8640
DC-50kHz, 40kW Switch-Mode Amplifier
8640
40 kW (up to 120 kVA), up to 320A continuous
- Bandwidth: DC to 50 kHz
- Voltage: 0 to 260 VRMS; 0 to 400 VDC
- Slew rate: Up to 80 V/µs
- Current: Up to 320 ARMS*
- Distortion: <0.2%
- Power: 40 kW*
- Power levels up to 2X rated power when driving reactive loads
- High power efficiency and density
*Models available with output power from 10 kW to 60 kW (capable of up to 120 kVA).
OVERVIEW
8640 amplifiers are 400Vp, low-noise, DC-to-50-kHz switch-mode amplifiers. They are fast enough for most DC automotive dropout testing and capable of AC voltages required for ISO 61000 and Aviation testing. Plus, they have low enough noise and distortion specifications to be the reference power source in power quality measurements. The 8640 amplifier is capable of reproducing AC, DC and AC+DC waveforms into loads from a dead short to high impedance. It can be used to simulate a battery at 13.5 VDC or be an AC source with a L-N potential of up to 260 VAC. Rated current, for a given voltage, is available for all waveform types (AC, DC or AC+DC) at frequencies from DC to 50 kHz. Voltages from 0 to 260 VRMS are available with no changes in configuration.
The 8640 excels when it comes to driving reactive loads. As frequencies increase, the effective impedance of the load becomes a much larger part of the total load to be driven (especially with inductive loads like coils). However, when driving reactive loads, the 8640 is capable of receiving, reprocessing and returning to the load up to 2X its rated power.
Configurable:
A key to everyday product usability is quick and easy product (re)configuration. The 8600 Series provides all key configuration controls on the back panel of the unit. Configuration options available include:
- GAIN: Fixed or variable gain (0.16 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)
- REMOTE SENSE: Correction to voltage drops between amplifier and the load
OUTPUT CHART
Output
| CONTINUOUS AC OUTPUT CURRENT | CONTINUOUS DC OUTPUT CURRENT* | ||||||||||||
| VOLTS RMS |
8610 | 8620 | 8630 | 8640 | 8650 | 8660 | VOLTS DC |
8610 | 8620 | 8630 | 8640 | 8650 | 8660 |
| 60 | 80A | 160A | 240A | 320A | 400A | 480A | 13.5-125 | 80A | 160A | 240A | 320A | 400A | 480A |
| 120 | 70A | 140A | 210A | 280A | 350A | 420A | 125-370* | 10kW | 20kW | 30kW | 40kW | 50kW | 60kW |
| 230 | 35A | 70A | 105A | 140A | 175A | 210A | |||||||
Note: 8610 power ratings shown are for unit configured for 240VAC. Performance data is for a purely resistive load; performance will be improved into loads that are partially or completely reactive.
* kW/V = A Limit
PERFORMANCE
SPECIFICATIONS
Performance Specifications
- Operating Modes: AC, DC and AC + DC
- Frequency, AC Mode Output (-3 dB): DC – 50 kHz
- Max Voltage Ranges (no load):
- AC: 0 – 260 VRMS
- AC + DC: 0 – ±400 VP
- Max Continuous Output Current: 320A RMS
- Surge Rating: 2X power at up to 400Vp or 600A
- Apparent Power Rating: Up to 2X continuous power rating at up to 400 Vp or 600A
- Supply Voltage: Three-phase, 208V ±10% 120A, 50/60 Hz, 400VAC ±10%, 5-Wire 80A version available
- 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%
- THD: .02% at 1kHz
- 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
- Propagation Delay: 8 µsec
- Efficiency: 89%, typical
- Power Factor: .92, typical
- Source Impedance: less than 50 mΩ + less than 10 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);
- 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
- Dimensions (HxWxD): 48.55 x 22.56 x 31.56 in (123.32 x 57.3 x 80.16 cm)
- Weight (approx): 380 lbs. (172.4 kg)
PHOTOS
Controls, Indicators and Connectors
DOCUMENTS / DOWNLOADS
| 8600 Data Sheet | Configuration Settings | ||
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