BLUE JAY UB1K DC Insulation Monitor User Manual

GYDCG-UB1K-ARH
DC Insulation Monitor
User Manual Version：1.0

UB1K DC Insulation Monitor

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When you use GYDCG-UB1K-ARH, 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-UB1K-ARH, 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.

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SUMMARIZE

GYDCG-UB1K-ARH 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 00 to 1 OMO; at the same time, it can also detect the DC voltage value, ranging from OV to 1 OOOV.
The user can obtain the measurement value through RS485 communication, and can set the alarm resistance threshold through the DIP switch or RS485 communication. When the insulation resistance is less than this value, the fault  relay operates and the L2 indicator light is on. At the same time, passive reset and automatic reset can also be selected through the configuration bit of the DIP switch, and the module stops working at the same time as manual or remote  reset.
GYDCG-UB1 K-ARH is equipped with a high-voltage grounding switch (switch K in the picture), which can realize the online on-off function, that is, when the module is powered off, reset, and stops working, its high-voltage switch to the  ground is disconnected, and it is completely separated from the ground. The DC-to-ground high voltage test is not higher than 4200Vdc.

FEATURES

• High voltage grounding switch
• Widely power supply range
• Widely insulation monitoring range (100V-1000VDC)
• 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

1.1 – Working method introduction
The insulation monitoring module can be in “working” mode or “stop working” mode.

“Working” mode| the insulation resistance is continuously monitored in real time, the alarm function is activated, the ground  switch is closed, and the ‘L 1’ light is on
---|---
“Stop working” mode| the insulation resistance is not monitored, the alarm function stops, the ground switch is disconnected, and the ‘L 1’ light is off;

Notes:

1. When the module is powered on, it defaults to “working” mode.
2. Whether in “working” mode or “stop working” mode, the DC voltage can also be detected.

The methods switch to “stop working” mode:

1. Short-connection the ‘R’ port and the ‘S’ port
2. Set bit5 of 02H to ‘1’ by sending a communication frame. After the ‘R’ port is disconnected from the ‘S’ port, or the bit5 of 02H is set to ‘O’ by sending a communication frame, it can return to the “working” mode.
   Note: The short connection between the ‘R’ port and the ‘S’ port needs to be electrically isolated, such as a button or a relay is closed to realize the short connection.

1.2.- Fault alarm function introduction
1.2.1 – Fault alarm and reset method
This product can be set in two modes of “Auto Reset” or “Passive Reset” through the 6th bit of the dial switch. 0: Auto Reset 1: Passive Reset
When the monitored insulation resistance value is < the alarm value, the module alarms. At this time, the fault relay coil is OFF, the corresponding NO dry contact is OFF, the NC dry contact is disconnected, and the ‘L2’ indicator light is ON.
If it is set to “Auto Reset” mode, the relay and indicator light ‘L2’ will automatically reset when the fault is recovered; If set to “Passive Reset” mode, user needs stop the insulation monitoring work to reset the fault relay and indicator light ‘L2’.
Methods to stop insulation monitoring include:
(1) Short-connected the ‘R’ port and ‘S’ port
(2) Set the bit5 position of 02H to ‘1’ by sending a communication frame.

1.2.2 • Insulation resistance alarm threshold setting
The insulation resistance alarm threshold can be set through the 1-5 digits of the DIP switch, the 1-4 digits are the setting value, and the 5 digit is the setting multiplier.
Example: If the setting value is 15 and the multiplier is 10, the set alarm value is 150KO.
When all digits 1-4 are set to ‘O’, the internal alarm value will be used. The internal alarm value can only be set by rewriting the value of O?H through RS485 communication. default is OKO. The internal alarm value set by the communication is stored in the flash, and it will not be erased when the power is turned off.

TECHNICAL PARAMETERS

Basic parameters

DC voltage
measurement accuracy| S2V+0.3%
Insulation resistance
measurement range| 1K0-10 MO
(DC System voltage: 1 OOV-1 OOOV)
Insulation monitoring accuracy
((When :DC voltage:100V-1000V)| Cv range  Resistance range  Accuracy
0-0.8µF
S60k0 ::,3kΩ
60kΩ<R:51 MΩ :55%
0.8µF -3µF
S60kΩ :56kΩ
60kΩ<R:51MΩ :520%
Off-line pressure test| <2mA
Maximum relay switching voltage| 250VAC/30VDC
Maximum relay switching current| 3A
Relay contact resistance| <100m0
Relay insulation resistance| 100MO
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. Cv Refers to the positive and negative Y capacitance values of the system bus to ground respectively.

