Specifications

Power Circuits Softstart UK
6. Power Circuits
6.1. Motor Connection
LV-DS soft starters can be connected to the motor in-line or inside delta (also called three-wire and six-wire
connection). When connecting in inside delta, enter the motor full load current (FLC) for parameter 1A. The
LV-DS will automatically detect whether the motor is connected in-line or inside delta and will calculate the
correct inside delta current level.
• Testing the Installation
The LV-DS can be connected to a small motor for testing. During this test, the soft starter's control input and
relay output protection settings can be tested. This test mode is not suitable for testing soft starting or soft
stopping performance.
The FLC of the test motor must be at least 2% of the soft starter's minimum FLC (see Minimum and Maximum
Current Settings on page 8).
NOTE
When testing the soft starter with a small motor, set parameter 1A Motor Full Load Current to the
minimum allowable value.
Models which are internally bypassed do not require an external bypass contactor.
• In-line installation, internally bypassed
6/T3
2/T1
5/L3
3/L2
1/L1
13
14
4/T2
E
KM1
KM1 F1
M
3
KM1
Main contactor (optional)
F1
Semiconductor fuses
(optional)
• In-line installation, externally bypassed
Non-bypassed models have dedicated bypass terminals, which allow the LV-DS to continue providing protection
and monitoring functions even when bypassed via an external bypass contactor.
The bypass contactor must be connected to the bypass terminals and controlled by a programmable output
configured to Run (see parameters 7A~7I).
KM1
Main contactor (optional)
KM2
Bypass contactor (external)
F1
Semiconductor fuses
(optional)
NOTE
The bypass terminals on LV-DS-0255C are T1B, T2B, T3B. The bypass terminals on
LV-DS-0360C ~ LV-DS-1600C are L1B, L2B, L3B.
The fuses can be installed on the input side if required.
16/64 710-15797-00A – LV-DS User Manual