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At Penbro Kelnick we specialise in the manufacturing of various power electronics. All our products are manufactured according to high standards and specifications.

Penbro Kelnick - Power Electronics

Printed Circuit Boards (PCB) and Modules:

Penbro produces a very wide range of PCBs for their in-house manufacturing of power supplies and battery chargers etc. Standard components are used in the production of the PCBs, which ensures a replacement part being available in the future. A testing facility forms part of the production line. Every PCB is inspected and tested for functionality before being released.

Penbro Kelnick | Printed Circuit Boards (PCB) and Modules  

Power Supplies & Rectifiers:

A Power Supply is an electronic device that supplies an electrical load with electrical energy. Power supplies have a main function, which is to convert one form of electrical energy to another. Power supplies can also sometimes be referred to as electric power converters. There are many different types and sizes of power supplies and they can also be used in various devices.

At some remote railway signal and relay rooms there is no 230 volt ac mains supply available. The only source of power is the 3kV DC from the overhead line. The high voltage connection of this unit is mounted onto the 3kV mast which feeds the low voltage section installed in the signal room where 24VDC is generated.

Penbro manufactures Rectifiers for various applications such as DC power supplies, battery chargers, transformers, cathodic protection, plating rectifiers, modular 19″ rack-mount units and mobile power supplies/battery chargers. All of the rectifiers include constant voltage and current control and optional alarm features.

Power Supplies & Rectifiers | Penbro Kelnick   Download our Power Supplies & Rectifiers Catalogue Here

Penbro Kelnick | Power Supplies

Battery Chargers:

We manufacture battery chargers according to customer specifications. These include chargers for lead-acid (vented or sealed) and NiCad batteries with capacities of a few amp-hours up to a few hundred amp-hours. The output voltages of our battery chargers range from 6VDC to 300VDC.

In addition to these products, Penbro also offers the service of a specialist crew for on- site battery installations and maintenance.

Battery Chargers | Penbro Kelnick   Download our Battery Chargers Catalogue Here

Penbro Kelnick | Battery Chargers

Modular Power Racks:

Penbro offers a wide range of 19-inch rack rectifier modules and enclosures. A 19-inch system provides redundancy and is therefore very popular for the supply of power to a critical load i.e. a system with two or more rectifiers operating in parallel would still provide power to the load in the event of a failure of one of the rectifiers. The faulty rectifier may be repaired and re-inserted into the rack without disrupting the supply of power to the load. Each unit includes alarm outputs via a DB9 connector.

Penbro Kelnick | Modular Power Racks

Plating Rectifiers:

Penbro manufactures plating rectifiers with output power ratings that range from as little as 100 watt for light duty applications and up to 200 kilowatt for large volume plating.

Plating rectifiers are usually manufactured in accordance to customer specifications. Due to the hazardous chemical environments in which the rectifiers normally operate, additional precautions are taken into account when manufacturing the enclosure and control circuitry.

Penbro Kelnick | Plating Rectifiers

Cathodic Protection:

Penbro Kelnick manufacture rectifiers to protect pipelines from corrosion. A buried pipeline is subjected to an induced electrical current due to a difference in voltage potential between the soil and pipe. A pipeline which has no cathodic protection will eventually corrode and undoubtedly require replacement in the future.

The most common method of implementing cathodic protection is by inducing an electrical current between the pipeline and a sacrificial anode which is buried in the ground above the pipeline. This creates a dielectric effect and the buried anode is consumed instead of the pipeline. The replacement of the anode is significantly less costly than the replacement of a pipeline.

Penbro Kelnick | Cathodic Protection


The Penbro PWM industrial inverter is one of the main reasons why we are currently the preferred South African supplier of power equipment to the railway signals sector.

Our inverters are manufactured according to the specification requirements of CSE45D, SABS0142 and ISO9001:2008.

Penbro Kelnick | Inverters

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