Current Transformers for Watt-Hour Meters

Watt-Hours meters are devices that measure the amount of electricity used by a residence or business location.

Falco designs and develops Current Transformers (CTs) for Watt-Hour meters that meet the precision and mechanical requirements of the application. CTs are engineered to comply with the relevant ANSI and IEC standards, encompassing all requirements for accuracy and external influences.

Different CT configurations are offered including potted, pin, or lead out terminations, as well as with the embedded primary conductor. A magnetic shield can be incorporated to mitigate the core saturation caused by unwanted external magnetic fields such as tampering attempts.

State-of-the-art calibration panels for electricity meters enable us to test linearity across various power factors and temperature ranges from -40°C to +85°C, along with DC tolerance assessments. This capability allows us to optimize our current transformers in terms of size, performance, and cost.

Falco CTs are utilized in various single and three-phase electricity metering systems that require accuracy. They are applicable in residential and industrial environments.

PRODUCTS

AC Current Transformers

  • Current range up to 400A
  • Customized current ratio from 1:100 up to 1:4000 or more upon request
  • Class 0.2 accuracy per ANSI C12.1, ANSI C12.20 and IEC 62053-22
  • Customized rectangular and Toroidal shapes to meet any footprint application
  • Shielded options against external magnetic fields are available
  • Assistance for UL-listing, UL-recognized components, or CE-marked option

DC Tolerant Current Transformers

  • Current ranges up to 200A
  • Full and partial DC tolerance per IEC 62053-21
  • Class 0.5 accuracy per IEC 62053-21
  • Customized rectangular and Toroidal shapes to meet any footprint application
  • Shielded options against external magnetic fields are available
  • Assistance for UL-listing, UL-recognized components, or CE-marked option

SINGLE PHASE AC CT

AS0W01

Features
  • Single-phase application Nominal current: 200A
  • Current ratio: 1 to 3000
  • High accuracy: 0.2 Class per ANSI C12.1
  • Shielded enclosure against external magnetic fields for antitampering

THREE PHASE AC CT

AS0W02

Features
  • Three-phase application
  • Nominal current: 320A
  • Current ratio: 1 to 2000
  • High accuracy: 0.2 Class per ANSI C12.1
  • Epoxy sealed

Relays for Watt-Hours Meters

Watt-Hours meters use relays to remotely disconnect energy.

Relays are extensively utilized in ANSI and IEC compliant electronic watt-hour meters. This product supports smart meters featuring remote disconnection capabilities, enabled by the incorporation of latching relays and revenue-grade CTs within assemblies. Falco manufactures relays in Mexico and CTs in all facilities.

PRODUCTS

RELAY ASSEMBLY

RA0W01

Features
  • According to ANSI or IEC
  • Socket (type “S”) or Bottom-connected (type “A”)
  • Meets UL2735 for safety
  • CTs can be incorporated

Base Assemblies for Watt-Hour Meters

Watt-Hours meters are assembled on a plastic base that includes Current Transformer, Current coil, Wire Harness, and Relay.

Includes the plastic base, current terminals, current transformers, wire harnesses, and the relay.

Falco controls the entire manufacturing process, which includes injection molding, metal stamping, tin plating, terminal crimping, welding, and CTs. Final testing is automated using image recognition software. Units are serialized with a 2D label or laser-engraved, and the associated test data is stored for traceability and analysis.

The bases for our electricity meters are extensively utilized in ANSI and IEC-compliant electronic watt-hour meters and support smart meters featuring remote disconnection capabilities. Falco manufactures meter bases at its facilities in China and Mexico, facilitating efficient shipping to markets across Asia, Europe, and the Americas.

PRODUCTS

METER BASE ASSEMBLY

MSAW01

Features
  • According to ANSI or IEC for physical aspects
  • Socket (type “S”) or Bottom-connected (type “A”)
  • Made to meet UL2735 for safety
  • Single and Polyphase bases
  • Fully automatic system for inspection
  • Current transformer, wire harnesses, plastic and metal parts produced by Falco
  • Latching relay assembly
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