MOTOR BUS TRANSFER

 

Two Models... Same Performance!

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

 

All transfer methods supported:

Fast Transfer
In-Phase Transfer
Residual Voltage Transfer
Fixed Time Transfer

Application

M-4172   M-4272
More economical and affordable device designed for Low Voltage switchgear motor bus transfer applications typically found in large industrial and petrochemical facilities.   Designed for both Medium Voltage and Low Voltage switchgear motor bus transfer applications in all industry types and utilities.

Inputs

M-4172   M-4272
6 Inputs:
  • 2 dedicated inputs for S1 and S2 breaker status contacts: 52a or 52b
  • 4 programmable inputs
  18 Inputs:
  • 6 dedicated inputs for S1 and S2 breaker status contacts: 52a, 52b and 52sp (TOC)
  • 12 programmable inputs

Outputs

M-4172   M-4272
8 Outputs:
  • 5 dedicated outputs for Trip & Close S1 breaker, Trip & Close S2 breaker and Lockout/Blocking Alarm
  • 3 programmable outputs
  16 Outputs:
  • 5 dedicated outputs for Trip & Close S1 breaker, Trip & Close S2 breaker and Lockout/Blocking Alarm
  • 11 programmable outputs

Power Supply

M-4172   M-4272
1 standard power supply
1 optional redundant power supply
  2 standard power supplies

Trip/Close Circuit Monitors

M-4172   M-4272
No Trip/Close Circuit Monitors   Includes Trip/Close Circuit Monitors

Size (Height)

M-4172   M-4272
5.21 inches (3 Rack Units)   6.96 inches (4 Rack Units)

Communications Software

M-4172   M-4272
Includes M-3871 ISScom   Includes M-3872 ISScom

Sales and Service