Datasheet

NHR 9430 Regenerative
4-Quadrant AC Loadni.com

Table of Contents
03

NHR 9430 Regenerative 4-Quadrant AC LoadApplications
Best forKey Features
Physical and Safety

04

Applications

04

4-Quadrant Operation

04

HIVAR® Design Provides Reactive Loading without Derating True Power

04

Several Emulation Modes

05

User-Defined Waveforms

05

Macros05

Regenerative Return of Load Power to Facility Line

06

Built-In Digital Measurement

06

Physical Connections and Controls07

NHR 9430 Regenerative 4-Quadrant AC Load Specifications

ni.comNHR 9430 Regenerative
4-Quadrant AC LoadApplications

ELECTRICVEHICLESSWITCH/FUSE

SOLAR
INVERTERGRIDUTILITYUPS

VEHICLETO GRID

BEST FOR:

Testing Full Line Disturbances at Any Power Factor
Grid Utility Test, Inverter Test, UPS Test
EV Load TestingSwitch, Fuse Test
Linear and Non-linear Loading, Inductive and Capacitive
Loading Requirements.



Sink power regenerated back to facility with >90% efficiency

KEY FEATURES:






6 Sizes – 12 to 96kW
Single, Split or Three-Phase programmable
10 to 350VAC
30 to 880Hz
DC operation to 10 to 400VDC
Reactive power capability 2.6 x Real PowerPower factor range: -1 to +1
Crest factor range: 1.414 to 4.000
High-resolution waveform digitizer
9” Touch-Panel user interface
High power density/minimum rack space

PHYSICAL AND SAFETY:
MODEL

9430-129430-249430-36

9430-48

9430-72

9430-96

PhysicalConnectors

Terminal blocks

Terminal blocks and bus bars

FormChassis

Single Cabinet

Dimensions (HxWxD)

15¾ x 19 x 24”/400 x 483 x 610mm

49 x 23 x 30”/1245 x 584 x 762mm

61 x 23 x 30”/
1549 x 584 x 762mm

78 x 23 x 30”/
1981 x 584 x 762mm

78 x 46 x 30”/
1981 x 1168 x 762mm

Weight155lbs/70kg

480lbs/218kg

640lbs/290kg

780lbs/353kg

1280lbs/581kg

Operating Temperature

0° - 35°C, Non-Condensing

Double Cabinet

1560lbs/708kg

SafetyUUT Prog. Limits

V Min/Max, I Max, W Min/Max, each with timedelay values

Isolation

Facility to Chassis - 1kV, Facility to Output 2kV, Output to Chassis - 1kVl

PhysicalUser Interlock, Emergency Stop and remote e-Stopconnection

Watchdog

A continuous communication verification program
controlled by a test executive

Internal Protection

Over-Voltage, Over-Current, Over-Power, Over-Temp.

Self TestAn automatic hardware check upon power-up

EMC

CE Markni.com

NHR 9430 REGENERATIVE 4-QUADRANT AC LOAD03

Applications
The 9430 is a current-regulated, 4-quadrant AC load with selectable phase inputs/outputs and a built-in waveform digitizing measurement
system. In the sink mode, it sends power back to the facility mains rather than dissipated as heat. The 9430 has the capability of simulating
almost any linear or non-linear load. Applications include testing of UPSs, AC sources, inverters, rectifiers, switches, circuit breakers
and fuses.

4-Quadrant Operation
The most unique feature of the Model 9430 AC Load is its ability to operate in all 4-quadrants. This bi-directional capability significantly
expands load simulation relative to 2-quadrant AC loads. More specifically, the 9430 allows creating the reverse current caused by inductive
or capacitive loads (low power factors); namely sending power back to the UUT (source) during part of the AC cycle (Fig. 1). In this manner the9430 accurately duplicates real-world reactive electrical power flows.

VOLTAGECURRENT

Quad 1

Quad 4

Quad 2VA)

wer (nt Po

reAppaReactivePower (VAR)

Quad 2

Φ

Quad 3

True Power (Watts)

ΦPower Factor = Cosine

60°

180°

240°

360°

420°

FIGURE 1

FIGURE 2

0. 5 PF Inductive Load waveform showing bi-directional power flows.

The Power Triangle.

HIVAR® Design Provides Reactive Loading without Derating
True PowerThis advanced design feature provides for testing high reactive load input power without the customary reduction of true power (Watts)
normally required with conventional loads. The HiVAR design provides testing sources with reactive power (VARs) as large as 2.6 x truepower (Watts.) All 9430 Loads are rated both for true power and apparent power. For instance, a 12kW Load is also rated for 31.5kVA.

