User manual
4
1. APPLICATION
The EP27 and EP29 moving-iron panel voltmeters with a change-over
switch are adapted for measuring line-to-line and phase-to-phase RMS
voltages in 3-phase 4-wire power networks.
A six-positional switch installed on the meter frontal side enables the choice
of the measured voltage in six different points of the network system.
2. BASIC REQUIREMENTS, USERS SAFETY
These moving-iron voltmeters are destined to be installed on panels or
switchboards.
They are in conformity with EN 61010-1: 1999 and EN 61010-1/A2:1999
standard requirements.
Remarks concerning the safety:
• The meter installation should be carried out by a qualified staff.
One must consider all accessible aspects of the protection
• Before the voltage switching on, one must check the correctness of
meter connections.
• The disassembling of the meter case causes the cancellation of the
granted guarantee.