Automate Voltage Regulators

Utilities commonly use voltage reduction as a load management strategy. Voltage reduction capabilities within the regulator control permits reduction of the line voltage during situations where power demands surpass the available capacity, and where there are extraordinary peak loads.

Remote control of down-stream regulators prevents them from automatically boosting the voltage, during peaks, to maintain an acceptable range. When the peak period ends, the voltage regulator can be remotely set back to automatic regulation.

Voltage Regulation with the DNP-RTM
The DNP-RTM is a cost effective solution for remote monitoring and control of DNP compliant voltage regulators such as the Siemens MJ-XL or Beckwith 2001B. The DNP-RTM continuously polls up to 99 DNP points through a local serial connection, and when a reportable change is detected the device transmits an event report. If needed, voltage levels are adjusted.

Integrating the DNP-RTM with a voltage regulator is simple. Specific status or analog points can be enabled or disabled using the Telemetric Web Server or a local configuration program. Integration hardware and operating directions are all included in the integration kit.

Voltage Regulation with the T646 MicroRTU
The MicroRTU outputs are well suited for controlling non-DNP compliant voltage regulators. There are two primary modes of regulator operation that match the capabilities of the MicroRTU.

1. Many voltage regulators can be set to provide one of three different voltage reduction levels by applying a 120 VAC control signal to specific input terminals. The three reduction levels are usually independent of each other and are programmable from 0.0 to 10.0 percent. The T646's six outputs can provide the control signal that selects the desired voltage level.
2. Regulators with pulse activated voltage reduction capabilities can be controlled by sending momentary 120 VAC pulses from the MicroRTU to the regulator. The regulator's reduction per step is usually programmable from 0 to 10 percent in steps of 0.1 percent.

The T646 provides six status inputs. They can be either dry contact inputs, or can monitor the presence of 120 VAC. The dry contact inputs can also be configured to be counters or counter/timers.

Four analog inputs can be configured to monitor a variety of conditions including AC voltage, DC voltage, current, or levels, using 0-10 VAC, 0-10 VDC (input 1 only), 0-5 VDC, 0-1 mA, or 4-20 mA sensors.

Six control outputs use electromechanical relays. Outputs one and two are rated at 30 Amps at 125 VAC (if spade terminals are used). Outputs three through six are rated at 8 Amps at 250 VAC. Outputs can be configured as permanent or momentary. The momentary output signals can be user configured in 1 second increments from 1 second to 241 hours. One 12 VDC 100 mA output is for powering sensors (not available on 12 VDC models). An on-board toggle switch is provided to disable remote control during maintenance operations.

The Telemetric products provide reliable and full-feature control of voltage regulators at a minimum cost.