INSTRUCTION MANUAL COMBITESTER(LOOP+RCD) MODEL 6050 KYORITSU ELECTRICAL INSTRUMENTS WORKS，LTD.
CONTENTS 1. Safe Testing ...................................................................................... 1 2. Procedure of removing cover ............................................................ 4 2.1 Method of removing the cover .................................................... 4 2.2 Method of storing the cover ........................................................ 4 3. Features ............................................................................................ 5 3.
# 1. SAFE TESTING Electricity is dangerous and can cause injury and death. Always treat it with the greatest of respect and care. If you are not quite sure how to proceed, stop and take advice from a qualified person. This instruction manual contains warning and safety rules which must be observed by the user to ensure safe operation of the instrument and retain it in safe condition. Therefore, read through these operating instructions before using the instrument. IMPORTANT: 1.
# DANGER ● This instrument corresponds to L-PE: 230V+10%-15%50Hz. (for some of ranges; L-L: 400V+10%-15%50Hz) Be sure to use it within this rated voltage. ● When conducting tests do not touch any exposed metalwork associated with the installation. Such metalwork may become live for the duration of the test. ● When testing, always be sure to keep your fingers behind the safety barriers on the test leads.
# WARNING ● Never open the instrument case - (except for battery replacement and in this case disconnect all leads first) because dangerous voltages are present. Only fully trained and competent electrical engineers should open the case. If a fault develops, return the instrument to your distributor for inspection and repair. ● If the overheat symbol appears on the display ( )disconnect the test lead from the circuit and allow to cool down.
2. PROCEDURE OF REMOVING COVER Model 6050 has a dedicated cover to protect against an impact from the outside and prevent the operation part, the LCD, and the connector socket from becoming dirty. The cover can be detached and put on the back side of the main body during measurement. 2.1 Method of removing the cover Fig. 1 2.2 Method of storing the cover Fig.
3. FEATURES 3.1 Instrument Layout 6 1 2 7 8 3 4 9 5 Fig. 3 1...... LCD 2...... RCD FUNCTION SELECT SWITCH (MEMORY RECALL SWITCH) 3...... 0°/180°SELECT SWITCH (ENTER SWITCH) 4...... UL VALUE SELECT SWITCH (MEMORY CLEAR SWITCH) 5...... TEST BUTTON 6...... WIRING CHECK LED LED indication of correct polarity is that the P-E and P-N LEDs are reverse LED is lit. lit. P and N are reversed when the 7...... "I⊿n / LOOP / PSC" SELECT SWITCH (MEMORY SELECT SWITCH) 8......
Optical Adasper Model 8212 (Optional Accessory) Fig.4 Test Lead Model 7125 or Model 7121 (Optional Accessory) Fig.5 LCD DISPLAY 3.2 Test Lead The instrument is supplied with Model 7125 Lead at socket outlets and Model 7121, which is an option, for measuring distribution board. 1. Model 7125 Fig.6 2. Model 7121 (Optional Accessory) Black-Neutral Red-Phase Green-Earth Fig.7 3.3 Optical Adapter Model 8212 (Optional Accessory) For Model 6050, data can be transferred to PC via Optical Adapter Model 8212.
data to PC" for further details. Windows® is a registered trade mark of Microsoft in the United states. 3.4 Test Range (Function) Model 6050 performs four functions. 1. LOOP.....Loop impedance tester 2. RCD.......RCD tester 3. Uc..........Contact voltage tester 4. PSC.......Prospective short circuit current tester 3.5 Applied Standards Instrument operation: IEC/EN61557-1,3,6,10 Safety: IEC/EN61010-1 CATⅢ(300V)-instrument IEC/EN61010-031 CATⅢ(600V)-test lead Protection degree: IEC60529(IP54) 3.
● UL value selector Select UL (limit of contact voltage value) 25V or 50V. Where Uc (contact voltage) exceeds UL value at RCD testing, "Uc H" will be displayed without starting the measurement. When connecting Test Lead to circuit, voltage between L-PE is displayed. If the voltage is lower than 100V, displayed as "V L-PE Lo". ● Voltage Indication And if it is higher than 260V, displayed as "V LPE Hi".But on L-L measurement range, displayed as "V L-PE Hi" if the voltage is 440V or more.
4.
