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Patented
Autophase technology actually corrects common wiring errors.
Analog and network models available. Click on
the appropriate series to see details below...
...or select data sheets in PDF format from
this list.
|
Series |
Outputs |
Input Voltage |
Current Range |
Data Sheet |
|
| APO |
4-20mA & 0-5 or 0-10 VDC &
pulse outputs |
120,208,240,480 or 600VAC |
5-3000A |
pdf |
Features and
Application |
| APN |
RS232 or Modbus RTU 24 data points |
120,208,240,480 or 600VAC |
5-3000A |
pdf |
Features and
Application |
| APT |
4-20mA, 0-5VDC or 0-10 VDC |
120,208,240 or 480 VAC |
5 A or ProteCT |
pdf |
Features and
Application |
| APMR |
Dual Relay Outputs, plus 4-20mA |
120,208,240 or 480 VAC |
5 A or ProteCT |
pdf |
Features and
Application |
| APS |
4-20mA Loop Powered |
120,208,240, or 480 |
Self-contained CT Input, 180 A max |
pdf |
Features and
Application |

The AutoPhase Advantage
AutoPhase makes power transducer
installation simple.
There are over 40 ways to wire up a 3
phase, 4 wire kW transducer. For example, reversing the
orientation of a CT flips the output waveform, tricking
ordinary watt transducers into thinking there is a 180 degree
phase shift. Or if CT and voltage inputs are mismatched, the
transducer thinks there is a 120 degree phase shift. Either
way, you have a problem.
AutoPhase identifies the phases and
polarity automatically and corrects for the error in software.
This eliminates flashing "ERROR" lights, tedious and
dangerous reconnecting of inputs. AutoPhase even tells you
which CTs are reversed and which phases are mismatched!
AutoPhase is protected by US Patent
5,652,505
APO
Features
- Meter Grade Digital accuracy for
reliable measurement.
- Advanced microprocessor running
at 5 MIPS (faster than many PCs!) provides high-speed
sampling, accuracy and flexibility impossible with
traditional kW/kWH transducers.
- Accepts ProteCT Current
Transformers with 0.333 V safe output... Eliminates need
for costly shorting blocks, or
- Accepts traditional current output (5
Amp) CTs... reuse your existing CTs.
- Available in our standard, module
format, or in a NEMA I hinged cover enclosure. OEM
versions in an open board format can also be supplied.
Specifications
| Power Required |
None... Self-powered |
| Accuracy |
0.5% FS, True RMS Power |
| Voltage Range |
120-600 VAC, Auto Range Select, Up to
12 KV with optional Potential Transformers |
| Amperage Range |
5-5000 Amps with ProteCTs
50-3000 Amps with Current Output CTs |
| Isolation Voltage |
3,700 VAC |
| Built-In Fusing |
600 VAC, 0.5A (No External fuses
required) |
| Connections |
Voltage: 12" Leads, # 18 AWG,
pre-tinned
Current Inputs & All Outputs: Captive screw terminal
accept # 14-22 AWG wire |
| Analog Outputs |
4-20 mA and 0-5 or
0-10 VDC, both available at all times |
| kW |
0-5 VDC or 0-10 VDC (User Selectable)
Self Powered, Opto Isolated, 10 K ohm Minimum Load
impedance |
| kW |
4-20 mA, Self Powered 24VDC , Opto
Isolated, 500W Maximum Burden |
| Discrete Outputs |
Undervoltage, kWH pulse, both
available at all times |
| System Alarm |
Solid State N.O. Contact, 100mA @ 30 V
AC/DC (75, 80. 85 & 95% Undervoltage Setpoints,
phase loss protection) |
| kWH |
Solid State Contact, 100mA @ 30 V
AC/DC, Ranges 0.01, 0.1, 1.0 & 10 kWH per pulse |
| LCD Display |
Two Line, 16 Character |
| Environmental |
-18 to 50 C (0 to 122 F), 0-95% RH, NC |
| Dimensions |
Module: 9"Hx6.5"Wx2.6"D
(23x16.5x6.5CM)
NEMA1:
10"Hx10"Wx4"D(26x24x10CM)
|
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APN
Features
- Direct Connection to network, Modbus
RTU output with no expensive interface.
- Patented AutoPhaseTM Technology
corrects common wiring errors such as CT reversal and
phase mismatch. This can save hours of field labor!
- Meter Grade Digital accuracy.
- Advanced microprocessor running at 5
MIPS (faster than many PCs!) allows measurement up to the
70th harmonic.
- Accepts ProteCT Current
Transformers with 0.333 V safe output... Eliminates need
for costly shorting blocks, or
- Accepts traditional current output (5
Amp) CTs... reuse your existing CTs.
- Available in our standard, module
format, or in a NEMA I hinged cover enclosure. OEM
versions in an open board format can also be supplied.
Specifications
| Power Required |
None... Self powered
from the monitored circuit |
| Accuracy |
0.5% FS, True RMS Power
+/- 0.5 Hz |
| Voltage Range |
120, 208, 240, 480 or-600 VAC, Auto
Range Select, Up to 12 KV with optional Potential
Transformers |
| Amperage Range |
5-5000 A with ProteCTs
(need no shorting block!)
