CN101274724B - Elevator insulation resistance test method - Google Patents
Elevator insulation resistance test method Download PDFInfo
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- CN101274724B CN101274724B CN2008100099007A CN200810009900A CN101274724B CN 101274724 B CN101274724 B CN 101274724B CN 2008100099007 A CN2008100099007 A CN 2008100099007A CN 200810009900 A CN200810009900 A CN 200810009900A CN 101274724 B CN101274724 B CN 101274724B
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Abstract
The invention provides an insulation resistance measuring method of an elevator. The elevator not requiring a machine room having hoisting machines (1-1, 2-1) and control panels (1-2, 2-2) is installed in elevator shafts (1, 2). A landing terminal section (3) is provided at the landing, having a landing earth terminal (Eo) extended from ground (GD), a circuit earth terminal (T3) extended from control board earth terminal (E1) connected to respective terminal of public circuits (C1, C2), a detection resistor (R1) between the Eo and the T3 and a switch (B) that switches between the Eo and T3. The insulating resistance of the public circuits (C1, C2) of the elevator is measured by measuring a voltage drop of a resistor (R1) by a voltmeter. Two terminals of the public circuits (C1, C2) are respectively connected to public constant power suppliers (AVR1, AVR2).
Description
Technical field
The present invention relates to a kind of towing machine and control desk of in hoistway, being provided with, do not need the insulation resistance test method of the elevator of machine room.
Background technology
As the measuring method of the insulation resistance of this kind elevator, the method below known: cut off power supply, use insulating-resistance meter (being commonly referred to " million idol tables ") to measure via switch bonded assembly control setup.
[patent documentation 1] spy opens flat 6-331667 communique
In the prior art of using insulating-resistance meter as stated, if the power supply of cutting control device then can't measure insulation resistance not.But, when cutting off the electricity supply like this, can't carry out the elevator operation service, bring inconvenience for the user.In addition, consider that perhaps stopping the elevator operation service on ordinary days evening in general is very difficult from current social situations.Such problem exists in become the elevator that does not need machine room that towing machine and control desk are set of elevator main flow recently in hoistway too.
Summary of the invention
The present invention proposes according to above-mentioned actual conditions of the prior art, and its purpose is to provide a kind of insulation resistance test method of the elevator that can measure insulation resistance of need not to cut off the electricity supply.
In order to realize this purpose; The invention of the present invention's first mode is used in hoistway, being provided with the elevator that does not need machine room of towing machine and control desk; It is characterized by: stop portion of terminal (3) is set at stop; Said stop portion of terminal (3) has: the stop earth terminal (Eo) that prolongs from ground connection (GD), from and the circuit ground terminal (T3) that prolongs of omnibus circuit (C1, a C2) terminal bonded assembly control desk earth terminal (E1) separately, at the detection resistance (R1) of existence between said stop earth terminal (Eo) and the said circuit ground terminal (T3) and the switch (B) that between said stop earth terminal (Eo) and said circuit ground terminal (T3), carries out switch motion; Measure the loss in voltage of said detection resistance (R1) through potentiometer; Measure the insulation resistance of the omnibus circuit (C1, C2) of said elevator, the two-terminal of said omnibus circuit (C1, C2) is connected with public constant potential source (AVR1, AVR2) respectively.
In the present invention who constitutes like this, when measuring insulation resistance, be connected potentiometer on the circuit ground terminal of the omnibus circuit in the stop portion of terminal and the stop earth terminal, and the disconnection short-circuiting bar.Under this state, measure the loss in voltage that detects resistance, carry out insulation resistance test through potentiometer.Thus, need not to cut off the electricity supply, that is, can in the action of holding circuit and function, carry out the mensuration of the insulation resistance of omnibus circuit.In addition, service personnel need not to get in the hoistway, can carry out the mensuration of the insulation resistance of omnibus circuit at stop.
