Littelfuse MPS - Reactor or Resistor Closed-Transition Starter; Slip-Ring Starter; Reactor or Resistor-Starter Connection; Slip-Ring-Starter Connection

Page 6-10
MPS Motor Protection System Rev. 6-F-022117
Starter Functions
6.8 REACTOR OR RESISTOR CLOSED-TRANSITION
STARTER
Sequence: Fig. 6.5
Connection: Fig. 6.16
Current Transfer: Available
This starter uses a reactor or resistor to provide
reduced-voltage starting and the reactor or resistor
contactor (K1) remains closed during running.
START1 or START2 initiates the starting sequence by
activating Starter RLYA. Starter RLYB activates after the
Stage1 Delay.
FIGURE 6.16 Reactor or Resistor-Starter Connection.
6.9 SLIP-RING STARTER
Sequence: Fig. 6.5
Connection: Fig. 6.17
Current Transfer: Available
The slip-ring starter is a single-stage wound-rotor
starter with a single contactor (K2) controlling the rotor
resistor bank.
START1 or START2 initiates the starting sequence by
activating Starter RLYA. Starter RLYB activates after the
Stage1 Delay.
FIGURE 6.17 Slip-Ring-Starter Connection.