50-3000 A with Current Output (5A) CTs |
| Isolation Voltage |
3,700 VAC |
| Built In Fuse rating |
600 VAC, 0.5A (No External fuses
required) |
| Connections |
Voltage: 12" Leads, # 18 AWG,
pre-tinned
Current Inputs & All Outputs: Captive screw terminal
accept # 14-22 AWG wire |
| Environmental |
-18 to 50 C (0 to 122 F), 0-95% RH, NC |
| Dimensions |
Module: 9"Hx6.5"Wx2.6"D
(23x16.5x6.5CM)
NEMA1: 10"Hx10"Wx4"D(26x24x10CM) |
| Modbus Protocol |
RTU Version,
RS485 Addressable, 9600 Baud |
| Optional |
RS232 Point to Point,
ASCII data string, 9600Baud |
| Approvals |
UL and UL-C Listed |
Network Variables
Modbus RTU Network Variables (All
Values True RMS, 24 Points)
| |
Ph-A
|
Ph-B
|
Ph-C
|
Total |
| Voltage |
• |
• |
• |
| Amperage |
• |
• |
• |
| kW |
• |
• |
• |
• |
| kWH |
• |
• |
• |
• |
| kVA |
• |
• |
• |
| Power Factor |
• |
• |
• |
|
| Frequency |
• |
• |
• |
| CT Value |
|
|
|
• |
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APT
Features
- 4-20 mA output, internally powered,
optional 0-5 or 0-10 VDC, proportional to watts
- Externally powered from 120 VAC or 24VDC
- Meter Grade Digital accuracy.
- True RMS output
- Accepts ProteCT Current
Transformers with 0.333 V safe output... Eliminates need
for costly shorting blocks, or
- Accepts traditional current output (5
Amp) CTs... reuse your existing CTs.
- DIN rail mounting eases installation
Specifications
| Power Required |
120 VAC or 24VDC |
| Accuracy |
0.5% FS, True RMS Power
+/- 0.5 Hz |
| Voltage Range |
120, 240, or 480 VAC, Up to 12
KV with optional Potential Transformers |
| Amperage Range |
5-5000 A with ProteCTs
(need no shorting block!)
50 A and higher with Current Output (5A) CTs |
| Isolation Voltage |
3,700 VAC |
| Connections |
Captive screw terminals accept # 14-22
AWG wire, (6) for three CT inputs, 2 for power supply,
two for output |
| Environmental |
-20 to 50 C (-4 to 122 F), 0-95% RH,
NC |
| Dimensions |
4.93"Hx3.76"Wx3.85"D
(125.17x95.6x97.8mm) |
| Approvals |
UL and UL-C pending |
APMR
Features
- Dual Electromechanical Relay Outputs.
- Analog Output (4-20mA, 0-5 VDC or
0-10VDC)
- Meter Grade Digital accuracy.
- True RMS Output
- Accepts ProteCT Current
Transformers with 0.333 V safe output... Eliminates need
for costly shorting blocks, or
- Accepts traditional current output (5
Amp) CTs... reuse your existing CTs.
- DIN Rail Mounting eases installation
Specifications
| Power Required |
120 VAC or 24 VDC |
| Accuracy |
0.5% FS, True RMS Power
+/- 0.5 Hz |
| Voltage Range |
120, 240, or 480, Up to 12 KV with
optional Potential Transformers |
| Amperage Range |
5-5000 A with ProteCTs
(need no shorting block!)
50A and higher with Current Output (5A) CTs |
| Isolation Voltage |
3,700 VAC |
| Connections |
Captive screw terminals accept # 14-22
AWG wire, (6) for three CT inputs, 2 for power supply,
two for analog output, four for relay outputs |
| Environmental |
-20 to 50 C (-4 to 122 F), 0-95% RH,
NC |
| Dimensions |
4.93"Hx3.76"Wx3.85"D
(125.17x95.6x97.8mm) |
| Approvals |
UL and UL-C pending |
APS
Features

- Compact Design allows for easy
monitoring of power in confined space, like MCC buckets.
- Single phase or three phase (monitoring
two current carrying conductors)
- Accuracy +/-1% Full Scale
- Hall element based current sensing.
- Self-contained current sensing element,
no external CTs required!
- Needs no CT shorting block
- Ranges are factory
set, no jumper to misplace!
Specifications
| Power Required |
None... Output 4-20 mA
Loop Powered |
| Accuracy |
1.0% FS, True RMS Power |
| Voltage Range |
120, 240, or 480 VAC,
+/-25% |
|
Input Range |
Models
from 500 Watts to 100 kW |
| Isolation Voltage |
3,700 VAC |
| Connections |
Finger
safe terminal blocks, 10-24 AWG capacity
Current Transformer Internal: Monitor one conductor for
single phase, or three phase wye
loads (output will be proportional to 1/3 watts)
or two conductors passing in opposite
directions for three phase delta
connected loads. Balanced
loads are assumed.
Click here for wiring diagram |
| Environmental |
-18 to 50 C (0 to 122 F),
0-95% RH, NC |
| Dimensions |
3.88"L x 1.5"W x
2.95 H max. |
|
Aperture |
0.74" |
| Approvals |
UL and UL-C Pending |
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