Rated Voltage (AC) Function Range Voltage Measurement L-L corresponding range: 100-260V 100-440V 100-260V L-L corresponding range: 100-440V Rated Voltage (AC) Function ×1/2 ±(2%rdg+4dgt) Accuracy Trip Current Trip Time -8%∼-2% ×1 RCD Accuracy L-PE : ×5 230V +10% -15% 50Hz DC +2%∼+8% ± (1%+3dgt) ± 10% ± 4% Auto Ramp Note: Bias current (DC6mA) added to DCrange.
● Reference conditions ● Operating temperature and humidity. ● Storage temperature and humidity. Specifications are based on the following conditions except where otherwise stated. 1. Ambient temperature : 23±5℃ 2. Relative humidity : 45% to 75% 3. Position : horizontal 4. AC power source : 230V,50Hz 5. Altitude : Up to 2000m 0 to 40℃ , relative humidity 85% or less, no condensation. -20 to +60℃ , relative humidity 85% or less, no condensation.
● Operating Errors of trip current (IEC 61557-6) Function Operating error of trip current ×1/2 -10%∼0% ×1 0%∼+10% ×5 0%∼+10% Auto Ramp -10%∼+10% The influencing variations used for calculating the operating error are denoted as follows: Temperature : 0℃ and 40℃ Earth electrode resistance : I n(mA) Earth electrode resistance(Ω) UL50V UL25V 10 2000 2000 30 600 600 100 200 200 300 130 65 500 80 40 1000 40 20 table.1 System voltage : 230V+10%-15% Supply voltage : 8V to 13.
5. LOOP IMPEDANCE / PSC TESTS 5.1 Principles of Measurement 5.1-1 Measurement of Fault Loop Impedance and Prospective Fault Current If an electrical installation is protected by over- current protective devices including circuit breakers or fuses, the earth fault loop impedance should be measured.
For TN systems the earth fault loop impedance is the sum of the following impedances. ● Impedance of the power transformer secondary winding. ● Impedance of the phase conductor from the power transformer to the location of the fault. ● Impedance of the protective conductor from the fault location to the power transformer. Fig.10 In accordance with the international standard IEC 60364 for a TT system the following condition shall be fulfilled for each circuit.
Practical example of verification of the protection is a TT system according to the international Standard IEC 60364. Fig.11 For this example the maximum value is 1667Ω,the loop tester reads 12.74 Ωand consequently the condition RA is <_ 50/la is met. It is fundamental for this example to test also the RCD to ensure that operation takes place quickly enough to respect the safety requirement.
Note: ● For a distribution circuit a disconnection time not exceeding 5s is permitted. ● When the protective device is a residual current device (RCD),la is the rated residual operating current I⊿n. For instance in a TN system with a nominal voltage of Uo =230V protected by type gG fuses the la and maximum Zs values could be: Disconnecting time 5s Rating (A) Ia(A) Zs(Ω) Disconnecting time 0.4s Ia(A) Zs(Ω) 6 28 8.2 47 4.9 10 46 5 82 2.8 16 65 3.6 110 2.1 20 85 2.7 147 1.
Practical example of verification of the protection is a TT system according to the international Standard IEC 60364. Fig.12 The maximum value of Zs for this example is 2.1Ω(16amp gG fuse,0.4 seconds).The loop tester reads 1.14Ωand consequently the condition Zs<_Uo / la is met. 5.1.
Method of Impedance test between Line and Neutral and Prospective Short Circuited Current test Fig.13 Method of Impedance test between Line and Line and Prospective Short Circuited Current test Fig.14 5.2 LOOP Impedance and PSC Testing 5.2.1 Preparation (1) Turn Function switch and power on the instrument. Select LOOP or PSC. (2) Select the range for a test with "I⊿n / LOOP / PSC" SELECT SWITCH. By pressing "I⊿n / LOOP / PSC" SELECT SWITCH, ▼ mark on LCD shifts and can select each range.
● LOOP range ● PSC range The Initial value LOOP Range 2000Ω PSC Range 200A 5.2.2 Wiring Check (1) Insert the Test Lead into the instrument.(Fig.15) (2) Connect test lead to object to be tested.(Fig.11,12,13,14) (3) Make sure that the P-E and P-N wiring Check LEDs are lit and the wiring in correct LED is not lit. If it is not correct, disconnect the tester and check the wiring for a possible fault. 5.2.3 Testing (1) Press the test button.
6. RCD TESTS 6.1 Principles of Measurement The RCD tester is connected between phase and protective connectors on the load side of the RCD after disconnecting the load. A precisely measured current for a carefully timed period is drawn from the phase and returns via the earth, thus tripping the device. The instrument measures and displays the exact time taken for the circuit to be opened. An RCD is a switching device designed for breaking currents when the residual current attains a specific value.
