Jaeshininformation Co., of Korea Distributor

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1 Earth Leakage Current Measurement and ELCB (RCD) trip analysis & Chemical Factory Inverter AC_DC_Battery_Temp Case study Jaeshininformation Co., of Korea Distributor

2 Our Goal We can follow IEEE1100 perfectly! DC V & I? N-E V?

3 Phase 1 Semiconductor Tools

4 1. Scope Semiconductor Tools Electric Room ELB Type 0.2Sec/800mA D-Box1 MCCB Type D-Box2 MCCB Type CLS#1 MAIN 3ph ELB Type 0.1Sec/500mA FACTORY Main E-Room #3 MCCB Type CLS#7 MAIN ELB #1 Type 0.1Sec/500mA Trip Source? CLS #7 WALL HEATER 1ph ELB Type 0.1Sec/30mA Wall Heater #1 ~ #14

5 2. Diagram A. General diagram Why trip:? 3P4W 208/120V

6 2. Diagram B. Heater Diagram Why trip :?

7 3. Measuring by PQube3 A. PQube3 Measuring Method Leakage Current : 45mA Noise Filter Leakage Current : 960mA 250A x 3CT Magnetic Contactor Monitoring 1000 : N current : 5~8 Amp PT 220:24 PQube3 Voltage : 5 points Current : 7 points Leakage current : 1 point Sag Monitoring I7(5:0.333)

8 3. Measuring by PQube3 ZCT = 1,000mA : 0.333V For earth leakage current PT = 220V : 24V Split CT PSL Clamp on CT CP-1,000 = 1,000A : 0.333V

9 3. Measuring by PQube3 B. PQube3 Installation

10 4. Measuring Data A. Harmonics

11 5. Event Data A :15:18:36 ELB#1 Trip

12 5. Event Data B :15:18:36 ELB#1 Trip Earth Leakage Current : trip soruce Heater Current ( R, S, T - I6, I7, I8 ) Main ELCB Input L1-L2 V

13 5. Event Data I8 Heater Current

14 5. Event Data Trip tmie

15 5. Event Data Earth Leakage Current : 1,400mA Tripped within 0.1sec

16 5. Event Data ELCB Trip Threshold setting : 500mA, 0.1sec 500mA duration : 35msec

17 5. Event Data Earth Leakage Current sec sec

18 5. Event Data I6 Heater Current +0.01sec wave changed sec wave changed

19 5. Event Data I7 Heater Current sec - wavechange sec Wave changed

20 5. Event Data I8 Heater Current sec Wave changed

21 5. Event Data B :11:56 2 nd Trip

22 5. Event Data B :11:56 2 nd Trip Leakage Current Trip Curve Leakage Current Formula = 2 * π * 50Hz * 120V * C uf

23 5. Event Data ELCB Trip threshold setting : 500mA, 0.1sec 500mA duration : 40msec

24 5. Event Data L6 Heater Current

25 5. Event Data L1-N Voltage

26 6. Conclusion A. Fixed the imperfect heater connection line. B. Changed the process on-off time of heater. The process was changed so that the change of the current phase did not occur.

27 Phase 2. Telecommunication Device

28 1. Scope Proof of earth leakage of capacitive leakage current and proposal of improvement method Normal ELCB IGR ELCB ZCT SMPS Ground Fault

29 2. Analysis model tripping of ELCB by lightning Tripping analysis modeling of earth leakage breaker in case of lightning, power line grounding In the case of one phase ground fault, the earth leakage breaker trip occurs in unnecessary operation area due to the dynamic instant leakage current that momentarily increases the capacitive leakage current between the ground and power line. 22.9kV : 380V / 220V T R lightning arrester 3P 3set R, S, T, N Fault line Normal line Dynamic Capacitive Leakage Current Instantaneous Rise in Electrical Leakage Circuit Breaker on no-problem power line Analysis method! : If the distribution line is grounded by lightning or trees, the high voltage is grounded from the lightning arrester to ground to prevent surge voltage from reaching the customer directly. On the other hand, the surge protector is attached to the front of the earth leakage breaker for the purpose of preventing the internal surge and induction light from the customer side. However, in order to prevent tripping of the earth leakage breaker, it is necessary to install a surge protection device of 12kV or more inside the earth leakage breaker none. This is because the earth leakage breaker is not tripped by the surge but tripped due to the instantaneous capacitive leakage current rise between the ground, which causes tripping of most earth leakage breaker installed in the wireless mobile communication repeater and internet communication equipment.

