Distribution switchboards including LV switchboard are critical to the reliability of the entire electrical system.
However, to ensure that its optimum function is being realized, we at PST, conform to certain specifications that regulate the design and the creation of LV switchboard assembly.
Main Function of LV Switchboard
It’s essential that the type of LV switchboard is wholly modified to meet its purpose and requirement of the electrical system. This is why, it is designed and constructed to conform the applicable electrical system and workplace guidelines.
Ultimately, PST offers LV switchboard that provides the following forms of protection:
- MCC panels fixed & drawout, single & double front with up to 200 feeders in a single panel have been built & supplied.
- Specialists in Intelligent MCC panels using Siemens, ABB, Allen Bradley, Schneider & Softhard intelligent relays.
- All reputed brands of switchgear like Siemens, Schneider, L&T, ABB & many others are offered in our panels.
- PCC panels upto 6300 Amp have been built & supplied.
- Semi intelligent MCC panels using Remote I/O stations for DCS / PLC.
- We offer fixed type & draw-out type of enclosure constructions with local fabrication, Elsteel enclosures & Rittal enclosures as per the clients’ needs.
- Well-engineered Busducts both indoor & outdoor types are offered. We have built busducts upto 6300 Amp.
- Panels are well engineered for trouble free lifelong operation, easy to maintain & as per IS norms. The panels supplied to global leaders are well appreciated by them.
- Documentation supplied with panels is of international standard.
Why are LV Switchboards Required?
LV switchboards are needed in the electrical systems for the following purposes:
- Safety of the human beings
- Protection of the electrical systems/machines
- Controlling different applications
- Measurement and controlling different electrical parameters
- Isolation of electrical system
- To enhance system-availability by allowing multiple sources to feed the loads
- Power distribution to electrical machines/systems
PCC Panel
Power Control Center (PCC) is used for control and distribution of various power sources used in the industry. Normally the Power Control Center or PCC is installed near the power source and that is why the fault level is often high.
The panels are designed to withstand fault levels of upto 80 KA for one second. The bus bar system in the PCC are designed to suit those fault levels as well as temperature rise upto 40°c above the ambient temperature. Ample space is also provided for all cable terminations. Various protections viz short circuit; overload, earth fault, under voltage etc are provided to protect the source and the equipment.
MCC Panel
Motor Control Center or MCC panels are suitable for operation of the motors with different ratings. Motor control center (MCC) contains different types of starting viz. Direct on line (DOL), Star-Delta, Soft starter, autotransformer etc.
Local and remote operation facility, and IMCC that is compatible to PLC/DCS based operation. Motor Control Center is properly ventilated in case of higher size of motor starter. Component layout is made so as to facilitate ease of operation and maintenance.
APFC Panel
Automatic Power Factor Control (APFC) Panel is specifically designed to maintain the power factor of the electrical plant that is close to unity. Automatic as well as manual modes are provided for power factor control (PFC).
Various types of capacitors are used depending on load conditions. Typically, APP, MPP or Mixed di-electric types of capacitors are brought into use. In case of the non-linear loads such as UPS, VFD, etc. thyristorised switching along with suitable filtering system is used to control the power factor.
AMF Panel
Automatic mains failure (AMF) panels, often referred to as automatic transfer switch (ATS) panels, enable the power switch to get to emergency standby generators in an event of significant loss of main power supply or total blackout.
Without the AMF panels, the generators would be required to be operated manually and that could lead to lost data, even potential damage to the electrical equipment, and also huge amounts of system disruption. AMF panels and ATS panels monitor the incoming AC-mains supply, it activates the standby generator when the mains power supply fails, and makes electrical transfer of the building’s load, automatically, from the mains to the generating set.When the mains power supply resumes, the AMF panels control the return to the mains power supply and also shuts down the power generator after completion of a suitable cooling period.
Bus Ducts
In electric power distribution, a bus duct is a sheet metal duct or a cast-resin insulator containing either aluminium or copper bus bars that is meant for the main purpose of conducting substantial current of electricity.
It’s an alternative means of conducting electricity to cable bus or power cables.