GYDCG-UBCS1 Monitoring Relay Blue Jay User Manual

GYDCG-UBCS1 Monitoring Relay Blue Jay

Specifications

• Product Name: GYDCG-UBCS1 Series DC Insulation Monitor
• Version: 1.0
• Manufacturer: BlueJay Co., Ltd.
• Tel: +0086-023-67628702
• Website: www.cqbluejay.com
• Address: 1802, Building 2, No.88, Jianxin East Road, Chongqing, 400020, China

Product Usage Instructions

When using the GYDCG-UBCS1 Series DC Insulation Monitor, it is crucial to follow the user manual instructions carefully for proper operation and troubleshooting.

Technical Parameters

Refer to the user manual for detailed technical specifications and parameters of the GYDCG-UBCS1 Series DC Insulation Monitor.

1. Before turning on the power supply, ensure that the power supply meets the instrument’s requirements.
2. During installation, keep the current input terminal non-open and voltage input terminals non-short-circuited.
3. Avoid applying high pressure on the communication terminal (RS485).
4. Check that the instrument wiring matches the internal system settings.
5. For communication with a PC, ensure that the instrument communication parameters match those of the PC.

FAQ

• Q: What should I do if the device does not power on?
• A: Check the power supply and ensure it meets the instrument’s requirements. Verify all connections and wiring.
• Q: How can I reset the communication parameters for PC connection?
• A: Refer to the user manual for instructions on resetting communication parameters to match those of the PC.

Read me
When you use GYDCG-UBCS1 Series, be sure to read this user manual carefully, and be able to fully understand the implications, and the correct guidance of operations per user manual, which will help you make better use of GYDCG-UBCS1 Series, and help to solve the various problems at the scene.

1. Before turning on the power supply, be sure that the power supply is within the provisions of the instrument;
2. When installation, the current input terminal must be non-open, voltage input terminals must be Non-short circuit;
3. The communication terminal (RS485) is strictly prohibited from imposing high pressure;
4. Be sure the instrument wiring is 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

GYDCG-UBCS1 Series is a DC insulation monitoring device based on MODBUS protocol, including DC-to-ground insulation impedance monitoring, DC voltage monitoring, DC voltage reverse connection alarm and other safety monitoring functions. It can be used for electric vehicles DC charging systems, photovoltaic systems, energy storage systems, DC grid and other DC systems below 1 OOOV. This product has the function of starting and stopping insulation monitoring. After insulation monitoring is started, the insulation resistance of positive and negative poles to the ground can be monitored in real-time. The monitoring result is not affected by DC voltage fluctuation and is not affected by the symmetry of insulation resistance of positive and negative poles.
Insulation monitoring function introduction
The product can send communication frames through RS485 to turn on or off the insulation monitoring function. After the insulation monitoring function is turned on, the high-voltage grounding switch K is closed and the real-time measurement of insulation resistance is realized. After the insulation monitoring function is turned off, the high-voltage grounding switch K is disconnected. The host machine can send a read command to read the insulation resistance value of positive and negative poles at any time.

• The insulation resistance monitoring can be realized only when the DC voltage is between 1 OOV and 1 OV. If the insulation monitoring is off, or the DC voltage is less than 1 OOV or just opened for a short time, the value of Bit1 of Ox001 B is 0, then the read insulation resistance is 65535, namely OxFFFF (invalid value). Only when the Bit1 value of Ox001 B is 1, the read insulation resistance is an effective value. The monitoring range of insulation resistance is between 1 kO and 1 OMO. When the measured value is greater than 1 OMO, the received value is 60000, namely OxEA60 (infinity value).
• The user can turn the insulation monitoring on and off by writing the Ox0102 register and can determine whether the current insulation monitoring is on or off by reading the Bit2 of the Ox001 B register. The opening and closing of insulation monitoring only determines whether the insulation resistance monitoring is enabled, and does not affect the DC voltage monitoring. After the product is powered, the DC voltage is continuously monitored.
• After the insulation monitoring function is enabled, the product continuously monitors the insulation resistance in real-time. The user can read the insulation resistance value at the earliest 1 s after the function is enabled. For the presence of DC ground capacitance, the module can adaptively monitor the ground capacitance below 3uF (the positive and negative ground capacitance are respectively below 3uF, and the total capacitance is below 6uF). When the ground capacitance exists, the monitoring time is less than 2.5s.