In addition; The invention of the present invention's second mode is used in hoistway, being provided with the elevator that does not need machine room of towing machine and control desk; It is characterized by: stop portion of terminal (3) is set at stop; Said stop portion of terminal (3) has from public power terminal (T4, T5) that prolongs with the two-terminal bonded assembly control desk terminal (T1, T2) of omnibus circuit (C3) and the stop earth terminal (Eo) that prolongs from ground connection (GD); Go up closure change-over switch (SW1), rectifier (D1, D2), filter circuit (10-1), detect resistance (R1) and force grounding resistance (R2) at said public power terminal (T4, T5); And, this pressure grounding resistance (R2) is connected with said stop earth terminal (Eo), measure the loss in voltage of said detection resistance (R1) through potentiometer; Measure the insulation resistance of said omnibus circuit (C3), the two-terminal of said omnibus circuit (C3) is connected with public ac power switch (SW).
In the present invention who constitutes like this, when measuring insulation resistance, an end of direction change-over switch is connected with a terminals for power supplies of the public power circuit of stop; The other end is connected with rectifier; And, an end of filter circuit is connected with another terminals for power supplies of the public power circuit of stop, the other end is connected with rectifier; And, the other end of filter circuit is connected with detection resistance, pressure grounding resistance.Thus, constitute the half wave rectification power supply of forming by rectifier and filter circuit.
Force the other end of grounding resistance to be connected with the stop earth terminal; Form the path that reduces point, stop earth terminal, detection resistance, pressure grounding resistance and filter circuit via the insulation of circuit thus; And flow through electric current, under this state, measure the mensuration that the loss in voltage that detects resistance carries out insulation resistance through potentiometer.Thus, need not to cut off the electricity supply, promptly can in the action of holding circuit and function, carry out the mensuration of the insulation resistance of omnibus circuit.In addition, service personnel need not to get in the hoistway, can carry out the mensuration of the insulation resistance of omnibus circuit at stop.
In addition; The invention of Third Way of the present invention is used in hoistway, being provided with the elevator that does not need machine room of towing machine and control desk; It is characterized by: be provided with on the said control desk and ground connection (GD) bonded assembly earth terminal (Eo ') and and the public circuit ground terminal of a terminal bonded assembly of omnibus circuit (C1, C2) (T3 ') between configuration detection resistance (R1); And between the said earth terminal that is provided with on the said control desk (Eo ') and public said circuit ground terminal (T3 '), disposed the switch that carries out switch motion (B '); Measure the loss in voltage of said detection resistance (R1) through potentiometer; Measure the insulation resistance of said omnibus circuit (C1, C2), the two-terminal of said omnibus circuit (C1, C2) is connected with public constant potential source (AVR1, AVR2) respectively.
In the present invention who constitutes like this, though need service personnel to get in the hoistway, need not cut off the electricity supply, promptly can in the action of holding circuit and function, carry out the mensuration of the insulation resistance of omnibus circuit.
In addition; The invention of the cubic formula of the present invention is used in hoistway, being provided with the elevator that does not need machine room of towing machine and control desk; It is characterized by: on that be provided with on the said control desk and two ends bonded assembly control desk terminals omnibus circuit (C3) (T1, T2); Closure change-over switch (SW1), rectifier (D1, D2), filter circuit (10-1), detection resistance (R1) and pressure grounding resistance (R2); And, make this pressure grounding resistance (R2) be connected with ground connection (GD) bonded assembly earth terminal (Eo ') on, measure the loss in voltage of said detection resistance (R1) through potentiometer; Measure the insulation resistance of said omnibus circuit (C3), the two-terminal of said omnibus circuit (C3) is connected with public ac power switch (SW).
In the present invention who constitutes like this, also need service personnel to get in the hoistway, but need not to cut off the electricity supply, promptly can in the action of holding circuit and function, carry out the mensuration of the insulation resistance of omnibus circuit.
