What is an ELCB/RCD Tester? How is ELCB Testing done?Metravi Instruments
What is ELCB / RCD Testing? How is an ELCB test done?
ELCB or RCD Testing refers to checking whether the Breaker is functional and working as it should be. ELCB Testing is done by using the Current Injection Method, wherein simulating an appropriate fault condition, a low magnitude fault current (30mA to 200mA) is injected to test whether the device trips or not. A functioning ELCB/RCD will trip the circuit during a Current Injection Test.
Why test ELCBs or RCDs?
Since the ELCBs and RCDs are important and critical protection devices, it is always in the interest of the end user to periodically check the health and functioning using this kind of test. Any test buttons built into the ELCB/RCD can only help test manual functioning of the breaker.
An ELCB (Earth Leakage Circuit Breaker) or RCD (Residual Current Device) detects and measures any fault currents from live wire to the ground wire, within the circuit installation that it is protecting. ELCB, RCD and RCCB are all Breakers and protect circuit installations.
What is an ELCB?
An ELCB is a device directly checks current leakage to earth. It protects by cutting off the power to the circuit. It switches off the power and remains off till it is manually reset.
What is an RCD?
An RCD protects a circuit by automatically disconnecting the electrical supply in a Three Phase Circuit when it detects an imbalance between live conductors. In case of Single Phase Circuits, an RCD monitors the difference in currents between the live and neutral conductors.
What is an RCCB?
An RCCB (Residual Current Circuit Breaker) is a device which protects people from electrical fires, electrical shocks and/or electrocution, which might be caused because of earth faults or faulty wiring of circuits. When an RCCB is attached to a circuit and a person comes in contact accidentally with an open or live wire in the circuit, it helps avoid earth faults and any electrical shocks by tripping the circuit within a fraction of a second. Thus, RCCBs prevent accidents and it is a safe and good practice to always install RCCBs within circuits.
Metravi offers reliable and high-precision ELCB RCD Testers which have unique functionalities along with the basic trip testing feature.
The Metravi 1810D ELCB RCD Tester is the Basic test Equipment an Electrician cannot do without. It is a dual-function testing instrument which can verify electrical wiring connections and the functioning of ELCB / RCD devices by forcing them to trip. The protection device opens the mains power supply circuit when a current higher than a certain amplitude flows into the ground/earth wire, thus ensuring and verifying that the respective electrical installations meet safety and regulation requirements.
The Metravi 1811 ELCB/RCD Tester has an Intelligent microprocessor chip control, which ensures high accuracy, reliability and stability. It can perform RCD/ELCB Test wiring checks and phase angle selection. The RCD test can be selected to start from a positive (0°) or a negative (180°) half cycle. It features a contact voltage alarm – when the contact voltage is larger than the selected limit value during the RCD test, the RCD test is stopped. Auto-ramping during the test is available along with LINE-NEUTRAL voltage measurement, LINE-PHASE-EARTH voltage measurement, display L-PE input voltage and frequency measurement.
The Metravi 1812EL Digital ELCB Tester comes with Current rating up to 500mA and also reads disconnection time, has phase start Selection: 0° and 180°, over-temperature protection, wiring correctness indication, trip indicator and a phase polarity trip indicator. Being microprocessor-controlled, it features an extra-large LCD with very low consumption. It offers Polarity trip indicator (Positive or Negative phase), wiring polarity indicator and can measure voltage between Line and Earth before testing along with regular ELCB testing.
The Metravi 1813 is a ELCB/RCD Tester has the main function to test the ELCB/RCD and measure the trip values of ELCB/RCD in trip time (expressed in ms) or -in trip current value (expressed in mA). This enables 10mA / 30mA / 100mA / 300mA / 500mA and 1000mA differential circuit breakers to be tested irrespective of their type (normal or delayed). This comprehensive appliance is also used to test the conformity of the network and the connection of the earthing conductor.