.5 square mm.
A. 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.
B. 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.
Warming: 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.
C. Sequence of wire
Warming: 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 BJ194J.
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.
D. Auxiliary power
BJ194J Series with universal (AC I 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.
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.
3.2. – Connection Terminal
Upper connection terminal

16. Analog output(+)
15. Analog output(-)
47. Active energy(+)
48. Active energy (-)
49. Reactive energy(+)
50. Reactive energy (-)| 1. Supply voltage input: 0 V
2. Supply voltage input: 220 Vac.
58. RS-485 (+)
59. RS-485 (-)
60. RS-485 (GND)
---|---

Middle connection terminal

20. Route 1 digital output(+)
19. Route 1 digital output(-)
22. Route 2 digital output(+)
21. Route 2 digital output(-)
70. Digital input COM pin
71. Route 1 digital input ( +)
72. Route 2 digital input(+)
73. Route 3 digital input(+)
74. Route 4 digital input(+)
Lower connection terminal

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 8-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!
3.3. – Typical Wiring (3P4W)![BLUE JAY BJ 194Y Multi Function Power Meter

• power](https://manuals.plus/wp-content/uploads/2024/05/BLUE-JAY-BJ-194Y- Multi-Function-Power-Meter-power.png)

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

4.1.- Full Symbol in Display Screen

4.2.- Introduction of Screen Pages

Note: In high voltage measurement, X10³ mean the showing value  multiplied by 1000, in the screen diagram mean the voltage is 1 OX1  ,000=10,000volt.
Bottom character “Ep” show total active energy is 83.6KWh.
Note: Detail information for each symbol, please refer chapter 6.1, Surround area shows the system information, in other screen are same:
show Dl1, 012, Dl3, 014 m the closed;
show 001, 002 opened;
 flicker show Communication Rx/Tx normal;
2| | Three-phase current la, lb, le.
Bottom Ep shows total negative active energy.
3| | Total active power, Total reactive power, and Total factor.
Press can switch to show independent three phase power value
Bottom Eq shows total reactive energy.
4| | Frequency of grid.
Bottom Eq shows total negative reactive energy.
5| | Multi-tariff energy record (TOU).
Bottom area “EO” – “E3”
EO: Last three months total TOU record
E1: Present month TOU record
E2: Last month TOU record
E3: Month before last month TOU record
Bottom area “T1” – “T 4” for 4 types tariff energy sum record.
Note: Press can switch Ex I Tx record value
6| | Real-time clock (RTC)
line 1 shows year
line 2 shows month
line 3 shows date
In the bottom line shows: Hour, Minute and Second
7| | Three phase voltage Total Harmonic Distortion (THD_U%)
8| | Three phase current Total Harmonic Distortion (THD_1%)
9| | Three phase voltage Individual Harmonic 2-15th
Press can switch to different harmonic
10| | Three phase current Individual Harmonic 2-15th
Press can switch to different harmonic

Notes:

1. Energy data is displayed in 8-digit decimal format by default. As counter increased, the decimal point position will move right, data increased by 10 times, the unit display changing from KWh to MWh.
2. ln special requirement order or firmware iteration, the screen may add or reduce the screen 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 O – 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 for exit menu, device will call out confirm screen ask “SAVE”
Then press exit without saving.
press save and exit.

SETUP PROCEDURE

The SETUP procedure of the BJ-194Y 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:
6.1.- Enter Setup Menu

6.2. – 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) I (secondary side current). Must set
U. scl in 1 OOV or other specified VT secondary voltage.
(2) If in order specified power grid is 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.
6.3. – Communication Port Setup
6.3.1.- RS485 communication port

Note:
(1) Modbus address setup range 1-247.
(2) Baud ratio can select 1200 I 2400 I 4800/ 9600 I 19200, regular meter equipped communication port max baud ratio are 19200bps, if need higher speed, please contact Blue Jay sales team.
6.4. – Digital Output Setup
DO port is optional module, if do not choose this external port, in Setup menu do not have this sub­ menu, and this chapter are invalid.
When device has more than one DO port, you can set the D0-2, as same step.
The physical DO relay standard is SA 2SOVAC I SA 30VDC

Notes:
(1) Relay trig threshold value have different units:
Voltage – 0.1V
Current – 0.001A
Active power – 0.1 W
Reactive power – 0.1VAR
Power factor – 0.001
Frequency- 0.01 HZ
(2) Hysteresis value is for prevent unexpected relay release, only the measurement parameter falls back lower I 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)

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+ I 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
(FFOO: close; 0000: open)| CRC
---|---|---|---|---
01| 05| 00 01| FF 00| DD FA

Slave response:

Addr.| Code| No.1 Relay
register| Relay value
(FFOO: 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 O.OOOsec (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

Alarm will not trigged| | f Δt < Delay setting value,
The Alarm will not be trigged, that can avoid influence of the transient electrical parameters
---|---|---
Alarm trigged| | When U-d is over U-set, and after delay setting time cool down, the  value is still over U-set, the alarm will be trigged
Alarm will not released| | If ΔU < Hysteresis value
The Alarm will not be released, that can avoid influence of parameter unexpected fluctuations
Alarm released| | When U-d is lower than
(U-set -Hysteresis)
The Alarm will be released

6.5. – Analog Output Setup
AO port is optional module, if do not choose this external port, in Setup menu do not have this sub­ menu, and this chapter are invalid. When device has more than one AO port, you can set the A0- 2 … , as same step. Basic specification of AO port:
Accuracy class 0.5S
Overload 120% effective output, the maximum current of 24mA, voltage 15V
Load Rmax = 4200
Isolation 1 KV to other terminal (Between AO-AO port non-isolation)

Notes:

1. Signal range default are ampere output, rang 4-20mA, 12-20mA, optional voltage signal output, optional 0-5V, 10-SV, (please contact Blue Jay sales team before order).
2. The analog parameter can set Ua, Ub, Uc, Uab, Ube, Uca, la, lb, le, Pa, Pb, Pc, PS, Qa, Qb, Qc, Qs, Sa, Sb, Sa, SS, PF, Fr.
3. Transfer parameter related secondary side value (such as AC1 OOV, AC5A), units as following.

