INSTRUCTION MANUAL DIGITAL RCD （ELCB） TESTER MODEL ５４０６A KYORITSU ELECTRICAL INSTRUMENTS WORKS，LTD.
CONTENTS 1. Safe Testing .................................................................................... 1 2. Procedure of removing cover ........................................................... 3 2.1 Method of removing the cover .................................................. 3 2.2 Method of storing the cover ...................................................... 3 3. Features ........................................................................................... 4 3.1 Instrument Layout ....
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 is intended only for use in single phase operation at 230V +10% -15% AC phase to earth or phase to neutral operation or for use in OLD-TT system. ● 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. ● Be sure to remove the test leads from the main power supply promptly after measurement.
2. PROCEDURE OF REMOVING COVER Model 5406A 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 ３ ４ ５ 1 2 3 4 5 6 ........... LCD ........... 0°/180°SWITCH ........... UL VALUE SELECT SWITCH (25V/50V) ............ I⊿n SWITCH (up and down) ............ TEST BUTTON ............ WIRING CHECK LED ※ LED indication of correct polarity is that The P-E and P-N LEDs illuminate. P and N are reversed when the reverse LED is lit. 7 ............ FUNCTION SWITCH LCD DISPLAY Test Lead Model 7125 or Model 7121 (Optional Accessory) Fig.
DANGER ● Use original test lead only. ● Max. allowed voltage between mains test terminals and ground is 300V. ● This unit is only intended for single phase (230V +10%- 15% AC 50Hz) operation or OLD-TT system. 3.2 Test Lead The instrument is supplied with Model 7125 Lead at socket outlets and Model 7121 distribution board lead (Optional Accessory). 1.Model 7125 2.Model 7121(Optional Accessory) BLACK NEUTRAL RED PHASE GREEN EARTH Fig.4 3.3 Test Range (Function) Model 5406A performs five functions.
3.4 Applied Standards Instrument operation: Safety: Protection degree: IEC/EN 61557-1,IEC/EN 61557-6 IEC/EN 61010-1 CATⅢ(300V) - instrument IEC/EN 61010-2-31 CATⅢ(600V) - test lead IEC60529 (IP 54) 3.5 Features Model 5406A has the follwing features: Battery is not used Model 5406A is not battery-operated, but operates by the voltage supplied from the system. Wiring check Three LEDs indicate if the wiring of the circuit under test is correct.
4. SPECIFICATION ● Measurement Specification Function Rated voltage (AC) Trip Current Settings (I⊿n) 1000ms ×1/2 10/20/30 /200/300 /500mA ×1 ×5 DC TEST Trip Current Duration 230V+10％ -15％ 50Hz AUTO RAMP TEST Accuracy Trip current Trip Time −8%∼−2% 1000ms +2%∼+8% 200ms 0.6% ±4dgt (10/20/30 /200/300 /500mA) +6mA dc 1000ms 10/20/30 /200/300 /500mA Goes up by 10% from 20% to 110% −8%∼+8% of I⊿n.
LED indication of correct polarity The P-E and P-N LEDs illuminate when the wiring of the circuit under test is correct. The reverse LED is lit when P and N are reversed. Auto data hold The LCD reading is automatically frozen for 3 seconds after measurement. Display The liquid crystal display has 3 1/2 digits with a decimal point and units of measurement (ms, mA). Over voltage Halts measurement to prevent damages to the body when voltage between phase and earth is approx. 260V or more.
5. Residual Current Device (RCD) Test 5.1 RCD test RCD is a switching device designed for breaking currents (opening the contacts) when the residual current attains a specific given value. It works on basis of current difference between phase currents flowing to different loads and returning current flowing through neutral conductor (for a single phase installation). In case the current difference is higher than RCD tripping current, the device will trip disconnecting the main voltage.
● RCD type S = Selective type (with trip out time-delay), this RCD is specially designed for electrical installation where the selectivity characteristic is necessary. In order to assure successful protection on an electrical installation using RCD's, they should be checked testing: ● Trip out time t⊿ ● And in some cases also the Tripping current I⊿. Trip out time t⊿ is time needed by the RCD to trip at rated residual operative current I⊿N.
There is also another kind of RCD called "Type B", for which tripping is ensured for residual sinusoidal alternating currents (like type AC) and residual pulsating DC currents (like type A) and pure or nearly pure DC current, whether suddenly applied or slowly rising. It is also very rarely used in practice because these are only a few models on the market and the price at the moment is very high. Tripping current I⊿ is the lowest residual current which can still cause tripping out RCD.
Practical example of 3-phase + neutral RCD test in a TT system. RCD RO L1 L2 L3 N PE R Fig. 6 Practical example of single phase RCD test in a TN system. Fig.
5.2 RCD test ON "OLD TT SYSTEM" CAUTION M5406A can operate in OLD-TT system with the follwing I⊿n, however, the accuracy is not assured. The instrument does not operate with other I⊿n. ×1/2,×1,DC TEST, AUTO RAMP TEST…I⊿n:10mA, 20mA, 30mA, 200mA, 300mA ×5…I⊿n:10mA, 20mA, 30mA, 200mA Old TT system is a TT system with phase to phase voltage of 220V (instead of 400V) and phase to earth of 127V (instead of 230V) and normally the neutral conductor is not used.
6. TEST PROCEDURE 6.1. Preparation (1) Insert the mains lead into the instrument. (Fig. 9,10) (2) Plug the instrument into the socket outlet that is protected by the RCD to be tested. (3) Turn the breaker switch ON. (4) Press the I⊿n switch to set the Rated Tripping Current (I⊿n) to the rated trip current of the RCD. " ▼" on the LCD moves whenever the I⊿n switch is pressed, and a present I⊿n is indicated. (5) Press the UL value select switch to select UL value (25 or 50V). The initial value : I⊿n ..........
(3) Press the 0° /180° switch to change the phase and repeat step(2) . (4) Change the phase again and repeat step (2). ●Be sure to return the tested RCD to the original condition after the test. WARNING ● If the voltage between phase and earth exceeds approx. 260V, "V L-PE" is shown on the LCD when the test button is pressed, and the measurement is halted. Disconnect the instrument from the mains supply and check the voltage between phase and earth if "V L-PE Hi" is indicated.
● If the "Test button" is released, the result will be displayed for 3s before reverting to zero. If the button is held down, the result will be displayed until the button is released. If the breaker trips, the display will read the trip time. The display will be held for approx 10s. BLACK NEUTRAL RED PHASE Fig. 9 GREEN EARTH Test Lead Model 7121 (Optional Accessory) Fig. 10 WARNING Take enough caution not to make faulty wiring when using Model7121.
7. SERVICING If this tester should fail to operate correctly, return it to your distributor stating the exact nature of the fault. 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. 8. CASE AND STRAP BELT ASSEMBLY Correct assembly is shown in Fig 11. By hanging the instrument round the neck, both hands will be left free for testing.
DISTRIBUTOR 92-1490 01-05 Kyoritsu reserves the rights to change specifications or designs described in this manual without notice and without obligations.
