Installation
2
Area (m
2
)
Prior to Installation
Check that Motor’s Full Load Ampere (FLA) is lower
than or equal to the starters Full Load Current (FLC)
and that Main and Control voltages are as indicated on
the front panel.
Mounting
• The starter must be mounted vertically, allow
sufficient space above and below the starter
for suitable airflow.
• It is recommended to mount the starter
directly on the rear metal plate for better heat
dissipation.
• Do not mount the starter near heat sources.
• Protect the starter from dust and corrosive
atmospheres.
Note: For harsh environments, it is recommended to
order the starter with Option # 8 – Special Treatment
(printed circuit board coating).
Temp. Range and Heat Dissipation
The starter is rated to operate over a temperature range
of -10ºC (14ºF) to + 50ºC (122ºF). Relative non-
condensed humidity inside the enclosure should not
exceed 95%.
Starter’s heat dissipation is approx. 3 x In (three times
the current in watts).
Example: For a 100A motor, heat dissipation is
approx. 300 watts.
Internal enclosure heating can be reduced through the
use of:
a. Additional ventilation
b. Employing a by-pass contactor.
Additional Ventilation
RVS-DN
General purpose enclosure
Fan on air outlet
RVS-DN
Non-ventilated enclosure
Fan, creating air circulation
Fan
Calculating the enclosure size, for non-ventilated
metallic enclosure:
Where Area (m
2
) - Surface area that can dissipate heat
(front, sides, top).
* Total heat dissipation of the starter and other control
devices in the enclosure.
Note: If the starter is installed in a non-metallic
enclosure, a by-pass contactor must be used.
Short Circuit Protection
Protect the starter against a short circuit by Thyristor
Protection Fuses (see appendix page 44 for I
2
t and
fuses).
Transient Protection
Line transient voltages can cause a malfunction of the
starter and damage to the thyristors. Starters frame
sizes B-E incorporate Metal Oxide Varistors (MOV to
protect from normal line voltage spikes.
For size A, or when higher transients are expected,
additional external protection should be used (consult
factory).
ATTENTION
When Start signal is initiated and a motor is not
connected to load terminals, the Wrong Connection
protection will be activated.
WARNING
1. When main voltage is connected to the
RVS-DN, even if control voltage is
disconnected, full voltage may appear on the
starter load terminals. Therefore, for
isolation purposes, it is necessary to connect
an isolating device before the starter.
2. Power factor correction capacitors must not
be installed on the starters load side. When
required, install capacitors on starter’s line
side.
WARNING
RVS-DN current transformers, although may be
installed outside of the soft-starter with extended
wires, can not be grounded or connected to any other
load except for the RVS-DN itself. Any such
connection may cause damage to the load which was
connected to it or to the RVS-DN itself!
0.12 x Total heat dissipation (Watts)*
–
º
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