Megger LT300 EN-FS Loop Tester

SKU AVO/LT300ENFS Categories ,
  • High current loop test with 0.01 Ω resolution
  • Operates from 16 Hz to 400 Hz supply range
  • Measures from 0 V to 550 V phase-to-phase
  • CAT IV 300 V rated for safety-critical use
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Express Delivery & Calibration

Express Delivery is currently unavailable for customers wishing to add calibration to their New Goods order. For more information, visit our Delivery Information page. 

From £458.18 (ex VAT)

£549.82 (inc VAT)

Earn 458 – 483 points

In Stock - Express Delivery Available
  • High current loop test with 0.01 Ω resolution
  • Operates from 16 Hz to 400 Hz supply range
  • Measures from 0 V to 550 V phase-to-phase
  • CAT IV 300 V rated for safety-critical use
Free Shipping

Spend over £100 on any new goods order and receive automatic free shipping

Rewards

Points make purchases! For every £1 spent, earn back 1p that can be spent on any future new goods purchase

Our Price Promise

We offer a Price Match Promise! Find an equivalent tester for a cheaper price on a competitor site, and we’ll do our best to match it

Express Delivery & Calibration

Express Delivery is currently unavailable for customers wishing to add calibration to their New Goods order. For more information, visit our Delivery Information page. 

From £458.18 (ex VAT)

£549.82 (inc VAT)

Earn 458 – 483 points

In Stock - Express Delivery Available
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Megger LT300 EN-FS Loop Tester

The Megger LT300 EN-FS Loop Tester delivers precise high current loop testing for electrical systems operating across varied frequencies and voltages. Designed for simple, two-wire operation, it is ideal for both domestic and industrial use. The clear digital display ensures excellent visibility even in dimly lit areas, aiding accurate interpretation of results.

Versatile Frequency and Voltage Performance

Engineered for flexibility, the Megger LT300 supports a wide frequency range from 16 Hz to 400 Hz and voltage up to 550 V. It automatically detects supply frequency, streamlining the test process. Whether used on single or three-phase systems, the unit adjusts effortlessly to match the electrical conditions.

Built for Reliability and Protection

Housed in a rugged rubber armoured casing, the Megger LT300 withstands challenging environments. It meets IP54 waterproof standards and includes a built-in display cover for added durability. Test results remain stable and repeatable with a fine resolution of 0.01 Ω on the 20 Ω range.

Two versions are available, offering flexibility in test environments: the Megger LT300-EN-FS with fused test leads and the Megger LT300-EN-BS with a BS1363 mains plug. Each unit is supplied with a hard carry case, ensuring it stays protected during transport and storage.

Key Features
  • High current loop testing ensures stable results
  • Voltage range extends from 0 V to 550 V
  • Dual lead options for socket or terminal testing
  • Auto-detection of frequency for quick setup
  • Works across single and three-phase systems
  • CAT IV 300 V safety classification
  • IP54 housing protects against dust and water
  • Clear LCD screen enhances readability in low light
  • Two loop impedance ranges up to 200 Ω
  • Complies with EN61557 and IEC61010-1 standards
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Megger LT300 EN-FS Loop Tester

The Megger LT300 EN-FS Loop Tester delivers precise high current loop testing for electrical systems operating across varied frequencies and voltages. Designed for simple, two-wire operation, it is ideal for both domestic and industrial use. The clear digital display ensures excellent visibility even in dimly lit areas, aiding accurate interpretation of results.

Versatile Frequency and Voltage Performance

Engineered for flexibility, the Megger LT300 supports a wide frequency range from 16 Hz to 400 Hz and voltage up to 550 V. It automatically detects supply frequency, streamlining the test process. Whether used on single or three-phase systems, the unit adjusts effortlessly to match the electrical conditions.

Built for Reliability and Protection

Housed in a rugged rubber armoured casing, the Megger LT300 withstands challenging environments. It meets IP54 waterproof standards and includes a built-in display cover for added durability. Test results remain stable and repeatable with a fine resolution of 0.01 Ω on the 20 Ω range.

Two versions are available, offering flexibility in test environments: the Megger LT300-EN-FS with fused test leads and the Megger LT300-EN-BS with a BS1363 mains plug. Each unit is supplied with a hard carry case, ensuring it stays protected during transport and storage.

Key Features
  • High current loop testing ensures stable results
  • Voltage range extends from 0 V to 550 V
  • Dual lead options for socket or terminal testing
  • Auto-detection of frequency for quick setup
  • Works across single and three-phase systems
  • CAT IV 300 V safety classification
  • IP54 housing protects against dust and water
  • Clear LCD screen enhances readability in low light
  • Two loop impedance ranges up to 200 Ω
  • Complies with EN61557 and IEC61010-1 standards

 

Technical Specifications
SpecificationDetails
Product nameMegger LT300 EN-FS Loop Tester
Manufacturer part codeLT300-EN-FS
Voltage measurement range0 V to 550 V (400 V @ 16 Hz)
Voltage accuracy±5% ±2 V
Operating frequencies16 Hz, 50/60 Hz, 400 Hz (Full range: 15 Hz to 498 Hz)
Loop impedance ranges20 Ω (0.01 Ω resolution), 200 Ω (0.1 Ω resolution)
Loop resistance accuracy±5% ±0.03 Ω (20 Ω), ±5% ±0.5 Ω (200 Ω)
Test current @ 550 V27 A (20 Ω range), 2.7 A (200 Ω range)
Test current @ 230 V12 A (20 Ω range), 1.2 A (200 Ω range)
Operating temperature range-10°C to +60°C
Storage temperature range-25°C to +70°C
Maximum operating altitude2,000 m
Humidity tolerance90% RH at +40°C
Safety categoryIEC61010-1 CAT IV 300 V / 550 V phase-to-phase @ 16 Hz
Dust and water ingress protectionIP54
Battery requirements8 x AA (LR6) alkaline or NiMH rechargeable
EMC complianceIEC61326 including amendment No.1
Dimensions203 x 148 x 78 mm (8 x 5.8 x 3 in)
Weight980 g (2.16 lb)
Standards complianceEN61557 Part 1 & 3 (general & loop resistance)
What’s Included
  • Megger LT300 EN-FS Loop Tester
  • Fused red/green two-wire test lead set
  • Hard carry case

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