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Insights & Tips Archive


Majortel Temperature Compensation Knowledge Bank

What is the "temp-comp" feature all about in a dc power system? The 2V cells in the big battery stacks require 3mV/cell/t° by manufacturing standards. Therefore, 0.003V per cell change (up/down) by the charging system in response to each degree variation. The calculated voltage factor is programmed into a rectifier/charging system. The factor must be adjusted to match the battery type, size and nominal voltage operation. The most common factors are listed below as examples. By Formula ...


December 01, 2018 | Technical Info, | read more...

Majorsine Accessory Products for Inverters

Majorsine-SNMP Communication Card Remote monitoring is a prime consideration and requirement to manage multiple network elements from a central location. Each inverter is manufactured with a port slot to support the card installation in the field, at the time of service commissioning. TCP/IP access is established by simply installing the plug-n-play card, configuring your network IP address and attaching the network interface cable. Navigate to the assigned address to review the various web sc...


October 01, 2018 | Product News, Technical Info, | read more...

Fuse Distribution in a Majortel Power System

Majortel 48Vdc Power System: MTS48/30FL-1U This power system is designed with the integrated GMT load fuse distribution bay, front access visual indication when a fuse is open.  The battery circuit breaker, integrated for maintenance convenience, is located on the front, next to the fuse distribution.  The circuit breaker separates the battery connection from the core rectifier and load bus when open.  The circuit breaker operates independently from the low voltage disconnect (LVD) that is p...


August 02, 2018 | Product News, Technical Info, | read more...

Dual-Power Feature in a DC-DC Converter

Load A/B Dual-Power Circuits – Majortel Converter Systems This power system is designed with the integrated Load A/B dual-power circuits with individual breakers and front access visual indication as a part of the label text on the breaker case. The design incorporates actuator guard barriers to aid in the prevention of unintentional actuator movement. The dual-power block terminal, for secured screw connection, is located on the system backside. This simple bulk configuration provides indepe...


June 02, 2018 | Product News, Technical Info, | read more...

130 Volt Compact Power

Two (2) Pole Disconnect Circuit Breaker in Majortel 130 VDC system This 130 volt power system is designed with the integrated output circuit-breaker 2-Pole interrupt, front access operation. The two pole power block for secured screw connections is located on the system backside. The 130V circuit breaker separates both the positive and negative circuits between the compact power system output connection and rectifier bus.  Due to various 130V applications, the circuit breaker is labeled “loa...


April 05, 2018 | Product News, Technical Info, | read more...

What Do I Need? Using Simple Terms

Need Analysis: The Triad of Power Application Selection! These are the three key items one will need to know before selecting a power product. We call this the "triad" in power. There is something going IN, something going OUT and how MUCH of the something in all systems. A system designer can evaluate a detailed wish list of parameters, once each point in the triad is defined. Consider the following: Voltage Input: This is a number and type. Examples like 240Vac or 130Vdc Voltage...


February 15, 2018 | Technical Info, | read more...

Majortel Distribution Breaker - Technical Bulletin

Technical Bulletin TB-018 for Majortel Power System Breaker Distribution Circuit Breakers Insertion Procedure 1.  When inserting the distribution circuit breaker into the respective terminals, both spades may not fully seat in the female terminals and the auxiliary alarm spades are at high risk of being bent and/or broken during insertion. In some cases, this lack of attention to detail at application prep has caused auxiliary alarm terminals to break and voltage terminals to bend. ...


November 01, 2017 | Technical Info, | read more...

Majortel Converter 250V dc Operations

MTD Converter*: 250 Volt Operation Scope: Application for a Utility Service Provider that will deploy the Majortel DC-to-DC converter in a 250V dc nominal power, substation environment. This procedure is intended to be performed by qualified personnel familiar with general dc electrical system knowledge and maintenance protocols. Multiple 130V to 24 and 130V to 48 converters are deployed across the nation, this is one of a select few that operate with a higher voltage bus.  #SmartGrid #Grid M...


September 01, 2017 | Technical Info, | read more...

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...