BLUE JAY UBCW2K-Series DC Protection Relay User Manual

BLUE JAY UBCW2K-Series DC Protection Relay

When you use GYDCG-UBCW2K- Series, 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 GYDCG-UBCW2K- Series, and help to solve the various problems at the scene.

1. Before 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 (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.

SUMMARIZE

GYDCG-UBCW2K series is a DC-to-ground insulation monitoring module based on the principle of unbalanced bridge, which has monitoring and protection functions in one. It can monitor the insulation resistance value of the positive and negative poles of the DC floating system to the ground, ranging from 0Ω to 10MΩ; at the same time, it can also detect the DC voltage value, ranging from 0V to 2000V. The insulation resistance monitoring can only be realized when the DC voltage is between 100V and 2000V. When the DC voltage is less than 100V, or the insulation monitoring is not enabled, the insulation resistance read is 65535 (invalid number). When the measured value is greater than 10MΩ, the value received by the communication is 60000 (infinity). After the insulation monitoring function is turned on, the product continues to monitor the insulation resistance in real time, and the user can read the insulation resistance value as soon as 1 second after the insulation monitoring function is turned on. For the presence of DC-to-ground capacitance, the module can realize self-adaptive monitoring of the ground capacitance below 3μF (the positive and negative poles to the ground capacitance are respectively below 3μF, and the total capacitance is below 6μF). When there is a ground-to-ground capacitance, the monitoring time is the longest No more than 2.5s.

FEATURES

• High voltage grounding switch
• Widely power supply range
• Widely insulation monitoring range (0V~2000VDC)
• insulation monitoring equipment self-test
• Adaptive capacitance to ground
• Convenient parameter setting
• Remote monitoring and management
• Monitor positive and negative poles
• Ground insulation resistance
• Voltage reverse polarity alarm

APPLICATIONS

• Insulation resistance monitoring
• DC voltage monitoring
• Guarantee the safety and stability of charging
• Improvement of the efficiency and charging quality
• Personnel and equipment security

The LED display
After the module is powered on, the PWR indicator is on. When the insulation monitoring is power on, the “L1” light is on, and when the insulation monitoring is power off, the “L1” light is off. When the insulation resistance is less than the alarm threshold, the ‘LD2’ light is on; otherwise, the ‘LD2’ light is off.

DIP switch configuration bit
When the corresponding dial is turned to the “ON” direction, it is set to “1”. The 4-bit DIP switch of CONFIG1, the first bit sets the baud rate, 9600bps or 19200bps; the 2~4 bits set the communication address. The 6-bit DIP switch of CONFIG2 is used to set the insulation resistance alarm threshold.

Insulation resistance alarm threshold setting
The insulation resistance alarm threshold can be set through the 1-5 digits of the CONFIG2 dial switch, among which the 1-4 digits are the set value, and the fifth digit is the setting magnification. If the setting value is 15 and the magnification is 10, the set alarm is only 150KΩ.

Relay output
When the insulation resistance is lower than the set threshold, the alarm relay output terminals, namely ‘OV+’ and ‘OV-‘ terminals are closed. Users can connect the OV+ terminal and OV- terminal in series with the electrical system to realize the protection function. The series current should be less than 3A, and the open circuit voltage should be less than 250VAC/30VDC.

TECHNICAL PARAMETERS

Basic parameters

(DC System voltage:100V~2000V)

Insulation monitoring accuracy

| DC voltage:100V-300V| ≤3kΩ+10%
DC voltage:300V-2000V| ≤3kΩ+5%
CY>0.3μF, insulation

resistance>1MΩ or CY>1μF

| >10%
Off-line pressure test| <2mA
Maximum relay switching voltage| 250VAC/30VDC
Maximum relay switching current| 3A
Relay contact resistance| <100mΩ
Relay insulation resistance| 100MΩ
Standard| IEC 61851-23 (2014-03):2014-11
Humidity| 85%
Storage temperature| – 40°C ~125°C
Operating temperature| – 40°C ~75°C

Notes :

1. When facing the ground insulation resistance RISO+ and negative insulation resistance to ground RISO-, The difference is too large, Multiplier of difference>5 times, RISO+ and RISO- Large resistors may not be typical values.
2. CY Refers to the positive and negative Y capacitance values of the system bus to ground respectively.