According to the present invention; Can the not cut off the electricity supply mensuration of insulation resistance of the omnibus circuit that carries out elevator; So can not lose the action and the function of circuit; Make troubles therefore when measuring the insulation resistance of omnibus circuit, can for the elevator user, compared with prior art can improve operation service property for the elevator user.
In addition; Particularly according to the invention of first and second mode; Service personnel can not get into the mensuration of carrying out the insulation resistance of omnibus circuit in the hoistway; Therefore, the mensuration that elevator is carried out the insulation resistance of omnibus circuit can be do not stopped, and good operation service property can be further guaranteed for the elevator user.
Description of drawings
Fig. 1 explains first embodiment of the insulation resistance test method of elevator of the present invention.
Fig. 2 is the circuit diagram that is illustrated in the control system that possesses in the elevator of using first embodiment of the invention.
Fig. 3 explains second embodiment of the present invention.
Fig. 4 explains the 3rd embodiment of the present invention.
Fig. 5 explains the 4th embodiment of the present invention.
Nomenclature
1 hoistway; The 1-1 towing machine; The layer 1-7 station; 2 hoistways; The 2-1 towing machine; The 2-7 stop; The Eo earth terminal; T3 circuit ground terminal; R1 detects resistance; R2 forces grounding resistance; The B switch; The D1 rectifier; The D2 rectifier; 10 insulation resistance test circuit; The 10-1 filter circuit; The V potentiometer
The specific embodiment
Below, the preferred forms of the insulation resistance test method of the elevator that is used for embodiment of the present invention is described.
Fig. 1 explains first embodiment of the insulation resistance test method of elevator of the present invention, and Fig. 2 is the circuit diagram that is illustrated in the control system that possesses in the elevator of using first embodiment of the invention.
Elevator as shown in Figure 1, that this first embodiment is used to be set up in parallel.In Fig. 1,1 is the hoistway of a machine, and 1-1 is the towing machine of a machine; 1-2 is the control desk of a machine, and 1-3 is the main cable of a machine, and 1-4 is the car of a machine; 1-5 is the weight equalizer of a machine, and 1-6 is the energy disperser of a machine, and 1-7 is the stop of a machine.
In addition, in Fig. 2,1-8 is the electric power converter of a machine; S1 is the power supply of a machine, and FFB1 is the power supply line circuit breaker of a machine, and Ry1 is the running relay contact of a machine; Tr1 is that the power supply of a machine detects voltage transformer, and FFB1-1 is the circuit breaker that power supply detects voltage transformer Tr1, and Do is a rectifier; Ryo is that power supply detects relay, and So is a public power portion, and Tr2, Tr3 are the public power voltage transformers; FFB1-2 is the public power circuit breaker, and Ryo-1 is that power supply detects making contact of relay R yo, and Ryo-2 is the break that power supply detects relay R yo; AVR1, AVR2 are that a machine, No. two public constant voltage supply, the Sw of machine are a machine, No. two public ac power switch of machine, and C1～C3 is a machine, No. two public circuit of machine, and T1, T2 are the control desk terminals of public source of AC; E1 is the control desk earth terminal, and GD is a ground connection.
In addition, in Fig. 1, the 3rd, the stop portion of terminal; Eo is the earth terminal of this stop portion of terminal 3, and T3 is the public circuit ground terminal of stop portion of terminal 3, and T4, T5 are the public power terminals of stop portion of terminal 3; B is a switch, and R1 detects resistance, and V is a potentiometer; In addition, the symbol of the respectively corresponding machine of the symbol of No. two machines.
As shown in Figure 1; In hoistway 1,2, dispose towing machine 1-1,2-1, car 1-4,2-4, control desk 1-2,2-2 etc.; Moved in the elevator of control; As shown in Figure 2, through power supply S1, S2, power supply line circuit breaker FFB1, FFB2, operation relay contact Ry1, Ry2, the So of public power portion and electric power converter 1-8,2-8 control towing machine 1-1,2-1, move the control elevator.
