92 • Starting Procedure
_____________________________________________________________________________________________
Upon START the voltage and current increase until the current reaches the CURRENT LIMIT value. The
voltage remains at this value until the motor reaches close to nominal speed, where current starts to decrease
and voltage continues to ramp-up to nominal.
8.2.3 Special Starting Using DUAL ADJUSTMENT
Using two st
arting characteristics, the RVS-DN will accelerate using standard characteristics (INITIAL
VOLTAGE, ACCELERATION TIME and CURRENT LIMIT). After transition (tx) (IMMEDIATE relay delay),
voltage to input terminal 8 is switched on using the DUAL ADJUSTMENT characteristic to complete
acceleration.
Perform the following steps:
• To use DUAL ADJUSTMENT automatically, connect IMMEDIATE in series to input terminal 8 as shown in
section
8.2.3.1 below.
• Program IMMEDIATE/SHEAR-PIN relay to IMMEDIATE (default setting) and program RELAY ON DELAY to
tx.
• Program PROG. INPUT #8 to DUAL ADJUSTMENT (default setting).
• Program standard parameters and DUAL ADJUSTMENT parameters as shown in the table below.
Using two starting characteristics, the RVS-DN will accelerate to reach the 200% current limit. After tx voltage
to PROG. INPUT #8 is switched on, using the DUAL ADJUSTMENT characteristic to complete acceleration.
Standard Parameter DUAL ADJUSTMENT Parameter
INITIAL VOLTAGE 10% 25%
ACCELERATION TIME t1 = 2-30 sec t2 = 2-30 sec
CURRENT LIMIT 200% 300-400%
RELAY ON DELAY tx = 1-60 sec. -----
8.2.3.1 Special Starting – Using DUAL ADJUSTMENT – Wiring Diagram
To Next Page
Loading...
Need help?
General