Voltage – 0.1V
Current – 0.001A
Active power – 0.1 W
Reactive power – 0.1VAR
Power factor – 0.001
Frequency- 0.01 HZ
Example: Setup variable:
Mean transfer A-phase current is O.OOOA output 4mA, current is 5.000A output 20mA;
6.6. – System Setting

Notes:

1. Set 0000 me mean manually switch each monitor screen pages.
2. Press device will roll back to SYS root menu, only in the exit screen press 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.
5. Customers can write commands through RS485 or through the screen to clear the energy data to 0. Once the secondary side value of the internal memory reaches to2 32 (4294,967,296), counter automatically reset to 0.

6.7. – RTC and TOU Setup
Notes:

1. The weekday is independent data, only loops from 1-7, and does not linked to date information, only can be read in register map and used as data identity.
2. BJ-194Y provides last 3 months of TOU energy record. The TOU function separate one day in to 12 segments billing interval. for record starting time point in one day.
3. Device used 4 different words to indicate 4 types tariff (T1-T4) energy consumption in different time segment and record in memory. correspondence is as follows:

PULSE OUTPUT

BJ-194Y provides 2* pulse output for the total active energy & total reactive energy.
The host I PLC I 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 s 48V, lz s 50mA.
2. Pulse: 5000 imp I 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 xPT ratio» CT ratio”.

20000
100| 5
1| 20000
80000

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 1 OOV and SA.
In the time ‘T’, energy accumulated is: N / 20000 x 100 x 80

COMMUNICATION INTERFACE

8.1.- Connection for the 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.
8.2.- MODBUS © Protocol
Modbus RTU Frame Format:

Starling address, low byte
Number of registers, high byte
Number of registers, low byte
Error Check code|  2BYTE| Cyclical Redundancy Check (CRC)

MODBUS FUNCTIONS:

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).
8.3. – Register map
8.3.1- Basic power data-Primary Side

2
0x14| Pb| float| 2
0x16| Pc| float|
Ox18| PI| float| 2| Total active power, Unit: kW
Ox1a| Qa| float| 2| Individual phase reactive power, Unit: kVar
Ox1c| Qb| float| 2
Ox1e| Qc| float| 2
0x20| QE| 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| SE| float| 2| Total apparent power, Unit: kVA
Ox2a| PFa| float| 2| Individual phase power factor, 0-1.000
Ox2c| PFb| float| 2
Ox2e| PFc| float| 2
0x30| PFE| float| 2
2| Total power factor, 0-1.000
0x32| FR| float| Frequency, Unit:0.01 Hz
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
Ox3a| Eq-| float| 2| Capacitive reactive power

8.3.2 • Basic power data-Secondary Side

8.3.3· 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
Ox20A| TOU.year| int| 1| Internal RTC real time clock: Year – Month – Date – Time – Minute — Second-Day
Ox2OB| TOU.month| int| 1
Ox20C| TOU.date| int| 1
0x2OD| TOU.hour| int| 1
Ox20E| TOU.minute| int| 1
Ox2OF| TOU.second| int| 1
0x210| TOU.day| int| 1

8.3.4- Multi- tariffs ratio data

Note: In screen display the T1-T4 will display as following in screen and setup:

8.3.5· THO and Individual harmonic (Max 15 times)

0.1%
0x548 0x586| HUb| int| 32
0x588-0x5C5| HUc| int| 32
Ox5C8-0x605| Hla| int| 32| Each phase current individual Harmonic 2 15’h, unit 0.1%
0x608-0x645| Hlb| int| 32
0x648-0x685| HIc| int| 32

8.3.6 • Write operation function definition: Preset Single holding register

0: 3-phase 4-wire
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. Not all of the data above can be read by RS485, the reading address will be unsuccessful.
2. The data can be read out depends on your multi-function meter model, please refer to the corresponding product manual before build your software.
3. 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 [email protected]

8.4.- Example
Host inquiry slave device

Addr.| Func.| Data Address
(high)| Data Address
(low)| Data Number
(high)| Data number
(low)| CRC16
(low)| CRC16
(high)
---|---|---|---|---|---|---|---
OCH| 03H| OOH| OOH| OOH| 06H| C4H| D5H

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

Addr.| Func.| Byte
count| Data1 high| Data1
low| Data2
high| Data2
low| Data3
high| Data3
low
---|---|---|---|---|---|---|---|---
OCH| 03H| OCH| 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| SAH| 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 (81 and 82) of 5 amps.
   The error stems from:
   a). 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 (81 and 82) just has to be inverted.
   b). The connection of the current secondary in the current transformers have been incorrectly connected; to resolve this problem just connect the 81 transformer secondary to the 81 on the meter and the 82 on the current transformer to the 82 on the meter.

2. Once cabled and connected, is seen to give an incoherent Power factor and Cos 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 Oto 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

| Reactive power
(Pq is positive and the direction cannot be determined; P algorithm can be used to shift the voltage component by 90°)
| Electric energy

Note: In above formula, N for sampling points in one AC wave, In standard BJ- 194Y, 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: [email protected]

Tel: +0086-023-67628702
www.cqbluejay.com
Add: 1802,Building 2,No.88,Jianxin
East Road,Chongqing,400020,China
Email: [email protected] 

Read User Manual Online (PDF format)

Download This Manual (PDF format)

Download this manual  >>