• Phone: +91-120-3356101
  • info@sindia.co.in
STRING MONITORING UNIT:

In solar farms string of solar panel generates DC current which flows through strings in combiner box. The current from strings is combined and fed through isolator to inverter. To check that solar array is operating at peak capacity, the current in each string is monitored in the combiner box, before it is combined. If any panel is damaged or need cleaning or any other type of maintenance the current output drops. The string monitor detects this change and indicates panels if particular string needs attention. This way system repair and maintenance becomes easy lowering operating cost of system.
These are available in 12, 16, 18, 24 strings. Input connection is through pluggable connector / through glands onto the terminals.

  • Monitoring of upto 24 Strings through Hall Sensor.
  • hunt based systems are also available.
  • Can be customized as per user’s requirements.
  • Open to manufacture under your brand name.
  • No need of special communication cable.
  • Excellent performance upto 55°C of temperature.
  • MC4/ gland at input, SPD type I, I+II at output all customizable.
  • Monitoring of string current, bus voltage, cabinet SPD status, S/W status.
  • Configurable analog/digital inputs & outputs.
  • MODBUS over RS 485 communication

INTELLIGENT STRING MONITOR

TECHNICAL DETAILS OF 1000VDC SYSTEM

Parameters 24 Channel SMB
Electrical Values
DC Input string voltage range 450-1000V
Absolute Max. DC Input String Voltage range 1100V
Max. Isc Current for Each Channel 18.0A Max.
Max. No. of Input Strings 24
Current Accuracy ±1% Upper range value
Reverse Protection Optional
Output Side
Max. Output Current range 300A
High Voltage Protection Yes
Ground Cable connection M25 (upto 25mm²)
Output DC Switch Rating Upto 400A/1000V DC
Man-O/p cable termination For upto 240mm sq. cable
Communication
User interface Via RS485 (MODBUS RTU Protocol)
Control supply Control supply (Self Power from 1000V DC or 230VAC)
Configurable Input/ Output Channels
Digital input Provided (1 No.)
Analog Input Provided (2 Nos.)
Digital Output Provided (2 Nos.)
Data Monitoring
Bus voltage Yes
String current Yes
Ambient temperature Yes
Over voltage status Yes
Provision for environmental sensors Yes
Shunt trip status Yes (optional)
Climatic Values
Ambient Temperature Range (-10°C to 55°C)
Relative Humidity 95% Condensing
Max. Operating Altitude without Derating 1000m above MSL
Environmental Protection Rating IP65
Mechanical
Enclosure Poly carbonate

INTELLIGENT STRING MONITOR

TECHNICAL DETAILS OF 1500VDC SYSTEM

Parameters 24 Channel SMB
Electrical Values
DC Input string voltage range 1300V
Absolute Max. DC Input String Voltage 1500V
Max. Isc Current for Each Channel 9A-18A Max.
No. of Input Strings 8 TO 2Ch.
Current Accuracy ±1% Upper range value
Reverse Protection Optional
Output Side
Max. Output Current 300A
High Voltage Protection Yes
Ground Cable connection M25 (upto 25mm²)
Output DC Switch Rating Upto 400A/1500V DC
Man-O/p cable termination For upto 240mm sq. cable
Communication
User interface Via RS485 (MODBUS RTU Protocol)
Control supply Control supply (Self Power from 1500V DC or 230VAC)
Configurable Input/ Output Channels
Digital input Provided (1 No.)
Analog Input Provided (2 Nos.)
Digital Output Provided (2 Nos.)
Data Monitoring
Bus voltage Yes
String current Yes
Ambient temperature Yes
Over voltage status Yes
Provision for environmental sensors Yes
Shunt trip status Yes (optional)
Climatic Values
Ambient Temperature Range (-10°C to 55°C)
Relative Humidity 95% Condensing
Max. Operating Altitude without Derating 1000m above MSL
Environmental Protection Rating IP65
Mechanical
Enclosure Poly carbonate