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MX 250 Series Microprocessor Controller
L O A D D I S C O N N E C T T D
P R E X F R
T I M E R E M A I N I N G 0 4 : 0 2
M O R E
Entelli-Switch 250
More Enhanced Features
• Available in all transfer modes:
~ Open, Delayed & Bypass/Isolation
~ Closed (with newly integrated
transition control)
• User-friendly programmable engine
exerciser, used for the engine gen-
erator with or without load, at any
interval in a one-year period
• Controller can be configured
to any voltages for worldwide
application
• 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,
paralleling 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
• T3/W3 elevator pre-signal.
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
• Extensive 2/5/10 Warranty
PB - 5066
•
Page 4
Enhanced Display and Settings
LED s are used in a recognizable line configuration for continuous monitoring of switch
position. The LCD display shows source availability, exercise time delay operation and
system source condition. A simplified adjustment is featured for voltage, frequency and
time delay settings.
The control operates off a 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; 3-phase voltage and frequency sensing of Source 2, factory
standard setting 90% pickup voltage, 95% pickup frequency. All factory settings are
operator adjustable.
A test function is standard (fast test/load/no load) to simulate Source 1 failure -
automatically bypassed should Source 2 fail.
Performance Features
• UL , CSA and IEC listed
• Ringing wave immunity per IEEE
472 ( ANSI C 37.90 A )
• Conducted and Radiated Emissions
per EN 55022 Class B
(CISPR 11) (Exceeds EN 55011 &
MILSTD 461 Class 3)
• ESD Immunity test per EN 61000-4-2
Class B (Level 4)
• Radiated RF , electromagnetic
field immunity test per
EN 61000-4-3 ( ENV 50140) 10v/m
• Electrical fast transient/burst
immunity test for EN 61000-4-4
• Surge immunity test per
EN 61000-4-5 ( IEEE C62.41)
(1.2 x 50μs, 0.5 to 4 kV)
• Conducted immunity test per
EN 61000-4-6 ( ENV 50141)
• Voltage dips and interruption
immunity EN 55011 :2009+A1 :2010
Technical Benefits
• Separate line voltage components
for controller isolation
• Inputs optoisolated for high electrical
immunity to transients and noise
• Built-in electrical operator protection
• Simplified maintenance – major
components are easily replaceable
• Close differential under-voltage
sensing of the normal source
• Voltage and frequency sensing
of the emergency source
(all settings are adjustable)
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