Rail 310 Operating Manual
Contents
1. Rail310 An external fuse must be fitted External Auxiliary Supply fuses should be rated No of Rail310 Units Fuse Rating 11 20 250V 1A Anti Surge 20 50 250V 2 5A Anti Surge Use multiple fuses as above a Page 14 Rail310 Operating Manual Specification U 7 Specification INPUTS System 3 Loads with a common neutral Voltage Un Standard 3 x 230Vac Optional 3 x 120Vac Current In Standard 5A from external CTs Optional 1A from external CTs Optional 0 333V from external current sensors Measurement Voltage 50 to 120 Range Current 0 2 to 120 Frequency Range Fundamental 45 to 65Hz Harmonics Up to 30th harmonic at 50Hz Burden Voltage lt 0 1VA per meter Current lt 0 1VA per meter Overload Voltage x2 for 1 hour Current x20 for 0 5 second max DISPLAY Type Custom Supertwist LCD Data Retention 10 years min Stores kWh amp Meter set up Format 8 x 9mm high digits with DPs amp 2 8mm legends Scaling Direct reading User programmable CT CT Primary programmable from 5A to 25 000A Legends kWh MWh etc depending on user settings AUXILIARY SUPPLY Standard 230V 50 60 Hz 15 Options 115V 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 kW Better than Class 0 25 IEC 60688 Amps amp Volts Class 0 1 IEC 60688 0 01In 1 2In or 0 1Un 1 2Un PF Modbus Only 0 2 0 05In 1 2In and 0 2Un 1 2Un PULSE OUTPUTS Function2. next most significant digit When a valid code is entered the first page of the programming menu is displayed Programming Menu First Page Rail310 Operating Manual Page 7 Programming 3 2 Setting The CT Primary Current External current transformers CTs are required to reduce large currents to a level accepted as inputs to the meter The Rail310 meter displays require scaling to match the primary current rating of the external Current Transformers used Each meter in the unit uses the same CT primary current rating Press w or g to select the Next Previous CT Primary current from the preferred list Setting The CT Primary Current 3 2 1 Fine Adjust CT Primary If values other than those found in the preferred list are required use Fine Adjust Mode a Hold and together for 2 Seconds to select deselect Fine Adjust Mode CTF Press Pi or i to increment the CT Primary current in steps of 5A I V When the desired CT primary current has been set press to move to the next parameter 3 3 Setting The Pulse Output Rate The amount of energy associated with each momentary pulse output may be programmed A single setting is required to scale all three Meter pulse outputs Setting The Pulse Output Rate Press Pi or gs to select the Next Previous Pulse Rate from the preferred list I V When the desired Pulse Rate has been set press to move to the next parameter Page 8 Rail310 Operating Manual Programmi
3. 1 Pulse per unit of energy Pulse Rate Settable between 1 amp 1000 counts of kWh register Pulse On Time 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 0 5W Max Load Isolation 2 5kV 50Hz 1 minute MODBUS Serial Communications Optional 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 Ill Rail310 Operating Manual Page 15
4. PowerRail 310 Operating Manual February 2010 ik i atl b hal j i i Metering Solutions www ndmeter co uk Northern Design Bradford UK XX i p m Safety SSS l 1 Safety This instruction sheet gives details of safe installation and operation of the Rail310 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 Coe aaa SS ES eS eee See SSS Page 2 Rail310 Operating Manual Operation 2 Operation 2 1 Three Meters in One Box The Rail310 consists of three multi function electricity meters in a single enclosure The unit independently monitors up to three single phase loads providing a clear digital displays of kW kWh volts and amps Three pulse outputs are also available allowing each kWh register to be remotely monitored logged An RS485 Modbus RTU serial communications link may be optionally fitted providing multi function meter readings to remote SCADA systems 2 2 Energy Displays Press Pa to select the kWh register fo
5. d 1 S1 S2 gD Supply 1 N Meter 1 Measurement Input Connections Current Transformer P1 P2 Y i 9 L2 Load 2 i Si 2 Supply 2 N Meter 2 Measurement Input Connections Current Transformer P1 P2 Y i a Load 3 i S1 S2 A Supply 3 N Meter 3 Measurement Input Connections Rail310 Operating Manual Page 13 Standard Connections L A Supply N 10 11 Meters 1 3 With Common Voltage Input 6 1 1 Voltage Measurement Input Fuses It is recommended to fit a fuse circuit breaker to each voltage measurement input This allows the Rail310 to be isolated should maintenance be required Each meter voltage measurement input takes less than 1mA at nominal 230V Recommended fuses should be rated at 250V 100mA Type T 6 1 2 Common Neutral The voltage measurement inputs must be sourced from a supply with a common neutral point Suitable circuits include several feeders off a single phase circuit or individual phases of a 3 phase 4 wire supply 6 2 Auxiliary Meter Supply The Rail310 requires an ac supply to power the measurement circuit and display This can be any ac supply meeting the specification stated on the units rating label It is acceptable to cross connect the meter supply with one of the voltage measurement inputs providing the specified ratings are not exceeded Rail310 Unit Auxiliary Supply 6 2 1 Auxiliary Supply Fuse The auxiliary supply is not fused internally in the
