NK TECHNOLOGIES APS Series Manual de usuario

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 10 AWG copper wires, tighten ter-

minals to 4-5 inch-pounds torque.

B. Make sure loop power meets speciﬁcations.

APS Series

AC Power Transducer

True Power of 1φor 3φ Balanced Loads

Model Number KeySpeciﬁcations

Power Supply

Quick “How To” Guide

APS Inst. Rev 5, 1/19 P/N 790180010

3511 Charter Park Drive, San Jose, CA 95136

800-959-4014 or +1-408-871-7510 Phone

+1-408-871-7515 FAX

[email protected], www.nktechnologies.com

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-10.0

Single Phase watt transducer, 480VAC Input, 4-20mAoutput

with 24VDC Loop powered, 10 kW max input.

Voltage

1 120 VAC

2 240 VAC

4 480 VAC

APS 4 - 420 - 24L - 50.0

Full scale kW

0.5

0.75

1.0

2.0

5.0

10.0

20.0

50.0

75.0

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, 10-24 AWG

Torque to 4-5 inch pounds

Voltage Input Up to 10 AWG 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° F, -20 to 60° C

Where: VL= Minimum Loop Power

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

Note: Not all kW ranges are available

for each voltage input range.

APS Series arepower transducers,measuring voltage,current

and power factor concurrently. 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 10-24 AWG copper conductors rated

at 75 deg. C minimum. Tighten terminals to 4-5 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.

4-20 mA Output

To Circuit Voltage

Output signal loop impedance should not exceed

600 ohms when powered by 24 VDC.

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