The Martindale EZ2500 Non Trip Earth Loop Tester is supplied with a 10A Australian plug mains lead for testing for testing GPO outlets but an additional 3 wire test lead can be purchased (Martindale TL88) for testing at light fittings and fused connection units.

A soft carry case (TC210) and comprehensive manual are also included.

Martindale EZ2500 Non Trip Earth Loop Tester Features:

Martindale EZ2500 Specifications:

The post Martindale EZ2500 Non Trip Earth Loop Tester appeared first on Obiat Electronics.

Able to test to IEC 61439-1 Standard that will be mandatory by 2021 for testing Switchboards.

The Metrel Electrical Safety Manager (MESM) PC software enables upload of automated test sequences, projects, downloading of test results, automatic data storage into a file and printing of professional test reports specially designed for specific applications. Due to selected test functions, durable construction and accompanying PC SW package MI 3325 MultiServicerXD is the perfect instrument for electrical safety testing in the most demanding industrial environments and automated production lines or specialized workshops.

Metrel MI 3325 Measuring Functions

• Continuity (2-wire & 4-wire), 0.2 A, 4 A, 10 A, 25 A + voltage drop @ 10 A;
• HV AC, HV AC programmable 100 V – 5000 V;
• Insulation resistance (Riso, Riso-S) 50 V, 100 V, 250 V, 500 V, 1000 V (DC);
• Sub-leakage current, (Isub, Isub-S) 110 V (AC), 230 V (AC);
• Z loop – fault loop impedance and prospective fault current (Ipsc, Ulpe, Uc(P));
• Zs rcd – fault loop impedance and prospective fault current in system with RCD (Ipsc, pe, Uc(P));
• Z line – line impedance and prospective short-circuit current (Ipsc, Uln);
• Functional test (power P/S/Q, voltage, current, cos fi, frequency, ThdU, ThdI, PF);
• Touch leakage current;
• RCD testing (RCD Uc, RCD t, RCD I);
• Differential leakage current;
• PE leakage current;
• Polarity;
• Clamp current;
• Voltage, Frequency, phase rotation;
• Varistor test;
• Voltage drop;
• Discharging time.

Metrel MI 3325 Key Features

• Touch screen: high resolution colour touch screen, 4.3” TFT.
• Double manipulation: keyboard and touch screen enable the user to control the instrument in any manner they like.
• Pre-defined AUTOSEQUENCE®s: enable the user simple and quick execution of test sequence for the chosen device.
• Support for RCD testing: A, AC, B, B+ and F RCDs.
• Testing of welding equipment (only in combination with A 1422): MultiServicerXD support testing of welding equipment in accordance with IEC/EN 60974-4.
• Functional inspections.
• Visual inspections.
• Custom inspections (visual and functional).
• Built-in help screens for referencing on site.
• Built-in fuse tables for automatic evaluation of the line / loop impedance result.
• Monitoring of all 3 voltages in real-time.
• Hi-pot: high voltage AC (5 kV @ 250 VA).
• Continuity: 4 – wire continuity test with selectable test current (0.2 A, 4 A, 10 A, 25 A) enabling precise measurements.
• Communication: RS-232, USB, Ethernet and Bluetooth communication ports enabling downloading, uploading and remote control over instrument.
• Multi-system testing: the instrument can be used on TT, TN, IT and 115 V supply systems.
• Automated RCD testing procedure (RCD AUTO).
• Automated impedance testing procedure (Z AUTO).
• Measurement filtering according to the selected area group.
• Large memory: support for microSD memory cards, 8 GB card already integrated in the instrument, although that can be expanded to 32 GB.
• PC SW Metrel ES Manager: enables creation of test structures, user-defined AUTOSEQUENCE®s, professional test reports and data transfer for archiving.

Software

• PC SW Metrel ES Manager: enables creation of test structures, user-defined AUTOSEQUENCE®s, professional test reports and data transfer for archiving.

Metrel MI 3325 Standard Accessories

• • • Instrument MI 3325 MultiServicerXD
    • HV test lead with test probe
    • HV test lead with crocodile
    • Mains cable
    • IEC test cable
    • Residual voltage test cable
    • Plug test cable
    • 3-wire test lead, 3 m
    • Continuity test lead, 2.5 m, 2 pcs
    • Test lead, red, 1.5 m
    • Test probe, 4 pcs (black, red, green, blue)
    • Crocodile clip, green
    • Crocodile clip, blue
    • Crocodile clip, black, 3 pcs
    • Crocodile clip, red, 3 pcs
    • Calibration certificate
    • RS-232 cable
    • USB cable
    • Short instruction manual
    • CD with instruction manual (full version)
    • PC SW Metrel ES Manager BASIC *
    • Protective bag for accessories (mounted on the case)

* Metrel ES Manager can be downloaded free of charge from Metrel Web server.

The post Metrel MI 3325 Multifunction Tester appeared first on Obiat Electronics.

Earth fault loop impedance is the path followed by fault current when a low impedance fault occurs between the phase conductor and earth, i.e. “earth fault loop”. Fault current is driven round the loop by the supply voltage. The higher the impedance, the lower the fault current will be and the longer it will take for the circuit protection to operate.

To make sure the protection operates fast enough, the loop impedance must be low. Every circuit must be tested to make sure that the actual loop impedance does not exceed that specified for the protective device concerned.

Prospective short circuit current (PSC) testing

The prospective short circuit or fault current at any point in an electrical installation is the current that would flow in the circuit if no circuit protection operated and a complete (very low impedance) short circuit occurred. The value of this fault current is determined by the supply voltage and the impedance of the path taken by the fault current. Measurement of PSC can be used to check that protective devices within the system will operate within safety limits and as per the safe design of the installation. PSC is normally measured between the phase and neutral.

The TNT-EL mains lead supplied with SEW 8025LP

SEW 8025LP Specifications:

Loop Impedance
Range	Measuring range	Nominal test current at 0 Ω external loop	Accuracy
20 Ω	0.00~19.99 Ω	23A / 40ms	(2%rdg + 4dgt)
200 Ω	0.0~199.9 Ω	2.3A / 40ms
2000 Ω	0~1999 Ω	15mA / 400ms
Prospective Short-circuit Current
Range	Measuring range	Nominal test current at 0 Ω external loop	Accuracy
20 KA	0.00~4.00 KA	23A / 40ms	Consider accuracy of loop impedance
2000 A	0~1999 A	23A / 40ms
200 A	0.0~199.9 A	2.3A / 40ms
Voltage Display
Measuring range	Accuracy	Remark
150~260 V	(2%rdg + 4dgt)	at 0 Ω external loop
General
Temperature	0 ~ 40 °C
System voltage	230V	+13%
		-15%
System frequency	50Hz
None Battery system voltage	150V ~ 260V
Over Temperature Protection	When overheating,the ”  ”  symbol will show on the LCD, and the 8025LP stop measuring.
Wiring check	P-E	LEDs illuminate when the wiring polarity of circuit under test is correct
	P-N
	N-E	LED is light when P and N are reversed or the Earth is not connected.
15mA Loop measurement	Loop impedance 2000Ω range measurement is carried out with low test current (15mA). The current will not cause tripping out for ELCBs.

The post SEW 8025LP LOOP & PSC TESTER appeared first on Obiat Electronics.