30 3. Analysis model tripping of ELCB by Elevator 4 Elevator distributor panel of Apartment Normal load current 4.5A and replace with IGR-32, 20A with patent earth leakage breaker. IGCgenerator

31 3. Analysis model tripping of ELCB by Elevator 4 Elevator distributor panel of Apartment Breaker trip does not occur even if leakage current 40mA or more occurs arbitrarily after replacing IGR breaker. Rise of leakage current

32 3. Analysis model tripping of ELCB by compressor motor s ground fault 114 #1 Air conditioner frequently Tripping ELCB PQube3 monitoring for earth leakage current

33 3. Analysis model tripping of ELCB by compressor motor s ground fault normally R, S, T, N 380V, 220V between the normal status. N-G is maintained below 1 volt. Abnormal state 2V between S-G and 220V between N-G.

34 4 3. Analysis model tripping of ELCB by compressor motor s ground fault Daily trend of PQube3 S phase : Mobile device power line Periodically, T-phase grounded equipment is tracked and communicated at the start of air conditioner # 1. When the compressor of the air conditioner is grounded, the leakage breaker for the power source of the S phase is tripped.

35 3. Analysis model tripping of ELCB by compressor motor s ground fault 90kHz Noise Track equipment that periodically changes voltage. Noise level is measured, but not at a large level, but the periodic noise of 90 khz is revealed by the air conditioner # 1 compressor motor.

36 3. Analysis model tripping of ELCB by compressor motor s 114 ground fault Mobile device S ph V Sph current Mobile leakage current T ph V T ph current N-G V

37 Analysis model tripping of ELCB by compressor motor s ground fault Events that occur when changing waveforms If a ground fault occurs on the T phase, the circuit breaker for mobile device is tripped.

38 3. Analysis model tripping of ELCB by compressor motor s ground fault In the real time measurement graph of the instantaneous leakage current rise of the circuit after replacing the frequent trip breaker with the IGR breaker, a leakage current of 15 ma maximum was confirmed in connection with the N-G potential rise in the graph. Based on this, it is estimated that the circuit breaker may trip due to the motor start when the cooling load operation in summer is started..

39 4. Conclusion A. LG U+ decided to install 6,000 sets of IGR ELCB in their mobile and internet device power lines.

40 Phase 3. Chemical Factory Inverter AC_DC_Battery_ENV1 Analysis Case Study

41 1. Why did the battery cells temperature increase highly? Temperature increased : why?

42 2. PQube3 Connection PT/TR PT 440V : 24V PQube3 AN-3 : Analog - V E I6 A : Analog - A L1 - A Chemical Factory Inverter L1 - V N INPUT 440V 3P AC OUTPUT 120V AC Power Quality 130V DC DC current Hall Sensor ATT2 AN-1 (V) AN-2 (V) Analog (A) Temperature : Battery 2V x 60 cells ENV-1 Lte Modem

43 3. PQube3 Connection and Installation pictures

44 3. PQube3 Connection and Installation pictures

45 3. PQube3 Connection and Installation pictures ENV1 receiving through Lte modem

46 4. Monitorin g & Analyzing Inverter out : 120V AC Inverter out current : 28 ~36A Inverter input current : 20A Charging volt : 0.13kV Battery Charging current:0~20a Inverter input volt : 440V

47 4. Monitorin g & Analyzing Inverter output volt : 120V Inverter output current Inverter input current :? Charging volt : 130V DC Charging current Charging input volt

48 4. Monitorin g & Analyzing Charging volt Charging current

49 4. Monitorin g & Analyzing Battery Temperature and Humidity : No problems.

50 4. Monitorin g & Analyzing Daily. Problem! Charging current : 90A During 14 hours

51 4. Monitorin g & Analyzing Problem! Charging current : 90A During 14 hours

52 5. Conclusion A. The inverter had some problems in charging circuit. Battery had no problems.

53 Phase 4. IGR ELCB & Leakage Current Analysis Technology Introduction made by Jaeshin s patent

54

55

56

57

58

59 The capacitive leakage current(igc) occurred in LED Sensor Lamp Line. The IGR ELCB can be only installed in this case.

60 We want to share our technology with PSL s partners!

61 Many thanks! CEO : Han, Jeong-kyu ( ) jasshininfo@korea.com / ceo@jsdata.co.kr

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