Beckwith Electric M‑2293 Tap Changer Control
The Beckwith Electric M‑2293 is a microprocessor‑based tap changer control designed for automatic voltage regulation of power transformers and distribution voltage regulators. It monitors the transformer secondary voltage and issues raise/lower commands to the tap changer mechanism to maintain the output voltage within a programmed band. This control is suitable for both step‑voltage and induction regulators.
The M‑2293 features programmable setpoints, time delays, and line‑drop compensation, allowing precise voltage control even under varying load conditions. It also includes voltage limit alarms, tap position monitoring, and communication capabilities for remote supervision.
Key Features
Voltage regulation accuracy: ±0.5%
Adjustable bandwidth: 0.5–10% of nominal
Line‑drop compensation: 0–10% (adjustable)
Time delay: 1–120 seconds (programmable)
Tap position display and limit alarms
RS‑232/RS‑485 communication (Modbus RTU)
Front‑panel keypad and LCD display
Technical Specifications
Input voltage: 120/240 VAC, 50/60 Hz; power consumption: < 20 VA; PT input: 120 VAC; output relays: 2 x SPDT (raise/lower), 5 A rating; operating temperature: -20°C to +70°C; enclosure: IP40; dimensions: 150 x 100 x 60 mm.
Applications
Used in substation transformers, distribution feeders, and industrial power systems. The M‑2293 ensures stable voltage supply to loads, reducing losses and improving power quality.
Installation and Configuration
Mount the control in a panel near the tap changer. Connect PT sensing leads and wiring to the motor drive. Configure setpoints via the front‑panel keypad or PC software. Communication parameters are user‑selectable.
Reliability and Maintenance
The M‑2293 includes self‑diagnostic routines and surge protection. Periodic verification of voltage calibration and tap changer operation is recommended.
Why Choose the M‑2293?
This control offers a cost‑effective solution for automatic voltage regulation, backed by Beckwith Electric’s reliability. Its flexible settings and communication options make it suitable for modern distribution networks.
In summary, the Beckwith Electric M‑2293 provides dependable voltage regulation for transformers, enhancing system efficiency and stability.
