Littelfuse MPS - Typical 3-Wire Control

Page 6-3
MPS Motor Protection System Rev. 6-F-022117
Starter Functions
TABLE 6.2 STARTER SUMMARY
STARTER TYPE
SEQ.
NO.
TIMERS
USED
(1)
START-
CONNECTION
TIMER
NUMBER
(1)
ACTIVE FLA
SETPOINTS
(2)
RELAYS AND CONTACTOR STATUS
(3)
FLA
FLA 2
RLYA
RLYB
RLYC
RLYD
Full-Voltage Non-Reversing
1
4
x
x
Adjustable-Speed Drive
1
4
x
x
Soft-Start
1
4
x
x
Full-Voltage Reversing
2
4
x
x
x
Two-Speed Two-Winding
2
4
x
x
x
x
Reactor or Resistor Closed-
Transition
(4)
3
1,4
1
x
x
x
Slip-Ring
(4)
3
1,4
1
x
x
x
Part-Winding
(4)
3
1,4
1
x
x
x
x
Double-Delta
(4)
3
1,4
1
x
x
x
x
Soft-Start-with-Bypass
(4)
3
1,4
1
x
x
x
Reactor or Resistor Open-
Transition
(4)
4
1,4
1
x
x
x
Two-Winding
(4)
4
1,4
1
x
x
x
x
Wye-Delta Open-Transition
(4)
5
1,2,3,4
2
x
x
x
x
x
Autotransformer Closed-
Transition
(4)
5
1,2,3,4
2
x
x
x
x
Wye-Delta Closed-Transition
(4)
6
1,2,4
2
x
x
x
x
x
x
(1)
TIMERS
1: Stage 1 Delay
2: Stage 2 Delay
3: Stage 3 Delay
4: Start Time
(4)
Current transfer capability when enabled
(2)
FLA SETPOINTS
FLA: Full-Load Current
FLA2: Full-Load Current 2
(3)
RELAYS AND CONTACTOR STATUS
Starter RLYA, Starter RLYB, Starter RLYC, and
Starter RLYD are not automatically assigned. The
user must assign these functions to individual relays.
Status is assignable to any digital input.
FIGURE 6.1 Typical 3-Wire Control.