CHAPTER 1: INTRODUCTION
SPECIFICATIONS
MX350 AUTOMATIC TRANSFER CONTROL SYSTEM – INSTRUCTION MANUAL
1–7
THD ALARM (CURRENT/VOLTAGE)
Pickup level:...........................................................0.1% to 100.0% in steps of 0.1% (programmable)
Time delay:.............................................................0 to 65535 seconds in steps of 1
OVERCURRENT (PER PHASE/NEUTRAL)
Pickup level:...........................................................0.01 to 2.00 × Nominal Current in steps of 0.01%
(programmable)
Time delay:.............................................................0 to 65535 seconds in steps of 1
User interface specifications
GRAPHICAL CONTROL PANEL
Size: ...........................................................................height 102mm, width 153mm, depth 35mm
LCD: ...........................................................................89 mm (3.5-inch) colour, 320 by 240 pixels
LED indicators: .....................................................7 LEDs
Pushbuttons:.........................................................Alarm Reset, Test, Ctrl, Info, plus 11 LCD screen display
control keys
Ports:.........................................................................USB 2.0 type Mini-B for laptop computer connection
Metering and monitoring specifications
EVENT RECORDER
Capacity: .................................................................256 events
Data storage:........................................................non-volatile memory
FREQUENCY METERING
Range: ......................................................................40.00 to 70.00 Hz in steps of 0.01
Accuracy:................................................................±0.05 Hz
POWER METERING
Real power range: ..............................................–2000.0 to 2000.0 kW in steps of 0.1
Apparent power range:....................................0.0 to 2500.0 kVA in steps of 0.1
Accuracy:................................................................±2.0% of full scale with 5 A CT
POWER FACTOR METERING
Range: ......................................................................–0.99 to +0.99 in steps of 0.01
Accuracy:................................................................±0.05
Inputs specifications
CONTROL VOLTAGE INPUT
Input range:...........................................................60 V to 300 V AC
Nominal frequency: ...........................................50 or 60 Hz
DIGITAL INPUTS
Nominal input voltage:.....................................24 V DC
Recognition time:................................................2 cycles
Continuous current draw:...............................4 mA
Type:..........................................................................opto-isolated inputs
External switch: ...................................................wet contact
CALCULATION METHOD
( [I
M
- I
AV
] / I
AV
) x 100%
Where
:
I
AV
= average phase current
I
M
= current in a phase with maximum deviation from I
AV
