MT Series VI: 100 kW to 2000 kW+

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Overview

Innovative and Scalable

Magna-Power Electronics MT Series combines the best of DC power processing with microprocessor embedded control. A combination of high and medium frequency power processing technologies improves response, shrinks package size, and reduces cost. MT Series power supplies are current-fed and are more tolerant to abusive loads than conventional switching power supplies. This technology allows the power supply to operate under short-circuit conditions, open-circuit conditions, and everything in between.

MT Series power supplies offer both master/slave parallel and series operation. This enables two or more power supplies to be placed in parallel for increased output current or in series for increased output voltage. With master/slave operation, power supplies operate at near equal voltage and current. The process of master/slaving power supplies is plug & play with the use of Magna-Power Electronics UID46 option, which can be added at any time. 

MT Series power supplies can operate as a voltage source or current source depending on the control settings and load conditions. If the power supply is operating as a voltage source and the load increases to a point beyond the current command setting, the power supply automatically crosses over to current mode control and operates as a current source at that setting.

Designed for Safety

The MT Series power supplies have extensive diagnostic functions -- all of which, when activated, take command to shut down the system. Diagnostic functions include phase loss, excessive thermal conditions, over voltage trip, over current trip, fuse clearing, and program line. Program line monitors externally applied analog set point signals to insure they are within the specified range. Upon a diagnostic fault condition, main power is disconnected and the diagnostic condition is latched into memory. Pressing the clear key clears the memory. All diagnostic functions can be monitored through a rear connector. Furthermore, control functions can also be set through the rear connector to allow simultaneous control of one or more MT Series units.

MT Series supplies have three levels of over voltage/current protection: shutdown of controlling insulated gate bipolar transistors (IGBT’s), disconnect of main power, and input fuses. After an over voltage/current trip condition, the supply must be reset.

Load Dependent Air Cooling

The MT Series power supplies are designed to operate at rated load 24 hours per day. Standard air cooled units are equipped with variable speed, load dependent blowers to maintain comfortable margins for removing heat from sensitive power semiconductors. Variable speed operation maximizes fan life and a minimizes external environmental hazards.

Fully Programmable

The MT Series power supplies can be programmed and monitored using three possible sources:

  • Stepless front panel programming knobs
  • External analog/digital signals
  • Computer interface through software or SCPI

The power supply can be programmed to have its control functions accessible from the front panel, rear connector, RS232 (standard), LXI TCP/IP Ethernet, IEEE 488.2 GPIB, USB Edgeport, or RS485DSS communications. An extensive selection of drivers, including IVI, LabVIEW, and LabWindows™ allow users to get started quickly in a variety of programming environments for programming using supported Standard Commands for Programmable Instruments (SCPI). Use of included Remote Interface Software allows extensive computer controls and a virtual front panel. Sensing can be established at the output terminal of the power supply or through a rear remote sense terminals for sensing at the load. An external interlock can be set to enable operation only when an external connection is made. Even calibration has been simplified with front panel access to calibration digital potentiometers.

Isolated External I/O for Automation

Using the rear 37-pin I/O connector, the MT Series power supplies can be completely controlled and monitored using external signals. The voltage, current, over voltage trip, and over current trip set points are set by applying a 0-10 Vdc signal. Each diagnostic condition is given a designated pin, which reads 5 Vdc when high. In addition, reference 5 Vdc and 10 Vdc signals are provided, eliminating the need for external voltage signals and allowing the use of dry contacts. Also, the power supply features an external interlock, which when enabled, allows the power supply to be tied in with other emergency stop equipment. All these pins are isolated to earth-ground as standard--no additional isolation equipment or options necessary. For more information, read External Pin (JS1) and PLC Integration Guide.

Attention to Power Quality

The MT Series power supplies contain circuitry to work harmoniously with other power equipment. Step-start contactors are used to keep inrush current below full scale operating current. Filter components lower current harmonic content emanating from the power supply and increase power factor to levels beyond 90%, regardless of the input voltage selection. Every power supply is tested at 90% to 125% nominal line to insure satisfactory operation even under the worst line voltage conditions.

