Rail 350
Contents
1. Operating Manual Page 11 Standard Connections P1 P2 L3 i To Load V2 lit 11 12 12 13 l3 3 Phase High Voltage HV Vn To Load P1 P2 LI S1 S2 SHEE H o L N Vn V1 V2 V3 i 1 12 2 13 I3 Single Phase a 8 8 Page 12 Rail350 Operating Manual Installation ee a SSS EE A 7 Specification INPUTS System 3 Phase 3 or 4 Wire Unbalanced Load Voltage Un 400 230V 3 Phase 3 or 4 Wire 110 63V amp 208 120V optional Others to order Current In 5A from external CTs 1A optional Fully isolated Input from Voltage Output Current Transducers Optional Measurement Voltage 50 to 120 Range Current 0 2 to 120 Frequency Range Fundamental 45 to 65Hz Harmonics Up to 30th harmonic at 50Hz Individual to the 15th Burden Voltage lt 0 1VA per phase Current lt 0 1VA per phase Overload Voltage x4 for 1 hour Current x40 for 0 5 second max DISPLAY Type Custom Supertwist LCD Data Retention 10 years min Stores kWh amp Meter set up Format 8 x 6 66mm high digits with DPs amp 3 2mm legends Scaling Direct reading User programmable CT amp VT CT Primary programmable from 5A to 25kA VT primary programmable from 11V to 440kV Legends Wh kWh MWh etc depending on user settings AUXILIARY SUPPLY Standard 230V 50 60 Hz 15 Options 110V 50 60 Hz 15 Load 2VA max Overload x1 2 continuous ACCURACY All errors 1 digit kWh Better than Class 1 per EN 62053 21 amp BS 8431 kvarh Better than Class 2 p2. Rail350 Operating Manual January 2010 Safety SSS l 1 Safety This instruction sheet gives details of safe installation and operation of the Rail350 electricity meter Safety may be impaired if the instructions are not followed Labels on each meter give details of equipment ratings for safe operation Take time to examine all labels before commencing installation Safety symbols on the meter have specific meanings Refer To User Manual Risk of Electric Shock WARNING The meter contains no user serviceable parts Installation and commissioning should only be carried out by qualified personnel Further information is available at htip www ndmeter co uk Sai ae eee See SSS SS Page 2 Rail350 Operating Manual Operation 2 Operation 2 1 Energy Displays Press H to select kWh Rvarh and Hours Run display pages Active Energy Register Reactive Energy Register Hours Run The Hours Run register accumulates the total time during which the average 3 phase load current exceeds a preset level This is always displayed with a resolution of 0 1hour The percentage level of 11 12 13 at which the Hours Run register accumulates is user programmable from 1 to 100 of full scale current Press H and FE together and hold for 2 seconds to reset the hours run register Scaling of the energy registers is set by the nominal input currents and voltages and remains constant during operation of the meter Energy registers w
3. e changes to programmed parameters are allowed This is only required if a Security Code greater than zero is set via serial communications This is then stored in non volatile memory during power interruptions 4 Digit Security Code To Enter A Security Code Press El Or El to change each digit Lowest significant digit first Press El to select next most significant digit When a valid code is input the programming menu is displayed To change a Programmable Value Press Ei Or E until the required value is set To Move to The Next Setting Press Ei until the next page in the list is displayed Parameters are set in the following order Program Menu Pages Current Transformer Primary Nominal Line Line V or PT Primary Output Pulse Rate Pulse On Time Pulse Output Test Rail350 Operating Manual Page 5 Programming Hours Run Trip Point Percent Amps True 3 Phase Measurement Mode CT Auto Rotation Mode Changes Are Stored to Non Volatile Memory After the last parameter is set the nevv values are stored and the meter continues to measure vvith the new settings 3 2 Fine Adjust CT Primary and Nominal Voltage settings are selected from a table of preferred values This reduces the time to program these parameters to industry standard values Fine Adjust Mode allows values other than those provided by the default tables to be set To enter exit Fine Adjust Mode Hold ba and El together fo