INSTALLATION AND STAR UP

Mounting
GYDCG-UBCW2K module can be installed by rail or screw. Guide rails use standard width of 35mm. Overall dimensions are shown below: (Unit: mm)

Wiring Method

DC interface 1

DC-| Negative pole of DC
Vin| Positive pole of power supply| ****

10-30Vdc

0V| Negative pole of power supply
A| RS485-A|
B| RS485-B|
GND| Grounding point|
OV+| Alarm relay output|
OV-| Alarm relay output|

COMMUNICATION INTERFACE

Connection for RS485
Users can send and receive data frames through the RS485 communication port, and the circuit is equipped with a 120Ω terminal resistor. The specific operation method can be found in the “RS485 communication protocol”. Terminals A and B correspond to A and B output by RS485 respectively.

Communication Protocol
GYDCG-UBCW2K provides Modbus RTU protocol interface, using Modbus RTU 0x03/0x06 command; baud rate, communication address, can be set by dial switch, stop bit 1, data bit 8. The time interval between each byte in the sending frame must not exceed 20ms, otherwise the frame will be cleared. This module works in slave mode.

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 Length of registers, high byte Length of registers, low byte

Error Check code

| ****

2 BYTE

| ****

Cyclical Redundancy Check ( CRC )

MODBUS FUNCTIONS:

FUNCTION 03

| ****

Read hold register

| This function permits to read all the electrical parameters

FUNCTION 06

| ****

Write single register

| ****

This function permits to write a value into a single holding register.

Command samples

Read Command (Function x 03)

Sample 1
Read the DC bus voltage and positive and negative electrode resistance to the ground(read 4 registers)

Host inquiry:
01 03 00 10 00 04 45 CC
Slave response:
01 03 08 00 00 02 58 EA 60 02 58 81 64

Notes:
Read the DC voltage 0X0000(0V),

• The total insulation resistance 0X0258 (600KΩ),
• The positive insulation resistance 0XEA60 (infinite),
• The negative insulation resistance 0X0258 (600KΩ).

Sample 2
Read IO status

Host inquiry:
01 03 00 1B 00 01 F4 0D
Slave response:
01 03 02 00 06 38 46

Means that: the insulation monitoring is starting (the grounding relay is closed), and the insulation resistance monitoring is valid.

Write Command (Function x 06)

Sample 1
Turn on insulation monitoring:

Host inquiry:
01 06 01 02 00 11 E9 FA
Slave response:
01 06 02 00 11 78 84

Sample 2
Turn off insulation monitoring:

Host inquiry:
01 06 01 02 00 00 29 F6
Slave response:
01 06 02 00 00 B8 88

Register Map

multiplier 0.1

0x0012

| ****

Insulation resistance of DC+ to Ground

| ****

Unit KΩ，Take an integer

0x0013

| ****

Insulation resistance of DC- to Ground

| ****

Unit KΩ，Take an integer

0x001B

| ****

IO Status

| ****

Bit1: Whether the insulation resistance monitoring function is effective. (1-effective, 0-ineffective).

Bit2: Whether the insulation monitoring is turn on and the ground switch is closed. (1- on, 0- off).

0x0102

| Insulation monitoring control| Turn on insulation monitoring function

Insulation monitoring control

| Turn off insulation monitoring function

0x0103

| ****

Insulation monitoring control

| Turn on self-test function
Turn off self-test function

MODEL SELECTION SHEET

GYDCG- UBCW2K Series

GYDCG- UBCW 2K- RSA

| Alarm dry contact output + RS485 communication

GYDCG- UBCW 2K- RS

| ****

RS485 communication

GYDCG- UBCW 2K- A

| ****

Relay alarm output

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 GYDCG-UBCW2K Series 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.
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
Email: tech@cqbluejay.com
www.cqbluejay.com
Add: 1802, Building 2, No.88, Jianxin East Road, Chongqing, 400020, China.

Documents / Resources

| BLUE JAY UBCW2K-Series DC Protection Relay [pdf] User Manual
UBCW2K-Series DC Protection Relay, UBCW2K-Series, DC Protection Relay, Protection Relay
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References

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

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