Several Emulation Modes
To provide testing under the broadest range of loading conditions, the 9430 Load will operate in several Emulation Modes. Constant Current(CC) Mode provides current to be drawn constantly, making it suitable for linear, non-linear and regulation loading. Constant Resistance (CR)Mode allows the load to emulate a power resistor with a unity power factor. Constant Power (CP) Mode emulates a load such as a switching
power supply. Constant Apparent Power (CS) Mode expressed as VA, is a vector quantity where there is both real power and reactive power(Fig. 2). Constant RL (CRL) Mode emulates a resistive load with an inductive component such as a motor.

ni.comNHR 9430 REGENERATIVE 4-QUADRANT AC LOAD

04

User-Defined Waveforms
In addition to programmable power and crest factors, one of the tools used by the 9430 AC Load for creating non-linear waveforms is agraphics editor. This editor allows starting with a straight line or modifying a generated waveform based on current, power and crest factor.
The graphical editor includes an auto-check feature to ensure the settings are compatible with each other and within the capabilities of the9430. It also supports waveform smoothing, symmetrical and asymmetrical waveform manipulation. With this graphics editor, waveforms
can be quickly created to duplicate waveform distortions or transient events such as spikes, dropouts or any other anomaly that can bedrawn as a single cycle (Fig. 3).

FIGURE 3

FIGURE 4

User-Defined Asymmetrical CurrentStart-Up Inrush Current Macro

Macros
A second powerful user-defined waveform tool are Macros. These are a pre-programmed sequence of settings where each new setting iseffective for a sub-cycle, any number of cycles or for a fixed amount of time. This sequence is entered using a menu-driven, programmingfree interface. The sequence is then downloaded to the AC Load where it is executed at high speeds to provide precise control of any phase.
Macros can be stored for use on other test programs (Fig. 4).

Regenerative Return of Load Power to Facility LineThe 9430 Load returns greater than 90% of power to the facility thereby providing significant electrical savings. It certain continuous
loading testing, it has been shown that the load will recover its purchase cost in 2 - 3 years. Even for intermittent load usage, the savings fromregenerative return to the facility is substantial and worth evaluating. Additional benefits are a more comfortable work environment, less air
conditioning required and an elimination of facility power upgrades.

ni.comNHR 9430 REGENERATIVE 4-QUADRANT AC LOAD05

Built-In Digital Measurement
Model 9430 Loads include a digital measurement system that features a high-resolution waveform digitizer. This provides the power analysis
tools typically found in test systems that include digital multi-meters, oscilloscopes, and power analyzers. Having such a comprehensive
measurement system built into the 9430 eliminates the integration complexity, prolonged start-up time, extra cabinet space and cost for
those additional measurement instruments often required. The user is ready to begin testing the day the 9430 is delivered.
The types of measurements are broad and include almost any type of voltage, current, power and timing. In a 3-phase 9430, all six channels
of voltage and current measurements are digitized simultaneously at 125kSamples/sec to be displayed, recorded or further processed toyield a custom measurement. Specialized measurements such as abnormal grid detection thresholds, disconnection timing, power ramp-up
timing, and generated harmonic current limits are possible.
Waveform Capture
Data Channels

6 ch (3 phases of voltage & current)

Memory64k samples for each of 6 chBandwidth

DC to 50kHz

Accuracy/Resolution

0.5% Range/0.005% Range

Sample Rateto 125 kSample/sec

Aperture

1 cycle to 64 sec

Aperture Measurements

13 total including AC/DC Voltage, Current, True Power

Background Measurements

35 total including AC/DC Voltage, Current, True Pwr, Apparent Pwr, Freq., Pwr Factor, Crest Factor,
Energy, Phase Angle, Pk V, Pk I, Pk Pwr

Custom Current Waveforms
Sine, n-step Sine, Triangle,
Clipped Sine, Notched Sine,
Arbitrary (User Def.)

User DefinedGraphical wave shape editor or
downloaded Excel table

User Interface

Built-In Touch Panel and/or
external PC w/ Windows softwaretools including GUIDrivers

Ni-Compliant LabVIEW Drivers,Enerchron (opt.)

External System Communication

LAN (Ethernet) supporting SCPI
or VXI-IIStandardControl

Physical Connections and Controls
12456371211810951) Options Switch

92 Status Lights and Trigger61) LAN (Ethernet) Port

10 Safety Interlock

3 Circuit Breakers

71) Parallel Connections

11 Input AC Power Terminal

4 Output Power Connectors and External Sense

81) Remote Emergency Off

12 Chassis Ground

1Touch Panel Based Control and Display

ni.comAuxiliary Configuration

NHR 9430 REGENERATIVE 4-QUADRANT AC LOAD06

NHR 9430 Regenerative 4-Quadrant AC Load Specifications
MODEL NUMBER

9430-129430-249430-36

9430-48

9430-72

9430-96

AC Output Programmability
Phases/Output Channels

Single, Split or 3-Phase

Input Voltage (LR,HR)

10 - 175, 350VRMS L-N (30Hz - 880Hz)

Current Limit Set Ranges¹ (per Φ)

6, 30A (3Φ)

12, 60A (3Φ)

18, 90A (3Φ)

24, 120A (3Φ)

36, 180A (3Φ)

48, 240A (3Φ)

Current Limit Set Max¹ (per Source)

18, 90A (1Φ)