4. ent Transformer CT on its respective cable becomes irrelevant It is therefore possible to pass the cable through the centre of the CT in either direction In this mode current direction is ignored and all power is assumed to be feeding a load import When CT Auto Rotation Mode is de selected True Rotation Mode current direction is monitored and measurement of import and export power is provided In both modes it is essential to place each CT on the correct phase conductor associated with the relevant phase voltage Therefore link CT1 with V1 CT2 with V2 CT3 with V3 PowerRail350 meters are normally supplied with CT Auto Rotation Mode selected In order to detect Positive and Negative power values in all four quadrants it is necessary to de select CT Auto Rotation Mode In the programming Menu Press ba or Ha to toggle between CT Auto Rotation Mode and True Rotation Mode CT Auto Rotation Mode True Rotation Mode NOTE CT Auto Rotation Mode is not available when Balanced Voltage Mode is selected as all Power Factors are assumed to be unity and current phase and direction is ignored a Page 8 Rail350 Operating Manual Programming 4 Display Scaling The units Wh kWh or MWh and the position of the decimal point for the energy povver displays are automatically set dependant on the CT and Un settings for the meter The nominal 3 phase input for the meter is defined as Wnom V3 x Un x CT Whe
5. er EN 62053 23 amp BS 8431 kW Better than Class 0 25 IEC 60688 kvar Better than Class 0 5 IEC 60688 Amps amp Volts Class 0 1 IEC 60688 0 01In 1 2In or 0 1Un 1 2Un PF 0 2 0 05In 1 2In and 0 2Un 1 2Un Neutral Current Class 0 5 IEC 60688 0 05In 1 2In PULSE OUTPUTS Function 1 Pulse per unit of energy Scaling Settable between 1 amp 1000 counts of kWh register Pulse Period 0 1 sec default Settable between 0 1 and 20 sec Rise amp Fall Time lt 2 0ms Type N O Volt free contact Optically isolated BIFET Contacts 100mA ac dc max 100V ac dc max Isolation 2 5RV 50Hz 1 minute MODBUS Serial Comms Bus Type RS485 2 wire Ov 12 Duplex unit load Protocol MODBUS RTU with 16 bit CRC Baud Rate 4800 9600 or 19 200 User settable Address 1 247 User settable Latency Reply within 250ms max Command Rate New command within 5ms of previous one GENERAL Temperature Operating 10 C to 55 C Storage 25 C to 70 C Humidity lt 75 non condensing Environment IP20 MECHANICAL Terminals Rising Cage 4mm2 12 AWG cable max Enclosure DIN 43880 6 Modules Wide Material Noryl with fire protection to UL94 V O Self extinguishing Dimensions 106 x 90 x 58mm Cut out 106 x 45mm Weight 250 gms SAFETY Conforms to EN 61010 1 Installation Category III Rail350 Operating Manual Page 13
6. he PowerRail350 may be connected to a single voltage source in place of the three phases normally required for full accuracy measurement When Balanced Voltage Mode is enabled the voltage measured on phase 1 is copied to phases 2 amp 3 and all three power factors are assumed to be unity 1 00 In this mode the voltage connected to phase 1 on the meter may be fed from any of the 3 Phase system voltages This connection is valid for loads with a near unity power factor PF 0 95 equates to an error of 5 and balanced 3 Phase voltages The combination of Split Core Current Sensors and Balanced Voltage Mode allows for rapid commissioning where access cannot be made to 3 Phase terminations At a later date when access is possible for example during planned maintenance the meter may be connected safely to the 3 Phase voltages and Balanced Voltage Mode de selected Press ba or El to toggle between Balanced Voltage Mode and True 3 Phase Measurement Mode True 3 Phase Measurement Mode Balanced Voltage Mode In Balance Voltage Mode some display menu pages are removed as they have little or no meaning and voltage is displayed as Voltage Display in Balanced Voltage Mode Single Phase kW Power Factor and kvarh displays are removed while Balanced Voltage Mode is enabled Naa aaa Rail350 Operating Manual Page 7 Programming o l 3 9 CT Auto Rotation Mode When CT Auto Rotation Mode is selected the orientation of each Curr
