Installation Notes
1. Prior to Installation
Check that Motor's Full Load Ampere (FLA) is lower
than or equal to starters Full Load Current (FLC) and
that Mains voltage is as indicated on the front panel.
2. Mounting
X 3
RVS-BX
M
•
The soft 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 of the switchgear for better
heat dissipation.
•
Do not mount the starter near heat sources.
•
Protect the starter from dust and corrosive
atmospheres.
3. Temperature Range and Heat Dissipation
The starter is rated to operate over a temperature range
of –10
º
C (14
º
F) to +40
º
C (104
º
F).
Relative non-condensed humidity inside the enclosure
should not exceed 93%.
As the thyristors are bypassed after the end of
acceleration, the heat dissipation during continuous
operation is Approx. 0.4 x In (in watts).
Example
: When motor's current is 30 Amp, heat
dissipation will be approx. 12 watts.
Internal enclosure heating can be reduced through the
use of additional ventilation.
4. Transient Protection
Voltage spikes can cause malfunction of the starter and
damage the SCRs. When expected, use suitable
protection such as Metal Oxide Varistors (consult
factory for further details).
5. Power Connections
Line voltage must be connected to terminals L1, L2
and L3. Motor must be connected to terminals U, V
and W. Do not interchange line and load terminals as
damage could occur to the equipment.
6. Overload and Short Circuit Protection
The RVS-BX should be protected against a short
circuit by Thyristor Protection fuses.
The recommended I
2
t values are:
RVS-BX type
I²t
RVS-BX 8
400
RVS-BX 17
2000
RVS-BX 31
3000
RVS-BX 44
6000
RVS-BX 58
12000
RVS-BX 72
18000
RVS-BX 85
??????
Caution
Power factor correction capacitors must not be
installed on starter's Load side. When required,
Install capacitors on the Line side.
Warning
When Mains voltage is connected to the starter,
even if start signal has not been initiated, full
voltage may appear on the starter’s load
terminals. Therefore, for isolation purposes it is
required to connect an isolating device (C/B,
switch, line contactor, etc) upstream to the
RVS-BX (on the Line Side).
Built-in Bypass
The RVS-BX incorporates
internal bypass relays
allowing current flow
through the thyristors only
during starting process. At
the end of the starting
process the built-in relays
bypass the thyristors and
carry the current to the
Motor.
Warning
Do not connect any voltage to the control terminals 1
and 2.
Upon stop signal, or in case
of fault, all three bypass
relays will open and stop the motor.
When Ramp-Down potentiometer is set to allow soft-
Stop process, upon stop command, the bypass relays
will open immediately and the current will flow
through the thyristors. The voltage will then be
reduced slowly and smoothly to zero.
4
