Analog panel meter, model 250 - 3 1/2" & 4 1/2" square.

Specifications:

• Accuracy: ±2% Iron-Vane 50/60 Hz. When standard 60 Hz ammeters are used on the extreme limits of 25 or 400 Hz, an additional 0.75% error may be experienced.
• ANSI specification: All Meters meet ANSI C39.1.
• Overload: Momentary - 10 x rated current, 10 consecutive intervals of 1/2 second with a 1 minute interval between successive applications; sustained, 120% for 6 hours.
• Scale length: 3 1/2"...2.88", 4 1/2"...3.93"
• Scale arc: 90o
• Insulation level: 2600VRMS, 1 min.
• Burden data: 0.5VA, 0.5PF lag
• Response time: 2.5 sec. max.