Integrated Harmonic Neutralizer (250 kW Modules Only)

Magna-Power Electronics integrated 250 kW harmonic neutralizers eliminate families of harmonic components by multiplying the number of input phases with specially wound autotransformers. These transformers; in combination with equally loaded, high-power, dc power supplies; offer a cost effective solution to maintaining power quality at acceptable levels.

Why Neutralize Harmonics?

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.


Figure 1. (a) 6 and (b) 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 waveforms which have harmonic current components on the order of 12n±1. Figure 1 shows the theoretical difference between 6-pulse and 12-pulse waveforms. Figure 2 shows the resulting spectral differences. Harmonic neutralizers are protected with appropriate sized circuit breakers.


Figure 2. Normalized input harmonic current spectrum for (a) 6, (b) 12, and (c) 18-pulse waveforms

Specifications

Input
Nominal Voltage
3 phase, 3 wire + ground		 380 VAC (operating range 342 - 418 VAC)
415 VAC (operating range 373 - 456 VAC)
440 VAC (operating range 396 - 484 VAC)
480 VAC (operating range 432 - 528 VAC)
Frequency 50 Hz (operating range 45 Hz - 55 Hz)
60 Hz (operating range 54 Hz - 66 Hz)
Power Factor > 92% at max. power 100 kW and 150 kW modules
> 96% at maximum power 250 kW modules
Environmental
Operating Temperature 0°C to 50°C
Storage Temperature -25°C to +85°C
Air Cooling Front and rear intake, top exhaust
Physical
Power Input Phases Size (H" x W" x D") Weight
100 kW
150 kW
250 kW
500 kW
750 kW
1000 kW		 3Φ
3Φ
3Φ
3Φ
3Φ
3Φ		 62.5 x 48 x 31.5 in (158.8 x 121.9 x 80.0 cm)
62.5 x 48 x 31.5 in (158.8 x 121.9 x 80.0 cm)
62.5 x 72 x 31.5 in (158.8 x 182.9 x 80.0 cm)
62.5 x 144 x 31.5 in (158.8 x 365.8 x 80.0 cm)
62.5 x 216 x 31.5 in (158.8 x 548.7 x 80.0 cm)
62.5 x 288 x 31.5 in (158.8 x 731.6 x 80.0 cm)		 1600 lbs (725.8 kg)
2100 lbs (952.5 kg)
3300 lbs (1496.9 kg)
6600 lbs (2993.7 kg)
9900 lbs (4490.6 kg)
13200 lbs (5987.4 kg)
Output
Ripple See Model Charts
Line Regulation Voltage Mode: ± 0.004% of full scale
Current Mode: ± 0.02% of full scale
Load Regulation 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
Isolation 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 Standard Models:
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):
6 ms for an output voltage change from 0 to 63%,
12 ms for an output current change from 0 to 63%.
Bandwidth Standard Models:
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.
Programming Levels and Accuracy of Full Scale
  Voltage
Set Point		 Current
Set Point		 OVT
Set Point		 OCT
Set Point
Remote Analog Programming Accuracy ± 0.075% ± 0.075% ± 0.075% ± 0.075%
Digital Programming Accuracy ± 0.075% ± 0.075% ± 0.075% ± 0.075%
Remote Analog Programming Levels 0 - 10.0 Vdc 0 - 10.0 Vdc 0 - 10.0 Vdc 0 - 10.0 Vdc
Monitoring Levels and Accuracy of Full Scale
  Output Voltage Output Current
Remote Analog Monitoring Accuracy ± 0.2% ± 0.2%
Digital Monitoring Accuracy ± 0.2% ± 0.2%
Remote Analog Monitoring Levels 0 - 10.0 V 0 - 10.0 V
Control Limits
Remote Sense Limits 3% maximum voltage drop from output terminals to load. Remote sense is not available for models with output voltages greater than 1000 Vdc.
Period Programming Limits Minimum period: 10 msec
Maximum Period: 9997 sec or 2.77 hours
Digital control inputs and outputs limits Input voltage: 0 to 5 Vdc, 10K input impedance;
Output voltage: 0 to 5 Vdc, 5 mA drive capacity
5 V supply: 25 mA.

