Star-Delta Motor Starter 45–75 kW | Intelligent Integrated Reduced-Voltage Starter (YCQD7)

Sizing a motor starter? Match the starter to the motor's kW and starting profile — the selection guide below is your starting point, but always confirm on site.

Industrial buyers in Pakistan choose the CNC YCQD7 intelligent integrated star-delta starter when they need to start a large three-phase motor without hammering the supply with a full direct-on-line inrush. It packs the main, star and delta contactors, an intelligent controller and the auxiliary contacts into one compact module — the smooth star-to-delta start that used to need three separate contactors plus a timer, now factory-integrated. This listing is the Z (multifunctional) type, which adds a full motor-protection suite and an on-board display.

Quick Specs

Downloads

Full technical documentation from CNC Electric:

• 📄 User Manual / Instructions (PDF) — wiring, star-time and protection setup, terminal layout.
• 📘 Specification Sheet / Sample Book (PDF) — full ratings table, model matrix, dimensions.
• 📐 3D Drawings (ZIP) — for panel layout and CAD.

What This Product Does

A big squirrel-cage motor started direct-on-line pulls 6–8× its rated current for the first few seconds. On a Pakistani supply — especially on a genset or a weak rural feeder — that inrush trips breakers, dips the voltage for everything else, and stresses the motor windings and couplings. A star-delta starter cuts that starting current to roughly one-third by first connecting the motor windings in star (each winding sees only 58% of line voltage), then switching to delta for full-voltage running once the motor is up to speed.

The YCQD7 does this automatically: energise the 220 V control coil and the intelligent controller closes the main + star contactors for the reduced-voltage start, waits out the adjustable star time, then drops the main contactor and re-closes with the delta contactor for normal running. On the Z version, the controller also watches the motor continuously and trips on overload, locked rotor, phase loss, three-phase imbalance, and over/under-voltage — showing the fault on its display so your operator knows why it stopped.

Where It Fits Best in Pakistan

This starter is relevant for buyers in Lahore, Karachi, Islamabad, Rawalpindi, Faisalabad, Gujranwala and Peshawar running larger motor loads — flour and feed mills, water and irrigation pumps, compressors, crushers, blowers and industrial fans. Anywhere a 40–120 HP motor is started against the line, a star-delta starter protects both the supply and the motor. Pair it with an upstream MCCB for short-circuit protection and, where the motor is remote, a local isolator switch for safe maintenance.

Selection Guide

Sizing must match the motor nameplate current and its starting profile — confirm on site with your electrician before ordering.

How to Install

• Installation must be done by a licensed electrician or qualified panel technician.
• Fit an upstream short-circuit device (fuse NH1-125 or an MCCB) — the starter does not include short-circuit protection.
• Bring the six motor leads out (both ends of all three windings) to the starter's motor terminals — star-delta needs all six.
• Feed the 220 V control voltage to the coil terminals; set the star run-time and protection thresholds on the display.
• Confirm rotation, then test the star→delta changeover on no load before committing the drive.

What This Product Does NOT Do

A star-delta starter softens the start only — it does not give variable running speed (for that you need a VFD). It has no built-in short-circuit protection, so it always needs an upstream fuse or MCCB, and it is not an isolator — add a separate disconnect for safe maintenance. The star-to-delta transition is a step change, so there is a brief torque dip at changeover; for a completely smooth ramp choose an electronic soft starter.

Star-Delta vs Soft Starter vs VFD

CNC vs Schneider vs Local Assembly

Cross-Category Recommendations

If you're buying this starter, also consider an upstream MCCB for short-circuit protection, a local isolator switch at the motor, and a DIN power supply for control voltage. For speed-controlled loads see our VFD range; for a smoother start see our soft starters.

FAQs