MT Series power supplies have extensive diagnostic functions, including: phase loss, excessive thermal conditions, over voltage trip (programmable), over current trip (programmable), cleared fuse, and excessive program line voltage. When in standby or diagnostic fault, the AC mains are mechanically disconnected via an embedded AC contactor, providing confidence that the unit is only processing power when desired.
For maximum flexibility, all MT Series power supplies can be scaled a in master-slave configuration for higher voltage or current output. Using the plug and play Universal Interface Device (+UID47), units are tied together in via their 37-pin I/O, allowing an increase in system current when configured in parallel or increase in system voltage when configured in series—up to the power supply's output isolation rating.
All MT Series power supplies come standard with a National Instruments LabVIEW™ and LabWindows™/CVI drivers. In addition, an IVI driver is included supporting Visual C++, Visual C#, Visual Basic .NET, MATLAB, Measure Foundry, PAWS, Visual Basic 6.0, and Agilent VEE Pro. A Standard Commands for Programmable Instrumentation (SCPI) command set is also supported, allowing programming using raw ASCII commands. Finally, Magna-Power's RIS Panel software is provided allowing for a virtual control panel controlling the power supply via any of the available communication interfaces.
Magna-Power's Harmonic Neutralizers eliminate families of harmonic components by multiplying the number of input phases with specially wound magnetic components, reducing the total harmonic distortion (THD). These magnetic components, in combination with equally loaded, high-power DC power supplies, offer a cost-effective solution to maintaining power quality at acceptable levels, enabling applications to benefit from Magna-Power's reliable high-frequency switch-mode power supplies, extended into multi-megawatts. A 12-pulse Harmonic Neutralizer is embedded in all 250 kW models and its installation is transparent to the end user. For applications demanding an even better THD level than that provided by a 12-pulse waveform, external 24-pulse and 48-pulse harmonic neutralizers are available from Magna-Power. Contact you local sales partner for more information.
The following figures are representative of expected AC current waveforms for the various pulses available from Magna-Power Electronics power supplies. Standard models 1.5 kW through 150 kW produce 6-pulse waveforms, while 250 kW models produce 12-pulse waveforms. Magna-Power Electronics Harmonic Neutralizers suppress families of harmonics by increasing the number of power phases. It can be used when multiple power supplies are used in series or parallel and are equally loaded. Harmonic Neutralizers can produce 12-pulse, 18-pulse, 24-pulse, or 48-pulse waveforms which have harmonic current components on the order of 12n±1, 18n±1, 24n±1, or 48n±1, respectively. The following figures show the theoretical difference for waveforms with a different number of pulses. Harmonic Neutralizers are protected with appropriate sized primary-side circuit breakers.
Input current harmonics are a by-product of nearly all power supplies. Power can only be delivered to the load if the frequency and phase of the voltage and current match. For a three phase power supply using a three phase input rectifier, the input current has a theoretical spectrum of 6n±1 where n is an integer incrementing from 1; this is known as a 6-pulse waveform. This means that a power supply with a three phase input rectifier will produce input currents at 1, 5, 7, 11, 13, 17, 19 ... times the fundamental frequency. The theoretical magnitude decays as the reciprocal of the harmonic component. The 5th and 7th harmonic components have magnitudes of 20% and 14% of the fundamental component, respectively.
Harmonics currents in power systems can find unusual paths and can cause problems if the magnitude is significant and there are loads sensitive to harmonic frequencies. For example, lighting ballasts have series connected capacitors and inductors which can be excited by harmonic currents. IEEE has introduced standard, IEEE 519, which defines recommended limits. Implementing this standard requires a knowledge of the power system and other loads producing harmonics. Unfortunately, the standard can allow the same power supply to possibly exceed limits in one application and not in another. In the same respect, a power supply may or may not can cause a harmonic related problem with or without meeting IEEE 519. The best solution to minimize the risk of a harmonic problem is to eliminate the harmonic current at the source.
There are hundreds of possible configurations for the MT Series product. Using the following ordering guide and models chart to define the best model for your application. Need less power? Visit our MS Series product line.
|100 kW||150 kW||250 kW||500 kW*||750 kW*||1000 kW*|
|Voltage Maximum||Current Maximum||Ripple (mVrms)||Eff. (%)|
|Input Current Per Phase (Aac)|
|380/415 Vac, 3Φ||191||287||478||956||1434||1912|
|440/480 Vac, 3Φ||165||248||413||826||1239||1652|
For models with the High Slew Rate Output Option (+HS), ripple will be higher. Power levels marked with an asterisk (*) are formed by master-slaving multiple 250 kW modules in master-slave parallel using the UID47 device.
