Sankosha Corporation

Sagamihara, Japan

Sankosha Corporation

Sagamihara, Japan

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Patent
Sankosha Corporation | Date: 2017-05-03

A surge protective device (SPD) (1) includes a jack (10) and a plug (30) detachably attached by insertion to the jack (10). Inside the plug (30), a protection circuit (34) which protects equipment to be protected against intruding lightning surge, a degradation detecting unit (40) which detects a degradation state of the protection circuit (34), a display unit (45) which displays the detection result, or the like, are provided. When a plurality of SPDs (1) are installed together, a juncture plug (25) which detachably connects between juncture terminals (15-1, 15-2) within the adjacent SPDs (1) is provided. The detection result of the degradation detecting unit (40) within the plug (30) is output to an outside through a third connection terminal (32) within the plug (30), a first connection terminal (16) and the juncture terminal (15-1, 15-2) within the jack (10) and the juncture plug (25).


Patent
Sankosha Corporation | Date: 2016-10-20

A surge protective device (SPD) includes a jack and a plug detachably attached by insertion to the jack. Inside the plug, a protection circuit which protects equipment to be protected against intruding lightning surge, a degradation detecting unit which detects a degradation state of the protection circuit, a display unit which displays the detection result, or the like, are provided. When a plurality of SPDs are installed together, a juncture plug which detachably connects between juncture terminals within the adjacent SPDs is provided. The detection result of the degradation detecting unit within the plug is output to an outside through a third connection terminal within the plug, a first connection terminal and the juncture terminal within the jack and the juncture plug.


Patent
Sankosha Corporation | Date: 2013-10-30

An isolator 10 is formed with an isolation transformer 13 that blocks an abnormal voltage entering from a communication line 30 and protects a protection target device 40. A pulse transformer 43 in the device 40 includes a primary winding 43a connected to a secondary winding 13b of the transformer 13 and a secondary winding 43b connected to an inner circuit. A medium tap of the primary winding 43a is grounded through an inner capacitance Ci of the device 40. A parasitic capacitance Cs between the primary winding 13a and the secondary winding 13b of the transformer 13 and the inner capacitance Ci are connected in series, an abnormal voltage is divided by the capacitance Cs and the capacitance Ci, and a capacitance value of the capacitance Cs is set such that the divided voltage of the capacitance Ci is equal to or below a predetermined value.


Patent
Sankosha Corporation | Date: 2013-04-11

An isolator 10 is formed with an isolation transformer 13 that blocks an abnormal voltage entering from a communication line 30 and protects a protection target device 40. A pulse transformer 43 in the device 40 includes a primary winding 43a connected to a secondary winding 13b of the transformer 13 and a secondary winding 43b connected to an inner circuit. A medium tap of the primary winding 43a is grounded through an inner capacitance Ci of the device 40. A parasitic capacitance Cs between the primary winding 13a and the secondary winding 13b of the transformer 13 and the inner capacitance Ci are connected in series, an abnormal voltage is divided by the capacitance Cs and the capacitance Ci, and a capacitance value of the capacitance Cs is set such that the divided voltage of the capacitance Ci is equal to or below a predetermined value.


A lightning surge detector (1) includes a first terminal unit (3) connected to a ground-side terminal unit of a surge protective device, a second terminal unit (4) connected with a ground wire, a conducting coupling bar (5) adapted to couple the first terminal unit (1) and the second terminal unit (4), a detection coil (7) placed in a vicinity of the conducting coupling bar (5) and adapted to detect a lightning surge current flowing through the conducting coupling bar (5), a waveform processing unit adapted to stretch a voltage waveform of the detected lightning surge current and thereby output a waveform-modified voltage, a computation control unit adapted to produce a calculation result of the lightning surge current from a voltage value of the waveform-modified voltage, and a display unit (40) adapted to display the calculation result of the lightning surge current, wherein all the above components are unitized by being housed in a casing (2).


A lightning surge detector 1 includes a first terminal unit 3 connected to a ground-side terminal unit of a surge protective device, a second terminal unit 4 connected with a ground wire, a conducting coupling bar 5 adapted to couple the first terminal unit 1 and the second terminal unit 4, a detection coil 7 placed in a vicinity of the conducting coupling bar 5 and adapted to detect a lightning surge current flowing through the conducting coupling bar 5, a waveform processing unit adapted to stretch a voltage waveform of the detected lightning surge current and thereby output a waveform-modified voltage, a computation control unit adapted to produce a calculation result of the lightning surge current from the waveform-modified voltage, and a display unit 40 adapted to display the calculation result, wherein all the above components are unitized by being housed in a casing 2.


Patent
Sankosha Corporation | Date: 2012-06-11

A cam pin provided so as to project from a tip portion of an elastic tongue piece formed on a base unit of a protector S is inserted into a cam groove of a cam member disposed between the base unit and an operation member, and the operation member is moved in a direction in which the operation member moves away from or closer to a lower horizontal portion of the base unit to move the cam member, thus moving the cam pin between a locked position at which the cam pin a is positioned near a boundary between a inclined groove portion and a parallel groove portion of the cam groove of the cam member to inhibit the protector from being disengaged from a DIN rail and a unlocked position.


Patent
Sankosha Corporation | Date: 2016-05-04

A surge protective system has a plinth (10) for wiring and is connected between a plurality of line side wires (83) and a ground wire (84). A plurality of surge protective devices (SPDs) (40) and one surge detector (60) are disposed in parallel and detachably fitted into and attached to the plinth (10). The plinth (10) has a wiring metal fitting (12) for connecting the plurality of SPDs (40) and the one surge detector (60). When a lightning surge current enters into the surge protective system from the line side wires (83), the lightning surge current flows to the surge detector (60) through the SPDs (40), a 1st plinth contact part (14) in the wiring metal fitting (12), a connection part (16) and a 2nd plinth contact part (15). The lightning surge current flowing to the surge detector (60) is discharged to the ground through the ground wire (84).


Patent
Sankosha Corporation | Date: 2015-09-21

A surge protective system has a plinth for wiring and is connected between a plurality of line side wires and a ground wire. A plurality of surge protective devices (SPDs) and one surge detector are disposed in parallel and detachably fitted into and attached to the plinth. The plinth has a wiring metal fitting for connecting the plurality of SPDs and the one surge detector. When a lightning surge current enters into the surge protective system from the line side wires, the lightning surge current flows to the surge detector through the SPDs, a 1st plinth contact part in the wiring metal fitting, a connection part and a 2nd plinth contact part. The lightning surge current flowing to the surge detector is discharged to the ground through the ground wire.


Patent
Sankosha Corporation | Date: 2012-10-10

A surge current detection device 30 is detachably attached to a conductor 11 and detects a surge current entering the conductor 11. The surge current detection device 30 includes: a holder 40 releasably holding the conductor 11 via first and second holder bodies 40-1 and 40-2 facing each other; a magnetic force concentrating member 60 having a substantially U-shaped cross-section, the magnetic force concentrating member 60 being secured inside the holder 40 and concentrating a magnetic flux included in a magnetic field generated by the surge current entering the magnetic flux conductor 11 to a high density at a predetermined detection region; and a magnetic material sheet 70 secured inside the holder 40 in such a manner that the magnetic material sheet 70 is positioned at the detection region, the magnetic material sheet 70 detecting the surge current.

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