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Linear Constant Current AC Power Supply

The PTK Series Linear AC Constant Current Power Supply is an easy-to-use precision low-voltage, stable high-current AC source for calibration intended for laboratory, production and electrical test applications. It uses linear amplification technology to produce a low-distortion sine wave with accurate programmable voltage, current and frequency control.

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Linear ac power supply

Linear AC Power Supply Highlights

  • Stable AC Calibration source for current sensors and shunts
  • Current transformer calibration
  • AC current 1A…120 A, 40–400 Hz
  • Total accuracy 0.25% all ranges
  • Accuracy Enhancement using Pearson Reference
  • Use as Integral part of power calibration system
  • Optional test coil up to 3000Arms
  • GPIB emulation of other transconductance amplifiers
  • Over Voltage, current and VA protection features

Linear AC Power Supply Performance Features

  • User interface with magnitudes ramp times and load protection
  • Linear amplifier constant current architecture
  • Pure sine wave output
  • 0–10 V adjustable output
  • 2–120 A adjustable constant current
  • 40–400 Hz programmable frequency
  • Excellent load regulation
  • High measurement accuracy with Enhancement options
  • GPIB and RS485, RS-232 as standard
  • RS485 (Modbus) communications Labview API
  • Floating output up to 450 Vpk, compliance voltage 10Vrms
  • Frequency sync when used with voltage calibrator
  • Comprehensive protection functions

Linear AC Power Supply Applications

  • Rogowski Coil Current Sensors
  • Current Transformer and magnetic component testing
  • Current injection and relay testing
  • Energy meters
  • Circuit breaker verification
  • Cable and busbar testing
  • Research and development laboratories
  • Production and end-of-line testing
  • General AC current source applications

AC Power Supply datasheet

Specifications

DC/AC voltage sine output

Voltage Range: 0 to 1040V
Frequency range: 15Hz to 300kHz
range % of value + µV % of value + µV % of value + µV % of value + µV % of value + µV
DC 15Hz - 10kHz 10kHz - 30kHz 30kHz - 100kHz 100kHz - 300kHz
0mV - 20mV 0.022 + 3 0.2 + 30 0.2 + 40 1 + 100 5 + 900
20mV - 200mV 0.0045 + 8 0.1 + 80 0.15 + 120 0.3 + 300 0.5 + 1m
200mV - 2V 0.0035 + 10 0.025 + 120 0.05 + 300 0.2 + 1m 0.5 + 1m
2V - 20V 0.0035 + 40 0.025 + 700 0.05 + 1.5m 0.2 + 10m --
20V - 100V 0.0042 + 250 0.027 + 5m 0.05 + 15m -- --
100V - 280V 0.0042 + 500 0.03 + 12m 0.05 + 50m -- --
280V - 1050V 0.005 + 7m 0.042 + 85m -- -- --

DC/AC current sine output

Current range: 0 to 20.5A
Frequency range: DC, 15Hz to 10kHz
range % of value + µA % of value + µA % of value + µA % of value + µA
DC 15Hz - 1kHz 1kHz - 5kHz 5kHz - 10kHz
0µA - 200µA 0.05 + 20n 0.15 + 150n 0.30 + 200n 0.5 + 500n
200µA - 2mA 0.028 + 100n 0.085 + 300n 0.20 + 1 0.50 + 1.4
2mA - 20mA 0.015 + 600n 0.05 + 2 0.2 + 10 0.5 + 14
20mA - 200mA 0.015 + 6 0.05 + 20 0.2 + 100 0.5 + 140
200mA - 2A 0.02 + 130 0.07 + 200 0.2 + 500 --
2A - 20.5A 0.025 + 2m 0.1 + 6m -- --
*I is set current in A. Additional accuracy with Opt.140-50 Current coil is 0.3%. Multiplying coefficient is 25 or 50.
**Maximal period for continuous current 20.5A is 30s. Maximal period for continuous current 20A is 60s.

Function Shape (non-harmonic signals)

Voltage range:
1mV to 200V
Current range:
100uA to 2A
Wave form:
square positive, negative, symmetrical, saw A, B, triangle limited sin
Peak value accuracy:
0.3% + 50uV
Displayed values:
peak, calculated rms
Frequency range:
to 1000Hz for voltage, to 120Hz for current
The lowest frequency for square waveforms is 0.1Hz, for other waveforms 20Hz.

Resistance and Capacitance

Resistance range:
0 to 1000 MΩ
Capacitance range:
800pF to 100µF

Function Frequency

Total frequency range:
0.1Hz to 400MHz
Accuracy of frequency:
0.005 %
Frequency function modes:
PWM, fmax = 400MHz, square waveform with calibrated ratio and amplitude
HF, fmax = 20MHz, square waveform with calibrated frequency and amplitude
Voltage Range % of value + µV
1mV - 20mV 0.2 +50
20mV - 200mV 0.1 + 50
200mV - 2V 0.1
2V - 10V 0.1

HF mode (0.1 Hz to 20 MHz):

Output impedance:
50Ω
Output waveform:
square symmetrical
Amplitude:
4V pk-pk
Range of amplitude setting:
0, -10, -20 dB, -30dB +/- 1dB
Amplitude accuracy:
10%
Rise time:
< 5ns

