KMB NOVAR 2600, Operating Manual

Page: 9 / 96

NOVAR 2600 Operating Manual
2. Installation
2.1.1 Physical
The instrument is built in a plastic box to be installed in a distribution board panel. The instrument’s
position must be fixed with locks.
Natural air circulation should be provided inside the distribution board cabinet, and in the instrument’s
neighbourhood, especially underneath the instrument, no other instrumentation that is source of heat
should be installed.
2.2 Instrument Connection
2.2.1 Power Supply
The instrument requires an AC or DC voltage power supply as specified in technical parameters. The
supply inputs are isolated from other circuits of the instrument.
It is necessary to connect an auxiliary supply voltage in the range as declared in technical
specifications table to the terminals
AV1 ( No. 9, L ) and AV2 ( No.10, N ). In case of DC supply
voltage the polarity of connection is generally free, but for maximum electromagnetic compatibility the
grounded pole should be connected to the terminal
AV2 .
The supply voltage must be connected via a disconnecting device ( switch - see installation diagram ).
It must be situated directly at the instrument and must be easily accessible by the operator.
The
disconnecting device must be labelled as the disconnecting device of the equipment. A two-pole
circuit breaker with the C-type tripping characteristics rated at 1A may be used for the disconnecting
device; however its function and position must be clearly marked (symbols „O" and „I" according to EN
61010 – 1). If one of the supply signals is neutral wire N (or PEN) usually a single breaker in the line
branch is sufficient.
Since the instrument’s inbuilt power supply is of pulse design, it draws a momentary peak current on
powerup which is in order of magnitude of amperes. This fact needs to be kept in mind when selecting
the primary protection devices.
Fig. 2.1: Typical star (3Y) connection, mains 3 x 230/400 V
9