NK TECHNOLOGIES APS Series User manual

INSTRUCTIONS
1. Route wire to be monitored through aperture. For
480VAC and/or 3 phase installations, ensure wires
are routed through the aperture in a two-pass con-
figuration as shown on reverse side.
2. Mount the sensor to a surface if needed.
3. Connect voltage and output wiring to appropriate
terminals. Ensure voltage is derived from same
line that runs through the aperture. Use field sup-
plied fuse or circuit breaker per standard wiring
practice.
A. Use up to 14 AWG copper wires, tighten ter-
minals to 9.0 inch-pounds torque.
B. Make sure loop power meets specifications.
APS Series
AC Power Transducer
True Power of 1φor 3φ Balanced Loads
Model Number Key
Specifications
Power Supply
Quick “How To” Guide
APS Inst. Rev 4, 10/11 P/N 790180010
Know Your Power
Other NK Technologies Products Include:
AC & DC Current Switches
Ground Fault Sensors
Voltage & Power Transducers
Current Transformers (CTs)
Example: APS4-420-24L-9.0
Single Phase watt transducer, 480VAC Input, 4-20mAoutput
with 24VDC Loop powered, 9.0kW max input. Input may be
wired with two opposite current wire passes.
Voltage
1 120 VAC
2 240 VAC
4 480 VAC
APS
Full scale kW
0.5
0.75
1
5
10
20
50
75
100
Output 4-20mA
Output Limit 22mA
Accuracy 1% FS
Response Time 100 mS (to 90% of step change)
Frequency Range 10-400 Hz
Power Supply 24VDC Nominal Loop Powered 36 VDC
Maximum
Power Inputs Expressed as:
Amps 2-120A
kW 0.5 kW to 100 kW
HP 1/4HP@120 VAC to 150 HP@480 VAC
Voltage Input 120, 240 or 480 VAC Nominal
Voltage Variation +/- 25% of nominal
Amperage Over-range 150% FS indefinitely
300% FS 10 Seconds
600% FS 5 Seconds
Output Terminals Finger-safe captive screw, 14-22 AWG
Torque to 9.0 inch pounds
Voltage Input Up to 14AWG wire, 600V max.
Fusing External fusing of voltage input
recommended
Indication Power LED
Input Conditions Across the line motors and VFDs
Environmental -4 to 140 Deg F, -20 to 60 Deg C
Where: VL= Minimum Loop Power
R
L= Total Loop Resistance
(Ohms)
VL= 12VDC + (RLx .020A)
Total Loop Impedance (Ohms)
0 250 500 750 1000
32 V
22 V
12 V
Operating
Range
LOOP
POWER
(VDC)
Power Supply
24L 24VDC Loop-
Powered
Output
420 4-20 mA
4 2 0 2 4 L
Note: Not all kW ranges are available
for each voltage input.
Buy: www.ValinOnline.com | Phone [phone] | Email: [email protected]

APS Series are single phase power transducers. They
provide an analog signal proportional to the true power
consumed by the monitored load. They can be applied on
single phase loads and on balanced three phase loads.
Description
Wiring
Wiring Details and Output Calibration (con’t)
Current Sensing:
Determine the type of electrical load you are monitoring.
The diagrams at right show some typical examples. The
APS can be used to monitor total power on a balanced
3-phase load, or it can be used in a typical single-phase
application. Use 14-22 AWG copper conductors rated
at 75 deg. C minimum. Tighten terminals to 9.0 in-lb
torque.
Voltage Connection:
Determine the voltage of the system you are monitoring
and make sure the transducer is rated to match. Connect
the leads to the appropriate terminal block on the unit as
shown in the diagrams at right. Add fuses if required by
local code (fuses not included). Use code approved splice
materials and techniques.
Output Connection:
The APS transducer is a loop powered unit. Ensure a
24VDC power supply is in series with the sensor and load
as shown. Be sure the supply has sufficient voltage and
current available. See Power Supply section.
Environment:
The APS transducer is intended for use in a Pollution
Degree 2 environment.
43
4-20 mA Output
21
+-
To Circuit Voltage
Output signal loop impedance should not exceed
600 ohms when powered by 24 VDC.
Buy: www.ValinOnline.com | Phone [phone] | Email: [email protected]