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LOW VOLTAGE SWITCHGEAR

Main Distribution Boards

An MDB is a panel or enclosure that houses the fuses, circuit breakers and ground leakage protection units where the electrical energy, which is used to distribute electrical power to numerous individual circuits or consumer points, is taken in from the transformer or an upstream panel.

Key features of Main Distribution Boards offered by PEM:

  • Fully type tested assemblies as per IEC 61439-1

  • Rated up to 6000A type tested panels for Blokset enclosure

  • Rated operating voltage up to 690V

  • Manufactured to Form 2, Form 3 & Form 4 construction

  • Type tested for 85kA/1 sec, 50kA/3 sec

  • Designed for both with drawable & fixed versions

  • Ample cabling space for easy connections

  • Top and bottom cable entry.

  • Panels for front or rear access to suit application

  • Index of protection : IP 31 & IP 54

  • Floor mounting

Sub Main Distribution Boards

The MDB then feeds SMDBs, which is installed generally at the point where a large distribution cable terminates and several smaller sub-circuits start. These are the switchboards that although similar construction, are larger than a final distribution board circuit. The boards are installed midway through the power distribution system, at the point in a large distribution cable ends, and several smaller starting sub-circuits.

  • Fully type tested assemblies as per IEC 61439-1

  • Rated operating voltage up to 690V

  • Manufactured to Form 2 & Form 4 construction

  • Type tested for 50kA/1 sec

  • Ample cabling space for easy connections

  • Top and bottom cable entry.

  • Panels for front or rear access to suit application

  • Index of protection : IP 31 & IP 54

  • wall mounting or free standing to suit application

Final Distribution Boards

The Sub-Main Distribution Boards feeds the Final Distribution Board, which then feeds electrical energy to the end user.

  • Compliant with IEC 61439-3

  • Current rating upto 250A

  • Index of protection : IP 41 & IP 55 as per IEC 60529

  • Available in Row type distribution, pan assembly (single or multi split arrangement) in flush or

    surface versions

  • Short circuit withstand : 17kA for 200ms

  • Adopted range to local regulations, quality makes and easy installation.

Motor Control Center Panels

Motor control centers are simply physical groupings of combination starters in one assembly. A combination starter is a single enclosure containing the motor starter, fuses or circuit breaker, and a device for disconnecting power. Other devices associated with the motor, such as pushbuttons and indicator lights may also be included.

Key features of Motor control centers offered by PEM:

  • Fully type tested assemblies as per IEC 61439-1

  • Rated upto 6000A

  • Rated operating voltage upto 690V

  • Manufactured to Form 2 & Form 4 construction

  • Type tested for 85kA/1 sec, 50kA/3 sec

  • Designed for both withdrawable & fixed versions

  • Tailored control using VFD, Soft starter & DOL

  • Ample cabling space for easy connections

  • Top and bottom cable entry.

  • Panels for front or rear access to suit application

  • Index of protection : IP 31 & IP 54

  • Floor mounting

Capacitor Banks

Improve the power factor by adding capacitive reactance in steps as per the power factor requirement. Power factor controller constantly monitors the load (and power factor) of the system on LV Panel and switch on/off the capacitor steps to maintain the system power factor to the set value.

Key features of Capacitor Banks offered by PEM:

  • type tested assemblies for busbars as per IEC 61439-1

  • Rated upto 700kVAR

  • Power factor correction by multi step design

  • Standard & detuned capacitor banks

  • Manufactured to Form 2 construction

  • Capacitors are Self healing, pressure sensitive disconnector & fitted with discharge resistors

  • Detuned reactor tuning order 2.7 (135 Hz), 3.8 (190 Hz) and 4.3 (215 Hz)

  • Microprocessor based power factor controller with various switching sequences

  • Special contactors for power factor correction capacitors; equipped with limiting resistance for

    the inrush current.

  • Easy installation & maintenance.

General Control & Synchronization Panels

Synchronizing panel will operate on an automatic mains failure system, so that when the main supply is interrupted on one or all phases (after an adjustable delay period) the generator sets will start-up together. After an initial warm-up period (adjustable) the generators will synchronize with each other by means of motorized circuit breakers or contactors onto a common busbar. Next, the motorized change- over switch will be closed and the load will be connected to the main distribution box.

  • 3-pole or 4-pole system as required

  • Various combinations of load transfer by ACBs, MCCBs or Contactors

  • Protection class up to IP 54

  • Load sharing/load shedding

  • Automatic and manual synchronizing

  • Factory built to client's specifications