36, 180A (1Φ)

54, 270A (1Φ)

72, 360A (1Φ)

108, 540A (1Φ)

144, 720A (1Φ)

Power Limit Set Max² (1, Split, 3Φ)12, 8, 12kW

24, 16, 24kW

36, 24, 36kW

48, 36, 48kW

72, 48, 72kW

96, 64, 96kW

Maximum Apparent Power²31.5kVA

63kVA

94.5kVA

126kVA

189kVA

252kVA

Normal Mode (CC/CP/CS)

Resistance Mode (CR/CC/CP)RL Mode (Series CR & CL)

Crest Factor

1.414 - 4.0 (up to 3x
MAX ARMS)

Constant
Resistance-4Ω to -1000Ω/1.5Ω to 1000Ω

Constant
Series-RL

1.5Ω to 1000Ω/0H to 1H

Power Factor-1.0 - +1.0

Resolution

10mΩ

Resolution

10mΩ/1μH

Slew Rate

10%-90% Range in < 500μs

Result. Current¹

Vin/Rset

Result. Current

Vin/√R2 + (2πfL)2

DC Loading Programmability
Input Voltage

10 - 200, 400VDC

DC Loading Modes

Constant Voltage (CV), Constant Current (CC), Constant Power (CP), Constant Resistance (CR), in any combination

Current Limit Set Ranges¹

0 - 18, 90A

0 - 36, 180A

0 - 54, 270A

0 - 72, 360A

0 - 108, 540A

0 - 144, 720A

Power Limit Set Max²

0 - 12kW

0 - 24kW

0 - 36kW

0 - 48kW

0 - 72kW

0-96kW

Measurements (Accuracies apply when the settings and/or measurements are greater than 10% of Range and input voltage is above 50VRMS.)
Range

Accuracy

Resolution

Voltage Range (LR, HR)

260, 520V Pk

AC RMS

260, 520V Pk±(0.1% Rdg + 0.06% Rng) @<100Hz, ±(0.2% Rdg + 0.12% Rng) @>100Hz

0.005% Rng

DC260, 520V Pk±(0.1% Rdg + 0.1% Rng)

0.005% Rng

Peak Voltage

260, 520V Pk±(0.5% Rdg + 0.2% Rng) @<100Hz, ±(1.0% Rdg + 0.4% Rng) @>100Hz

0.005% Rng

Frequency

30-1000Hz

0.1% (Sinusoidal Voltage)

0.01HzCurrent per Phase (LR, HR)

20, 100A Pk

40, 200A Pk

AC Current

Model Dependent±(0.1% Rdg + 0.1% Rng) @<100Hz, ±(0.2% Rdg + 0.2% Rng) @>100Hz

0.005% Rng

DC Current

Model Dependent±(0.2% Rdg + 0.1% Rng)

0.005% Rng

Peak Current

Model Dependent±(0.5% Rdg + 0.2% Rng) @<100Hz, ±(1.0% Rdg + 0.4% Rng) @>100Hz

0.005% Rng

Power (kW, kVA)

V Rng x C Rng±(0.2% Rdg + 0.1% Rng) @<100Hz, ±(0.2% Rdg + 0.2% Rng) @>100Hz

0.005% Rng

Energy (AH, kWH, kVAH)

Time dependent

0.3% Reading + 0.3% Rng

0.005% Rng

Power Factor-1.0 to +1.0±(0.25% Rdg + 0.25% Rng)

0.005% Rng±(0.6% Rdg + 0.6% Reading Pk)

0.005% Rng+-2 deg @ < 100Hz, 6 deg @ < 400Hz, 15 deg @ < 880Hz

1 deg

Crest Factor
Phase Angle (ΦX-ΦA)

0 to 360º60, 300A Pk

80, 400A Pk

120, 600A Pk

160, 800A Pk

Input Power

Voltage/Frequency

Universal Input - 380 to 480VAC ±10%
(L-L, 3-Phase, 50/60Hz) / 49 - 51Hzor 59.3 - 60.5Hz

Power Factor

Unity PF > 99% measured at fullpower when loading 480VRMS (L-L)/ 60HzEfficiency

92% @ 480V Facility Input
measured at full power whenloading 480VRMS (L-L) / 60HzCooling

Air Cooled 35°C Max Ambient,
reduced power from 35 to 50°C

Current/phase @ 380, 400, 480V

22, 20, 17A

66, 60, 51A

44, 40, 34A

88, 80, 68A

132, 120, 102A

176, 160, 136A

Programming Accuracies for Current are ±(0.2% Set+0.2% Range) @ < 100Hz & ±(0.4% Set+0.4% Range) @ > 100Hz. 2 Programming Accuracies for Power are ±(0.4%Set+0.4% Range) @ < 100Hz and ±(0.8% Set+0.8% Range) @ > 100Hz. 3 Programming Accuracies for RL Mode are +-(1% * ILoad +300mA) @ < 100Hz & +-(1% * ILoad+600mA) @ > 100Hz.
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