Inverters >2k Watt (MX/XO) and Accessories: System Monitor Card and Solid State Transfer Switch

MX Series Inverters

MX Series Inverters are the world’s first truly redundant, modular inverter system; the most reliable inverter system available. Inverter systems up to 20KW at 120 Vac single phase, 40KW at 240 Vac bi-phase or 60KW at 208 Vac 3 phase.

EXELTECH manufactures the world’s first truly redundant, modular inverter system; the most reliable inverter system available. No single malfunction will cause the inverter system to fail. Modules are “hot” insertable. Power levels are expandable, and modules can be added or replaced without interruption to power to your critical loads.

The MX system can be configured for power levels from 1 to 20KW with 120 Vac output. Up to 40KW at 240 Vac bi-phase or 60KW at 208 Vac 3 phase with many input and output voltages also available.

A control card and any number of additional 1000 Watt power modules combine to make a standard inverter. This type of system can be expanded as power requirements are increased and upgraded to be N+1 redundant as desired.

The MX system is extremely compact and lightweight. Power modules weigh only seven pounds each.

Output voltage is precisely regulated, so that no measurable voltage change occurs on the output as input voltage fluctuates. Similarly, less than 0.5 volt change in output voltage will occur when the output load varies from 0 to 100% of rated power. With distortion of 2% maximum, this inverter offers the cleanest sine wave power available.

Models are available that cover all standard battery systems. Custom models can be designed to meet your specific input voltage requirements.

  • N+1 Redundant
  • Expandable
  • Remote Switching
  • True Sine Wave
  • “HOT” Insertable
  • 1000 Watt Modules
  • Remote Metering
  • Adjustable Power

 

MX Solid State Transfer Switch

MX Solid State Transfer Switch

MX Systems Monitor

MX Systems Monitor

Expandable Inverter System

N+1 Redundant-Exandable Inverter System

MX Series Systems Design Chart

MX Series System Part Number

MX Series Module Part Number

MX Series Upgradable

 

MX Series Inverters Specifications

Output-Power3

MX Options

EXELTECH offers many options, such as:

Option (08) Low Idle Current Drain: A ferrite bar across the inductor to aid in reducing power draw when the unit is on but under no load.

Option (07) Conformal Coating: This protects the circuit board in high humidity or airborne contaminant environments.

For details on all available options, please Contact Us

MX Series Accessories

System Monitor Card
Normal operation of the Monitor Card is exactly the same as a standard EXELTECH Alarm Card, with the notable exception of remote monitoring of system status. A blinking LED for the new alarm state announces new alarm states; pressing either button stops the blinking, and Alarm Details will give a listing of any alarms that have been activated.

Solid State Transfer Switch
Switch capable of reporting AC voltage, current, and frequency for both the primary source and the secondary source. Major and minor alarm contacts are available for local monitoring of any potential fail state. When used as a 5KW single 23″ cage system, it also works as a system monitor card. Available in three power levels: 5KW, 10KW, and 20KW. Also available for single, split, or 3 phase systems.

Transfer Switch/Relay:
4MS automatic switch with user selectable primary AC source. Available in 5KW, 7.5KW, and 10KW models.

Meter:
LCDs featuring AC volts, AC Amps, DC volts, and DC amps.

AC Outlet:
8 NEMA plugs, 1U in height with master on – off. Available in 19″ or 23″ systems. Also avail with 6 NEMA plugs in a 3.2″ x 7 module without master on – off.

Maintenance Bypass Switch:
Allows for complete bypass of the inverter for maintenance.

A/B Buss:
For Redundant DC sources.

AC Distribution Panel:
Up to six breakers rated at 1 Amp up to 30 Amps.

DC Distribution Panel:
Up to six breakers rated at 1 Amp up to 30 Amps.

MX Series Module Description

The Exeltech MX Series of inverters is a modular system which can be assembled in many combinations to afford the user infinite flexibility. Options such as AC distribution, AC disconnect, metering, DC disconnect, DC distribution, transfer switch and maintenance bypass switch are also available; (see accessories).

The building blocks of the system are as follows:

  1. Power Module – A1000 Watt slave power inverter. It requires drive signals from a Master Module or Control Card as described below. This module is the backbone of the inverter system.
  2. Master Module – A1000 Watt power inverter that contains all the electronics necessary to operate. Requires an enclosure to provide connections to the battery and AC output. It can also operate up to 19 slave Power Modules. If this module is used, the system cannot be fully redundant.

All MX systems require either a master module or at least one control card.

