Citel LSCM-D User manual
User Manual
Smart SPD Monitoring Device
Surge Current Counter
LSCM-D
N210201 - This document could be modified without notice. Update available on website.
France
Head Office
Sales department
Sèvres, France
Tel: +33 1 42 23 50 23
e-mail: [email protected]
Web: www.citel.fr
Shanghai · China
Tel: +86 21 5812 2525
e-mail: [email protected]
Web：www.citel.cn
Address：No.88,Shangke Road,
Zhangjiang Hi-Tech Park, Pudong,
Shanghai, China
1-1 Overview: LSCM-D
1-2 Main functions
1-3 Technology and features
1-3-1 Technology
1-3-2 Main features
2-1 Mechanical scheme
2-2 Interface introduction
2-2-1 Power supply
2-2-2 RS485 ports
2-2-3 Sensor
2-2-4 Alarm input
2-2-5 Alarm output
2-2-6 PE shield connection
2-3 Typical wiring diagram for LSCM-D
P1/6
Introduction
P7/10
Installation
SAFETY INSTRUCTIONS
- Installation must be performed only by electrically skilled operator.
- National electrical installation rules must be followed.
- The unit must be used only as surge current counter & SPD monitoring, according the
conditions described in this document.
4-1 Introduction
4-2 Read device information
4-3 Write device information
3-1 Main operator panel
3-2 Main operator interfaces
3-2-1 First page-basic information
3-2-2 Second page-switch status
3-2-3 Third page-surge current information
3-2-4 Fourth page-status information of the content system
3-3 System setting3-3-1 Setting introduction
3-3-2 First page-system settings
3-3-3 Second page-system settings
P11/17
OLED Instructions
P18/29
Modbus Protocol
1 - Introduction
1-1 Overview: LSCM-D
As we know, surge voltages caused by lightning strikes can lead to severe damages and destructions to power and signaling
networks, such as common buildings, new energy plant structures like wind turbines. SPDs (Surge Protective Devices) are currently
used to tackle this important threat.
The monitoring of the SPDs is critical point for 2 reasons :
• Estimating the surge stress applied to the SPDs, for prostective
maintenance (SPD replacement before failure) and possible
upgrade the surge protection strategy (increase the discharge
current of the installed SPD because too heavy or too frequent
surges). For this, the timing, location and current amplitude of the
surge events must be known.
• Knowing the status (operating/disconnected) of
Surge Protection Branch (SPD + associated discon-
nectors e.g.MCB, fuse ) and transmission on this
information remotely.
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LSCM-D User Manual
The Solution :
The smart monitoring and measuring device LSCM-D is designed for measuring the surge current which will flow in the Surge
protection branch and for indicating the the status of the SPD and and its associated disconnectors .
The product LSCM-D is composed of one sensor and one monitoring unit, detailed combinations are described as below table.
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LSCM-D User Manual
1-Introduction
12-24 Vdc/ac Power Supply
120-230 Vac Power Supply
300 A minimum surge detection
1000 A minimum surge detection
12-24 Vdc/ac Power Supply + 300 A minimum detection
120-230 Vac Power Supply + 300 A minimum detection
12-24 Vdc/ac Power Supply + 1000 A minimum detection
120-230 Vac Power Supply + 1000 A minimum detection
Type
LSCM-D/24
LSCM-D/230AC
LSCM-P300
LSCM-P1000
LSCM-D/24/P300
LSCM-D/230AC/P300
LSCM-D/24/P1000
LSCM-D/230AC/P1000
Description Version
Monitoring unit
Monitoring unit
Surge sensor
Surge sensor
Complete set: 1 monitoring unit+1 sensor
Complete set: 1 monitoring unit+1 sensor
Complete set: 1 monitoring unit+1 sensor
Complete set: 1 monitoring unit+1 sensor
1-2 Main functions
The main funcitons for LSCM-D described as below :
Lightning and surge current detection for wide detection
range :
- 0.3/25kA@10/350s or 0.3/50kA @ 8/20s(LSCM-P300)
- 1.0/50kA@10/350s or 1.0/100kA @ 8/20s(LSCM-P1000)
Front OLED display can read recorded events and device
parameters
Peak current and time stamping recording of the surge
events
RS485 communication interface/MODBUS protocol
Monitor connected devices: with two inputs and one
output switch signal, the status of SPD and/or backup
protection can be monitored.
