Transformer Load  Monitor

Description
An all electronic, microprocessor controlled, digital watthour/demand meter for
monitoring the load performance of transformers located on utility poles and in sub-surface vaults.

Technical Specifications

Accuracy
ANSI C12.16 Electronic Meter Standards, +/- 0.5% full scale

Power Input
Types:          2-wire or 3-wire single phase
                    3-phase, 4-wire WYE
                    3-phase, 3-wire DELTA
Voltages:      120V, 240V, 120/240V
                    120/208V, 277/480V
Frequency:   60Hz
(other configurations available, please inquire)

Operating Ranges
Voltage:           +/- 20% of rated voltage
Current:           5A secondary
Frequency:      57Hz to 63Hz
Temperature:  -40 C to +85 C
Humidity:        0 to 95% non-condensing

Non-Volatile Memory
32k ROM, 512 bytes EEPROM, 32k RAM
Data is stored and secured in the event of a power failure for a minimum of 3 years

Liquid Crystal Display
Preprogrammed at factory to display automatically and sequentially every 5 seconds:
Meter Number, Location Code Date, Time, voltage per phase, kWh, kW (15 or 30 minute integration interval), ambient temperature, transformer temperature, wind speed.
Additional programmable display: serial #, current per phase, instantaneous kW per phase, water level.

30 Day Daily History
Factory programmed to record and store 30 day daily kW and kWh history in   non-volatile memory

60 Day Hourly History
Factory programmed to record and store hourly kWh, kW, voltage and current per phase, 2 temperatures, wind speed, for the past 60 days

Event Log Reporting
Factory programmed to record the following events with date/time and maintain the 20 latest occurrences of each in non-volatile memory:

                  Voltage exceeds or drops below parameters
                  Change in voltage exceeds a parameter
                  Instantaneous kW exceeds a parameter
                  Temperature exceeds or drops below parameters
                  Wind speed exceeds a parameter
                  Water level exceeds a parameter

All parameters are user definable and configurable.

Time-Of-Day Recording
Up to 3 time periods (user programmable)

Digital Input
3 inputs 0-5V, plus/negative logic acceptable, opto-isolated

Analog Input
2 input 0-5V, 10k-ohm input impedance

Relay Controlled Output
SPST switch, 1A/125VAC

TELCO Communications
1200 baud modem built-in, FCC Part 68 registered DAA, Bell 212A/103 and CCITT V.22 standards, ‘AT’ command set compatible, automatic answer, speed, parity

Installation
Mounting:                              S-Base, A-Base (numerous configurations)
Potential Wire Type/Sizes:     14 to 18 gauge, solid or stranded
Data Cable:                           22 gauge, 4 conductor
Current Transformer Wire:     14 to 20 gauge

Enclosure
12” x 10” x 5” surface mount, steel, lockable, hinged, NEMA/EEMAC Type 12 and Type 13 (Type 3 and Type 4 also available), UL 50 Type 12 and Type 13, JIC standard EGP-I-1967, CSA Type 12, IEC 529, IP65

Other Outstanding Features
Field Programmable, kW reset button, kW/kWh reset button, RS-232 communications, RS-422 communications, RF and Cellular Phone communications expandable, password protected, spike and surge protected, fuse protected circuitry, real time clock.

Note: Specifications are subject to change without notice due to circumstances and availability of materials beyond our control. However, basic specifications regarding operation and accuracy will be maintained at all times.

For pricing and availability, please call or e-mail us.

Copyright May 2004  Computerized Meter Manufacturing Corp.  All rights reserved.