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Yokogawa AB/DB Switchboard Instruments

Switchboard Instruments

The industry standard for 4 1/4” switchboard instruments. Features include weather tight construction, and interchangeable scales.

AB/DB16-8 3/4” CASE 
This instrument is easily readable from distances over 30 feet. Available in the same ratings as the AB/DB40.

An internally illuminated meter primarily used in high-vibration applications such as railroad and off-road vehicles. Available in Ammeter and Voltmeter configurations.

AB/DB14 Ammeters and Voltmeters are supplied in accordance with military specifications MIL-S-901 and MIL-M-16034. Primary application is for high shock conditions such as shipboard control panels.

Low-cost plastic case Ammeters and Voltmeters that meet ANSI C39.1. These meters offer the same high quality and reliability as the AB/DB40 at a substantial price difference.

Type 2180 switchboard instruments offer 250° scale resolution and 1.5% full scale accuracy. The 3 1/4” face takes up less panel space than conventional switchboard meters.

Type 180 meters are available in horizontal and vertical mounting configurations. Internal illumination is available as an option.

The Dual-Vue series of switchboard meters accepts inputs of AC or DC voltage or current. They provide a convenient combination of an analog scale and digital readout in a rugged switchboard meter case with IP54 rated cover.

Select a link under the "item" tab below to order.

Table 1Table 2Table 3Table 4Table 5
Table 1Type
102P&J AB/DB17
127White back-lit 103
126Red back-lit 103
125D-V Blue LED
124D-V Green LED
120P&J-AB16 Synch.
106P&J-AB40 Synch.
123D-V Red LED
Table 2Measured Qty.
40Power Factor 3W3P & 4W3P (balanced)
41Power Factor 2W1P
46Power Factor-3W3P (unbalanced)
47Power Factor-4W3P (unbalanced)
50Temp. Ind.
55DC Voltmeter (ground detector type)
62DC Tach. Ind.
63AC Tach. Ind.
702WIP Watts • 1 EL
713W3P Watts • 2 EL
734W3P Watts • 2 1⁄2 EL
744W3P Vars • (cross phase) 21⁄2 EL
762W1P Vars • 1 EL
773W3P Vars • (for use w/external phase shifter) 2 EL
794W3P Vars • (for use w/external phase shifter) 21⁄2 EL
813W3P Vars • 2 EL (cross PH)
344W3P Vars (external phase shifter) 21⁄2 EL
01DC Volts
02AC Volts
07Voltmeter (expanded scale)
11DC Amps
12DC Millivolts
13AC Amps
15AC voltmeter (rectifier type)
19Supp. Zero
223W3P Watts 2 EL
254W3P Watts 21⁄2 EL
283W3P Vars (cross phase) 2 EL
294W3P Vars (cross phase) 21⁄2 EL
312W1P Vars 1 EL
323W3P Vars (external phase shifter) 2 EL
37Freq. Meter
212W1P Watts 1 EL
Table 3Mechanical Features
2Zero center, black cover
6Zero center, antiglare, black cover
5Zero left, antiglare, black cover
4Zero center, gray cover
3Zero left, gray cover
1Zero left, black cover
Table 4Elec. Rtg.
Table 5Scale
Accuracy: ±1.0% of full scale basic accuracy class.
Specific accuracies:
Rectifier type meter- ±1.5% @ 25˚C calibrated to sine wave.
Expanded Scale Voltmeter- 0.3% of mid-scale.
Power factor meter- ±1% of scale length from 20-100% of rated current
on balanced system models; ±3% of scale length on unbalanced system model types.
Synchroscope- ±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)
Full scale deflection angle: 250˚, except synchroscope is 360˚
Full scale length: AB/DB40, AB/DB14, AB/DB17- 6.9 inches.
AB/DB16- 13.8 inches.
Scale plate: AB/DB40, AB/DB14 platform type 2 piece scale with graduations on the outer scale; numerals and legends on the inner scale. AB/DB16, has a one piece platform scale, AB/DB17 see page 8.
Case: All AB/DB switchboard instruments have drawn steel case with zinc chromate coating except AB/DB40 plastic case which is ABS.
Cover: AB/DB14, AB/DB17 metal cover with polycarbonate window.
AB/DB16, AB/DB40 polycarbonate-UL94V-0 cover and window.
Terminal plate: phenol resin material.
Mounting studs: 1/4" x 28 thread.
Terminal studs: 10-32 thread.
Operating temperature range: 0 to 40˚C (32 to 104˚F).
Storage temperature range: -10 to 50˚C (14 to 50˚F).
Extreme temperature range: -20˚C to 65˚C (-4 to 149˚F).
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 (except AB/DB16)

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