  1. Control Card – Generates all the signals necessary to operate up to 20 Power Modules. The card itself will not generate any AC output power, nor does any power flow through it. This card can be paralleled with another Control Card to generate a redundant set of control signals to form the basis of a completely redundant inverter system.

All MX systems require either a master module or at least one control card.

  1. Alarm Card – Can be used in conjunction with a redundant or non-redundant inverter to provide various alarm output signals via LED’s and alarm contact closures. Must be included in redundant systems to detect failure of control card.
  2. Transfer Switch – Provides the same functions as the alarm card, plus provides a relay to transfer AC power to the load, from either the inverter or the utility input. Use only with systems 7KW or less.

The above modules can be placed in the following enclosures. Installations can either be free standing or in standard relay racks.

  1. 19″ cage assembly – Compatible with a 19″ relay rack. The smallest cage which can contain a redundant system. Available in the following configurations:

19A – Basic configuration for a redundant system. Holds up to 4 Power Modules, 2 Control Cards and either a Transfer Switch, System Monitor Card, or an Alarm Card.

19B – Used as an expansion rack or may be used as an expandable, non-redundant inverter, up to 5 KW.

This configuration will not accept X-fer Switch, alarm card, or control cards.

  1. 23″ cage assembly – Compatible with a 23″ relay rack.

23A – Basic configuration for a redundant system. Holds up to 5 Power Modules, 2 Control Cards and either a Static Transfer Switch, Transfer Switch, System Monitor II, or an Alarm Card.

23B – Used as an expansion rack or may be used as an expandable, non redundant inverter, up to 6 KW.

This configuration will not accept X-fer Switch, alarm card, or control cards.

  1. 7″ cage assembly – for 1 or 2 KW systems when redundancy is not required.

7C – Consists of 1Transfer Switch and 1 Master Module.

This configuration will not accept an alarm card or control cards.

7B -   Expandable up to 2KW.1 Master Module and 1 Power Module.

This configuration will not accept X-fer switch, alarm card or control cards.

  1. 9″ cage assembly- for 1-3KWsystems when redundancy is not required.

9C  – Consists of Transfer Switch, 1 Master Module, and 1 Power Module.

This configuration will not accept an alarm card or control cards.

9B – Expandable up to 3KW.1 Master Module and 2 Power Modules.

This configuration will not accept X-fer Switch, alarm card or control cards.

MX Series System Description

The Exeltech MX Series of inverters is available in three basic architectures; redundant, upgradable, and expandable. Different options and sizes are available to fit varying applications. As a benefit of the MX series modular design, power levels are expandable in any system, as power requirements increase.

  1. N+1 Redundant-Expandable Inverter System: For applications where reliability and maintainability are paramount, the N+1 redundant system offers the most cost effective method of achieving redundancy and the ability to maintain the system while loads remain on line. All cards (except 12Vdc) are “hot” insertable to allow maintenance without interrupting power to critical loads. Designing the power level with N+1 number of power modules, allows for redundancy without necessitating the purchase of a duplicate system. (An A/B Buss option is available, which adds to system reliability).

  1. Upgradable Inverter System: The Upgradable system offers the flexibility to add a X-fer switch or alarm card and Full Redundancy for future requirements. A minimum system with as little as one control card and one power module can be upgraded in the future to include additional power modules, X-fer switch or alarm card and an additional control card for full redundancy (see figure II).

Upgradable System

  1. Expandable inverter system: This configuration can be used as an independent inverter system (figure III), or to expand power levels of existing MX systems (see stacked systems). By using one master module, a system can be expanded to include a X-fer switch and additional power modules (see figure IV). 1KW inverters with a X-fer switch use the 7″or 9″ (part # 7C, 9C) cage. 1KW, 2KW, and 3KW inverters without an X-fer switch use the 7″ or 9″ (part number 7B, 9B) cage assembly.

expandable system

MX Systems Monitor Card

It is now possible to monitor all of your remote power stations, anywhere, from a single location. You can have up-to-the-minute verification that all of your remote power systems are 100% operational. Your remote power system can tell you that it is currently running at 90% of its rated capacity.

An Exeltech System Monitor card is an upgrade option for any Exeltech MX Series Redundant or Upgradeable System equipped with an Alarm Card or New MX Systems with a Transfer Switch. This new product allows customers to monitor all important aspects of their power system from any IP based Ethernet network.

Customers can monitor all system alarm functions, including Power Module fail, Control Card Fail, Over-Temperature, Under DC Voltage, A-B Bus failure, System Breaker Open, and System Failure.