Models

100 kW Models
Model Voltage
(Vdc)		 Current
(Adc)		 Ripple
(mVrms)		 Eff.
%		 3Φ Input Current (Aac)
380/415 V 440/480 V
MTA16-6000 0-16 0-6000 35 90 191 165
MTA20-5000 0-20 0-5000 40 90 191 165
MTA32-3000 0-32 0-3000 40 90 191 165
MTA40-2500 0-40 0-2500 40 91 191 165
MTA50-2000 0-50 0-2000 50 91 191 165
MTA80-1250 0-80 0-1250 60 91 191 165
MTA100-1000 0-100 0-1000 60 91 186 160
MTA125-800 0-125 0-800 100 91 186 160
MTA160-620 0-160 0-620 120 91 186 160
MTA200-500 0-200 0-500 125 91 186 160
MTA250-400 0-250 0-400 130 92 186 160
MTA375-270 0-375 0-270 170 92 186 160
MTA400-250 0-400 0-250 180 92 186 160
MTA500-200 0-500 0-200 220 92 186 160
MTA600-160 0-600 0-160 250 92 186 160
MTA800-120 0-800 0-120 300 92 186 160
MTA1000-100 0-1000 0-100 400 92 186 160
MTA1250-80 0-1250 0-80 500 92 186 160
MTA1600-62 0-1600 0-62 600 92 186 160
MTA2000-50 0-2000 0-50 800 92 186 160
MTA2500-40 0-2500 0-40 900 92 186 160
MTA3000-32 0-3000 0-32 1000 92 186 160
MTA4000-24 0-4000 0-24 1100 92 186 160
150 kW Models
Model Voltage
(Vdc)		 Current
(Adc)		 Ripple
(mVrms)		 Eff.
%		 3Φ Input Current (Aac)
380/415 V 440/480 V
MTA25-6000 0-25 0-6000 40 90 287 248
MTA32-4500 0-32 0-4500 40 90 287 248
MTA40-3750 0-40 0-3750 40 91 287 248
MTA50-3000 0-50 0-3000 50 91 287 248
MTA80-1850 0-80 0-1850 60 91 287 248
MTA100-1500 0-100 0-1500 60 91 278 248
MTA125-1200 0-125 0-1200 100 91 278 248
MTA160-900 0-160 0-900 120 91 278 248
MTA200-750 0-200 0-750 125 91 278 248
MTA250-600 0-250 0-600 130 92 278 248
MTA375-400 0-375 0-400 170 92 278 248
MTA400-375 0-400 0-375 180 92 278 248
MTA500-300 0-500 0-300 220 92 278 248
MTA600-240 0-600 0-240 250 92 278 248
MTA800-180 0-800 0-180 300 92 278 248
MTA1000-150 0-1000 0-150 400 92 278 248
MTA1250-120 0-1250 0-120 500 92 278 248
MTA1600-90 0-1600 0-90 600 92 278 248
MTA2000-75 0-2000 0-75 800 92 278 248
MTA2500-60 0-2500 0-60 900 92 278 248
MTA3000-48 0-3000 0-48 1000 92 278 248
MTA4000-36 0-4000 0-36 1100 92 278 248
250 kW Models
Model Voltage
(Vdc)		 Current
(Adc)		 Ripple
(mVrms)		 Eff.
%		 3Φ Input Current (Aac)
380/415 V 440/480 V
MTA40-6000 0-40 0-6000 40 90 478 413
MTA50-5000 0-50 0-5000 50 90 478 413
MTA80-3000 0-80 0-3000 60 90 478 413
MTA100-2500 0-100 0-2500 60 91 478 413
MTA125-2000 0-125 0-2000 100 91 478 413
MTA160-1500 0-160 0-1500 120 91 478 413
MTA200-1250 0-200 0-1250 125 91 478 413
MTA250-1000 0-250 0-1000 130 91 465 400
MTA375-660 0-375 0-660 170 91 465 400
MTA400-625 0-400 0-625 180 91 465 400
MTA500-500 0-500 0-500 220 91 465 400
MTA600-400 0-600 0-400 250 92 465 400
MTA800-300 0-800 0-300 300 92 465 400
MTA1000-250 0-1000 0-250 400 92 465 400
MTA1250-200 0-1250 0-200 500 92 465 400
MTA1600-150 0-1600 0-150 600 92 465 400
MTA2000-125 0-2000 0-125 800 92 465 400
MTA2500-100 0-2500 0-100 900 92 465 400
MTA3000-80 0-3000 0-80 1000 92 465 400
MTA4000-60 0-4000 0-60 1100 92 465 400