Equipped with rechargeable 3 V battery, which can
keep the clock running in case of power loss, to ensure
the accuracy of recording time;
Equipped with an LED indicator light can indicate the
working status of the equipment.
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LSCM-D User Manual
1-Introduction
This measuring system utilizes Faraday effects to analyze the surge
currents which pass through conductors when discharge happens.
The measured electric signals caused by electromagnetic effects is
generated in the coil sensor, and will be transfered into differential
voltage signal to monitoring unit through sensor’s connection wire,
then the controlling unit proceed further back
calculation by microprocessor.
The data acquisition system for incoming surges
consists of signal conditioning circuit, DSK interfacing
circuit, RS-485 communication interfacing circuit,
system clock circuit, power supply circuit and so on.
System schematic diagram Fig 1.
1-3 Technology and features
1-3-1 Technology
Serial port convert
to RS485
Signal amplifier
RS485 COM Ports
Internal Flash
Memory:128KB
USART2
Differential ADC
signal acquisition SPI
DC-DC module
24Vdc/230Vac
power input
Program burn port
SWD
USART1
Internal SRAM:
packaging
Voltage signal
measured by sensor OLED display module
I2C
WIFI module
USART1
GPIO
Alarm input/output
GPIO
Key control
GPIO
LED status
REF signal
Sensor
Monitoring Unit
GPIO
Fig1. LSCM-D system schematic diagram
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LSCM-D User Manual
1-Introduction
1-3-2 Main features
Surge current detection
The peak value and polarity of surge currents flowing
conductors, including PE wires or down conductor, as well
as the time stamping for the event are recorded. Long
(10/350µs) and shorter (8/20µs) duration impulse currents
can be monitored with wide range (range described as 1 -2).
Monitor the state of the SPD and its associated discon-
nectors (operating/disconnected)
This information will send through the communication line
or will operate a contact (output port) to activate a LED
indicator, or a buzzer, or a contactor to cut down the main
circuit (Fig4).
With high precision
The accuracy rate for LSCM-D can declare within +/-5%. The
precision could reach better performance in low electromag-
netic interference conditions.
Wide operating voltage range
The power supply is equipped with rectifying bridge, which can
support DC and AC wide voltage range input, and applicable for
reverse wiring, two versions optional:
•DC power supply: 12-24Vdc/ac (DC:9Vdc min/36Vdc max;
AC:6Vac min/30Vac max)
• AC power supply: 120-230Vac (90Vac min/264Vac max)
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LSCM-D User Manual
1-Introduction
Information display and communication
•Local information: the front OLED display gives access
the recorded information (surge parameters, devices status)
•Remote signal communication: a remote computer,
through RS485 communication/Modbuis protocol to the
LSCM-D, can access to the full recorded data.
Higher immunity to interference
LSCM-D have passed strict tests on EMC and EMI, comply
with the standard requirements on IEC 61000 and CISPR.
Built-in battery for timer
To ensure the accuracy of recording timethe monitoring
device equipped with rechargeable 3V battery which can
keep the timer running in case of power loss the battery life
could reach 3-6 months.
Wide applicability
Based on the compact design and wide surge detection
range for 10/350s and 8/20s, LSCM-D typically can be
used for:
•Detect the surge current via SPD PE wire inside an
electrical cabinet
•Monitor the state of SPD and/or of its associated
disconnector (fuse/MCB)
•Detect the lightning current flowing PE wire from blade
to the hub in windturbine.
•Detect the direct lightning strike from LPS through down
conductor or grounding wire.
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LSCM-D User Manual
1-Introduction
This manual suits for next models
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Table of contents
