M550 GENERAL SPECIFICATIONS

INPUT
Rated Un Direct connected voltages between 57.8
and 600 v.
Standard voltages offered :-
63.5/110 V, 69.3 / 120 V, 120 / 208 V,
220/380 V, 230 / 400 V, 240 / 415 V,
277 / 480 V, for 3 ph 4 w
110 V, 120 V, 380 V, 400 V, 415 V, 440V,
480 V, 3 ph 3 w
Range 2-120% Un
Burden 0.5VA per phase
Overload 1.5 x Un continuous
4 x Un for 1 second
Rated In 1 or 5 amp
Range 0-120%
Burden 0.5VA per phase
Overload 4 x In continuous
50 x In for 1 second
Frequency 50 / 60 Hz nominal range
45/65Hz

SYSTEMS
M550-CT1 Single phase
M550-CT1-3 Single phase 3 wire
M550-CT4 3 phase 3 wire unbalanced load
M550-CT9 3 phase 4 wire unbalanced load
M550-CT2 3 phase 3 wire balanced load
M550-CT3 3 phase 4 wire balanced load

ACCURACY
Specified@ 23 °C 10%-Un 10%-In
Volt Class 0.2% to IEC 688
Amps Class 0.2% to IEC 688
Frequency Class 0.1Hz to IEC 688
Power Factor Class 1.0% to IEC 688
Active Power Class 0.2% to IEC 688
Reactive Power Class 0.2% to IEC 688
Apparent Power Class 0.2% to IEC 688
Active Energy 1% of reading IEC 1036
Reactive Energy 1% of reading IEC 1036

APPROVALS
UL. C-UL, CSA Pending

AUXILIARY
AC voltage 115 or 230 volts (±15%)
DC voltage 12 / 24 / 48 / 110 / 125 volts

RELAY OUTPUT (optional)
Pulsed output W.h or VAr.h or VA.h or A.h User
progammable import or export

COMMUNICATION
Serial communication RS485 output Modbus protocol
Baud Rate Programmable
2400,4800,9600,19200,38400,57600
Parity Odd, Even or No parity
Auto Detection RS485

ENVIRONMENTAL
Working Temperature 0 to +60 deg C
Storage Temperature -30 to +65 deg C
Temperature Coefficient 0.01% per deg C
Relatively Humidity 0-95% non condensing
Warm up time 1 min.
Shock 20G in 3 planes

ENCLOSURE
Fixing Snap on to Din rail
35 x 7.5mm complies with
DIN-EN 50022
Mounting Any position
Enclosure Code Case IP 50 / terminals IP30
Complies with IEC 529
BS5490 DIN 40050

APPLIED STANDARDS
General IEC 688 BSEN60688, BS4889, IEC 359
EMC Emissions BSEN50081/1 Immunity BSEN50082/2
Safety IEC1010, BSEN601010

INSULATION
Test Voltage 4kV RMS 50Hz for 1 min between input, case, auxiliary, RS485 3kV RS485 / 1.5kV Relay
Impulse Test EMC 5kV transient complying with IEC 801/EN 55020 HF
Surge withstand IEC 801 / EN55020 ANSI C37.90A
Interference EHF 2.5kV 1MHz complying with IEC255-4
Protection Class II Complying with IEC348