500 kW Models*
Model Voltage
(Vdc)		 Current
(Adc)		 Ripple
(mVrms)		 Eff.
%		 3Φ Input Current (Aac)
380/415 V 440/480 V
MTA40-12000 0-40 0-12000 40 90 956 826
MTA50-10000 0-50 0-10000 50 90 956 826
MTA80-6000 0-80 0-6000 60 90 956 826
MTA100-5000 0-100 0-5000 60 91 956 826
MTA125-4000 0-125 0-4000 100 91 956 826
MTA160-3000 0-160 0-3000 120 91 956 826
MTA200-2500 0-200 0-2500 125 91 956 826
MTA250-2000 0-250 0-2000 130 91 930 800
MTA375-1320 0-375 0-1320 170 91 930 800
MTA400-1250 0-400 0-1250 180 91 930 800
MTA500-1000 0-500 0-1000 220 91 930 800
MTA600-800 0-600 0-800 250 92 930 800
MTA800-600 0-800 0-600 300 92 930 800
MTA1000-500 0-1000 0-500 800 92 930 800
MTA1250-400 0-1250 0-400 500 92 930 800
MTA1600-300 0-1600 0-300 600 92 930 800
MTA2000-250 0-2000 0-250 800 92 930 800
MTA2500-200 0-2500 0-200 900 92 930 800
MTA3000-160 0-3000 0-160 1000 92 930 800
MTA4000-120 0-4000 0-120 1100 92 930 800
750 kW Models*
Model Voltage
(Vdc)		 Current
(Adc)		 Ripple
(mVrms)		 Eff.
%		 3Φ Input Current (Aac)
380/415 V 440/480 V
MTA40-18000 0-40 0-18000 40 90 1434 1239
MTA50-15000 0-50 0-15000 50 90 1434 1239
MTA80-9000 0-80 0-9000 60 90 1434 1239
MTA100-7500 0-100 0-7500 60 91 1434 1239
MTA125-6000 0-125 0-6000 100 91 1434 1239
MTA160-4500 0-160 0-4500 120 91 1434 1239
MTA200-3750 0-200 0-3750 125 91 1434 1239
MTA250-3000 0-250 0-3000 130 91 1395 1200
MTA375-1980 0-375 0-1980 170 91 1395 1200
MTA400-1875 0-400 0-1875 180 91 1395 1200
MTA500-1500 0-500 0-1500 220 91 1395 1200
MTA600-1200 0-600 0-1200 250 92 1395 1200
MTA800-900 0-800 0-900 300 92 1395 1200
MTA1000-750 0-1000 0-750 400 92 1395 1200
MTA1250-600 0-1250 0-600 500 92 1395 1200
MTA1600-450 0-1600 0-450 600 92 1395 1200
MTA2000-375 0-2000 0-375 800 92 1395 1200
MTA2500-300 0-2500 0-300 900 92 1395 1200
MTA3000-240 0-3000 0-240 1000 92 1395 1200
MTA4000-180 0-4000 0-180 1100 92 1395 1200
1000 kW Models*
Model Voltage
(Vdc)		 Current
(Adc)		 Ripple
(mVrms)		 Eff.
%		 3Φ Input Current (Aac)
380/415 V 440/480 V
MTA40-24000 0-40 0-24000 40 90 1912 1652
MTA50-20000 0-50 0-20000 50 90 1912 1652
MTA80-12500 0-80 0-12500 60 90 1912 1652
MTA100-10000 0-100 0-10000 60 91 1912 1652
MTA125-8000 0-125 0-8000 100 91 1912 1652
MTA160-6000 0-160 0-6000 120 91 1912 1652
MTA200-5000 0-200 0-5000 125 91 1912 1652
MTA250-4000 0-250 0-4000 130 91 1860 1600
MTA375-2640 0-375 0-2640 170 91 1860 1600
MTA400-2500 0-400 0-2500 180 91 1860 1600
MTA500-2000 0-500 0-2000 220 91 1860 1600
MTA600-1600 0-600 0-1600 250 92 1860 1600
MTA800-1200 0-800 0-1200 300 92 1860 1600
MTA1000-1000 0-1000 0-1000 1600 92 1860 1600
MTA1250-800 0-1250 0-800 500 92 1860 1600
MTA1600-600 0-1600 0-600 600 92 1860 1600
MTA2000-500 0-2000 0-500 800 92 1860 1600
MTA2500-400 0-2500 0-400 900 92 1860 1600
MTA3000-320 0-3000 0-300 1000 92 1860 1600
MTA4000-240 0-4000 0-240 1100 92 1860 1600

