Features
- Programmable for PT & CT ratio
- True power system design compliants: ANSI-IEEE, IEC & VED standards
- High over capability-assruing reliability
- Effective display range of 5 to 4.5 digits
- High accuracy of 0.5% & o.2%
- Display with super rate LED
Model & Ordering
Specification
- Accuracy (23 + 3oC) :
- 0.5% fs or 20 cts. which ever great: MWFX, MWFY,MWFZ, MWFQ,MKFX,MKFY,MKFQ
- 0.25% fs or 10 count: MWFX2, MWFY2, MWFZ2, MWFQ2, MKFY2, MKFZ4, MKFQ2
- Stability :
- Temperature coefficient < 80 ppm per degree C, long term draft < 0.2% per year
- Digits & counts :
- 4-4.5 digits: maximum counts 5500-1Ø2w, 11000-3Ø3w; 16000-3Ø3w, system
- Display :
- Response time :
- Sample rate 1 pf per sec typically, conversional time less 1 second
- Input over :
- Current input: 3 * rating-continuous, 10 * rating-30sec., 25 * rating-3sec.
- Voltage input: maximum continuous 750V or 1.5 rating which ever great
- Frequency :
- 50 or 60 + 5Hz for Watt version
- 50 or 60 5Hz for Var version ( 50/60 + 0.5 Hz -- less 0.002 change per 0.1 Hz change )
- Creat factor :
- Normally < 3, MWF.. series only
- Waveform :
- 3rd 30% for watt version only
- Dielectric strength :
- 2.5 KV rms / 1 minute, all terminals to reference ground (case)
- 2 KV rms / 1 minute, input terminals to power terminals
- Surge test :
- ANSI C37.90 / 1989, IEC 255-3 (1989)
- impulse voltage :
- Impulse voltage 1.2 * 50 us 4 KV
- Oscillating wave 0.5us-100KHz 3KV or 1MHz-0.25 ms 2.5 KV
- Operating condition :
- Operating temperature range -10 to 55oC, 0-99% RH non-condensed
- Storage condition :
- Storage -25 to 70oC, 20-99% RH non-condensed
- Auxiliary power :
- AC + 15% < 6 VA, DC + 20% < 6 watts
¡@ |