General Description - Megger LCB2000/2 Guide De L'utilisateur

General Description

This instrument has been designed to fully test RCDs
and measure loop impedance and PSCC on single and
three phase systems with a rated voltage up to 300V
a.c. r.m.s. to earth. It has been designed to comply with
U.K., European and other international wiring
regulations and standards.
Measured values are displayed on a large backlit digital
LCD. With the LCB2500/2 these values may also be
stored in internal memory for later recall to display,
direct printing to a standard serial printer, or
downloaded to a PC for storage, analysis and report
generation.
Key Features
Storage of test results in memory (LCB2500/2 only)
Selectable backlight
Large clear liquid crystal display
Operates regardless of mains polarity
Automatic test start on voltage detection
Loop Tests
Direct indication of short circuit current
Phase-phase (up to 480V), phase-neutral and
phase-earth tests
No trip loop impedance tests with a resolution
down to 0,01Ω
No neutral needed for line to earth testing
(except for No Trip Loop L-PE xtra)
Storage of Distribution Circuit or distribution board
incoming loop impedances (LCB2500/2 only)
Final Circuit R1+R2 display (LCB2500/2 only)
RCD tests
Tests selective (delayed), general and d.c. sensitive
RCDs
Contact voltage and loop resistance displayed
Selectable test current for programmable devices
Auto sequence test
Ramp test
General
Supply voltage and frequency measurement
Three Phase sequence indication
Mains outlet polarity indication
Application
The instrument may be connected live to earth or
between live conductors of systems that have a rated
voltage of 300V a.c. rms to earth and an Installation
(Overvoltage) Category III or lower. This means that the
instrument may be connected to any fixed wiring of a
building installation, but not to primary supply circuits
such as overhead cables. To maintain user safety and
ensure accurate measurements, only use the test leads
supplied or recommended for use with this instrument.
The instrument is fuse protected to 440V 10kA. The
maximum current which could flow through this fuse in
the case of a fault is limited to 10 kA by the impedance
of the test leads.
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