AC Ammeter YS-8NAA Series
Caution
- This product belongs in RoHS Directive under Category 9 "Monitoring and control equipment" with exclusion from the usage restriction of phthalate esters until 21 July 2021.
Product Description
YS-8NAA series AC ammeter (mechanical indicator.)
[Features]
· Used for measuring current in power transmission/distribution lines, load equipment, etc.
· Size: W82 × H82 mm.
· Operating principle: movable iron core type.
[Applications]
· An instrument for measuring and displaying current from AC and DC circuits.
AC Ammeter Specification
| Rectangular Meter | |
|---|---|
| Y-N Series | |
| Size (Width × Height) mm | 82 × 82 |
| Model Name | YS-8NAA |
| Operating Principle | Movable iron core type |
| Accuracy Class (Grade) | 2.5 |
| Frequency | 50-60 Hz dual use |
| Scale Length (mm) | 70 |
| Consumption VA (VA) | 1.0 |
| Weight (kg) | 0.1 |
Remark 1. Scale intervals for the movable iron core-type meters are non-uniform, and scale lines near the 0 point of the scale are omitted.
Remark 2. Scale lines and number positions may differ slightly between individual meters, even with the same scale specifications.
Expanded Scale Meters
Use in locations where overcurrents flow temporarily, such as motor circuits.
The effective measurement range covers up to the meter rating value (1x value.) The expanded scale portion is displayed to provide reference values.
Ensure that during application of a current exceeding the rating (applied current [A] / rated current [A])2 × the application time (s) does not exceed 500.
Expanded scale example image (YS-206NAA-type)
Expanded Scale Meter Specifications
| Rated Scale Value | Expanded Scale Value | |||
|---|---|---|---|---|
| 2x Expansion | 3x Expansion | 5x Expansion | ||
| Direct | 1 A | 2 A | 3 A | 5 A |
| 3 A | 6 A | 9 A | 15 A | |
| 5 A | 10 A | 15 A | 25 A | |
| 10 A | 20 A | 30 A | 50 A | |
| 15 A | 30 A | 45 A | 75 A | |
| 20 A | 40 A | 60 A | - | |
| 30 A | 60 A | 90 A | - | |
| C T Combination | Meter Rating: 5 A | CT ratio × 10 A | CT ratio × 15 A | CT ratio × 25 A |
| Meter Rating: 1 A | CT ratio × 2 A | CT ratio × 3 A | CT ratio × 5 A | |
The manufacturer uses the 3x expanded scale meter as the standard.
Recommended Ammeter Scale Values For Electric Motor Circuits
200‑V three-phase induction motor
| Motor Output (kW) | Rated Current (Reference Value A) | Recommended Scale | |
|---|---|---|---|
| Ammeter Scale (3x Expansion) | CT Ratio | ||
| 0.2 | 1.8 | 0-3-9 A | - |
| 0.4 | 3.2 | 0-5-15 A | 5/5 A |
| 0.75 | 4.8 | 0-7.5-22.5 A | 7.5/5 A |
| 1.5 | 8 | 0-10-30 A | 10/5 A |
| 2.2 | 11.1 | 0-15-45 A | 15/5 A |
| 3.7 | 17.4 | 0-20-60 A | 20/5 A |
| 5.5 | 26 | 0-30-90 A | 30/5 A |
| 7.5 | 34 | 0-40-120 A | 40/5 A |
| 11 | 48 | 0-60-180 A | 60/5 A |
| 15 | 65 | 0-75-225 A | 75/5 A |
| 18.5 | 79 | 0-100-300 A | 100/5 A |
| 22 | 93 | 0-120-360 A | 120/5 A |
| 30 | 125 | 0-150-450 A | 150/5 A |
| 37 | 160 | 0-200-600 A | 200/5 A |
AC Ammeter Dimensional Outline Drawing
A dimension: 41
Dimensional Outline Drawing
Panel hole drilling dimensions
(view from front of panel)