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T96 C1NKP Three Phase Electronic Watt-Hour Meter

Energy & Metering

T96 C1NKP Three Phase Electronic Watt-Hour Meter

Class 2 three-phase CT-connected electronic meter with optical IEC 62053-21 port, four-tariff register, 12 Mb load profile, and per-phase voltage / current readout.

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Overview

T96 C1NKP is our three-phase CT-connected electronic billing meter for industrial sub-metering and grid-tie applications. Built on our own metering controller platform with a 32.768 kHz quartz RTC, lithium-backed retention, multi-line LCD, 12 Mb internal load-profile memory, and an optical IEC 62053-21 port for walk-by reads at 300-9600 bit/s. Manufactured end-to-end on our SMT line: paste print on the 120 µm stencil, vision-checked placement of the metering IC and optical front-end, SAC305 reflow, and AOI on every joint. Per-unit calibration constants are written to NVRAM and stamped against the production database before the unit ships.

Key features

  • Four-tariff register with programmable calendar
  • 15-month historical per-tariff register on the first day of each month
  • Per-phase voltage, current, and energy logging into 12 Mb internal memory
  • Optical IEC 62053-21 port works without DLMS adapter
  • Save / read / memory-full / memory-error commands (E/D/W/R/M/G)

Standards

  • IEC 62053-21

How it is used

Industrial sub-meters, grid-tie billing, and large-service distribution. CT-connected 5(6) A secondary lets the meter scale to any primary current through the customer-supplied CTs. Optical port supports walk-by reads by any IEC 62056-21 Mode C reader; 12 Mb load profile lets billing engineers reconstruct usage long after the event.

How we build it

Single-sided SMT board produced on our DDM Novastar line. SPR-45 prints SAC305 paste through a 120 µm stencil with extra deposit on the three CT input pads and the bridge rectifier. LS60 vision-checks the metering IC pitch, RTC crystal alignment, optical-port IR LED orientation, and electrolytic polarity. GF 120HC reflows at 245 °C peak for 8 min. AOI inspects every joint after reflow. Per-unit calibration constants are written to NVRAM and stamped against the production database before sealing.

Assembled on our in-house Novastar SMT line: SPR-45, LS60, GF-120HT.

Optical inspection and test

AOI inspects every board: metering IC pitch, RTC crystal alignment, LCD ZIF connector seating, IR LED orientation, and CT input pad geometry. Functional test at a partner test house: three-phase reference source injects 5 A balanced and unbalanced loads at varying cos φ, pulses verified against the 8000 imp/kWh constant within Class 2 tolerance per IEC 62053-21, optical port exercised at 300-9600 bit/s, and load-profile save/read commands validated.

Design specifications

Mechanical

Wall-mount enclosure with sealed terminal block, multi-line LCD, optical port window, inner fitting diameter 4.5 mm, weight 1.88 kg.

Electrical

3 × 220/380 V at 50 Hz, In 5 A, Imax 6 A, initiating current 0.5 mA, meter constant 8000 imp/kWh, power consumption 1.9 VA, Class 2 and 1 per IEC 62053-21.

Environmental

Working temperature -20 to +70 °C, indoor or sheltered outdoor cabinet. Voltage dependence ±0.5 % at ±10 % Un, frequency dependence ±0.5 % at ±5 % fn.

Communication

Optical IEC 62053-21 port, 300-9600 bit/s. Commands: consumed energy per tariff, 15-month historical register, per-phase voltages and currents with ±0.02 V / ±0.02 A accuracy, time/date set and read, tariff calendar set, serial number set/read, identification readout, fault display. 12 Mb internal memory with E/D/W/R/M/G command set. Log interval 1-60 minutes for Ir/Is/It and Ur/Us/Ut.

Specifications

Class
2 and 1 (IEC 62053-21)
Nominal voltage
3 × 220/380 V
Power frequency
50 Hz
Nominal current In
5 A
Maximal current
6 A
Initiating current
0.5 mA
Meter constant
8000 imp/kWh
Working temperature
-20 to +70 °C
Power consumption
1.9 VA
Per-phase voltage read accuracy
±0.02 V
Per-phase current read accuracy
±0.02 A
Internal memory
12 Mb load profile
Log interval
1 to 60 minutes (47 days at 1 min, 94 days at 2 min)
Optical port
IEC 62053-21 Mode C, 300-9600 bit/s
Weight
1.88 kg

Services used to build this

Relevant industries

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