Additionally, customers can monitor battery voltage and current usage, and system output voltage and current. All alarm functions are viewable from an LCD display located on the System Monitor Card, and Ethernet connection, or a local Rs232 connection.

Main Menu Items

The main menu consists of nine different screens. To switch between each menu item press the MENU button. Alarm Details and System Settings have several addition screens available for viewing or changing system parameters, press the SELECT button to choose a parameter for viewing or a modification of settings. Hold the MENU button down to return to the main menu screens.

Operation

Normal operation of the Monitor Card is exactly the same as a standard Exeltech Alarm Card, with the notable exception of remote monitoring of system status. A blinking LED for the new alarm state announces new alarm states; pressing ether button stops the blinking, and Alarm Details will give a listing of any alarms that have activated. For a complete description of the Exeltech Alarm Card, see the Exeltech System Installation/Operation manual.

Remote Monitoring

Remote monitoring can be performed via DHCP enabled network, or RS 232 serial port. Monitoring software is included to allow remote sensing of alarm states, however, it is simple to implement custom software to meet any monitoring needs.

MX Power Inverter Systems Monitor

 

MX Solid State Transfer Switch

Features

  • Solid State
  • Zero Switching time
  • Modular Design
    • Single phase in 5, 10, 20KW
    • Split phase in 10, 20, 40KW
    • 3 Phase 15, 30, 60KW
    • SNMP Monitoring
      • AC Amps
      • AC Volts
      • DC Amps
      • DC Volts
      • Alarm Conditions
        • Load on alternate
        • Inverter alarms (if equipped)
        • Fast AC Failure Detection (< 2 ms)
        • Primary selection via front panel switch
        • Optional generator start

 

Operation

The Exeltech Solid State Transfer Switch sets a new standard in power density and alarm capabilities. Its modular design is available in 3 power levels: 5, 10 and 20KW, which can be linked together to provide single, split, and 3 phase systems. The Switches can communicate on a SNMP protocol via TCP/IP that provides data on AC volts and amps of both the primary and secondary sources. If linked to an MX inverter system, it will perform all the normal functions of the required alarm card plus communicate DC volts and amps—all inverter alarms including inverter fail, module fail, and over temperature. If the inverter is thus equipped, the switch will report both DC Bus A and Bus B Voltage. Additionally, the switch can report combined Major and Minor alarms via SNMP and form C contacts. The minor alarm is triggered with any alarm, the major alarm is only triggered with complete loss of AC Voltage to the load or when a complete loss is imminent.

All good to good transfers are synchronous and performed at zero crossing. The switch will operate on the user selectable primary source until the primary source fails or operates out of limits. It will switch to the secondary source in less than 4 ms, worst case. If the primary returns to normal limits, the switch will wait fifteen seconds for stabilization, monitor the primary and secondary source. Once assuring they are in phase, it will switch at the next available zero crossing.

The status of all available alarms, status, and measurements are available via a 2 X 8 LCD display. It is highly recommended that an Exeltech maintenance bypass switch be used in conjunction with this or any other solid state transfer switch. This switch can be used with Exeltech inverters or between any 2 AC Sources, whether they be inverters, generators, or utility sources.

 

XO SERIES INVERTERS

The XO system can be configured for power levels from 2 to 6KW with 120 VAC output, 240 VAC bi-phase or 208 VAC 3 phase. It is extremely compact and lightweight. Power modules weigh only twelve pounds each. Output voltage is precisely regulated, so that no measurable voltage change occurs on the output as input voltage fluctuates. With Distortion of 2% maximum, this inverter offers the cleanest sine wave power available.

EXELTECH manufactures some of the most reliable inverter systems available. Power levels are expandable, and modules can be added or replaced in the field. The XO system can be configured for power levels from 2 to 6KW with 120 VAC output, 240 VAC bi-phase or 208 VAC 3 phase.

The XO system is extremely compact and lightweight. Power modules weigh only twelve pounds each. Output voltage is precisely regulated, so that no measurable voltage change occurs on the output as input voltage fluctuates. Typically, less than 1.2 volt change in output voltage will occur when the output load varies from 0 to 100% of rated power.

With Distortion of 2% maximum, this inverter offers the cleanest sine wave power available. Models are available which cover 24, 48, and 66 VDC battery systems. Custom models can be designed to meet your specific input voltage requirements.

  • Expandable
  • True Sine Wave
  • 2000 Watt Modules
  • Extremely Lightweight
  • Compact
  • Micro Processor Controlled

Environmental Specifications