*By paralleling multiple 250 kW modules using the UID46 device

Controls

Analog Control - A Series

MT Series models utilizing the A Version front panel, MTA, provide stepless analog control from front panel potentiometers. With simple configuration changes, voltage, current, over voltage trip, and over current trip may also be programmed from the rear connector or with RS232, optional IEEE 488.2 GPIB, LXI TCP/IP Ethernet, USB, or RS485 communications. MTA Series power supplies are well suited for industrial applications requiring a minimum of control.

Digital Control - D Series

MT Series models utilizing the D Version front panel, MTD, provide all of the features of the A Version plus these models can be configured for keypad entries and up/down presses for voltage, current, over voltage trip, and over current trip. Key strokes are kept to a minimum by a repeat last command feature. MTD Series power supplies are well suited for laboratory applications requiring enhanced control.

MTD Series models have one-hundred memory states available to program voltage, current, over voltage trip, over current trip, and time period. Set points can be auto sequenced with time or external triggering. Special programming codes allow repeating to create a power function generator. The first 10 memory states are displayed on the front panel to simplify programming tasks.

MTD Series power supplies offer an analog input to modulate the voltage or current setting using piecewise linear approximation. This feature enables the voltage or current setting to be adjusted by a sensor input, such as a thermistor, or by monitoring its own voltage or current. Modulation allows the output to be tailored for advanced process control applications, battery charging, and source emulation.

Computer Control - C Series

MT Series models utilizing the C Version front panel, MTC, only allow control from the rear connector or by RS232, optional IEEE 488.2 GPIB, LXI TCP/IP Ethernet, USB, or RS485 communications. These models are intended for process control applications where front panel controls and displays are not required or desired.

Front Panel Features Comparison

Features MTC MTA MTD
FRONT PANEL CONTROLS      
Power on/off • • •
Start/Stop   • •
Rotary Voltage/Current Entry   • •
Rotary OVT/OCT Entry   • •
Menu/Item   • •
Display Settings   • •
Enter/Clear   • •
Keypad Voltage/Current Entry     •
Keypad OVT/OCT Entry     •
Arm     •
INDICATORS      
Voltage/Current Set Point   • •
OVT/OCT Set Point   • •
Voltage/Current Output   • •
Internal/External Control   • •
Alarms   • •
Rotary/External/Remote Programming   • •
Remote Sense Enabled   • •
Keypad Programming     •
Memory Setting     •
Armed for Auto Sequence Operation     •
REAR PANEL CONTROLS      
Voltage/Current Set Point • • •
OVT/OCT Set Point • • •
Modulation Set Point     •
Voltage/Current Output • • •
Internal/External Control • • •
Alarm Output (9 lines) • • •
Status Output (6 lines) • • •
Master/Slave Connections • • •
Remote Sense Inputs • • •
RS232 Inputs • • •
Interlock Enable • • •
Arm Enable     •

Isolated External I/O for Automation

Using the rear 37-pin I/O connector, the MT Series power supplies can be completely controlled and monitored using external signals. The voltage, current, over voltage trip, and over current trip set points are set by applying a 0-10 Vdc signal. Each diagnostic condition is given a designated pin, which reads 10 Vdc when high. Also, the power supply features an external interlock, which when enabled, allows the power supply to be tied in with other emergency stop equipment. All these pins are isolated to earth-ground as standard; no additional isolation equipment necessary.

Reference Dimensions

Download MT Series V Drawing (100 kW and 150 kW)

Download MT Series V Drawing (250 kW)

Front Panel Dimensions (100 kW and 150 kW Modules)

Rear Panel Dimensions (100 kW and 150 kW Modules)

Front Panel Dimensions (250 kW Modules)

Rear Panel Dimensions (250 kW Modules)

Output Bus Bar Dimensions