When the So of public power portion loses at power supply S1; Use power supply to detect the forfeiture of voltage transformer Tr1, rectifier Do, power supply detection relay R yo detection power supply S1; The break Ryo-2 that detects relay R yo through power supply is connected with public power voltage transformer Tr3; Keeping public constant voltage supply AVR1, AVR2 is public source of AC, public circuit C1, C2, C3 regular event, car 2-4 regular event.
So, even still regular event, operation of side's power supply forfeiture the opposing party, therefore, the annual insulation resistance test of carrying out once of regulation is not if promptly the insulation resistance test of so-called omnibus circuit generally cuts off both sides' power supply then can not carry out.In addition, particularly in hoistway, have in the elevator that does not need machine room of towing machine 1-1,2-1 and control desk 1-2,2-2 etc., can not carry out if service personnel does not get in the hoistway 1,2.
To this; In first embodiment of the invention; In stop 1-7 configuration stop portion of terminal 3; This stop portion of terminal 3 has: stop earth terminal Eo, the switch B of the public circuit ground terminal T3 that prolongs from control desk earth terminal E1, the grounding jumper Lo that prolongs from the control desk terminal T1 of public source of AC, public exchange terminals for power supplies T4 that T2 prolongs, T5, from ground connection GD and detect resistance R 1; Between the public circuit ground terminal T3 of this stop portion of terminal 3 and stop earth terminal Eo, connect potentiometer V; Cut-off switch B, according to the mensuration magnitude of voltage V2 as the potentiometer V of the voltage drop value that detects resistance R 1, (1) formula below using is measured insulation resistance R.
R＝V1·R11/V2-R11 (1)
At this, R: insulating resistance value, V1: omnibus circuit power source voltage value, V2: measure magnitude of voltage, R11: the resistance value that detects resistance R 1.
According to first embodiment of such formation, just can carry out the mensuration of the insulation resistance of omnibus circuit C1, C2 because need not to cut off the electricity supply, so do not lose action and the function of omnibus circuit C1, C2.Therefore, when measuring the insulation resistance of omnibus circuit C1, C2, do not stop elevator.In addition, because can carry out the mensuration of the insulation resistance of omnibus circuit C1, C2,, can avoid the user is brought inconvenience so do not need service personnel to get in the hoistway 1,2 at stop.Thus, can improve operation service property for elevator customer.
Fig. 3 explains second embodiment of the present invention.In this second embodiment; As ac power switch, measure the insulation resistance of non-connected to chassis omnibus circuit C3; As shown in Figure 3, in stop portion of terminal 3, have: stop earth terminal Eo and the switch B of the public exchange terminals for power supplies T4 that prolongs from the control desk terminal T1 of public source of AC, T2, T5, the grounding jumper Lo that prolongs from ground connection GD.
The end a of the direction change-over switch Sw1 that comprises in the insulation resistance test circuit 10 is connected with the public exchange terminals for power supplies T4 of stop portion of terminal 3; Other end b is connected with rectifier D1; And the end of filter circuit 10-1 is connected with the public exchange terminals for power supplies T5 of stop portion of terminal 3; The other end is connected with rectifier D1, D2; And with detect resistance R 1 and be connected, this other end that detects resistance R 1 is connected with forcing grounding resistance R2, the other end of this pressure grounding resistance R2 is connected with stop earth terminal Eo from the grounding jumper Lo of ground connection GD prolongation.Thus, the insulation that has formed omnibus circuit C3 reduces point, ground connection GD, forces grounding resistance R2, detects the path of resistance R 1 and filter circuit 10-1, and flows through electric current.Therefore, the two ends of the detection resistance R 1 that in insulation resistance test circuit 10, comprises connect potentiometer V, and according to the mensuration magnitude of voltage V2 as the potentiometer V of the voltage drop value that detects resistance R 1, (2) formula below using is measured insulation resistance R.
