Information Measuring Equipment
This system measures and records the load information, fault
information, and maintenance information of the feeder lines inthe substations for DC electric railways.
In case of short circuit or ground fault, the system is equippedwith a fault locating function to locate the fault point.
The measured information can be transmitted to the remote control
unit for confirmation, and can also be transferred to a USB memory
stick for confirmation, charting, drawing, and printing on a PC.

Operationcontrol centerGPS
antenna

disconnect
device75P
parallelinterface

DC bus bar
Communication
unitgeneralcurrent

information
measuring device

Remoteterminal
unit

power supply(section)

Ethernet
LANbus bar
voltage

Tsuda Electric Instrument Co.

electriccurrent(Max. 5 lines)

Information
measuring deviceUSB
memorystick

Playback
software (PC)

INPUT SIGNAL
50F operation signal
54F operation signal
64P operation signal
Compressor operation signal

Purpose and role of the device
The information measurement equipment measures and records the load information,
fault information, and maintenance information of feeder lines at DC substations.
The system is also equipped with a fault point identification function that locates the fault point
when a feeder line fault occurs.
This system uses a touch panel with an 8.4-inch color LCD screen for information display, which
greatly improves the information display function on this system compared to previous models.
In addition, the measured information can be transmitted to the remote control unit for
confirmation, and can also be transferred to a USB memory for confirmation, tabulation, drawing,
and printing on a PC.

Information display function
Current values can be displayed for all five feeder lines, the total current, and the bus bar voltage,
and the load status of the substation can be checked on a single screen.
Through the load information report display function and load graph display function, you cancheck the recent status.
Fault waveforms and wear evaluation values of circuit breakers can be displayed.
The results of constant monitoring of the equipment can be checked on the screen, and evenwhen an abnormality occurs, the location of the abnormality happened can be detected.

Duplication of power supply
Since the power supply for the device is designed to be duplicated, the measurement function of
the device is maintained even if an error occurs in one of the power supplies.
When an abnormality occurs on one of the power supply for the equipment, the power supply
abnormality indication output is shown and the indicator light of the equipment lights up.

Equipment Compatibility
Since the panel cutting dimensions are the same as those of conventional machines, it is easy toupdate the equipment.

Measurement and recording of information at substations
Measure and record substation load, fault, and maintenance information

High resolution of fault current measurement
10 times higher resolution of fault current measurement than conventional equipment(100A→10A)

Fault Point Locator
Capable of identifying fault points in DC feeder circuits

Color LCD touch panel
Color LCD touch panel for easy operationInformation Transmission to Remote Terminal Unit
Transmission of various types of recorded information to a remote terminal unit ispossible.

Checking and Editing Recorded Information
Recorded information can be carried out by USB
Easy to check and edit recorded information by using playback software (PC software)
MDE-11L-E
MDE-12L-E
type
MDE-11L-P
MDE-12L-P
Bus line summary (load information): 1 line
Number of lines
Power line (load/fault information): Max. 5 lines
Conservation information (compressor) : 2 lines
Information
Load and maintenance information: 3 months (current month and past 2recordingmonths)transfer function
Fault information: Fault waveforms for 30 seconds, up to 10 times
Failureinformation
1mssampling
Failure point
Error ±2.0% (for substation spacing of 5.0km to 15.0km)
determination
Error ±0.1km (for substation spacing less than 5.0km)
Display function
TFT 8.4 inch touch panel display
Transmission
MDE-□-E : Ethernet LAN
methodMDE-□-P : 75P parallel interface
Deviceintegrated typeseparate type
Control power
DC100V/110V (variation range DC80 to 132V)
supplyMeasurement unit
H249mm x W341mm x D332.3mm
Approx. 12kg
Dimensions/
H245mm x W600mm x D338mm
WeightAbout 20kg
Power supply and communication
section
H147mm x W341mm x D319.3mm
Approx. 8.1kg

MDE-11L-E