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NOTES:
1. Contactors 2M and S are mechanically interlocked.
2. Transition resistor fault protector (TRFP) is preset to trip if transition contactor
(1A) remains energized for longer than one second.
3. When optional phase loss reversal relay (PMR) or phase loss, phase reversal,
overvoltage, undervoltagerelay (PMRVR)is not provided,terminals 3-13Aand
3-13B are jumpered together.
4. When optional ground fault is not provided, terminals 3-13B and 3-13C are
jumpered together.
5. Thisoil pumpcircuit breaker andterminal boardTB7 areprovided onlyon start-
ers for centrifugal machines.
6. POT to be adjusted to 24 v at rated line voltage.
7. CT4 and CT5are provided only when the optional watt transducer is provided.
8. These 3 wires to the ammeter switch are connected together only when the
optional 3-phase ammeter is not provided.
9. PMRTR is provided only if the optional phase loss phasereversal relay (PMR)
is provided. The combination PMRVR has an internal time delay and does not
require PMRTR.
10. Connections on the above schematic are numbered tomatch the markings on
the control wires within the starter. Wires entering terminal boards are marked
with the terminal number.
11. Oil pump AUX. contact not supplied on screw machines.
NOTE: Optional features are indicated by bold dotted boxes.
Yellow wires remain energized when main disconnect is off.
Fig. 51 — Typical Wye-Delta Unit Mounted Starter Wiring Schematic (cont)
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