Isolator Switch
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AC Isolator 4 Pole 250A-1000A | Industrial
- Rs.12,000
Rs.17,000- Rs.12,000
- Unit price
- per
AC isolator switch 4 pole is the correct choice when you need safe manual isolation of a higher-current circuit in Pakistan, not automatic transfer and not protective tripping. On the live CNC Electric Pakistan page, this YCHGL listing starts at Rs.15,000 for 250A and...- Rs.12,000
Rs.17,000- Rs.12,000
- Unit price
- per
Updated: June 2026 · CNC Electric Pakistan
Isolator Switch — Pakistan Quick Answer (May 2026)
An isolator switch in Pakistan is a manually-operated mechanical switch used to safely disconnect a circuit from its power source for maintenance, repair, or emergency stop. Unlike a circuit breaker (which trips on fault), an isolator's only job is providing a visible, lockable break in the circuit — a safety requirement before any electrical work. CNC 2026 prices range from Rs. 850 (3P 32A panel-mount) for small motor branches to Rs. 18,500 (4P 630A enclosed) for industrial mains.
| Application | Recommended Isolator | CNC Model | 2026 PKR |
|---|---|---|---|
| Small motor branch (5-15 HP) | 3P 32A load-break | YCHGL 3P 32A | 850 |
| Sub-main isolation 3-phase | 4P 63A enclosed | YCHGL 4P 63A | 1,800 |
| Larger motor or panel main | 4P 100A load-break | YCHGL 4P 100A | 2,800 |
| Factory sub-main | 4P 250A panel/door | YCHGL 4P 250A | 6,800 |
| Industrial main (200-400A) | 4P 400A enclosed lockable | YCHGL 4P 400A | 11,500 |
| Heavy industrial / generator | 4P 630A enclosed | YCHGL 4P 630A | 18,500 |
Quick decision: Isolator amp rating = circuit amp rating (no upsize/downsize needed since isolators don't trip). For maintenance safety, always specify lockable version (padlock provision) — required by law for any installation where workers will service downstream equipment.
Read also: DC Isolators (for solar) · Fuse Switch Disconnector (isolator + fuse combined)
Isolator vs Circuit Breaker — They're NOT the Same
| Factor | Isolator | Circuit Breaker |
|---|---|---|
| Operates on fault? | No (manual only) | Yes (trips automatically) |
| Designed to break load? | Load-break isolators yes, no-load isolators NO | Always yes |
| Visible break gap | Required (for safe maintenance) | Not required (mechanical reset only) |
| Lockable? | Yes (padlock hole standard) | Optional accessory |
| Primary use | Maintenance isolation, lock-out / tag-out (LOTO) | Fault protection during normal operation |
Load-Break vs No-Load Isolator
- Load-break isolator: can be operated WHILE current is flowing (under load). Most modern industrial isolators are load-break. Mark "AC-23" or similar.
- No-load (off-load) isolator: can only be operated when the circuit is already de-energized by another device (e.g., upstream breaker is open). Cheaper but dangerous if mis-used. Mostly legacy.
For Pakistani installations, always specify load-break (AC-23) isolators. No-load type should only be used with explicit interlock to ensure upstream is open first.
Isolator FAQ — Pakistan
Q1: What is an isolator switch and when do I need one?
An isolator provides a manual, visible, lockable disconnection of a circuit. Required by Pakistani electrical code at: (1) each motor for maintenance safety, (2) each sub-main DB for isolation during work, (3) each generator output for changeover safety, (4) any equipment where workers will perform service.
Q2: Price of isolator in Pakistan?
CNC isolator prices in 2026 start at Rs. 850 for 3P 32A (small motor) up to Rs. 18,500 for 4P 630A enclosed (industrial main). Most-bought size for 3-phase factory sub-main is 4P 100A at Rs. 2,800.
Q3: Can I use a circuit breaker as an isolator?
Technically yes if it has "isolation rated" marking, but not recommended. Dedicated isolators are cheaper, have visible break indication, and are designed for the daily lock-out/tag-out cycle that maintenance work requires. Use breaker for protection, isolator for isolation.
Q4: 3-pole or 4-pole isolator?
For 3-phase circuits without isolating neutral: 3-pole (3 lives). For 3-phase with neutral isolation (Pakistani TN-S systems, generator changeovers): 4-pole (3 lives + neutral). Most safety codes require 4-pole for any installation where workers might come in contact with the neutral.
Q5: What's the difference between isolator and switch-disconnector?
Same device, different terminology. "Isolator" emphasises safety (visible break for maintenance). "Switch-disconnector" emphasises function (can both switch under load AND provide isolation). Modern IEC standards prefer "switch-disconnector."
Q6: Is CNC isolator PSQCA certified?
Yes. CNC YCHGL series isolators carry IEC 60947-3 compliance and PSQCA approval. AC-23B utilisation category (rated for inductive load switching).
The CNC YCHGL‑633150A Isolator Switch is a high‑performance electrical isolation device designed for reliable circuit disconnection and load‑safe operation in industrial, commercial, and residential installations. This IEC60947‑3 compliant isolation switch delivers robust switching performance, ensuring power safety, operational stability, and long‑lasting functionality in demanding electrical systems.
Key Features & Benefits:
Reliable Power Isolation:
Designed to safely break and make electrical circuits, the CNC isolator switch provides a visible and secure disconnection, preventing accidental energization during maintenance or system servicing.
Wide Current & Voltage Ratings:
This isolator supports a broad range of rated currents (from 63A up to 3200A) and rated insulation voltages, making it ideal for versatile applications in power distribution boards, control panels, and industrial automation systems.
Built‑for Safety & Compliance:
Manufactured according to international safety standards (IEC60947‑3), the CNC YCHGL‑633150A enhances electrical operator safety, reduces arc risks, and ensures stable operation in both low voltage and heavy‑load environments.
Durable Construction:
With a rugged mechanical and electrical design, this isolator switch withstands challenging conditions, providing superior reliability and extended service life.
Suitable Operating Environment:
Engineered for normal installation conditions with ambient temperatures from ‑5 ℃ to 40 ℃ and relative humidity up to 95 %, it’s ideal for indoor electrical distribution systems.
Ideal Applications
- Electrical Distribution Panels
- Industrial Load Control Systems
- Commercial & Residential Power Safety
- Machine Control & Electrical Maintenance
- Automation & Power Distribution Systems
Why Choose CNC Isolator Switch?
The CNC brand is recognized globally for precision electrical components and safety‑driven design. The YCHGL‑633150A series emphasizes optimal electrical safety, excellent load switching performance, and stable long‑term operation — essential features for engineers, installers, and maintenance professionals.
