RCD/ ELCB Loop & Polarity Tester, Voltage Indication:25V~264VAC, RCD Test Voltage:230VAC, Freq:50/60Hz, Trip Current Setting:10mA, 20mA , 30mA, NCV:Bar Graph Display & Buzzer Alert, 136x75x31mm
RCD/ ELCB Loop & Polarity Tester
Overview
The MT312 is a compact, versatile tester designed for 3-wire AC circuits, supporting ELCB/RCD testing, loop impedance measurement, and polarity verification. It features a Non-Contact Voltage (NCV) function for safe AC voltage detection and displays wiring status clearly on a large, easy-to-read LCD screen. Voltage measurements between Live and Neutral, as well as Neutral and Earth, are shown directly on the display. The MT312 automatically performs loop impedance testing to verify correct wiring, with intuitive LED indicators: Green for Good, Orange for Check Circuit, and Red for Urgent Check, highlighting any potential faults. During ELCB/RCD testing, the device measures fault trip times up to 99.9ms, with a 10-second buzzer alert confirming a successful trip. A key feature of the MT312 is its interchangeable leads, enabling testing of standard power outlets with the included test leads or distribution boards using the optional MT350L test lead set.
Features
- Compact, versatile tester for 3-wire AC circuits
- Performs ELCB/RCD testing, loop impedance measurement, and polarity verification
- Non-Contact Voltage (NCV) function for safe AC voltage detection
- Clear LED & LCD display for wiring status and voltage readings
- Measures voltage between Live-Neutral and Neutral-Earth directly on the display
- Fault Trip Time: 99.9ms max, with 10-second buzzer alert on ELCB trip
- Automatic loop impedance testing to verify correct wiring
- Interchangeable leads - Perform measurements at a socket or distribution board (MT350L Optional lead for distribution boards)
- LED indicators for wiring status:
- Green – Good (Resistance < 1.8Ω)
- Orange – Check (Resistance between 1.8Ω & 92Ω)
- Red – Urgent Check (Resistance > 92Ω)
Specifications
|
Function
|
Range
|
|
Voltage Indication
|
25V to 264V AC
|
|
RCD Test Voltage
|
230V AC
|
|
Frequency
|
50/60Hz
|
|
Trip Current Setting
|
10mA, 20mA, 30mA
|
|
Fault Trip Time
|
99.9ms max. Buzzer alert for 10 seconds when ELCB trips
|
|
Loop Impedance
Wiring Indication
|
Green – Good
(Resistance <1.8Ω)
Orange – Check
(Resistance Between 1.8Ω & 92Ω)
Red - Urgent Check
(Resistance >92Ω)
|
|
NCV
|
Bar graph display & Buzzer alert
|
|
Auto Power Off
|
5 Minutes (Approx)
|
|
Display
|
LED & LCD
|
|
Batteries
|
2x AAA
|
|
Dimensions
|
136 x 75 x 31mm
|
|
Weight
|
185g
|
Downloads
Additional Information
| Device |
Tester |
| Type |
RCD/ ELCB | Loop & Polarity |
The MAJ MT312 RCD/ELCB Loop & Polarity Tester is your essential tool for safe and efficient electrical testing. With features like non-contact voltage detection, automatic loop impedance testing, and clear LED indicators, you can easily verify circuit integrity and ensure compliance. Compact and versatile, it’s perfect for both professionals and DIY enthusiasts seeking reliability and accuracy in their electrical assessments.
