1 HVACR318 – Advanced Refrigeration Three Phase Three Phase Compressors Three Phase Motors Three Phase Three Phase Compressors Three Phase Motors.

1

HVACR318 – Advanced Refrigeration

Three PhaseThree Phase Compressors

Three Phase Motors

3 PHASE VOLTAGE– Phase A = L1– Phase B = L2– Phase C = L3

3 PHASE VOLTAGE Phase A = L1 Phase B = L2 Phase C = L3

VOLTAGE

L1 VOLTAGE

L2 VOLTAGE

L3 VOLTAGE

TIME

3 PHASE COMPRESSORS and MOTORS

3 PHASE MOTOR and CONTROL CIRCUIT

MAGNETIC MOTOR

STARTER

L1

T2L2

T3

T1L1

L3

M1

M1 OL OL OL

L2

L3

3 PHASE MOTOR CIRCUIT

N

3 PHASE 240 VAC MOTOR

120 VAC CONTROL CIRCUIT

3 PHASE MOTOR WINDINGS and WYE WIRING DIAGRAM

3 PHASE WYE HIGH VOLTAGE WIRING

DIAGRAM

T9 T8

T7

T6 T5

T4

T3 T2

T1

3 PHASE WYE LOW VOLTAGE WIRING

DIAGRAM

T9 T8

T7

T6 T5

T4

T3 T2

T1

3 PHASE DELTA WIRING DIAGRAM

3 PHASE DELTA WIRING HIGH VOLTAGE DIAGRAM

3 PHASE DELTA LOW VOLTAGE WIRING

DIAGRAM

TROUBLESHOOTINGVOLTAGE METER

TROUBLESHOOTINGRESISTANCE (OHM) METER

TROUBLESHOOTINGCURRENT (AMP) METER