ELECTRICAL PANEL MANUFACTURER & ELECTRICAL CONTRACTORS
Panel Electro Original

Star Delta / DOL Starter Panel

Reliable Motor Starting Solutions for Industrial Applications

Panel Electro & Fire Automation manufactures heavy-duty Power Control Centre (PCC) panels up to 6300A. Built with 2.0mm CRCA steel framework, 99.9% electrolytic copper busbars, and Form 4b compartmentalization for maximum operating safety and uninterrupted power distribution.

Rated Current630A to 6300A
Short CircuitUp to 100kA / 1s
Segregation FormIP42 / IP54 / IP55
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Star Delta / DOL Starter Panel - Automation & Drives Panel View
Engineering Deep-Dive

Product Overview & Technical Architecture

What is Star Delta / DOL Starter Panel?

Panel Electro manufactures CPRI Type Tested Star Delta & Direct-On-Line (DOL) Motor Starter Panels engineered for high-performance motor starting, transient current reduction, and comprehensive electrical protection across industrial, commercial, and utility installations. Built with Tier-1 switchgear (ABB, Schneider Electric, Siemens, L&T, Legrand), heavy-duty electrolytic copper busbars, and precision timer relays, our starter panels deliver seamless operation for motors ranging from 1 HP up to 200 HP.

Capable of handling high continuous currents up to 6300A, a PCC panel houses heavy-duty Air Circuit Breakers (ACBs), Molded Case Circuit Breakers (MCCBs), high-capacity busbar chambers, numerical protection relays, and smart digital power quality meters.

Product Visual
Star Delta / DOL Starter Panel - Product Overview View
Switchgear Component Architecture

Internal Switchgear & Control Components Grid

Top-tier electrical switchgear, protection relays, and control electronics integrated inside Panel Electro MCC & PCC Panels.

Motor Starter (DOL/Star Delta)
Primary Motor Switching
MPCB Circuit Breaker
Short Circuit & Thermal Protection
Heavy Duty Contactor
High Endurance Switching
Electronic Overload Relay
Microprocessor Thermal Protection
Variable Frequency Drive (VFD)
Closed-Loop Speed Control
Soft Starter Unit
Stepless Voltage Ramp
Control Transformer
24V DC / 110V AC Power
Auxiliary Relays & Timers
Control Circuit Logic
Push Buttons & Selectors
Door Local Control
LED Indication Lamps
Status & Trip Indication
Multifunction Energy Meter
Class 0.2s RS485 Modbus
Current Transformers (CT)
Precision Current Sensing
Thermostat Exhaust Fan
Cabinet Ventilation
Canopy Door Light
Internal Cabinet LED
Heavy Terminal Blocks
Control & Power Wiring
Cross-Linked Ferruled Wiring
Numbered Wire Harness
Anti-Condensation Heater
Hygrometer Controlled
SCADA / IoT Gateway
Modbus / Ethernet Telemetry
Versatile Industry Deployment

Target Industrial, Commercial & Infrastructure Applications

Industrial Plants
Power Plants
Textile Industry
Chemical Industry
Food Processing
Pharmaceutical Plants
Commercial Buildings
Hospitals
Data Centers
Infrastructure Projects
Steel Plants
Automobile Industry
Water Treatment Plants
EPC Turnkey Projects
Engineering Excellence

Key Engineering Features & Design Highlights

Heavy Duty CRCA Steel Construction (2.0mm Frame)
Compact Space-Saving Modular Enclosure
High Conductivity Electrolytic Copper Busbars & Links
Top & Bottom Cable Gland Entry Provisions
MCB / MCCB Short Circuit Circuit Protection
Bimetallic / Electronic Thermal Overload Relay
Single Phasing & Phase Failure Protection Relay (SPPR)
Phase Sequence & Voltage Unbalance Protection
Door Mounted Start / Stop Heavy Duty Push Buttons
Auto / Manual Key Selector Switch Operation
Microprocessor Digital Star-Delta Transition Timer (0.1s - 30s)
Heavy Duty 3-Pole AC Contactors with Interlocks
Door Mounted Digital Ammeter & Voltmeter
Clear LED Indication Lamps (ON / OFF / TRIP / STAR / DELTA)
Potential-Free Dry Contacts for Remote Start/Stop & Trip Alarm
SCADA Ready RS485 Modbus Energy Meter Integration Option
PLC Compatible 24V DC Digital I/O Terminal Strip
IP42 Indoor / IP54 Dustproof / IP55 Weatherproof Ratings
Floor Mounted Base Channel Frame or Wall Mounted Cabinet
Neoprene Rubber Door Gasket & 7-Tank Powder Coating (RAL 7035)
Technical Specifications Matrix

Star Delta / DOL Starter Panel Parameters Table

IEC 61439 & IS/IEC 61439 Certified
Rated Operational Voltage:230V / 415V / 690V AC ± 10%, 3-Phase 4-Wire
System Frequency:50Hz / 60Hz ± 5%
Motor HP Rating Range:1 HP to 200 HP (0.75 kW to 150 kW Motors)
Rated Current (Amperage):6A, 10A, 16A, 32A, 63A, 100A, 160A, 250A, 400A
Busbar Material:99.9% Electrolytic ETP Grade Copper / EC Grade Aluminium
Electrical Protection Features:Short Circuit (MPCB/MCCB), Thermal Overload, Phase Failure, Single Phasing (SPPR), Earth Fault (Optional)
Enclosure Material:CRCA Powder Coated Steel / GI / Stainless Steel SS304 / SS316
Ingress Protection (IP Rating):IP42 / IP54 / IP55 / IP65 Weatherproof & Dustproof
Paint Finish & Enclosure Color:Pebble Grey RAL 7035 / Siemens Grey RAL 7032 Powder Coated (70-90 microns)
Mounting & Form Factor:Wall Mounted Control Cabinet / Floor Mounted ISMC Base Channel Frame
Control Circuit Power:230V AC / 110V AC / 24V DC with Dedicated Control Transformer
Operating Control Modes:Automatic Timer Transition & Manual Push-Button Override Mode
Contactor Switching Assembly:Heavy Duty 3-Pole AC Contactors (Main, Star, and Delta Assembly)
Star-Delta Transition Timer:Microprocessor Electronic Digital Timer Relay (0.1s to 30s Adjustable Delay)
Compliance Standards:IEC 61439-1 & 2, IEC 60947-4-1, IEC 60204-1, IEC 60529, IS/IEC 61439, IS 8623
* Custom busbar layouts, dual incoming provisions, and automatic bus couplers available upon request.
Switchgear Brands Integration

Supported Tier-1 Component Makes & Global Switchgear OEMs

Supplied switchgear configurations depend on customer specifications and project BOQ requirements.

ABB
Heavy Contactors & MPCBs
Schneider Electric
TeSys Contactors & Overload Relays
Siemens
SIRIUS Contactors & Motor Starters
L&T Electrical
Sub-KW to Heavy Duty Switchgear
Legrand
Protection MCBs & Relays
Fuji Electric
Compact Motor Contactors
Mitsubishi
AC Contactors & Thermal Relays
BCH Electric
Heavy Duty Industrial Starters
C&S Electric
Power Protection Gear
Lovato
Digital Timers & Overload Relays
Selectron
Single Phasing Preventers & Timers
Customer Approved Makes
Custom Project BOQ
Regulatory & Compliance Framework

Applicable Engineering Standards for Star Delta / DOL Starter Panel

Verified Compliance
IEC 61439-1 & 2

Low-Voltage Switchgear and Controlgear Assemblies

Mandates design verification, temperature rise limits, dielectric testing, short-circuit withstand, and internal arc protection.

Domain Scope:LT Power Control Centres (PCC), Motor Control Centres (MCC), APFC, and Distribution Boards
IEC 60947-1 to 7

Low-Voltage Switchgear and Controlgear Components

Governs performance standards for Circuit Breakers (ACB/MCCB/MCB), Contactors, Starters, Disconnectors, and Control Switches.

Domain Scope:All Breakers, Contactors, Soft Starters, and Motor Starters
IEC 60204-1

Safety of Machinery - Electrical Equipment of Machines

Regulates electrical safety, operator emergency stop circuits, earthing bonding, and automated machine drive panels.

Domain Scope:PLC Automation, VFD Drives, EOT Crane Controls, and Motor Control Desks
IEC 60529 / EN 60529

Degrees of Protection Provided by Enclosures (IP Code)

Defines ingress protection levels against solid objects, dust ingress, water jets, and weather exposure (IP42 to IP66).

Domain Scope:All Weatherproof Outdoor Feeder Pillars, Kiosks, and Industrial Enclosures
IS/IEC 61439

Applicable International / National Standard for Star Delta / DOL Starter Panel

Verified design compliance, structural rigidity, and electrical insulation protocol as mandated for Star Delta / DOL Starter Panel.

Domain Scope:Star Delta / DOL Starter Panel Manufacturing & Quality Protocol
IS 8623 / IS/IEC 61439

Indian Standard Specification for Factory Built Assemblies (FBA)

Indian national benchmark for low-voltage switchgear assemblies, busbar short circuit capacity, and mechanical strength.

Domain Scope:CPRI Type Tested LT Switchgear Panels manufactured in India
Modular Add-Ons

Optional PCC Panel Accessories & Sub-Assemblies

Bus Coupler Section with Mechanical & Electrical Interlock
Automatic APFC / Capacitor Bank Section for Power Factor Correction
Digital Dual-Source Energy Meter & Power Quality Analyzer
RS485 Modbus / Ethernet Communication Gateway
Class 0.2s Precision Current Transformers (CT) & Potential Transformers (PT)
Thermostat Controlled Space Heater with Hygrometer
Cabinet Internal LED Illumination Canopy Light
High-CFM Roof Exhaust Fan & Dust Filters
Door Safety Limit Switches & Interlocks
Quality Assurance Protocol

Factory Quality Inspection & Testing Protocols

01.Routine Test

100% factory verification of all electrical, mechanical, and control wiring parameters.

02.Factory Acceptance Test (FAT)

Customer witnessed live power, timer transition delay, and trip interlocking FAT.

03.Insulation Resistance Test

2.5kV HV dielectric isolation test (>1000 MΩ insulation resistance).

04.Functional Test

Auto/Manual transition check, contactor coil pickup/drop-out, and overload trip test.

05.Timer Transition Test

Precision digital timer calibration for Star-to-Delta changeover delay (0.1s to 30s).

06.Single Phasing Protection Test

Simulated single phase loss & voltage unbalance trip response check.

07.Visual Inspection

Powder coating thickness (70-90 µm), neoprene gasket sealing, and terminal labelling audit.

08.Torque Test

Calibrated torque wrench check of all copper busbar bolts and power terminals.

Industrial Inspection Views

Technical Inspection Gallery: Star Delta / DOL Starter Panel

Technical Specifications
Star Delta / DOL Starter Panel - Front View Elevation Photograph

1. Front View Elevation

Front view elevation photograph of Star Delta Motor Starter Panel with START/STOP push buttons and ammeter.

Front View • Angle 01 of 03

1. Front View Elevation

Front view elevation photograph of Star Delta Motor Starter Panel with START/STOP push buttons and ammeter.

RAL Color Standard:RAL 7035 Light Grey
Busbar Material:99.9% Electrolytic Copper
Switchgear Components:Tier-1 Black Housings (Siemens/L&T/ABB)
Wiring Finish:Ferruled Professional Wire Harness
Technical Documentation Library

Official Catalogues, Datasheets & Test Certificates

PDF Document Center
3.2 MB

Star Delta & DOL Starter Panel Official Catalogue

1.8 MB

Star Delta / DOL Starter Technical Datasheet

2.9 MB

Starter Panel General Arrangement (GA) Drawing & Schematic

2.1 MB

Control Wiring & Terminal Interconnection Diagram

4.1 MB

Installation, Operation & Maintenance Manual

1.5 MB

CPRI Routine Test & Type Test Inspection Report

Engineering FAQ Knowledgebase

15 Frequently Asked Technical Questions: Star Delta / DOL Starter Panel

15 Detailed Technical Answers
A Direct-On-Line (DOL) starter connects the motor windings directly to full mains supply voltage (415V), drawing high starting current (5 to 7 times Full Load Current). A Star-Delta starter initially connects motor windings in a 'Star' configuration (applying 1/√3 or ~58% of rated line voltage), reducing starting current and torque to ~33% of DOL values. After a pre-set time delay, the control timer automatically switches the motor windings into 'Delta' configuration for full power operation.

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INDIA KA APNA PANEL

PANEL ELECTRO is India's leading Electrical Panel Manufacturing Company specializing in Power Control Centres (PCC), Motor Control Centres (MCC), APFC Panels, PLC Automation, AMF, VFD Drives, Feeder Pillars, and Bus Ducts up to 6300A.

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