## 8500 Series: 4 kW to 20 kW (up to 100 kVA), up to 400A continuous, single-phase and three-phase

# The 8500 Advantage

Unlike traditional switch-mode amplifiers with a ripple frequency between 80 kHz and 100 kHz, the 8500 series has an effective switch frequency of 1 MHz.

This ultra-high-frequency switching gives the 8500 amplifier many benefits over both linear (dissipative) amplifiers and traditional switch-mode amplifiers.

**Bandwidth: **The first and most obvious benefit from a higher switching frequency is wider bandwidth. AE Techron 8000 series amplifiers are the only high-power switch-mode amplifiers with a bandwidth that extends to 250 kHz.

**Smaller output filter:** Switch-mode amplifiers, as a part of their basic design, have high-frequency, high-voltage switching at the heart of their operation. The last stage in any switch-mode amplifier is the low-pass filter that removes the high-frequency switching-noise artifacts from the output signal. Increasing the effective switching frequency by a factor of 10 allows us to reduce the size of these large L-C components used to create this low-pass filter by a similar amount, reducing amplifier size and cost.

**Lower magnitude, higher frequency ripple noises:** The reduction in output filter component size also makes it easier to implement more complex, higher-order low-pass filters, to greatly reduce output ripple noise. The 8500 series uses this advantage to create output voltages of up to 400 Vp with 1 MHz ripple noises that are less than 2 Vp, with in-band noise specifications similar to low-noise linear amplifiers. If even lower noise floors are needed, simple, small, external filtering can reduce this noise even further.

#### Wide-Bandwidth,

High-Power Switch-Mode Amplifiers

**AE Techron’s 8500 Series** amplifiers are 400Vp, low-noise, DC-to-50 kHz switch-mode amplifiers. The 8500 series provides a unique combination of the advantages of switch-mode and linear amplifiers. Switch-mode efficiency is combined with a low noise floor and THD, while also benefitting from high slew rates and wide bandwidth. The 8500 series is also able to safely drive both reactive and resistive loads of varying impedances with no loss in rated output power.

#### Key Performance Capabilities:

**Bandwidth:**DC to 50 kHz**Voltage:**0 to 250 V_{RMS}; 0 to 350 VDC**Slew rate:**Up to 80 V/µs**Current:**Up to 80 to 480 A_{RMS}***Distortion:**<0.2%**Power:**4 kW to 24 kW*- Power levels up to 5X rated power when driving reactive loads
- High power efficiency and density

*Models available with output power from 4 kW to 24 kW (capable of up to 120 kVA).

**Optimized for transient waveforms and reactive loads:** The 8500 Series of amplifiers are compact and capable. They are able to drive purely resistive loads, at rated power, continuously, but really excel when it comes to reproducing short-duration waveforms and/or driving reactive loads.

For periods of up to one minute, the 8500 series amplifier can exceed continuous power ratings by as much as 2.5X. When the load to be driven is reactive, and most of the energy sent into the load is returned to the amplifier, the 8500 can reuse this returned energy to produce apparent power levels that are as much as 5X that of the amplifier’s continuous power ratings.

**Scalable:** The 8500 Series is scalable, available in power levels from a 4 kW, 3U, single-phase, bench top model to mini rack systems that can deliver up to 120 kVA of power into reactive loads at currents of up to 480 A_{RMS}.

**Configurable**

A key to everyday product usability is quick and easy product (re)configuration. The 8500 Series provides all key configuration controls on the back panel of the unit. Configuration options available include:

**GAIN:**Fixed or variable gain (0 to 40)**CURRENT LIMIT:**From 5% to rated limit (to protect fragile DUTs or where specified in the Standard)**DC CONTROL:**DC enabled or DC blocked and DC Servo (for driving transformer-coupled loads or coils)**INPUT:**Balanced and/or unbalanced**MODE:**Voltage source or current source**OUTPUT IMPEDANCE:**Variable from 0 to 1 ohm (Voltage mode)**SENSE:**Correction to voltage drops to the load

**Flexible and Powerful****The 8500 Series **of amplifiers are very signal- and application-versatile, able to reproduce AC, DC and AC+DC wave forms at rated power into loads from a dead short to high impedance without re-configuring or selecting different operational modes.

8500 series amplifiers pack a lot of power into a small package. They are able to produce surge power ratings at up to 2.5X continuous and process apparent power at levels up to 5X the continuous power ratings. This makes an 8500 series amplifier an ideal choice for many difficult-to-drive reactive loads.

This combination of abilities, flexibility, and ease-of-use makes 8500 series amplifiers a singular solution for many common and some previously unsolvable amplifier applications. 8500 series amplifiers can be used for EMC conducted immunity testing, MIL-PRF capacitor tests, DC automotive dropout testing and as a variable AC source for ISO 61000, Aviation and Power Quality Measurements.

## Output

CONTINUOUS AC OUTPUT CURRENT | CONTINUOUS DC OUTPUT CURRENT* | ||||||||||||

VOLTS RMS | 8504 | 8508 | 8512 | 8516 | 8520 | 8524 | VOLTS DC | 8504 | 8508 | 8512 | 8516 | 8520 | 8524 |

60 | 60 | 120 | 180 | 240 | 300 | 360 | 13.5 | 80 | 160 | 240 | 320 | 400 | 480 |

120 | 32 | 64 | 96 | 128 | 160 | 192 | 24 | 80 | 160 | 240 | 320 | 400 | 480 |

230 | 10 | 20 | 30 | 40 | 50 | 60 | 48 | 75 | 150 | 225 | 300 | 375 | 425 |

Note: 8504 power ratings shown are for unit configured for 240VAC. At output voltages above 90VAC, units configured for 120VAC mains input may be breaker limited. Contact AE Techron for 120VAC performance ratings. Performance data is for a purely resistive load; performance will be improved into loads that are partially or completely reactive.

