User's Manual

10 Universal Metering Transponder for kV2c™ Meter User Guide
Daylight Saving Time
The UMT-C-KV does not support the bi-annual Daylight Saving Time (DST)
change as a scheduled routine. However, when the Master Station transmits a time
sync command after the DST change has occurred, the RCE recognizes an offset
exceeding the threshold limits (offset of one hour ± 15 seconds versus the 15
second threshold). The RCE master clock time is updated automatically. Whenever
the RCE master clock time is corrected to implement daylight saving time, one
hour of data is lost on the 23 and 25 hour days, and the corresponding hour bins are
marked as invalid.
Instructions for updating your TNS system for the Daylight Saving time
adjustment are in the TNS Operational Process Guide.
Universal Metering Transponder (UMT-C-KV)
The Universal Metering Transponder (UMT-C-KV) is a remote power-line
communication transponder contained within and interfaced to a kV2c meter. The
UMT-C-KV integrates a single or polyphase meter with TWACS. The
UMT-C-KV can be integrated with kV2c meters of various forms and classes. See
Table 2.8 on page 30.
AC power enters the kV2c meter from the Utility supply. The UMT-C-KV
receives operating DC power from the kV2c meter and communicates with the
meter through a multiconductor ribbon cable. Communication between the
UMT-C-KV and the utility company is provided by TWACS across the Utility
power lines.
Figure 2.1 UMT-C-KV module assembly