SNAP-AIPM-3 OPTO 22, SNAP-AIPM-3 Datasheet - Page 9

• Manufacturer Part Number: SNAP-AIPM-3
• Description: Power Monitoring Module
• Manufacturer: OPTO 22

Specifications of SNAP-AIPM-3

• Accessory Type: Three-phase Power Monitoring Module
• Signal Input Type: 85 To 250V And 0 To 10A RMS
• No. Of Analog Inputs: 4
• Rohs Compliant: Yes
• For Use With: Snap I/O Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

SNAP Power Monitoring Modules
Scaling Example 5: SNAP-AIPM-3V without PT
The SNAP-AIPM-3V requires CTs with a 0.333 VAC secondary.
(For suitable CTs, see Opto 22 form #1938, the
Current Transformers Data
Leave Actual values at their defaults for all points, and leave
Lower Scaled at 0. Calculate Upper Scaled as follows:
Points 0, 4, 8: Always 300 volts
and 300 VAC. (For line voltage over 250 V, use Example 4.)
Points 1, 5, 9: Primary of the CT
Points 2, 6, 10: Upper Scaled for voltage * Upper Scaled for
current (ex. Upper Scaled for pt 0 * Upper Scaled for pt 1)
Points 3, 7, 11: Upper Scaled for voltage * Upper Scaled for
current
Points 12, 13: 3 * Upper Scaled for voltage * Upper Scaled
for current
Example
Voltage: 240 VAC (no potential transformer required)
Current: 100 amps (using a CT primary of 150)
So to calculate points 2, 6, 10, 3, 7, 11: 300 * 150 = 45,000
...points 12, 13: 3 * 300 * 150 = 135,000
1 IMPORTANT—Voltage change: Older SNAP-AIPM-3V
modules had an input range of 0–250 volts for points 0, 4, & 8.
Before wiring or scaling, check the printed information on the
module to make sure you are using the correct voltage.
Contact Product Support to exchange older modules.
© 2006–2011 Opto 22. All rights reserved. Dimensions and specifications are subject to change. Brand or product names used herein are trademarks or registered trademarks of their respective companies or organizations.
Unit
Lower
Upper
Unit
Lower
Upper
Unit
Lower
Upper
VAC/VDC VAC/VDC
True Power & ABS
Actual
Actual
Actual
300
Points 12 & 13
Points 2, 6, 10
0
0
1
0
1
Points 0, 4, 8
Voltage
SALES 800-321-6786 • 951-695-3000 • FAX [phone] • [e-mail] • SUPPORT 800-835-6786 • 951-695-3080 • FAX [phone] • [e-mail]
Watts
135,000
Scaled
Scaled
45,000
Scaled
300
Sheet.)
W
0
0
0
J
1
for line voltage between 85
Actual
Actual
0.333
Points 3, 7, 11
Points 1, 5, 9
V
0
0
1
Volt Amps
Current
Split-Core
Scaled
Scaled
45,000
150
VA
A
0
0
Scaling Example 6: SNAP-AIPM-3V with PT
For line voltage higher than 300 VAC
potential transformer (PT) must be used.
The SNAP-AIPM-3V requires CTs with a 0.333 VAC secondary.
Leave Actual values at their defaults for all points, and leave
Lower Scaled at 0. Calculate Upper Scaled as follows:
Points 0, 4, 8: 300 * PT ratio
Points 1, 5, 9: Primary of the CT
Points 2, 6, 10: Upper Scaled for voltage * Upper Scaled for
current (ex. Upper Scaled for pt 0 * Upper Scaled for pt 1)
Points 3, 7, 11: Upper Scaled for voltage * Upper Scaled for
current
Points 12, 13: 3 * Upper Scaled for voltage * Upper Scaled
for current
Example
Voltage: 480 VAC (requires potential transformer).
PT ratio is 2:1
Current: 350 amps (requires CT primary of 400)
So to calculate points 0, 4, 8: 300 * 2 = 600
...points 2, 6, 10, 3, 7, 11: 600 * 400 = 240,000
...points 12, 13: 3 * 600 * 400 = 720,000
Unit
Lower
Upper
Unit
Lower
Upper
Unit
Lower
Upper
Opto 22 • 43044 Business Park Drive • Temecula, CA 92590-3614 • www.opto22.com
VAC/VDC VAC/VDC
True Power & ABS
Actual
Actual
Actual
300
Points 12 & 13
Points 2, 6, 10
0
0
1
0
1
Points 0, 4, 8
Voltage
Watts
240,000
720,000
Scaled
Scaled
Scaled
600
W
0
0
J
0
Actual
Actual
0.333
Points 3, 7, 11
Points 1, 5, 9
1
V
0
0
1
, a step-down
Volt Amps
Current
240,000
Scaled
Scaled
400
VA
A
0
0
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