7. ill each accumulate from zero to 99 999 999 then restart from zero 2 2 Voltage Displays V Press El to select from the follovving displays Phase n Voltages 1 3 Line Line Voltages 1 3 2 3 Current Displays Press BH to select from the follovving displays Phase 1 3 Current Rail350 Operating Manual Page 3 Operation 2 4 Povver Displays Press Hi to select from the follovving displays System Active Povver Frequency Hz Phase 1 voltage System Povver Factor C Capacitive Phase 1 3 Active Povver Phase 1 3 Povver Factor C Capacitive 2 5 Pulse Outputs Two isolated pulse outputs are provided for connection to external systems such as Building Energy Management Systems BEMS data loggers remote counters etc Pulse 1 is associated with the active energy kWh register and Pulse 2 with the reactive energy kvarh register A single pulse occurs for each unit of energy on the display eg 1 pulse per 0 1kWh The pulse rate amount of energy associated with each pulse and pulse length may be set to suit the external system 2 5 1 Pulse LEDs Light emitting diodes LEDs on the front panel of the instrument remain ON during each associated output pulse Pulse Output Indicators Page 4 Rail350 Operating Manual Programming 3 Programming 3 1 Programming Menu To enter programming mode V Hold El and Ba together for 5 Seconds A Security Code may be required befor
8. r 2 Seconds vvhile setting CT or Un Fine Adjust Mode is indicated by a decimal point immediately after the parameter type ie CT or Un 3 3 CT Preferred Values Table Amps 5 10 15 20 30 40 50 60 75 80 100 125 150 200 250 300 400 500 600 800 1000 1200 1250 1500 1600 2000 2400 2500 3000 3500 4000 4500 5000 5500 6000 6500 7000 7500 8000 8500 9000 9500 10000 10500 11000 11500 12000 12500 13000 13500 14000 14500 15000 15500 16000 16500 17000 17500 18000 18500 19000 19500 20000 20500 21000 21500 22000 22500 23000 23500 24000 24500 25000 3 4 PT Preferred Values Table Volts 11 40 48 100 110 208 400 480 600 800 1000 1100 2200 3300 4000 4400 6600 7500 10000 11000 15000 22000 25000 33000 66000 132000 220000 440000 3 5 Pulse Rate Selection Table Counts 1 2 5 10 100 1000 3 6 Pulse On Time Selection Table 100ms 200ms 500ms 1S 2s 3s 5s 10s 20s Page 6 Rail350 Operating Manual Programming 3 7 Pulse Output Test This feature allows the pulse output hardware and external system connections to be commissioned without a measured load The LCD shows Pto off and Ptr run and the number of test pulses The test pulse rate is set automatically dependant on the programmed pulse length maximum 0 5Hz Press ba to start stop the test pulses on both outputs Press H and si together to stop the test pulses and simultaneously reset the test counter 3 8 Voltage Input Mode Selection In Balance Voltage Mode t
9. re Un is the nominal Line Line voltage or PT primary 10V 55RV CT is the current transformer nominal primary 10A 25kA Un and CT are set in programming mode The display pages are scaled as follows Amps Volts gt 9 000 V 0 01 kV Resolution Resolution 0 1 MW Mvar 1 MWh Mvarh Nee eee eee Rail350 Operating Manual Page 9 Display Scaling ee ere a a a d S 5 Installation 5 1 Mounting On A Rail The Rail350 conforms to DIN 43880 6 Module Wide The unit is therefore compatible with a number of standard distribution systems with 45mm cut outs The meter should be mounted on a 35mm symmetrical Top Hat DIN rail of minimum length 106mm 5 2 Pulse Output Connection The pulse outputs take the form of isolated volt free normally open contact pairs The contacts are isolated from all other circuits 2 5kV 1minute and at 50V from pulse to pulse 2 The pulses can be used as an input to a remote counter pulse logger building energy management system etc Pis2 Pis1 Pulse Output Connections eee eee eee SSS SSS Page 10 Rail350 Operating Manual Installation 6 Standard Connections Vn P1 P2 5 eee FT l L A a a sli O So oaee A d e L1 L mm S1 2 0 YO C Aje 8 L9 L N Vn V1 V2 V3 Mt It 12 2 13 I3 3 Phase 3 or 4 Wire Optional Neutral P1 P2 EE O L2 m gt me le Bele ello L N Vn V1 V2 V3 M 1 2 I2 13 I3 3 Phase 3 Wire Rail350
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