3 phase, 3 wire + ground
380 VAC (operating range 342 - 440 VAC)
415 VAC (operating range 373 - 456 VAC)
440 VAC (operating range 396 - 484 VAC)
480 VAC (operating range 432 - 528 VAC)
|Frequency||50-60 Hz (operating range 45 Hz to 66 Hz)|
> 92% at maximum power 100 kW and 150 kW modules
> 96% at maximum power 250 kW modules
|Ripple||See Model Charts|
Voltage Mode: ± 0.004% of full scale
Current Mode: ± 0.02% of full scale
Voltage Mode: ± 0.01% of full scale
Current Mode: ± 0.04% of full scale
|Load Transient Response||2 ms to recover within ±1% of regulated output with a 50% to 100% or 100% to 50% step load change|
|Efficiency||≥ 90% (See Model Charts)|
|Stability||± 0.10% for 8 hrs. after 30 min. warmup|
User inputs and outputs: referenced to Earth ground
Maximum input voltage to ground: ±2500 Vac
Maximum output voltage to ground:
±1000 Vdc for models less than or equal to 1000 Vdc,
±4000 Vdc for models greater than 1000 Vdc.
|Maximum Slew Rate||
100 ms for an output voltage change from 0 to 63%,
100 ms for an output current change from 0 to 63%.
With High Slew Rate Option (+HS):
4 ms for an output voltage change from 0 to 63%,
8 ms for an output current change from 0 to 63%.
3 Hz with remote analog voltage programming,
2 Hz with remote analog current programming.
With High Slew Rate Option (+HS):
60 Hz with remote analog voltage programming,
45 Hz with remote analog current programming.
|Power||Size (H" x W" x D")||Weight|
|100 kW||62.5 x 48 x 31.5 in (158.8 x 121.9 x 80.0 cm)||1600 lbs (725.8 kg)|
|150 kW||62.5 x 48 x 31.5 in (158.8 x 121.9 x 80.0 cm)||2100 lbs (952.5 kg)|
|250 kW||62.5 x 72 x 31.5 in (158.8 x 182.9 x 80.0 cm)||3300 lbs (1496.9 kg)|
|500 kW||62.5 x 144 x 31.5 in (158.8 x 365.8 x 80.0 cm)||6600 lbs (2993.7 kg)|
|750 kW||62.5 x 216 x 31.5 in (158.8 x 548.7 x 80.0 cm)||9900 lbs (4490.6 kg)|
|1000 kW||62.5 x 288 x 31.5 in (158.8 x 731.6 x 80.0 cm)||13200 lbs (5987.4 kg)|
|Voltage Programming Accuracy||± 0.075% of full scale voltage|
|OVT Programming Accuracy||± 0.075% of full scale voltage|
|Current Programming Accuracy||± 0.075% of full scale current|
|OCT Programming Accuracy||± 0.075% of full scale current|
|Voltage Readback Accuracy||± 0.2% of full scale voltage|
|Current Readback Accuracy||± 0.2% of full scale current|
|External Analog Programming and Monitoring Levels||0 - 10 Vdc|
|External Analog Output Impedances||
Voltage output monitoring: 100 Ω
Current output monitoring: 100 Ω
+10 Vdc reference: 1 Ω
|External Digital Programming and Monitoring Limits||
Input: 0 to 5 Vdc, 10 kΩ input impedance
Output: 0 to 5 Vdc, 5 mA drive capacity
|Remote Sense Limits||3% maximum voltage drop from output to load|
|Operating Temperature||0°C to 50°C|
|Storage Temperature||-25°C to +85°C|
|Ambient Temperature||0 to 50°C|
0.04%/°C of maximum output voltage,
0.06%/°C of maximum output current.
|Air Cooling||Front and rear intake, top exhaust|
Note: 150 kW model pictured in diagrams titled "100 kW and 150 kW Models." 100 kW models will have the front panel on the left side as opposed to the right.
The following options are available for the MT Series programmable DC power supply: