Star Delta Starter

The Star Delta Starter (PSS-SDS) is a robust, efficient motor starter for three-phase squirrel-cage induction motors. It is designed to reduce the high inrush current during motor starting by initially connecting the motor windings in a star configuration and later switching them to a delta configuration for normal running operation.

This starter provides motor protection, operational reliability, and energy efficiency, making it ideal for industrial and commercial applications with medium- to large-horsepower motors.

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Description Technical Sheet

Product Description

1. GENERAL DATA

Parameter	Details
Manufacturer	Palladium Safety Solutions Pvt. Ltd.
Trade Mark/Brand	"PALEX"
Type	Electrical Panel – Star Delta Starter
Model No.	PSS-SDS

2. TECHNICAL SPECIFICATIONS

Parameter	Details
Input Supply Voltage	440V AC ±10%, 50 Hz, 3-phase
Control Supply Voltage	230V AC (Optional: 110V AC / 24V AC)
Motor Power Range	Suitable for 10HP – 75HP motors
Rated Current Capacity	20A to 120A (depending on motor rating)
Starting Method	Star-to-Delta transition (with adjustable timer, 5–30 sec typical range)
Protection Devices	Thermal overload relay (adjustable), MCB/MCCB short-circuit breaker
Switchgear Components	Main Contactor, Star Contactor, Delta Contactor, Timer
Indications	Phase (R, Y, B) lamps, ON lamp
User Controls	Start push button (Green), Stop push button (Red), Reset button
Construction Material	16 SWG CRCA steel, epoxy/polyester powder-coated
Ingress Protection (IP)	IP42
Cooling Method	Natural air-cooled
Dimensions (H × W × D)	450×450×250 mm
Weight	13 kg
Colour	Standard Red
Mounting	Wall-mounted

3. ELECTRICAL CHARACTERISTICS

Dielectric Strength: 2.5 kV for 1 minute between live parts and earth.
Insulation Resistance: >100 M– at 500 V DC megger test.
Short-Circuit Withstand: Up to 10 kA (depending on protective device selection).
Power Loss (Contactors): – 3W per pole at rated current.
Transition Time (Star to Delta): Adjustable (factory set at 10 sec, user adjustable 5–30 sec).

4. MECHANICAL CHARACTERISTICS

Enclosure Material: Cold Rolled Close Annealed (CRCA) steel
Sheet Thickness: 16 SWG (1.6 mm)
Surface Treatment: Seven-Tank phosphating process with powder coating for corrosion resistance
Operating Temperature Range: -10°C to +55°C
Storage Temperature Range: -20°C to 70°C
Relative Humidity: Up to 95% RH, non-condensing
Mounting Arrangement: Wall-mounted with robust brackets
Cable Entry: Gland plate provided at bottom/top with knockouts

5. FEATURES

Operates on 440 V AC, 50 Hz three-phase supply
Indications: R (Red), Y (Yellow), B (Blue) phase lamps and ON indication
Protection: Integrated overload relay and short-circuit breaker (MCB/MCCB)
Operation Mode: Fully automatic (with timer-controlled transition) and manual (selector switch)
User Interface: Push buttons for Start, Stop, and Reset
Construction: Rugged 16 SWG CRCA sheet steel enclosure with powder coating
Installation: Wall-mounted with pre-drilled mounting holes
Performance: High efficiency, long service life, and easy maintenance