R＝V1·R11/V2-(R11+R21) (2)
Wherein, R: insulating resistance value, V1: omnibus circuit power source voltage value, V2: measure magnitude of voltage, R11: detect the resistance value of resistance R 1, R21: the resistance value of forcing grounding resistance R2.
In addition, rectifier D1, D2 polarity respectively are provided with on the contrary, the terminal a of direction change-over switch Sw1 can switch to arbitrarily with rectifier D1 bonded assembly terminal b and and rectifier D2 bonded assembly terminal c, another insulation of omnibus circuit C3 reduces point and also can measure.
Thus, same with first embodiment, need not to cut off the electricity supply, promptly can in the action of holding circuit and function, carry out the mensuration of the insulation resistance of omnibus circuit.In addition, service personnel need not to get in the hoistway 1, can carry out the mensuration of the insulation resistance of this omnibus circuit at stop 1-7.
Fig. 4 explains the 3rd embodiment of the present invention.Because be provided with on the control desk 1-2 of the machine that the 3rd embodiment is provided with in hoistway 1 with first embodiment shown in Figure 1 in the identical portion of terminal of stop portion of terminal 3, so measuring principle is identical with first embodiment.
As stated; This 1-2 shown in Figure 3 is the control desk of a machine in hoistway 1, being provided with, and T1, T2 are the control desk terminals of public source of AC, and Eo ' is the earth terminal that is provided with at control desk 1-2; T3 ' is the public circuit ground terminal that is provided with at control desk 1-2; B ' is the switch that is provided with at control desk 1-2, and R1 is the detection resistance that is provided with at control desk 1-2, and V is a potentiometer.
The mensuration process is following; Service personnel gets in the hoistway 1 of a machine; Make a dynamo-electric ladder stop (power supply is an on-state); Connect potentiometer V between public circuit ground terminal T3 ' that is provided with among the control desk 1-2 of a machine that in hoistway 1, is provided with and the earth terminal Eo ' that in control desk 1-2, is provided with; Disconnection is arranged on the switch B ' of control desk 1-2, and the mensuration magnitude of voltage V2 of potentiometer V according to as the voltage drop value of the detection resistance R 1 that is arranged on control desk 1-2 uses above-mentioned following note (1) formula mensuration insulation resistance R.
R＝V1·R11/V2-R11 (1)
In the formula, R: insulating resistance value, V1: omnibus circuit power source voltage value, V2: measure magnitude of voltage, R11: the resistance value that detects resistance R 1.
The 3rd embodiment that constitutes like this is also identical with above-mentioned first embodiment, need not to cut off the electricity supply, and promptly can not stop the mensuration that whole elevators carry out the insulation resistance of omnibus circuit.
Fig. 5 explains the 4th embodiment of the present invention.Because be provided with among the control desk 1-2 of the machine that the 4th embodiment is provided with in hoistway 1 with second embodiment shown in Figure 3 in the identical portion of terminal of stop portion of terminal 3, so measuring principle is identical with second embodiment.
As stated; This 1-2 shown in Figure 3 is the control desk of a machine of setting in hoistway 1; T1, T2 are the control desk terminals of public source of AC; Eo ' is the earth terminal that in control desk 1-2, is provided with, and T3 ' is the public circuit ground terminal that in control desk 1-2, is provided with, and B ' is the switch that in control desk 1-2, is provided with.
