MEGGER LT300 Installation Manual

LT300

High current loop testers

■ High current loop tester

■ Single and 3 phase testing

■ 16 Hz to 400 Hz operation

■ CATIV 300 V applications

■ Two wire lead set or mains plug leads

■ Tough armoured case

■ Built-in cover

LT300

High Current Loop Testers

DESCRIPTION

The LT300 offers high current loop testing over a wide range
of frequencies and supply voltages with simple, fast, two
wire operation.

It has a large clear display that aids visibility in poor
conditions.

wo models are available:

T

LT300-EN-00 - with red/green leads

T300-EN-BS - with BS1363 mains plug lead

L

The high current loop test provides fast accurate and stable
results with a resolution to 0.01 Ω on the 20 Ω range.

equency range

Fr

Supply frequency is indicated upon connection to the

. This will automatically set to the measured supply

supply
frequency either 16 Hz, 50/60 Hz or 400 Hz. T
commence automatically.

Loop Impedance measurement:

wo loop impedance ranges are provided.

T
20 Ω - Resolution to 0.01 Ω
200 Ω - Resolution to 0.1 Ω

Supply voltage:

Operational supply range extends from 50 V to 550 V (400 V
@ 16 Hz), with a warning for voltages over 330 V high­lighting accidental phase to phase connections on a nominal
230 V system.

esting will

Single Phase CATIV 300 V phase to earth, as well as 550 V
phase to phase applications (400 V @ 16 Hz)

GENERAL

The instrument is housed in a rubber armoured case with a
built-in cover to protect the display when not in use.

The IP54 weatherproof rating provides excellent protection
in adverse conditions.

The instrument is supplied with either a two wire
(red/green) lead set, or a mains plug test lead for access to
wall sockets, a certificate of test and a hard carry case.

LT300

High Current Loop Testers

SPECIFICATION

Voltage measurement range

Voltage range: 0 V to 550 V (400 V @ 16 Hz)
Accuracy: ±5% ±2 V

Loop test operating frequencies

16 Hz 15 Hz to 18 Hz

50/60 Hz 40 Hz to 70 Hz

400 Hz 260 Hz to 490 Hz

Test currents

20 Ω Range 200 Ω Range

550 V 27 A 2.7 A

230 V 12 A 1.2 A

115 V 6 A 0.6 A

50 V 3 A 0.3 A

Loop test accuracy

Loop resistance:

0 to 19.99 Ω (20 Ω range) ±5% ±0.03 Ω
0 to 199.9 Ω (200 Ω range) ±5% ±0.5 Ω

EMC

In accordance with IEC61326 including amendment No.1

Weight: 980gms (2.16lb)

Dimensions: 203 x 148 x 78mm ( 8 x 5.8 x 3 in)

Environmental

Operating temperature: -10°C to +60°C

Storage temperature: -25°C to +70°C

Humidity: 90%RH @+40°C

Maximum altitude: 2,000 m

Dust and water: IP54

Battery: 8 x AA (LR6) alkaline or NiMH rechargeable cells.

Safety

Meets the requirements of 300 V CA
Phase to Phase (400 V @ 16 Hz).

EN61557

Complies with the following parts of EN61557,Electrical safety in
low voltage systems up to 1000 V a.c. and 1500 V d.c. Equipment
for testing, measuring or monitoring of protective measures:

t1 - General Requirements

ar

P
Part3 - Loop resistance

TIV phase to ear

th or 550 V

ORDERING INFORMA

Item (Qty)

High current loop tester with red/green
lead set LT300-EN-00

High current loop tester with BS1363 mains
plug lead LT300-EN-BS

Included Accessories

Red/green 2 wire test lead set
(LT300-EN-00) 6220-784
Mains plug test lead (BS1363) (LT300-EN-BS) 6220-810

TION

Order Code