| Display |
| Scaling: |
Customized to any scaling desired, from linear to specialized Cos Ø, square root distributions, with color applications for visual emphasis and to any desired engineering unit. |
| Specific Accuracies |
| Basic Accuracy: |
±1.0% of full scale basic accuracy class. |
| Rectifier Type Meters: |
±1.5% @ 25°C calibrated to sine wave. |
| Expanded Scale Voltmeters: |
0.3% of mid-scale |
| Power Factor Meters: |
±1% of scale length from 20-100% of rated current
on balanced system models; ±3% of scale length on unbalanced system model types. |
| Synchroscopes: |
±1% of scale length. |
| Frequency Meters: |
± .15Hz @45-55Hz and 55-65Hz, ±0.093Hz @
58-62Hz, ±1.5Hz @350-450Hz |
| |
| Position of use: |
Vertical (scale) standard
or to specified angle or position |
| Full scale deflection angle: |
250°, except synchroscope is 360° |
| Full scale length: |
6.9 inches. |
| Scale plate: |
platform type 2 piece scale with
graduations on the outer scale; numerals and legends on the inner
scale.
Single scale for illuminated versions |
| Movement: |
Proven, shock resistant Taut Band |
| Case: |
All AB/DB switchboard instruments have drawn steel case with
zinc chromate coating except AB/DB40 plastic case version which is ABS plastic. |
| Cover: |
Gasketted cover to prevent contaminant ingress, polycarbonate-UL94V-0 cover and window. |
| Terminal plate: |
phenol resin material. |
| Mounting studs: |
1/4” x 28 thread. |
| Terminal studs: |
10-32 thread. |
| Dielectric level: |
2300VAC for 1 minute between the electrical circuit and mounting
studs. |
| Overload rating: |
Voltmeter and potential coils-1.2 x rating (continuous).
AC Ammeters- 2 x rating (continuous), and 10 x rating for one second.
Current coils (other than ammeters) 1.5 x rating (continuous), and 10 x
rating for one second. |
| Response time: |
Approximately 2.5 seconds |
| General: |
| Operating Temp.: |
0 to 40°C (32 to 104°F) |
| Storage Temp: |
-10 to 50°C (14 to 50°F) |
| Extreme temperature range: |
-20°C to 65°C (-4 to 149°F)
Tropicalized or IP54 sealed units available |
| Relative Humidity: |
95% (non condensing) |
| Case Dimensions: |
| Meter Face: |
4.33" X 4.33" |
| Case Depth: |
AB Series = 4.10"
DB Series = 3.20"
Watt/Var/ Sych = 5.22"
+1.57" for stud length |
| Case Diameter: |
3.97" |
| Cut out Diameter |
4.030" |
| Studs |
1.688" from mid-line (Hor. & Vert.)
3.375" between studs (Hor. & Vert.) |
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