The mensuration process is following; The end a of the direction change-over switch Sw1 that comprises in the insulation resistance test circuit 10 is connected with the control desk terminal T1 of public source of AC; Other end b is connected with rectifier D1; And the end of filter circuit 10-1 is connected with the control desk terminal T2 of public source of AC, the other end is connected with rectifier D1, D2, and with detect resistance R 1 and be connected; This other end that detects resistance R 1 is connected with forcing grounding resistance R2, the other end of this pressure grounding resistance R2 is connected with the earth terminal Eo ' that among control desk 1-2, is provided with from the grounding jumper Lo of ground connection GD prolongation.Thus, the insulation that forms omnibus circuit C3 reduces point, ground connection GD, forces grounding resistance R2, detects the path of resistance R 1 and filter circuit 10-1, and flows through electric current.Therefore, the two ends of the detection resistance R 1 that in insulation resistance test circuit 10, comprises connect potentiometer V, and the mensuration magnitude of voltage V2 according to as the potentiometer V of the voltage drop value that detects resistance R 1 uses above-mentioned (2) formula mensuration insulation resistance R.
R＝V1·R11/V2-(R11+R21) (2)
In the formula, R: insulating resistance value, V1: omnibus circuit power source voltage value, V2: measure magnitude of voltage, R11: detect the resistance value of resistance R 1, R21: the resistance value of forcing grounding resistance R2.
In addition, rectifier D1, D2 polarity respectively are provided with on the contrary, the terminal a of direction change-over switch Sw1 can switch to arbitrarily with rectifier D1 bonded assembly terminal b and and rectifier D2 bonded assembly terminal c, another insulation of omnibus circuit C3 reduces point and also can measure.
The 4th embodiment that constitutes like this is also identical with above-mentioned second embodiment, need not to cut off the electricity supply, and promptly can not stop the mensuration that whole elevators carry out the insulation resistance of omnibus circuit.
Claims (4)
1. the insulation resistance test method of an elevator, the elevator that does not need machine room that it is used in hoistway, being provided with towing machine and control desk is characterized in that,
At stop stop portion of terminal (3) is set; Said stop portion of terminal (3) has: the stop earth terminal (Eo) that prolongs from ground connection (GD), from and the circuit ground terminal (T3) that prolongs of omnibus circuit (C1, a C2) terminal bonded assembly control desk earth terminal (E1) separately, at the detection resistance (R1) of existence between said stop earth terminal (Eo) and the said circuit ground terminal (T3) and the switch (B) that between said stop earth terminal (Eo) and said circuit ground terminal (T3), carries out switch motion; Measure the loss in voltage of said detection resistance (R1) through potentiometer; Measure the insulation resistance of the omnibus circuit (C1, C2) of said elevator, the two-terminal of said omnibus circuit (C1, C2) is connected with public constant potential source (AVR1, AVR2) respectively.
2. the insulation resistance test method of an elevator, the elevator that does not need machine room that it is used in hoistway, being provided with towing machine and control desk is characterized in that,
At stop stop portion of terminal (3) is set; Said stop portion of terminal (3) has from public power terminal (T4, T5) that prolongs with the two-terminal bonded assembly control desk terminal (T1, T2) of omnibus circuit (C3) and the stop earth terminal (Eo) that prolongs from ground connection (GD); Go up closure change-over switch (SW1), rectifier (D1, D2), filter circuit (10-1), detect resistance (R1) and force grounding resistance (R2) at said public power terminal (T4, T5); And; This pressure grounding resistance (R2) is connected with said stop earth terminal (Eo); Measure the loss in voltage of said detection resistance (R1) through potentiometer, measure the insulation resistance of said omnibus circuit (C3), the two-terminal of said omnibus circuit (C3) is connected with public ac power switch (SW).
3. the insulation resistance test method of an elevator, the elevator that does not need machine room that it is used in hoistway, being provided with towing machine and control desk is characterized in that,
Be provided with on the said control desk and ground connection (GD) bonded assembly earth terminal (Eo ') and and the public circuit ground terminal of omnibus circuit (C1, a C2) terminal bonded assembly separately (T3 ') between configuration detection resistance (R1); And between the said earth terminal that is provided with on the said control desk (Eo ') and public said circuit ground terminal (T3 '), disposed the switch that carries out switch motion (B '); Measure the loss in voltage of said detection resistance (R1) through potentiometer; Measure the insulation resistance of said omnibus circuit (C1, C2), the two-terminal of said omnibus circuit (C1, C2) is connected with public constant potential source (AVR1, AVR2) respectively.