Type of RCD General(G) Selective(S) I⊿n 5I⊿n 300ms max. allowed Value 500ms max. allowed Value 130ms min. allowed Value 40ms max. allowed Value 150ms max. allowed Value 50ms min. allowed Value Typical examples of instrument connection Practical example of 3-phase + neutral RCD test in a TT system. Fig.16 Practical example of 3-phase + neutral RCD test in a TN system Fig.
6.2 RCD Testing 6.2.1 Preparation (1) Turn Function switch and power on the instrument. Select RCD. (2) Press RCD Function switch to select RCD Function for test. Selected function will be displayed on LCD. For testing RCD's to verify that × 1/2 they are not too sensitive. ×1 For measuring the trip time. ×5 For testing at I⊿n ×5. DC For testing DC sensitive RCD's. AUTO RAMP TEST( ) For measuring the trip out current.
6.2.3 Testing (1) Press the TEST BUTTON Operating time of RCD is displayed on LCD. At Auto Ramp, operating current value of RCD will be displayed. ● × 1/2.................The Breaker should not trip. ● × 1.....................The Breaker should trip. ● × 5.....................The Breaker should trip. ● DC..................... The breaker should trip. ● Auto Ramp( ).. The Breaker should trip. Check Trip Out Current. (2) Press the 0°/180°switch to change the phase and repeat step(1).
● The earth electrode resistance of a measuring circuit with a probe shall not exceed table1(page 12). For the RCD range of Model 6050, distortion factor of test current is improved compared with our traditional instruments. Therefore, at operating time measurement of RCD, operating time of some RCD and our traditional instruments may differ a little. 7. Uc TESTS 7.1 Principles of Measurement In fig.16, when grounding is incomplete and R exists, voltage occurs to R if fault current flows in R.
7.2.3 Testing (1) Press the TEST BUTTON. (2) Measured result is displayed on LCD. If the measured result is 100V or more, "UcH V" is displayed on LCD. Note：When Test Lead removed during a measurement, "no" is displayed on LCD and a measurement will be stopped. Please check Test Lead is rightly connected. If "I⊿n" setting is grater than the rated residual current of RCD, RCD will trip and "no" may be displayed on LCD. 8.
(5) Decide it with ENTER SWITCH("ENT" SWITCH). Data will be stored and back to voltage measurement mode automatically. ● By pressing MEMORY MODE EXIT SWITCH ("EXIT" SWITCH) during an operation, can undo the last action. ● When making a measurement, press MEMORY MODE EXIT SWITCH("EXIT" SWITCH) and release the MEMORY MODE. Measurement cannot be performed when Test button is pressed while " MEM " mark is being displayed on the LCD. 9.
9.3 Delete the stored data Stored data can be deleted according to following sequence. (1) Press MEMORY MODE SWITCH ("MEM MODE" SWITCH) on stand-by (at "Lo V" is displayed). Then instrument becomes MEMORY MODE, and " MEM " mark appears on the LCD. The action of each switch changes as shown under each switch. (2) Press MEMORY RECALL SWITCH ("RCL" SWITCH). (3) Select the Data you want to delete with MEMORY SELECT SWITCH ("MEM ▼▲ "SWITCH). Select "ALL" when you delete all data.
● Model 8212 system requirements (1) PC/AT compatible machine on which Microsoft Windows ® 98/ME/2000/XP can operate. (2) Pentium 233MHz or more recommended. (3) RAM 64Mbyte or more. (4) SVGA (800X600) or more. XGA(1024X768) recommended. (5) 20MB or more of free hard disk space recommended. (6) One free COM port (7) CD-ROM drive (necessary at installing) ● Trade mark Windows® is a registered trade mark of Microsoft in the United states. Pentium is a registered trade mark of Intel in the United states. 10.
11. SERVICING If this tester should fail to operate correctly, return it to your distributor stating the exact nature of the fault. Before returning the instrument ensure that:1. The batteries are in good condition. Please remember to give all the information possible concerning the nature of the fault, as this will mean that the instrument will be serviced and returned to you more quickly. 12. CASE AND STRAP ASSEMBLY Correct assembly is shown in Fig20,21.
DISTRIBUTOR Kyoritsu reserves the rights to change specifications or designs described in this manual without notice and without obligations.
