Vector Type Fault Selective Equipment

 

 

At AC electrified section, this equipment takes advantage of the difference of the current changes between the load current of rolling stocks and the fault current caused by a short circuit or a ground fault of feeder and so on, and opens a circuit breaker only when it detects a fault current that may cause a fire of rolling stocks and so forth.
This equipment and Fault Selective Relay for AC Feeder (explained next) judges the fault current from the load current by detecting AC fundamental wave or Second and Third higher harmonic waves in the fundamental wave.
In addition, this Vector type detects the difference of phase angles between the load current and the fault current, and executes the vector computation besides the scalar computation; as a result, it realizes much better protection of AC electrified section with higher accuracy.

 

 

Type

AF-M16 (Relay unit)

Over Current Element Detection

Second Higher Harmonic Wave Deterrent

Second Higher Harmonic Wave Restraint

Third Higher Harmonic Wave Restraint

Construction

Panel Mounting Type
(Relay unit)

Accuracy

5%

Power Supply

DC 100V

Rating

AC 110V, 5A, 50Hz/60Hz

Japan Patent No: 2866767

AF-M16 type(Relay unit)

 

 

Fault Selective Relay for AC Feeder

 

 

Type

AF-5

AF-6

AF-8

Over Current Element Detection

 

Second Higher Harmonic Wave Deterrent

Second Higher Harmonic Wave Restraint

 

 

Third Higher Harmonic Wave Restraint

Construction

Panel Mounting Type

Accuracy

5%

Power Supply

DC 100V

Rating

AC 5A, 50Hz/60Hz

Japan Patent No: 1129749

 

AF-6B type

 

 

 

 

 

Protective Relay for Changeover Switch (for Shinkansen)

 

 

Shinkansen (bullet train) is a single-phase AC feeding system; and power supplies of different phases meet at substations or sectioning posts. In order for Shinkansen to make power running (high speed running) there, there is a power supply changeover section (approx. for 1km), where a changeover switch changes a power supply to the other power supply of a train running direction sequentially. If a vacuum switch used as the changeover switch flashovers, the power supply to substations is cut off without specifying the fault point, which causes a serious disruption for Shinkansen running with high speed.
This protective relay detects electrical breakdown of changeover switch, which was co-developed with Railway Technical Research Institute.

 

 

Type

AF-M11

AF-M12

Call Check

 

Detecting Current

0.1A - 5A

Construction

Panel Mounting Type

Power Supply

DC 100V

Rating

AC 5A, 50Hz/60Hz

 

 

AF-M12 type

 

 

 

 

 

Fault Locator

 

 

When a short circuit or a ground fault occurs on feeders, the location where the fault occurred (fault point) should be specified as soon as possible for an early recovery from the fault. This equipment locates a fault point on the Shinkansen AT system AC feeder circuit by measuring AT neutral point boost up current, and transmits the data to CC (central control center).
Also, we offer another locator of FT judging type that determines whether the fault occurred at a feeder line or trolley line. This type contributes to a much earlier recovery from the fault.
Japan Patent No: H10-31387 (under filing application)
We also offer reactance detecting method type locators for BT system AC feeder circuit and for coaxial cable traction circuit as well as the above-explained locator for Shinkansen AT system AC feeder circuit
In addition, we supply locators for signal high voltage distribution line that specifys a fault point when a short circuit or ground fault occurs on high voltage distribution lines.

Japan Patent Nos:

766906 (Fault Locator for BT system AC feeder circuit)
1840210, 1840211, 1940914, 198614, H11-182631 (under filing application) (Fault Locator for High Voltage Distribution Line)

 

 

LA-M3 type

 

 

Fault Locator for Shinkansen

 

 

Type

LA-M3

LA-ML

FT Judgment

 

Call Check

 

Accuracy

2%

Construction

Panel Mounting type

Power Supply

DC 100V

 

 

Fault Locator for BT system AC feeder circuit

 

 

Type

LX-M9

Accuracy

2%

Construction

Panel Mounting type

Power Supply

DC 100V

 

 

Fault Locator for Signal High Voltage Distribution Line

 

 

Type

LS-M6

Accuracy

2%

Construction

Panel Mounting type

Power Supply

AC 200V, DC 100V