Beckwith Electric M-2948 Tap Position Sensor

• M-2948 Tap Position Sensor directly mechanically replaces the Selsyn-Type Tap

Position Sensor.

• Directly interfaces with a 4 to 20 mA output to the M-2025D Current Loop Interface

which provides the tap position to the M-2001 Series Tapchanger Control.

• Rotation – 0 to 210°, 297°, 306°, 315°, 325°, 330°, 340° and 350° configurations

• Degrees per Tap – 9° or 10°

• Neutrals – 1, 2, 3, 5 or 6

• Rotation Direction – Tap Position Sensors are available with either a positive

or negative rotation. With positive rotation, the shaft of the M-2948 rotates

clockwise while raising taps. With negative rotation, the shaft of the

M-2948 rotates counter-clockwise while raising taps.

M-2948 Digital Tapchanger Control – Specification

Input

• +12 Vdc Power input supplied from the M-2025D

• M-2025D Transient protected to ANSI/IEEE C37.90.1-1989

Output

• 4 to 20 mA relative to tap position

• 2 digital outputs for mechanical calibration

Connections and Calibration

The M-2948 Tap Position Sensor is designed to operate exclusively with the

M-2025D Current Loop Interface.

For connections and calibration refer to the M-2025D Specification.

Options

Mounting Bracket - Part No. 441-41191

Tests and Standards

The M-2948 Tap Position Sensor complies with the following Electro Magnetic

Compatibility (EMC) standards:

EN55022 (2001) Class B: Emissions Radiated 30-230 MHz: 30 Db/µV; 

230-1000 MHz: 37 Db/µV

EN55024 (2003) Including:

EN61000-4-2: ESD: 8 kV Air; 4 kV Contact

EN61000-4-3: Radiated Immunity: 27 Mhz–1 Ghz, 10 V/m

EN61000-4-4: Fast Transient/Burst: 1 kV Supply, 0.5 kV Signal

EN61000-4-5: Surge Immunity: 1 kV Signal

EN61000-4-6: Conducted Immunity: 150 kHz–80 MHz 10 V emk or 16 V RMS

EN61000-4-8: Magnetic Field Immunity: 30 A/M @ 50 Hz