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Insights & Tips Archive


Majortel DC/DC Converter Circuit

Majortel Converter Circuit User Question:  What does the converter circuit look like in a drawing and explain how the load equipment connects to one or two power conversion modules using the MTD48/25-130-1U or MTD48/50-130-1U converter system? Insight's Answer: The Majortel converter system includes a simple Load 1 and Load 2 breaker distribution. The output is designed to support multiple isolated output circuit configurations. [caption id="attachment_975" align="alignleft" width="30...


April 15, 2017 | Technical Info, | read more...

Majortel DC Power System Capacity Decision

Majortel DC Power System Capacity Chart Majorpower develops dc power solutions for deployment ranging from 500W to just over 5000W.  The second most common dc power system specification parameter is capacity required to operate an application and/or specific load(s).  Generally, this capacity is estimated in either dc amps or watts.  Watts are calculated by the product of required, maximum sustained dc amps times the nominal input dc voltage. It is paramount to consider that the capacity ...


January 06, 2017 | Technical Info, | read more...

Majortel DC Power System Voltage Decision

Majortel DC Power Voltage; Which System? Here at Majorpower we understand that choosing a DC Power System for your critical application requires careful consideration and planning.  In order to make that decision, for dc power voltage, a bit less stressful; we listened to your concerns and challenges and then put our collective heads together to present four charts that will serve as a reference tool to choose the quality product for your project. In the next few months we will be releasin...


November 24, 2016 | Technical Info, | read more...

Majortel Alarm Relay Programming - Basics 101

Users Can Select Form-C 101 Basic Terms; Normal Relay Settings Define: Form-C Relay A single pole double throw (SPDT) relay is used to actuate the alarm status condition.   The relay can switch one circuit (SP) and be placed in 1-of-2 positions (DT). The relay's "resting state" is the closed position; when no power is applied to the installed system controller. (MTS-Com) Define: Dry-Contact Term and use as Alarm Relays. The Majortel (MTS) relay contact surfaces do not contribute ...


August 22, 2016 | Technical Info, | read more...

Majorsine Inverter Power Reset

Reset Instructions: 1.   Tools Required: Majorsine installation and operation manual Digital Multimeter 2.   Safety: All wiring devices should be installed and used in accordance with applicable listings, ratings, and codes. Use only copper wire with this device. Do not tin conductors. Failure to wire as instructed may cause damage to connected equipment or personal injury. This device is to be installed or checked by a certified electrician or qualified person only. ...


May 23, 2016 | Technical Info, | read more...

Majorsine Bypass Alarm; Programmable Option

Start-up programming: Bypass Alarm Configuration for Operation without Integrated Bypass. The Majorsine family of power inverters allows bypass alarm configuration. End users can disable the bypass alarm and AC input bypass fault LED whenever the integrated bypass circuit is not being used for alternative power. The following steps should be initiated within 10 seconds of initial "soft-start" of the inverter or it will need to be hard-reset again. 1. Hard reset the inverter by remov...


March 01, 2016 | Technical Info, | read more...

C-Rate Charge Programming

Battery Circuit Charge Parameter: C-Rate C-Rate factor calculations for charging or discharging the battery. (Reference the application chart.) Battery manufacturers will use different Cxx rates depending on the market or application at which their batteries are targeted. Typical rates used are C8 in UPS, C10 in telecommunication and C20.  The most common C10 factor settings are 10% recharge based on the capacity of the battery as programmed using AHr ratings.  The default setting 0.100C10...


October 12, 2015 | Technical Info, | read more...

Majortel AC Mains Supplement

The Majortel 2U power system has the capability to accept AC mains input using a single or double power source. Applicable product numbers include: MTS48/50AT-2U, MTS48/75AT-2U, MTS48/100AT-2U If using a single AC main input source to supply power to all four rectifiers, the buss work (shown as B1 and B2 in the referenced illustration) should remain intact. One set of terminals would only be required using L1, L2 and PE (Earthed ground). It is also noted that this power shelf accepts si...


July 06, 2015 | Technical Info, | read more...

Warm Weather Battery Charging

Temperature Compensation When the temperature probe is connected to the Majortel DC rectifier system, the controller will perform voltage control based on air temperature around the probe for effective battery charging. The insulated probe should be installed on or near the battery post for best results and accurate temperature compensation operation.  If the probe is not connected to the power system this battery charger feature will not operate.  Temperature compensation has an invers...


June 09, 2015 | Technical Info, | read more...

Majortel DC Circuit Protection Decision

Majortel DC Power System Circuit Protection Decision DC circuit protection is the last step in the power flow of a integrated rectifier system.  The application designer can make several choices based on load ampere ratings and method of circuit interruption. Standard GMT fuses (telecom rated) can be placed in the MTS48/30FL-1U system output distribution bay.  The maximum output rating allowed is 15A, per fuse slot.  The front accessible location facilitates visible failed fuse indicators...


May 15, 2015 | Technical Info, | read more...