FEATURES

• Widely power supply range
• Widely insulation monitoring range (100V~1 000VDC)
• 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

TECHNICAL PARAMETERS

Basic parameters

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. Cv Refers to the positive and negative Y capacitance values of the system bus to the ground.

Other parameters

Pressure point

|

Maximum voltage rating

|

Time

---|---|---
DC+/DC- To GND| 4200VDC/3000VAC| 1min
Power supply +/- To GND| 3500VDC/2500VAC| 1min
RS485 A/B To GND| 3500VDC/2500VAC| 1min
DC+/DC- To Power supply +/-| 3500VDC/2000VAC| 1min
DC+/DC- TO A/B| 3500VDC/2000VAC| 1min

Note
The power supply side(+/-), RS485(A/B), and Ground(G) should be isolated from each other

INSTALLATION AND STAR-UP

Mounting
GYDCG-UBCS1 Series module can be installed by rail or screw. Guide rails use a standard width of 35mm. Overall dimensions are shown in Figure 1 below: (Unit: mm)

• Dimensions: LWH (mm) 122.57540

Connection Terminal

DC interface

D-| ****

Negative pole of DC

A| RS485-A|
B| RS485-B|
+| Positive pole of power supply| ****

9-30VDC

–

| Negative pole of power supply
GND| Grounding point|

The LED display
After the module is powered on, the PWR indicator is on.

‘LD1’ light flashing logic

insulation monitoring function is ON, and the self-check function is OFF|

‘LD1 lights Normally ON

insulation monitoring function is OFF, and the self-check function is OFF| ‘LD1’ is ON for 1.5 seconds and OFF for 0.5 seconds
Insulation monitoring function is OFF, the self-check function is ON| ‘LD1’ is OFF for 0.5 seconds and OFF for 1.5 seconds
insulation monitoring function is OFF, and the self-test function is OFF|

‘LD1 lights Normally OFF

Insulation monitoring self-test function (Optional, model with ‘-ST’)

• The function of insulation monitoring self-test is to test whether the equipment can work normally by self-switching the grounding resistance inside the device.
• If the device can detect the grounding resistance, it means that the insulation monitoring function can work normally, that is, self-test success;
• If the device cannot detect the switch resistance, it means that the insulation monitoring function cannot work normally, that is, the self-test fails.

• The self-checking circuit and the insulation monitoring circuit are independent and do not affect each other.
• When the user opens the self-test circuit, the self-test switches K1 and K2 are closed, and the positive and negative self-test resistance Rtest is set as 470kO here; When the user closes the self­test circuit, the self-test switches K1 and K2 are disconnected.
• When the user opens the insulation monitoring circuit, the ground switch K is closed and the insulation monitoring starts to work. When the user closes the insulation monitoring circuit, the ground switch K will be disconnected and the insulation monitoring will stop working.

Self-test function conditions

1. Turn on the insulation monitoring circuit (send 01 06 01 02 00 11 E9 FA);
2. Turn on the self-test circuit (send 01 06 01 03 00 13 39 FB);
3. DC voltage above 1 00V (the greater the DC voltage, the more accurate result).

Note
At this time, ‘LD1’ is ON for 1.5 seconds and OFF for 0.5 seconds.
The insulation monitoring circuit and self-test circuit are both ON, and the self-test function is ON.
View self-test results
You can view the result 3S after the above three conditions are ON. You can view the self-test result by either of the following methods (the second method is recommended):

1. Check by reading the insulation resistance value. Register addresses 0x0012 and 0x0013 are the positive and negative insulation resistance to earth respectively. If the open self-checking circuit is negative in front of the insulation resistance of Rf2 respectively and Rf1, the self-checking circuit open across the electrodes of 3 seconds after reading across the electrodes of insulation resistance should be opened before the self-checking circuit insulation resistance and resistance of self-check R1es1 parallel values, namely, Rf2 II Rtest and Rr1 II Rtest, if the read value and time value were similar, that means the self-test passed.
2. Check whether the self-test passes by reading the Bit4 bits of the register address 0x0018.
   If Bit4=1, the self-check passes.
   If Bit4=0, the self-check fails. When the self-check function is turned off, the Bit4 bit is 0. In this case, the Bit4 bit should not be read.

