ATS MX Contactor

Cat MX250 Microprocessor Controller

The MX250 microprocessor is standard with the entire CTS product family. The MX250 Series includes all the standard features of the MX150 Controller while offering expanded programmability and field adaptability. The high reliability and ease of unattended operation makes it ideal to use in a wide range of mission critical applications.

The MX250 microprocessor

is standard with the entire CTS product family

The High Reliability

and ease of unattended operation makes it ideal to use in a wide range of mission critical applications

Specifications

Technical Summary

Rating Range	Switch Dependent
Transfer Type	Application Dependent
Switch Type	Application Dependent

Controller Specifications

Undervoltage Dropout for Source 1 and Source 2	75-98% of nominal
Undervoltage Restore for Source 1 and Source 2	85-100% of nominal
Underfrequency Dropout for Source 1 and Source 2	90-100% of nominal
Delay for Engine Cool Down (U)	0-60 minutes
Delay Transfer to Nonpreferred Source (W)	0-5 minutes
Delay NeutralTransition Time Delays (DT,DW)	0-10 minutes
Storage Temperature	(-30˚C - 75˚C ), -22˚F - 167˚F
Operating Temperature Ambient	40 - 400 amp molded shell (-20˚C to 65˚C) , -4˚F to 149˚F 40 - 4000 amp all others (-20˚C to 60˚C), -4˚F to 149˚F

MX250 Microprocessor Controller Spec Sheet

Download (PDF)

Benefits & Features

Features and benefits

Available to support ALL transfer modes:
–Open, Delayed and Closed Transition
User-friendly programmable engine exerciser,with or without load, at ANY interval in a one-year period
A wide variety of operating voltages available in a single controller for most domestic and international applications
Real-time display of ATS status, including active timer(s)
Multiple levels of user-defined password protection
Serial communications allowing connectivity with other ATS's, Caterpillar® Switchgear, and SCADA systems
Time-tested synchronous logic automatically measures phase angle and frequency allowing disturbance-free transfer
Unsurpassed statistical ATS/System monitoring available in real-time
Elevator pre-signal contacts automatically bypassed if the selected source fails, minimizing time an elevator is without power
Universal Motor Disconnect (UMD) sends a pre-signal, post-signal or both to any motor control center. Not bypassed in an outage,the UMD ensures safety in the event of a single phase loss
Voltage unbalance detection standard
Also includes all standard MX150 features
Back-lit/temperature compensated LCD display (includes the display of source voltage and frequency, exercise time, delay options and source condition)
Close differential 3-phase under-voltage sensing of source 1, factory standard setting 90% pickup, 80% dropout; under-frequency sensing of source 1 factory setting 95% pickup;voltage and frequency sensing of source 2,factory standard setting 90% pickup voltage,95% pickup frequency.
All factory settings are operator adjustable.
LED indicators for ATS position and source availability
Plant exerciser clock (configured for 1, 7, 14 or 28 day run selections)
Built-in time delays with count-down display
Push button to bypass time delay transfer/retransfer
Transfer/commit/no commit selection In-phase monitor
Event logging (last 16 events)
A test is standard (fast test/load/no load) to simulate source 1 failure – automatically bypassed should source 2 fail.

Cat MX250 Microprocessor Controller

Specifications

MX250 Microprocessor Controller Spec Sheet

Benefits & Features

Cat MX250 Microprocessor Controller

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Cat MX250 Microprocessor Controller ATS MX Contactor