RTD temperature sensor simulation

Type °C °C °C °C °C °C °C
-200 - -190 -190 - -100 -100 - 0 0 - 250 250 - 460 460 - 630 630 - 800
Pt3850 Ro:100Ω 0.05 0.06 0.07 0.09 0.12 0.14 0.18
Pt3851 Ro:100Ω 0.05 0.06 0.08 0.10 0.12 0.15 0.18
Pt3926 Ro:100Ω 0.06 0.06 0.08 0.10 0.12 0.15 --
Pt3916 Ro:100Ω 0.06 0.06 0.08 0.10 0.12 0.15 --
Pt385 Ro:200Ω 0.04 0.05 0.08 0.09 0.12 0.14 --
Pt385 Ro:500Ω 0.04 0.04 0.05 0.08 0.12 0.15 --
Pt385 Ro:1000Ω 0.03 0.04 0.05 0.09 0.11 0.14 --
Type -80 - 0 0 - 100 100 - 260
Ni 120 0.05 0.08 0.14

TC Temperature Sensor Simulation

R range [°C] -50 – 100 100 - 400 400 - 1000 1000 - 1767
accuracy [°C] 0.96 0.55 0.44 0.39
S range [°C] -50 - 100 100 - 250 250 - 1400 1400 - 1767
accuracy [°C] 0.9 0.56 0.49 0.40
B range [°C] 400 - 800 800 - 1000 1000 - 1500 1500 - 1820
accuracy [°C] 0.9 0.54 0.48 0.41
J range [°C] -210 - -100 -100 - 150 150 - 700 700 - 1200
accuracy [°C] 0.3 0.25 0.21 0.18
T range [°C] -200 - -100 -100 - 0 0 - 100 100 - 400
accuracy [°C] 0.3 0.26 0.21 0.18
E range [°C] -250 - -100 -100 - 280 280 - 600 600 - 1000
accuracy [°C] 0.45 0.23 0.19 0.19
K range [°C] -200 - -100 -100 - 480 480 - 1000 1000 - 1372
accuracy [°C] 0.35 0.25 0.23 0.24
N range [°C] -200 - -100 -100 - 0 0 - 580 580 - 1300
accuracy [°C] 0.45 0.30 0.26 0.23
M range [°C] -50 - 50 50 - 100 100 - 470 470 - 1410
accuracy [°C] 0.25 0.22 0.21 0.20
C range [°C] 0 - 100 100 - 280 280 - 1370 1370 - 2315
accuracy [°C] 0.37 0.34 0.34 0.47
D range [°C] 0 - 100 100 - 280 280 - 1830 1830 - 2315
accuracy [°C] 0.45 0.37 0.34 0.47
G2 range [°C] 100 - 200 200 - 430 430 - 2080 2080 - 2315
accuracy [°C] 0.72 0.49 0.35 0.39

Built-in Process Multimeter

Function Range Accuracy (%) Resolution/Range
DC voltage 12mV 0.005 + 3µV 0.01µV
120mV 0.005 + 5µV 0.1µV
1.2V 0.005 + 50µV 1µV
12V 0.005 + 500µV 10µV
DC current 100µA 0.02 + 20nA 1nA
1mA 0.02 + 100nA 10nA
2.4mA 0.015 + 800nA 100nA
24mA 0.015 + 800nA 100nA
Resistance 2kΩ 0.02 + 10mΩ 1mΩ
20kΩ 0.02 + 50mΩ 10mΩ
Frequency 1Hz - 100kHz 0.005 10µHz - 0.1Hz
TC Temperature -250 - 2315°C 0.2 - 1°C TC Depends
RTD Temperature -200 - 800°C 0.08 - 0.42°C Pt Depends

General data

Warm up time:
60 min
Working temperature range:
23 ± 10°C
Stocking temperature range:
0 to 40°C at RH bellow 80 %
Reference temperature:
23 ± 2°C
Dimensions:
450 x 480 x 150 mm
Weight:
23kg
Power line:
115/230 V

Accessories

Power line cable
1 pc
Operation manual, CD
1 pc
Option 10/11 Test wire banana-banana 1000V-20A
2 pcs
Option 40, 60, 70, 80 Cable adapters
1 pc each
Spare fuse
1 pc
RS232 cable
1 pc

Options (extra ordered)

0950 Current coil Current coil 10x/25x/50x <1500A Calibration of clamp ammeters
Adapter 9000-60 for resistance and RTD measurement adapter 9000 60
Adapter 91 Pt100 cold junction compensator adapter 91
Cable 10 Test cable 32A/1000V (black) 1m length
Cable 11 Test cable 32A/1000V (red) 0.75m length
Cable 15 Test cable 12A/600V (black) 0.75m length
Cable 16 Test cable 12A/600V (red) 1m length
Cable 20 Test cable BNC – BNC, 50Ω 1m length
Cable 30 Test cable BNC – banana, 50Ω 1m length
Cable GPIB GPIB cable 2m length
Cable RS232 male to female cable 2m length
Option 90 External Pt temperature sensor Pt 1000 probe
GPIB to USB GPIB to USB Converter
RS232 to USB RS232 to USB Converter
WinQbase Database application software
CALIBER Application SW for automated and semi automated calibrations.
Powertek specializes in the design and manufacture of electrical power, voltage and current measuring instrumentation
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