M-4171 and M-4272 Comparison

M-4172 and M-4272 Comparison

Two Models… Same Performance!

The M-4172 and M-4272 Digital High Speed Motor Bus Transfer System addresses fast (high-speed sync-check), in-phase (high-speed synchronizing), residual (undervoltage), fixed time transfer and manual transfer applications. With Beckwith Electric’s MBT System, all methods are running in parallel, to ensure the best method is used.

Learn more about the differences between the M-4172 and M-4272 below.

 

M-4172

Digital Motor Bus Transfer System for Low Voltage (LV) Switchgear Applications

M-4272

Digital Motor Bus Transfer System for Medium Voltage (MV) and Low Voltage (LV) Switchgear Applications


Application

M-4172

More economical and affordable device designed for Low Voltage switchgear motor bus transfer applications typically found in large industrial and petrochemical facilities.

M-4272

Designed for both Medium Voltage and Low Voltage switchgear motor bus transfer applications in all industry types and utilities.


Inputs

M-4172

6 Inputs

2 dedicated inputs for S1 and S2 breaker status contacts: 52a or 52b

4 programmable inputs

M-4272

18 Inputs

6 dedicated inputs for S1 and S2 breaker status contacts: 52a, 52b and 52sp (TOC)

12 programmable inputs


Outputs

M-4172

8 Outputs

5 dedicated outputs for Trip & Close S1 breaker, Trip & Close S2 breaker and Lockout/Blocking Alarm

3 programmable outputs

M-4272

16 Inputs

5 dedicated outputs for Trip & Close S1 breaker, Trip & Close S2 breaker and Lockout/Blocking Alarm

11 programmable outputs


Power Supply

M-4172

1 standard power supply

1 optional redundant power supply

 

M-4272

2 standard power supplies

 


Trip/Close Circuit Monitors

M-4172

No Trip/Close Circuit Monitors

 

M-4272

Includes Trip/Close Circuit Monitors

 


Size (Height)

M-4172

5.21 inches (3 Rack Units)

 

M-4272

6.96 inches (4 Rack Units)

 


Communications Software

M-4172

Includes M-3871 ISScom

 

M-4272

Includes M-3872 ISScom