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3-In-1 AC Volt or Amp 2493 Series
Brand: Weschler Instruments2493 Power Series Plus Digital Switchboard Meters: Model 2493 includes AC Amperes, AC Voltage, and Frequency measuring capabilities, as well as flexible options for Input Rating, Frequency, Analog output and Communication options.
The POWER SERIES PLUS combines a high accuracy digital switchboard meter with up to three transducer outputs which can be configured in the field by an end-user or OEM.
The rugged metal case fits standard panel cutouts for switchboard meters and makes the PSP a perfect replacement for analog instruments.
The RS-485 communications option allows up to 32 meters to be networked together for remote monitoring and control. In addition, the POWER SERIES PLUS can be set up and locked out for security via the remote communications option.
The 2943 Triple Display Multifunction Power Meter
Ideally designed for easy retrofit into existing switchboard meter panel cutouts.
The 2493 features three easy to read LED displays, minimum/maximum values at the touch of a button, scaling up to 1250:1 for potential transformers and 5000:1 for current transformers.
Optional 0-1mA DC and 4-20mA DC analog out puts are configurable by the user. The 2493 is also available with a wide choice of power supply options.
Formally manufactured by Yokogawa
Features- Scaling of the instrument for PT (potential transformer) primary ratings up to 9999; and CT (current transformer) primary ratings up to 9999
- Adjustable transducer output proportionate to the primary input setting
- Display average setting: Adjustable to obtain a “rolling average” of inputs. Increasing the number of samples reduces annoying “digit bounce” by the least significant digit
- All settings are stored in non-volatile memory. If there is a loss of power to the instrument, all settings will remain as they were prior to power loss
- Accuracy of ±0.2% of reading, ± 0.1% of full scale
- True RMS current and voltage measuring capability. A most desirable feature when distorted wave forms are present on the line
- High resolution/ high intensity LED displays that can be viewed from almost any angle
Specifications
Brand
Display
- Type: 4-Digit red LED (9999 counts) for 2493 readouts (3 displays), 4-1/2-Digit red LED for 2491, 2492
- Digit Height: 0.56 inch or 14 mm
- Response Time: 250 ms min. update time for V/V/V, A/A/A, 2491 and 2492, Less than 500 ms min. update time for V/A/Hz, Watt/VAR/PF 2493
Auxiliary Power
- 120 V or 240 Vac (± 15 %), 45-65 Hz, 4.5 VA max or select 24, 48, 125 Vdc
Input Rating
- Current: 0 to 1 A AC, 0 to 5 A AC
- Voltage: 0-120 Vac, 0-240 Vac, 0-480 Vac (W/VAR/PF/PA), 0-150 Vac, 0-300 Vac, 0-600 Vac (Volt/Freq), 0-150 Vdc, 0-300 Vdc, 0-600 Vdc
- Frequency: 50/60 Hz and 400 Hz (only V/A/Hz units)
Input Range
- Rated Current: A/W/VAR: 0-200 %, PF/PA: 20-200 %
- Rated Voltage: V/W/VAR: 0-120 %, PF/PA: 50-120 %, Frequency: 20-120 %
Input Frequency
- Volts, Amps, Hertz
- 45-65 Hz up to the 9th harmonic measuring capability
- ± 2 % of specified accuracy
Sustained Input
- Rated Current: A/W/VAR/PF/PA: 200 % continuous, 10x rating for 5 seconds
- Rated Voltage: V/W/VAR/FREQ: 120 % continuous, PF/PA: 150 % continuous
Burden
- Current: < 0.2 VA per element
- Voltage: < 0.2 VA per element, 240 V: < 0.4 VA per element
Analog Output and Response Time
- 10 Vdc compliance into 10k ohm load Max., 15 Vdc compliance into 750 ohm Max.
- 1 second Max. response time within ± 1 % of final value
- 16-bit resolution, accuracy 0.4 % of Span
- 0 to 1 mA, 4-20 mA, 12 ± 8 mA
Output Ripple
- 0.5 % peak-to-peak Max. of output span
Communications
- RS-485 half duplex interface with networking up to 32 units
- Selectable Baud Rate
Isolation Voltage and Insulation Resistance
- Input to Output/Case: 2500 Vac for 1 minute / more than 10 Megohm @ 500 Vdc
- Auxiliary Power to Case: 2000 Vac for 1 minute / more than 10 Megohm @ 500 Vdc, DC: 500 Vdc minimum / 10 Megohm minimum @ 100 Vdc
- Output to Case: 1000 Vac for 1 minute . more than 10 Megohm @ 500 Vdc
- Auxiliary to Output: AC: 2000 Vac for 1 minute / more than 10 Megohm @ 500 Vdc, DC: 500 Vdc minimum / 10 Megohm minimum @ 100 Vdc
Temperature Range
- Operating: -20° to +60° C at 90 % Relative Humidity Max. (Non-Condensing)
- Storage: -40° to +85° C
Temperature Coefficient
- Analog Output: ± 250 ppm/°C Max. of Full Scale
- Display and Comm: ± 150 ppm/°C Max. of Full Scale
Influence Of
- Magnetic field: 0.5 % Max. at 400 ampere turns/meter
- Input voltage: < 0.05 Power Factor (10-120 % of rated voltage)
- Influence Of: Shock/Vibration: per ANSI C39.1
- Unbalanced current: < 0.2 % of Full Scale
- Input frequency: < 0.05 Power Factor (45-65 Hz)
- Load resistance (Analog Output): 0 to 1 mA: 0-10K ohm within ± 0.05 % of Full Scale, 4-20 mA, 12 ± 8 mA: 0-750 ohm within ± 0.05 % of Full Scale
Dimensions
- 4.33 x 6.54 x 4.33 inches
Weight
- 1000 g (2.2 lbs) or less