BLUE JAY UBCW2K Series DC Insulation Monitor User Manual
- June 1, 2024
- BLUE JAY
Table of Contents
BLUE JAY UBCW2K Series DC Insulation Monitor
Read me
When you use the GYDCG-UBCW2K- Series, be sure to read this user manual
carefully, and be able to fully understand the implications, and the correct
guidance of operations under the user manual, which will help you make better
use of the GYDCG-UBCW2K- Series, and help to solve the various problems at the
scene.
- Before turning on the power supply, be sure that the power supply is within the provisions of the instrument;
- When installation, the current input terminal must be non-open, voltage input terminals must be Non-short circuit;
- The communication terminal (RS485) is strictly prohibited from imposing high pressure;
- Be sure the instrument wiring is consistent with the internal system settings;
- 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
GYDCG-UBCW2K series is a DC-to-ground insulation monitoring module based on the principle of the 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 bet1Neen 1 00V and 2000V. When the DC voltage is less than 1 00V, 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 po1Ner 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 powered on, the “L 1” light is on, and when the insulation monitoring is powered off, the “L 1” 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
“.
- In 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 ‘DO+’ and ‘DO-‘ terminals are closed. Users can
connect the DO+ terminal and DO- 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
Notes:
- 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.
- 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 a
standard width of 35mm. Overall dimensions are shown below: (Unit: mm)
Wiring Method
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 a Modbus RTU protocol interface, using Modbus RTU
0x03/0x06 command; baud rate, and 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 20 ms, otherwise, the frame will be cleared.
This module works in slave mode.
Modbus RTU Frame Format:
MODBUS FUNCTIONS:
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 is 0X0258 (600KΩ).
Sample 2
Read IO status
-
Host inquiry:
01 03 00 1 B 00 01 F4 OD -
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:
01060200 1178 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
MODEL SELECTION SHEET
SAFETY CONSIDERATIONS
All installation specifications described in 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 touch 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 professional installation and maintenance
- For any operation of the device, you must cut off the input signal and power;
MAINTENANCE
- The GYDCG-UBCW2 K Series does not require any special maintenance. No adjustment, maintenance or repair 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 repair 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’s performance or any failure, contact 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.