Other parameters

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

INSTALLATION AND STAR UP

3.1. – Mounting
GYDCG-UB1 K-ARH module can be installed by rail or screw. Guide rails use standard width of 35mm. Overall dimensions are shown in Figure 1 below: (Unit: mm)
Dimensions: LWH (mm) 984962

3.2. – Wiring Method
The wiring diagram is shown in the below. Realize remote reset with switch, short circuit current 0.25mA, direction R->S.

NO contact is closed
NC contact is disconnected.
X| NO contact
Y| NC contact

RS485 output port internal circuit

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

monitored in real time, the alarm  function is activated, and the ground switch is closed.
L1 “OFF”| “Stop working” mode
the insulation resistance is not monitored, the alarm function is stopped, and the grounding switch is disconnected.
L2 “ON”| When the monitored insulation resistance value is less than the alarm value, the module alarms.
the coil of the fault relay is closed, the corresponding normally open dry contact is closed the normally closed dry contact is disconnected.

COMMUNICATION INTERFACE

4.1. – Connection for RS485
Users can send and receive data frames through the RS485 communication port. For details, see chapter of communication protocol. Terminals A and B correspond to RS485 outputs A and B respectively.
4.2. – Communication Protocol
GYDCG-UB1K-ARH adopt custom protocol, initial address: 10H, initial baud rate: 9600bps, parity: none, stop bit 1, data bit 8.
4.2.1 – Data address

Function| Item| Rated value range| Unit| Byte mode| Read-Write attribute
---|---|---|---|---|---
02H| Communication address + Alarm work
Control /query +Fault code| 0-65535| | int| R/VV
03H| DC voltage| 0-1023| V| int| R
04H| Positive Grounding Resistance| 0-65535| kO| int|  R
05H| Negative Grounding
Resistance| 0-65535| k0| int| R
07H| Internal Alarm
Resistor Threshold| 0-10000| kO| int| W

4.2.2 • Detailed definition

02H Read/Write|
---|---
Bit15-Bit8| Communication address
Bit7-Bit6| Null
Work status control
Bit5(R)| O= Enter the working mode (insulation resistance monitoring, alarm function ON, light L 1 ON)
1 = Enter the stop working mode (stop the insulation resistance monitoring, the alarm function is OFF, light  L 1 OFF) Work status inquiry
Bit4(R)| O= working normally
1 = stop working
Negative pole to ground insulation alarm sign
Bit3(R)| 1 =Negative to ground insulation alarm (negative grounding resistance < set
threshold)
O=No fault
Positive pole-to-ground insulation alarm sign
Bit2(R)| 1 =Positive pole to ground insulation alarm (positive pole grounding resistance
< set threshold value)
O=No fault
Bit1 (R)| Null
Bito(R)| Null
03H Read|
Bit15-Bit0| DC voltage value: OV-1 OOOV
04H Read|
Bit15-Bit0| Positive grounding resistor resistance. The range is 1 kΩ-1 OMΩ.
If the read data is OXEA 60 (60000), it means that the positive grounding resistance is infinite. If it is greater than 1 OMΩ, it will display 60000.
OSH Read|
Bit15-Bit0| Negative ground resistance. The range is 1 kΩ-1 OMΩ.
If the read data is OXEA 60 (60000), it means that the negative grounding resistance is infinite. If it is greater than 1 OMΩ, it will display 60000.
07H Write|
Bit15-Bit0| Set the internal alarm resistor threshold. Range 00-1 OOOOkΩ

4.3 – Command samples
4.3.1 – Read Command
Sample 1
Host inquiry:
10 01 02 03 04 05 CRC CRC
Slave response:
10 04 01 C4 00 31 EA 60 EA 40
Notes:
02H Data=OX1004, Mean: the communication address is 10H, and there is a fault between the positive pole and the ground.
03H Data=OX01 C4=500, Mean: the DC voltage is 452V.
04H Data=OX0031 =49, Mean: the positive grounding resistance is 19KO
05H Data=OXEA60=60000, Mean: the resistance of the negative grounding resistance is infinite

4.3.2 -Write Command
Sample 1
Turn on “work” mode
Host inquiry:
10 02 00 02 10 00 07 48
NO slave response
Sample 2
Turn on “Stop work” mode
Host inquiry:
10 02 00 02 10 20 06 93
NO slave response
Sample 3 Set the internal alarm threshold to 1 OOKO
Host inquiry:
10 02 00 07 00 64 CB 61
NO slave response

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-UB1 K-ARH 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
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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