Possible causes of self-test failure
After passing the self-test, you can close the self-test function; If the self-test fails, the possible causes are:

1. The insulation monitoring is not ON
2. The self-test circuit is not ON
3. The DC voltage is below 100V
4. The waiting time after starting is too short, you can wait for another 3 seconds to read the self­ test result
5. The insulation monitoring function is faulty.

COMMUNICATION INTERFACE

Connection for RS485
Users can send and receive data frames through the RS485 communication port. The circuit is equipped with 5100 terminal resistance. For details, see 6 Communication Protocol. Terminals A and B correspond to RS485 outputs A and B respectively.
Communication Parameter configuration bit
Dip switch 1 bit is used to set the baud rate, 2 to 4 bits are used to set the communication address, and 5,6 bits are used to set the parity check. The setting mode is shown below.

Communication Protocol
GYDCG-UBCS1 Series provides Modbus RTU protocol interface, using Modbus RTU 0x03/0x06 command; Baud rate, communication address, parity check mode, can be set by DIP switch, stop bit 1, data bit 8. The interval between each byte in the sent frame must not exceed 20; 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:
• 010308 13 88 02 58 EA 60 02 58 C8 75
• Notes:
• Read the DC voltage 0X1388(500V),
• The total insulation resistance 0X0258 (600KO),
• The positive insulation resistance 0XEA60 (infinite),
• The negative insulation resistance is 0X0258 (600KO) .

Sample 2

• Read 10 status
• Host inquiry:
• 01 03 00 1 B 00 01 F4 OD
• Slave response:
• 010302 00 84 B8 27
• Means that: the bus voltage reverse connection, insulation monitoring is ON (ground relay is OFF), and insulation resistance monitoring is OFF.
• 01 03 02 00 06 38 46
• Means that: no reverse connection of bus voltage, insulation monitoring is ON (ground relay is OFF), and insulation resistance monitoring is ON.
• 010302 00 0C B8 41
• Means that: the self-test circuit is ON (self-test relays K1 and K2 are OFF), but the self-test fails because the insulation monitoring circuit is OFF.
• 010302 00 1E 38 4C
• Means that: the self-test circuit and insulation monitoring circuit is ON, the insulation resistance monitoring is effective, and the self-test is passed.

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

Unit KO, Take an integer

0x0013| Insulation resistance of DC- to Ground| ****

Unit KO, Take an integer

0x001B| 10 Status| ****

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

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

Bit3: Whether the self-test function is turned on and whether the self-test relay is closed (1- on, 0- off).

Bit4: If the self-test is passed, set it to 1. If the self-test is not passed, set it to 0. If the self-test function is disabled, the default value is 0.

Bit?: Bus voltage reverse connection alarm (When the reverse connection voltage is above 100V, set 1)

0x0102| ****

Insulation monitoring control

| Turn on insulation monitoring function

Insulation monitoring control

| ****

Turn off the insulation monitoring function

0x0103| self-test control| Turn on the self-test function
self-test control| Turn off the self-test function
Ox 66| ****

The host reads the slave’s address

| Example of reply from the slave 0xFF 0x66 0x01 0xAB 0x90

The slave machine address is 0x01

MODEL SELECTION SHEET

GYDCG-UBCS1 Series

GYDCG-UBCS1| ****

Single-circuit insulation monitoring DC voltage detection

GYDCG-UBCS1- ST| ****

Single-circuit insulation monitoring DC voltage detection

insulation monitoring self-test

SAFETY CONSIDERATIONS

All installation specifications described in the previous chapters are 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
• Any operation of the device, you must cut off the input signal and power;

MAINTENANCE

• The GYDCG-UBCS1 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 be 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.

CONTACT

• 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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