## Performance

## Common Data (all models)

**Operating Modes:** AC, DC and AC + DC**Frequency, AC Mode Output (-3 dB): **DC – 50 kHz**Max Voltage Ranges (no load), AC:** 0 – 260 V

_{RMS}

**AC + DC:**0 – ±400 V

_{P}

**Load Regulation (full scale):**<0.025%, DC to 100 Hz; <0.05%, 10 Hz to 10 kHz

**Line Regulation (full scale):**<0.1% for 10% line change

**External Sense:**Voltage-drop compensation sense line

**Harmonic Distortion (80 kHz, low-passed):**Less than 0.3% from 10 Hz to 30 kHz; 0.5% up to 50 kHz

**Harmonic Distortion (30 kHz, low-passed): **Less than 0.1% from 10 Hz to 50 kHz**DC Offset: **<10 mV**Distortion:** <0.2%**Voltage Slew Rate: **Load dependent; up to 80V per µs, typically 10 µs to 30 µs for 10% to 90% of full-scale change depending on load and power**Efficiency:** 85%, typical**Power Factor: **.72, typical**Source Impedance:** 3 mΩ + 3 µH**Cooling:** Internal forced-air fans**Protection:** Over/under voltage, over current, over temperature

**Input, Signal In, Unbalanced:** BNC connector

**Balanced:**Terminal strip

**Output:**3/8-inch high-current post connectors

**Operating Environment,**

Temperature:5 °C to 50 °C (41 °F to 122 °F);

Temperature:

Maximum output power derated above 30 °C (86 °F)

**Humidity:**Maximum relative humidity 80% for temperatures

up to 31 °C decreasing linearly to 50% relative humidity at 40 °C

**Altitude:**3000 m Maximum

**Environment:**Indoor Use Only, Pollution degree 2

**Equipment Class:**Group 1 Class A

**Transient Overvoltage:**Overvoltage Category II

This product bears the CE mark

## Models

### 8504

**Max Continuous Output Current: **80A RMS**Surge Rating: **2X power at up to 400 V_{P} or 150A**Apparent Power Rating: **Up to 5X continuous power rating at up to 400 V_{P} or 150A**Supply Voltage: **Single-phase, 208V ±10%, 30A, 50/60 Hz; 230V/240V ±10%, 30A version available**Dimensions (HxWxD): **5.25 x 19.0 x 25.26 in. (13.34 x 48.26 x 64.16 cm)**Weight: **84 lbs. (38.1 kg)

### 8508

**Max Continuous Output Current: **160A RMS**Surge Rating: **2X power at up to 400 V_{P} or 300A**Apparent Power Rating: **Up to 5X continuous power rating at up to 400 V_{P} or 300A**Supply Voltage: **Three-phase, 208V ±10%, 30A, 50/60 Hz; 400V ±10%, 30A version available. .**Dimensions (HxWxD): **35.05 x 22.56 x 31.56 inches (89.03 x 57.3 x 80.16 cm)**Weight: **Appx. 290 lbs. (131.5 kg)

### 8512

**Max Continuous Output Current: **240A RMS**Surge Rating: **2X power at up to 400 V_{P} or 450A**Apparent Power Rating: **Up to 5X continuous power rating at up to 400 V_{P }or 450A**Supply Voltage: **Three-phase, 208V ±10%, 30A, 50/60 Hz; 400V ±10%, 30A version available.**Dimensions (HxWxD): **35.05 x 22.56 x 31.56 inches (89.03 x 57.3 x 80.16 cm)**Weight: **Appx. 370 lbs. (167.8 kg)

### 8516

**Max Continuous Output Current: **320A RMS**Surge Rating: **2X power at up to 400 V_{P} or 600A**Apparent Power Rating: **Up to 5X continuous power rating at up to 400 V_{P }or 600A**Supply Voltage: **Three-phase, 208V ±10%, 60A, 50/60 Hz; 400V ±10%, 60A version available.**Dimensions (HxWxD): **42.05 x 22.56 x 31.56 inches (106.81 x 57.3 x 80.16 cm)**Weight: **Appx. 460 lbs. (208.7 kg)

### 8520

**Max Continuous Output Current: **400A RMS**Surge Rating: **2X power at up to 400 V_{P} or 750A**Apparent Power Rating: **Up to 5X continuous power rating at up to 400 V_{P} or 750A**Supply Voltage: **Three-phase, 208V ±10%, 60A, 50/60 Hz; 400V ±10%, 60A version available.**Dimensions (HxWxD): **45.80 x 22.56 x 31.56 inches (116.33 x 57.3 x 80.16 cm)**Weight: **Appx. 540 lbs. (244.9 kg)

### 8524

**Max Continuous Output Current: **480A RMS**Surge Rating: **2X power at up to 400 V_{P} or 900A**Apparent Power Rating: **Up to 5X continuous power rating at up to 400 V_{P} or 900A**Supply Voltage: **Three-phase, 208V ±10%, 60A, 50/60 Hz; 400V ±10%, 60A version available.**Dimensions (HxWxD): **51.05 x 22.56 x 31.56 inches (129.67 x 57.3 x 80.16 cm)**Weight: **Appx. 620 lbs. (281.2 kg)

Note: 8508, 8512, 8516, 8520 and 8524 model dimensions and weights are subject to change.

## Controls, Indicators, and Connectors

## Configuration Settings

## Downloads

#### 8500 Series Datasheet

Complete technical specifications

#### 8504 Manual

For model 8504 amplifiers

#### 8504 Manual (CE)

For CE-marked 8504 amplifiers