In the past, meters were tested to UL/CSA 61010-1, as was other Measurement, Control, and Laboratory Equipment. Meter manufacturers are increasingly migrating from UL 61010-1 to UL 2735.
UL 2735 covers:
- Meters rated up to 600V which measure, monitor, record, transmit, or receive electrical energy generation or consumption information
- Socket mounted plug-in (Type S) utility meters, and non-socket mounted, bottom connected (Type A) utility meters
- Meters provided with one or two-way communication capabilities by means of carrier signals, telephone, cable, or wireless communication
- Meters that provide signals, directly or wirelessly, for the control of electrical loads or electrical power generation equipment
These construction and performance requirements are included in UL 2735:
Components
- Compliance with relevant component standards
- Used within their recognized ratings
- Includes plastics, PCBs, MOVs, wire, and transformers
Electrical
- Accessibility of hazardous live parts
- Electrical spacings over-surface and through-air
- Isolation of current transformer secondary
- Endurance of load control switch
- Single component fault
Fire
- Polymeric enclosure flammability
- Battery protection, charging, placement and replacement
- Single component fault
Mechanical
- Enclosure environmental considerations
- Enclosure strength and rigidity
- Access panels
- Static
- Impact
- Drop
ANSI C12.1
- Insulation resistance
- HV line surges
- Fast transient/burst
- RF interference
- RF conducted/radiated emissions
- Temperature rise
- Temporary overload
- Electrostatic discharge
Markings
- Environmental suitability
- Electrical ratings
- Installation instructions
- ANSI C12.10 nameplate
- Permanence and legibility
UL 2735 is not yet part of the NRTL Program, however MET Labs is already accomplished in testing to it. Learn more about MET’s highly-regarded testing of meter safety, reliability, and accuracy for manufacturers or utilities.