MT358 0.5S C&I 3P CT or CT-VT Meter
Introduction
The MT358 meter offers outstanding high accuracy measurement and complex tariff capabilities for use in both commercial & industrial CT or CT-VT operated applications. The MT358 meter can operate as a standalone unit or as part of a comprehensive metering system.
Features
- Wide range: 3x57.7/100V~3x240/415V, 1(10)A
- Up to 8 comprehensive tariff structure
- Instantaneous instrumentation values
- Local communications via optical port or RS485
- GPRS/3G/LTE/NB-IoT remote communications
- Big capacity data storage
- Internal clock and calendar with battery back-up
- Concealed utility/reset push button
- High security design
- Anti-tamper
Remote Comm.
Billing
Data Security
DLMS
Firmware Upgrade
Load Control
Load Profile
IP54
Specifications
| Item | Sub-item | Value |
|---|---|---|
| Measurement | Active accuracy(kWh) | Class0.5S (IEC 62053-22) |
| Measurement | Reactive accuracy(kvarh) | Class 2 (IEC 62053-23) |
| Measurement | Measuring and registration | Import/Export Wh, varh, VAh; Configuration varh for lagging and leading; Four quadrant reactive varh |
| Voltage | Rated voltage(Un) | 3x57.7/100V~3x240/415V |
| Voltage | Working voltage range | 3x57.7V/100V: 0.9Un - 1.2Un; 3x100V: 0.8Un - 1.2Un; 3x230/400V: 0.8Un - 1.2Un |
| Current | Basic current(Ib)/ Max. current(Imax) | 1(6)A, 5(6)A, 1(10)A, 5(10)A |
| Current | Starting current | 0.001 Ib |
| Frequency | Rated frequency(fn) | 50Hz or 60Hz |
| Power Consumption | Voltage circuit | 2W/10 VA |
| Power Consumption | Current circuit | 0.5 VA |
| Environmental Influences | Operating temperature range | -40°C ~+70°C |
| Environmental Influences | Storage temperature | -40°C ~+80°C |
| Environmental Influences | Impermeability to IEC 60529 | IP54 indoor |
| Electromagnetic Compatibility | IEC 61000-4-2 Electrostatic discharges | Contact discharge: 8 kV; Air discharge: 15 kV |
| Electromagnetic Compatibility | IEC 61000-4-3 Electromagnetic RF-fields | 10Vm and 30Vm |
| Electromagnetic Compatibility | IEC/CISPR 22 Radio interference suppression | class B |
| Electromagnetic Compatibility | IEC 61000-4-4 Fast transient burst test | 4kV |
| Electromagnetic Compatibility | IEC 61000-4-5 Surge immunity test | 6kV |
| Insulation Strength | Insulation strength | 4 kV 50Hz during 1 min. |
| Insulation Strength | IEC 62052-11 Impulse voltage 1.2/50 μs | 8kV |
| Inputs and Outputs | Optical test output | LED (red): kWh impulses |
| Inputs and Outputs | Meter constant | 10000 imp/kWh, 10000 imp/kvarh |
| Display | Type | LCD liquid crystal display |
| Display | Backlit | With backlit(Option) |
| Display | Digit size | Up to 12mm |
| Display | Number of digits | Up to 8 |
| TOU | Time of use | Up to 8 tariff, 8 time span, 8 typical days, 12 typical weeks, 12 seasons, 200 programmable national holiday and special holidays |
| Time Clock & Calendar | Accuracy | 15 Seconds per Month at 23˚C |
| Time Clock & Calendar | Backup Time | 10 Years without Power (Lithium Battery) |
| Time Clock & Calendar | Daylight Saving Time | Option |
| Time Clock & Calendar | Battery | 1 Internal battery for RTC; 1 replaceable external battery for power outage display |
| Communication Interface | Optical Interface | Optical port IEC 62056-21; Protocol: IEC62056-21 E mode |
| Communication Interface | Serial Interface | RS485(option); Protocol: DLMS HDLC |
| Communication Interface | Remote Interface | RJ45 with modem power supply (Interchangeable LTE/3G/GPRS modules); Protocol: DLMS TCP/IP |
| Auxiliary Terminals | Pulse output | Active/Reactive impulse output |
| Auxiliary Terminals | Time synchronization | Time synchronization output/input |
| Auxiliary Terminals | Tariff switch control | Tariff switch control output/input |
| Load Profile | Channels | Up to 32 channels |
| Load Profile | Integration period | 1 to 60 Minutes |
| Load Profile | Storage | 180 Days (24 Channels, 15-Minute Intervals) |
| Load Profile | Capture object | Demand(kW, kvar) , Energy(kWh, kvarh), Instantaneous value(V, A, W, PF, Phase angle) |
| Billing & Max Demand | Storage | 12 sets of Energy/MD billing data |
| Billing & Max Demand | MD mode | Block mode or Slide mode |
| Billing & Max Demand | MD value | Time and value of maximum demand, Value of cumulative Max Demand |
| Antifraud protection | Events & Tamper detection | Sag/Swell;Meter cover open detection;Terminal cover open detection;Magnetic field influence detection;Battery/clock/memory failure detection;Advanced tamper detection and logging;Pre-programmed alarms for meter self-check |
| Air-upgrade | Air-upgrade | Local/remote firmware upgrade |
| Terminal cover | Standard | 60 mm free space |
| Weight and dimensions | Dimensions | 260mm(H) x 170mm(W) x 100mm(D) |
| Weight and dimensions | Weight | approx. 1.5 kg |