Iskra WM3M4 - Security Advices and Warnings; Before installing

SECURITY ADVICES AND WARNINGS
User’s Manual WM3M4 &WM3M4C
iii
Security Advices and Warnings
Please read this chapter carefully and examine the equipment carefully for potential damages which might
arise during transport and to become familiar with it before continue to install, energize and work with
the WM3M4 & WM3M4C three-phase energy meters.
This chapter deals with important information and warnings that should be considered for safe installation
and handling with a device in order to assure its correct use and continuous operation.
Everyone using the product should become familiar with the contents of chapter »Security Advices and
Warnings«.
If equipment is used in a manner not specified by the manufacturer, the protection provided by the
equipment may be impaired.
PLEASE NOTE
This booklet contains instructions for installation and use of a three-phase energy meters
WM3M4 & WM3M4C. Installation and use of a device also includes handling with dangerous
currents and voltages therefore should be installed, operated, serviced and maintained by
qualified personnel only. ISKRA Company assumes no responsibility in connection with
installation and use of the product. If there is any doubt regarding installation and use of the
system in which the device is used for measuring or supervision, please contact a person who is
responsible for installation of such system.
Before installing
Check the following before installing:
 Nominal voltage.
 Terminals integrity.
 Protection fuse for voltage inputs (recommended maximum external fuse size is 40 A).
 External switch or circuit breaker must be included in the installation for disconnection of the
devices’ power supply. It must be suitably located and properly marked for reliable
disconnection of the device when needed.
 Proper connection of communication terminals.