4. the insulation resistance test method of an elevator, the elevator that does not need machine room that it is used in hoistway, being provided with towing machine and control desk is characterized in that,
On that be provided with on the said control desk and two-terminal bonded assembly control desk terminal omnibus circuit (C3) (T1, T2); Closure change-over switch (SW1), rectifier (D1, D2), filter circuit (10-1), detection resistance (R1) and pressure grounding resistance (R2); And; Make this pressure grounding resistance (R2) be connected with ground connection (GD) bonded assembly earth terminal (Eo ') on; Measure the loss in voltage of said detection resistance (R1) through potentiometer, measure the insulation resistance of said omnibus circuit (C3), the two-terminal of said omnibus circuit (C3) is connected with public ac power switch (SW).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007-084930 | 2007-03-28 | ||
| JP2007084930A JP2008239324A (en) | 2007-03-28 | 2007-03-28 | Insulation resistance measuring method of elevator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101274724A CN101274724A (en) | 2008-10-01 |
| CN101274724B true CN101274724B (en) | 2012-04-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100099007A Active CN101274724B (en) | 2007-03-28 | 2008-02-27 | Elevator insulation resistance test method |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2008239324A (en) |
| CN (1) | CN101274724B (en) |
| HK (1) | HK1125088A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102452594A (en) * | 2010-10-27 | 2012-05-16 | 株式会社日立建筑系统 | Insulation resistance measuring device for elevator |
| CN106687814A (en) * | 2014-09-12 | 2017-05-17 | 奥的斯电梯公司 | Ground fault detector and method for detecting ground faults |
| KR102065822B1 (en) | 2017-06-27 | 2020-02-11 | 주식회사 엘지화학 | System and method for calculating insulation resistance |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59202077A (en) * | 1983-04-30 | 1984-11-15 | Hitachi Cable Ltd | Diagnosis of insulation deterioration of power cable |
| JPH02129560A (en) * | 1988-11-09 | 1990-05-17 | Matsushita Electric Ind Co Ltd | Automatic range switching circuit for insulation resistance meter |
| JPH03118985U (en) * | 1990-03-19 | 1991-12-09 | ||
| JP3301627B2 (en) * | 1991-12-26 | 2002-07-15 | 東洋通信機株式会社 | Apparatus and method for measuring insulation resistance of load equipment |
| JPH0640874U (en) * | 1992-11-02 | 1994-05-31 | 三菱重工業株式会社 | Ground fault insulation resistance tester |
| JPH0826618A (en) * | 1994-07-08 | 1996-01-30 | Mitsubishi Denki Bill Techno Service Kk | Insulation measuring device of elevator |
| JPH09288135A (en) * | 1996-04-23 | 1997-11-04 | Mitsubishi Denki Bill Techno Service Kk | Measuring apparatus for elevator control panel |
| JP2002214278A (en) * | 2001-01-22 | 2002-07-31 | Toshiba Corp | Apparatus for diagnosing high voltage machinery and diagnostic method using the same |
| JP2003306277A (en) * | 2002-04-12 | 2003-10-28 | Toshiba Elevator Co Ltd | Elevator maintenance system |
-
2007
- 2007-03-28 JP JP2007084930A patent/JP2008239324A/en active Pending
-
2008
- 2008-02-27 CN CN2008100099007A patent/CN101274724B/en active Active
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2009
- 2009-03-30 HK HK09103006.7A patent/HK1125088A1/en unknown
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| CN101274724A (en) | 2008-10-01 |
| JP2008239324A (en) | 2008-10-09 |
| HK1125088A1 (en) | 2009-07-31 |
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