MX250 Microprocessor Controller
At a Glance
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Rating Range
Switch Dependent
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Transfer Type
Application Dependent
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Switch Type
Application Dependent
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Undervoltage Dropout for Source 1 and Source 2
75-98% of nominal
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Overview
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.
Technical Summary
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| Rating Range |
Switch Dependent |
| Transfer Type |
Application Dependent |
| Switch Type |
Application Dependent |
Controller Specifications
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| 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 |
Standard Equipment:
Performance
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ESD immunity test per EN61000-4-2 Class B(Level 4)
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Electrical fast transient/burst immunity test perEN61000-4-4
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Conducted and Radiated Emissions per EN55022Class B (CISPR11) (Exceeds EN55011 & MILSTD461 Class 3)
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Voltage dips and interruption immunity EN61000-4-11
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Conducted immunity test per EN61000-4-6(ENV50141)
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Ringing wave immunity per IEEE 472(ANSIC37.90A)
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Surge immunity test per EN61000-4-5 IEEE C62.41
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UL, CSA and IEC listed
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Radiated RF, electromagnetic field immunitytest per EN61000-4-3 (ENV50140) 10v/m
User Friendly Operation
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Weather and tamper resistant touchpad
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Through-the-door programming and display
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Multipurpose display: LEDs for continuous monitoring of switch position and source availability; a four line by twenty character LCD display for settings, functions, programming and annunciation
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Simplified keypad entry – menu-driven system is designed for ease of use
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Built-in diagnosis with displays for ease of troubleshooting
Additional Features
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User settings are unaffected by power outages
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Built-in programmable exerciser uses separate microcontroller with independent battery back-up to serve as clock/calendar – battery failure will not affect switch operation
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Built-in electrical operator protection
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Inputs are optoisolated for high electrical immunity to transients and noise
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Source connection and transfer data logging
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Separate line voltage components for controller isolation
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Watchdog circuit for microprocessor operation
Optional Equipment:
