R. K. Automation

In line with clients'' diverse requirements, we are engaged in offering an optimum quality range of VFD Control Panel.

Sometimes your work space is dusty, dirty, wet, humid, corrosive, or hot. In those harsh environments, you cannot just mount your VFD exposed. You need a VFD Control panel – an enclosure that protects the VFD and other electric components.
What is a VFD control panel used for:

Keeping all components in one panel

Keeping dust, dirt, and weather out of electrical parts

A complete motor control solution (bypass, harmonic filtering, etc.)

What is typically inside a VFD control panel?

There are many components you can put inside a VFD control panel. Here are some examples of what you might find:

VFD – The main component of the motor control panel. The VFD inside will vary in voltage, horsepower, full load amps (FLA), and other specifications. Sometimes you may find redundant VFDs installed in case of a VFD failure.

Line reactors – 3% or 5% to reduce harmonic distortion

Harmonic filters – A more effective way to reduce harmonic distortion

Circuit breaker – Protects the electrical circuit from overload or short circuit

Bypass – keeps the system running even if the VFD fails

PLC – Programmable Logic Controller – for more advanced operations

Modem – For communication purpose

AC or other cooling units – keeps the panel at a certain temperature depending on surrounding environment

Soft-starter – Starts motor slowly but without speed control

Surge protector – Protects the system from voltage spikes

Multiple motor overloads – an option for powering multiple motors off one VFD, typically used on fan walls

Anti-condensation heater (available in NEMA 3R panels) – eliminates the buildup of dew inside the VFD panel

Motor starters – For running motors across the line

Being an eminent organization in the industry, we are involved in providing a premium quality range of APFC Panel.
AC power flow has two components:
Real power or active power (P), expressed in watts (W)
Reactive power (Q), usually expressed in reactive volt-amperes (var)
These are combined to the complex power (S) expressed volt-amperes (VA).
The magnitude of the complex power is the apparent power (|S|), also expressed in volt-amperes (VA).

The VA and var are non-SI units mathematically identical to the watt, but are used in engineering practice instead of the watt in order to state what quantity is being expressed. The SI explicitly disallows using units for this purpose or as the only source of information about a physical quantity as used.
The power factor is defined as the ratio of real power to apparent power. As power is transferred along a transmission line, it does not consist purely of real power that can do work once transferred to the load, but rather consists of a combination of real and reactive power, called apparent power. The power factor describes the amount of real power transmitted along a transmission line relative to the total apparent power flowing in the line.
Power Triangle:
One can relate the various components of AC power by using the power triangle.
Real power extends horizontally in the î direction as it represents a purely real component of AC power.
Reactive power extends in the direction of ĵ as it represents a purely imaginary component of AC power.
Complex power (and its magnitude, Apparent power) represents a combination of both real and reactive power, and therefore can be calculated by using the vector sum of these two components.
We can conclude that the mathematical relationship between these components.

Increasing the power factor:
As the power factor (i.e. cos θ) increases, the ratio of real power to apparent power (which = cos θ), increases and approaches unity (1), while the angle θ decreases and the reactive power decreases.
[As cos θ → 1, its maximum possible value, θ → 0 and so Q → 0, as the load becomes less reactive and more purely resistive].

Decreasing the power factor:
As the power factor decreases, the ratio of real power to apparent power also decreases, as the angle θ increases and reactive power increases.

• A motor control center (MCC) is an assembly of one or more enclosed sections having a common power bus and principally containing motor control units. Motor control centers are in modern practice a factory assembly of several motor starters. A motor control center can include variable frequency drives, programmable controllers, and metering and may also be the electrical service entrance for the building.

• Motor control centers are usually used for low voltage three-phase alternating current motors from 208 V to 600 V. Medium-voltage motor control centers are made for large motors running at 2300 V to around 15000 V, using vacuum contactors for switching and with separate compartments for power switching and control.

• Motor control centers have been used since 1950 by the automobile manufacturing industry which used large numbers of electric motors. Today they are used in many industrial and commercial applications. Where very dusty or corrosive processes are used, the motor control center may be installed in a separate air-conditioned room, but often an MCC will be on the factory floor adjacent to the machinery controlled.

• A motor control center consists of one or more vertical metal cabinet sections with power bus and provision for plug-in mounting of individual motor controllers. Very large controllers may be bolted in place but smaller controllers can be unplugged from the cabinet for testing or maintenance. Each motor controller contains a contractor or a solid-state motor controller, overload relays to protect the motor, fuses or a circuit breaker to provide short-circuit protection, and a disconnecting switch to isolate the motor circuit. Three-phase power enters each controller through separable connectors. The motor is wired to terminals in the controller. Motor control centers provide wire ways for field control and power cables.

• Each motor controller in an MCC can be specified with a range of options such as separate control transformers, pilot lamps, control switches, extra control terminal blocks, various types of thermal or solid-state overload protection relays, or various classes of power fuses or types of circuit breakers. A motor control center can either be supplied ready for the customer to connect all field wiring, or can be an engineered assembly with internal control and interlocking wiring to a central control terminal panel board or programmable controller.

• Motor control centers usually sit on floors, which are often required to have a fire-resistance rating. Firestops may be required for cables that penetrate fire-rated floors and walls.

We are a unique entity in this industry, actively committed towards offering a premium quality range of AMF Panel.

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• On the removable connector JC you are required to connect the relays. The Bek3 provides a common supply rail (JC8).
• It is about a dc supply suited for automotive relays that includes over voltage protection, short circuit protection and EMI protection.
• You are required to use 90-200 OHM dc coil relays (12 V or 24V according to your engine battery).

• To a removable connectors JP and JL you will connect the CURRENT TRANSFORMERS suited for the current monitoring of the EARTH FAULT and 3-PHASE GENERATOR.
• A /5 transformers are required in the range 50 up to 9900Amps.
• The JA removable plug is used to monitor the Mains & Generator voltage / frequency in the range 80-600V and 20-99HZ.
• The version BeK3-400Hz is normally available for Aircraft Ground Support equipment.

We are ranked amongst the trusted firms engaged in providing a wide range of Relay Control Panel.

Other Specifications:

• A programmable logic controller (PLC), or programmable controller is an industrial digital computer which has been ruggedisedand adapted for the control of manufacturing processes, such as assembly lines, or robotic devices, or any activity that requires high reliability control and ease of programming and process fault diagnosis.
• They were first developed in the automobile industry to provide flexible, ruggedised and easily programmable controllers to replace hard-wired relays and timers. Since then they have been widely adopted as high-reliability automation controllers suitable for harsh environments.
• A PLC is an example of a “hard” real-time system since output results must be produced in response to input conditions within a limited time, otherwise unintended operation will result.
• PLCs can range from small “building brick” devices with tens of inputs and outputs (I/O), in a housing integral with the processor, to large rack-mounted modular devices with a count of thousands of I/O, and which are often networked to other PLC and SCADA systems.
• They can be designed for multiple arrangements of digital and analog I/O, extended temperature ranges, immunity to electrical noise, and resistance to vibration and impact. Programs to control machine operation are typically stored in battery-backed-up or non-volatile memory.
• It was from the automotive industry in the USA that the PLC was born.
• Before the PLC, control, sequencing, and safety interlock logic for manufacturing automobiles was mainly composed of relays, cam timers, drum sequencers, and dedicated closed-loop controllers. Since these could number in the hundreds or even thousands, the process for updating such facilities for the yearly model change-over was very time consuming and expensive, as electricians needed to individually rewire the relays to change their operational characteristics.
• When digital computers became available, being general-purpose programmable devices, they were soon applied to control sequential and combinatorial logic in industrial processes. However these early computers required specialist programmers and stringent operating environmental control for temperature, cleanliness, and power quality.
• To meet these challenges the PLC was developed with several key attributes.
• It would tolerate the shop-floor environment, it would support discrete (bit-form) input and output in an easily extensible manner, it would not require years of training to use, and it would permit its operation to be monitored.
• Since many industrial processes have timescales easily addressed by millisecond response times, modern (fast, small, reliable) electronics greatly facilitate building reliable controllers, and performance could be traded off for reliability.

• Power Control Center is considered to be the heart of an electrical system in any industry. Therefore it shall offer users long term reliability, safety, low maintenance & testing time.
• Siemens 8PU efficiently meets these requirements with 8PUL4.5/T3.5 Power Control Centers.
• 8PU L4/ T3 family of PCCs are compartmentalized, switchboard panels housing state-of-the-art Siemens make ‘Drawout ACBs’, ‘MCCBs’ and ‘Switch Disconnector Fuse’.

• Type tested assemblies offering highest reliability.
• Test and disconnected position with door closed for safety.
• For every rated current range, optimum connection conditions for cables and busbars.
• Separate function compartments consisting of a switching device, auxiliary equipment and a cable connection compartment for safety.

• Free choice of the supply direction without any sacrifices in terms of technical specifications.
• High short-time current carrying capacity for time-graded short-circuit protection (up to 500ms) assures reliable operation of the switchboard without being affected by short-circuit.
• Indication & operation in the door closed condition.
• Enhanced communication system