Technical GuideCSD 082 Issue 3
5196A Single Phase Credit Meter
01803 393474
Technical Guide
5196 Single Phase Credit Meter
Document CSD 082 Issue 3
15.8.2000
Supplied by: -
Introduction
Purpose
This manual covers the operation and technical aspects of the Single Phase Credit Meter 5196.
Definitions
BS: British Standard
IEC:International Electrotechnical Commission
SI:Statutory Instruments
kWh:Kilo Watt-hours
kVArh: Kilo Volt-Ampere hours reactive
LCD:Liquid Crystal Display
LED:Light Emitting Diode
HHU:Hand-Held Unit
mS: Milli-Second
Reference Standards
1. IEC1036: 1996:Alternating current static watt-hour meters for active energy. (Classes 1 & 2)
2. BS5685: 1979: Part 1:Specification class 0.5, 1.0 and 2.0 Single phase and Polyphase, single rate and multi-rate watt- hour meters.
3. IEC1107:Data Exchange for Meter Reading, Tariff and Load Control. Direct Local Exchange.
4. SI1566: 1998The Meters (Certification) Regulations 1990;
Meter Overview
The meter is a whole current 100A credit meter, capable of measuring kWh and is available with a pulsed output. The meter is approved to IEC1036: 1996 classes 1.0 and 2.0. The meter is sealed for life by a liquid welding process and therefore does not carry an external wire seal.
A character denotes meter version after the model number:
5196A - Single rate only
5196B - Single rate with pulsed output
All meter types feature an IEC 1107 optical port used for meter reading and reprogramming. The metrology LED is incorporated into this port and pulses at a rate of 1000 impulses per kWh.
Operation
Measurement
The Meter is a 220-240Vac, 50Hz, 20/100 Amp Single Phase Credit Meter. It contains a measuring element capable of measuring active (kWh) and reactive energy (kVArh). Dependant on meter version, the meter measures and registers kWh to class 1.0 and KVArh to class 3.0. The metrology LED is incorporated into the Flag port and pulses at a rate of 1,000 impulses per kWh or kVArh for energy registration. For testing purposes this may be switched to give kVArh registration on reactive energy measuring models. All meters offer a test mode, which shows 3 decimal places and is reset when voltage is removed.
Anti-creep
Below starting current, the meter enters into an anti-creep mode. In this state the metrology LED is permanently lit and the registers do not increment. The LED remains lit until the meter current is increased in a forward direction beyond the starting current.
Meter Memory
All register and meter configuration data is recorded in an E2PROM. Registers values are stored to 2 decimal places and are updated every 5 min 20 seconds, also on power fail.
Register Displays
Single rate versions
Single rate meters display the total kWh reading only. The display is configurable to show either whole numbers, 1 or 2 decimal places. The meter is also factory configurable to display either 5 or 6 digits with roll over to zero at 99999 or 999999.
Single rate with kWh and kVArh registration
The single rate meter may be factory configured to measure both active and reactive energy. The two totals are shown on an alternating display as shown below:
Both the above registers may be configured between 0 and 2 decimal places.
Reverse Energy Detection
A configurable option within the meter will alternate a warning message on the display should a fraud attempt be made by running current backwards through the meter. The reverse energy warning message is triggered when the reverse power exceeds a threshold level. This level is factory set and requires a reverse current of 10 amps or greater to flow for a period of 16 seconds. This equates to approx 10 Wh. Once this level is reached the message below will be displayed which can only be reset via the IEC 1107 port.
Reverse Energy Register
A reverse energy register stores the value of kWh recorded by the meter in a reverse direction. The register may be configured as part of the display cycle of the meter. Alternately the register is held in memory and can be read form the meter via the IEC 1107 port. The Reverse energy register may be displayed between 0 and 2 decimal places.
Pulsed Output
The 5196B version of meter has a pulsed output, which is factory configured as follows: -
Output type: Open collector
Max. Voltage:24Vdc.
Max Power:150mW
Pulse duration:100 mS
Pulses/kWh:100
In situations where the pulses are to be collected and measured by a BMS system it is possible to reconfigure the pulse durationpulses/kWh through the IEC 1107 port. Software and Data Probes for this purpose are available from J. W. Instruments.
Meter fixing
The meter is mounted using the two fixing holes found either side of the terminal housing. To aid terminal cover sealing, the screw boss has four raised indicators that should be aligned against the indicator on the cover.
Connections
Terminal arrangement conforms to BS5685, Part1, 1979.
Technical Summary
Construction
The Credit Meter case meets the requirements of BS5685 and is manufactured from following materials: -
Meter Base:Flame Retardant and UV stabilised Polycarbonate
Meter Top:Flame Retardant and UV Stabilised Polycarbonate
Terminal Cover: Flame Retardant and UV Stabilised Polycarbonate
Terminals: Solid Brass extrusion.
System VoltageSingle element meters240Vac Phase to Neutral
230Vac Phase to Neutral
220Vac Phase to Neutral
Supply variation+15% to -20%
Voltage withstand415V continuous
10kV impulse @105J
CurrentDirect connection15-100A Ib/Imax
20-100A
10-60A
Others available on request
BurdensVoltage Circuit @ 230Vac0.9W 7.7VA
Current Circuit @ Ib0.1VA
Supply FrequencyNominal50Hz
Frequency Variation+/- 5%
TemperatureRangeLimit operating ranges-20°C to 55°C
Storage range-25°C to 70°C
Dimensions (mm)Standard Terminal CoverH 80 x W 125 x D 36
Extended Terminal CoverH 113 x W 126 x D 41
DisplayType – 7 character, 7segment LCD
Character size – 83.5 mm.