2015/01/23 Caterpillar

Engine:

C18 (S/N: ZKB1-UP)

C9 (S/N: X3R1-UP)

Generator Set:

3406 GEN SET (S/N: NKM1-UP)

3406C GEN SET (S/N: ZKC1-UP; C2G1-UP; C5G1-UP; C8G1-UP; C2Y1-UP)

3456 GEN SET (S/N: C1G1-UP; C3G1-UP; C4G1-UP; C2T1-UP)

C15 GEN SET (S/N: T4A1-UP; ZKA1-UP; C5E1-UP; STG1-UP; C5H1-UP; C5L1-UP; NKL1-UP; X4R1-UP; CYY1-UP)

C18 GEN SET (S/N: C6C1-UP; G4C1-UP; N1C1-UP; N1D1-UP; STD1-UP; DKE1-UP; PEJ1-UP; NKK1-UP; NKM1-UP; STM1-UP; EKW1-UP; M1Y1-UP; M1Z1-UP)

C18 MARINE GS (S/N: GBM1-UP)

C9 GEN SET (S/N: C9E1-UP)

Petroleum Engine:

C15 PET GS ENG (S/N: PET1-UP)

Description of Change: A new varistor is now available for certain engines and generator sets that are listed above.

Additional Application Recommendation - Configure the application switch gear so that paralleling occurs at lagging power factor and configure protective relaying to prevent generator operation outside of generator capability curve. Configure application switch-gear to parallel within synchronization limits +/-0.1 Hz, +/-5% phase volts, +/-10 degrees phase angle. Configure application controls and protective relaying circuitry to not allow generator to bus breaker closure while generator is not operating.

Adaptable To: The new 241-4662 Varistor is a direct replacement for the former 241-4620 Varistor .

Refer to Table 1 for the required parts.