6. lse 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 is programmable and may be set to suit the external system Pulse outputs take the form of a volt free contact closure Pulse 1 provides a momentary short circuit between contacts C and P1 each time Meter 1 kWh register increments a set number of times Pulse 2 provides a momentary short circuit between contacts C and P2 each time Meter 2 kWh register increments a set number of times Pulse 3 provides a momentary short circuit between contacts C and P3 each time Meter 3 kWh register increments a set number of times 2 5 1 Pulse LED A Light emitting diode LED on the front panel of the instrument remains ON during each output pulse of the meter which is currently shown on the LCD n Pulse Output Indicator Co a SS eee See SSS Page 6 Rail310 Operating Manual Programming 3 Programming 3 1 Programming Menu To enter programming mode Hold lt ara till ocether for 5 Seconds A Security Code may be required before 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 the Security Code Press pa or g to change each digit Lowest significant digit first Press to select
7. ng E 3 4 Setting The Pulse On Time The length of time in seconds each momentary pulse output remains ON short circuit may be programmed A single setting is required to scale all three Meter pulse outputs Setting The Pulse Output Rate Press pa or p to select the Next Previous Pulse On Time from the preferred list INAY When the desired Pulse Rate has been set press to move to the next parameter Note When selecting a long Pulse On Time it may be necessary to reduce the Pulse Rate to prevent pulses appearing permanently ON eee e ee SS Rail310 Operating Manual Page 9 Programming 3 5 Pulse Output Test Mode This feature allows the pulse output hardware and external system connections to be commissioned without a measured load The test pulse rate is set automatically dependant on the programmed pulse length maximum 0 5Hz Press pa to start stop the test pulses on all outputs Pulse Output Test OFF Mode In this mode no pulses occur on P1 P3 and the display shows the total number of pulses accumulated during testing Pulse Output Test RUN Mode In this mode pulses occur simultaneously on all three outputs with an Pulse On Time set in programming mode above The Pulse Rate is set automatically to be greater than twice the Pulse On Time The display shows the total number of pulses accumulated during testing Press Pa and p together to stop the test pulses and simultaneously reset the test cou
8. nter When the test is complete press to move to the next parameter Note When selecting a long Pulse On Time it may be necessary to reduce the Pulse Rate to prevent pulses appearing permanently ON Page 10 Rail310 Operating Manual Display Scaling 4 Display Scaling The units kWh or MWh and the position of the decimal point for the energy power displays are automatically set dependant on the CT Primary setting for the meter The display pages are scaled as follows CT Display Resolution Rail310 Operating Manual Page 11 Installation E E 5 Installation 5 1 Mounting On A Rail The Rail310 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 contacts The pulse output circuit is isolated from all other circuits at 2 5kV 1 minute The pulses can be used as an input to a remote counter pulse logger building energy management system etc Connect to External System Pis1 Meter Pulse Contacts Pls2 PIs3 Pulse Output Connections eS eee eee See SSS SSS Page 12 Rail310 Operating Manual Standard Connections 6 Standard Connections 6 1 Measurement Input Connections Current Transformer P1 P2 Y i amp L1 Loa
9. r each meter Active Energy Register Meter 1 Active Energy Register Meter 2 Active Energy Register Meter 3 Press a and g together and hold for 2 seconds to simultaneously reset the three kWh registers if this feature is enabled Scaling of the energy registers is set by the nominal input currents and voltages and remains constant during operation of the meter Energy registers will each accumulate from zero to 99 999 999 then restart from zero eee EE aaa SS Rail310 Operating Manual Page 3 Operation 2 3 Current and Voltage Displays I V Press to select from the following displays Meter 1 A 0 1 oS b ant wy ant ant True RMS Amps Meter 1 True RMS Amps Meter 2 True RMS Amps Meter 3 True RMS Volts Meter 1 True RMS Volts Meter 2 True RMS Volts Meter 3 ee Page 4 Rail310 Operating Manual Operation 2 4 kW Displays Press ie to select the instantaneous kW displays for each meter Active Power Meter 1 Active Power Meter 2 Active Power Meter 3 eee EE aaa eee Rail310 Operating Manual Page 5 Operation Ca 2 5 Pulse Outputs Three 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 of Meter 1 Pulse 2 with Meter 2 and Pulse 3 with Meter 3 A single pu
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