What are the common causes of ACB tripping?

ACBs typically trip due to overloads, short circuits, or ground faults. Regular maintenance and relay testing help identify and calibrate these protection settings.

What is the purpose of arc chute maintenance in ACBs?

Arc chutes quench the electrical arc produced when the breaker opens. Over time, they can gather soot and become damaged. Cleaning and inspecting them is vital for safe operation.

Can an ACB be upgraded to a modern numerical trip unit?

Yes, we specialize in ACB retrofitting where we replace old thermal-magnetic trip units with modern micro-processor based trip units for better accuracy and communication features.

Which ACB brands do you service?

We service all major makes including L&T, Schneider Electric, Siemens, ABB, C&S Electric, Legrand, and Havells air circuit breakers, covering both older thermal-magnetic and modern microprocessor-release models.

Do you offer AMC for ACB maintenance across North India?

Yes. Our ACB Annual Maintenance Contracts include scheduled overhauling, annual electrical testing, trip unit verification, and priority breakdown support across Delhi NCR and major North India cities, with pan-India coverage for multi-site clients on request.

Air Circuit Breaker (ACB) Services — 11KV - 66KV testing and maintenance by SK Enterprises

11KV - 66KV Systems

Direct Engineering Access

Air Circuit Breaker (ACB) Services

ACB overhauling, contact resistance and Hi-Pot testing, trip unit calibration, retrofitting, and preventive maintenance for industrial LT switchgear across Delhi NCR and North India.

Technical Definition

What is Air Circuit Breaker (ACB) Services?

“Air Circuit Breaker (ACB) servicing involves the complete overhauling and protection calibration of low-voltage switchgear to ensure reliable load interruption and personnel safety in industrial power systems.”

Service Overview

SK Enterprises delivers complete Air Circuit Breaker (ACB) services—overhauling, contact and arc chute maintenance, contact resistance and Hi-Pot testing, release/trip unit calibration, and microprocessor retrofitting. Based in New Delhi NCR with North India coverage and pan-India support on request, we keep your LT switchgear tripping accurately and running safely.

Complete overhauling and servicing

Contact resistance testing

Hi-Pot (High Potential) testing

Relay and protection testing

Arc chute maintenance

Control circuit verification

Engineering Specifications

01Contact resistance measurement

02Insulation resistance (IR) testing

03Trip unit calibration

04Protection relay testing

05Operating mechanism inspection

06Auxiliary contact verification

Standard Testing Protocol

OEM Brands We Service

Our engineers are trained across all major switchgear makes, so a single team can maintain your entire mixed-OEM fleet.

L&T

Schneider Electric

Siemens

ABB

C&S Electric

Legrand

Havells

Industries We Serve

Manufacturing plants and process industries

Commercial buildings and data centers

Hospitals and healthcare facilities

Warehousing and logistics hubs

Utilities and captive power plants

Annual Maintenance Contracts (AMC)

Our ACB AMC packages cover scheduled overhauling, annual contact resistance and Hi-Pot tests, trip unit verification, priority breakdown support, and documented reports for statutory and insurance audits. Pricing depends on breaker count and site location.

Service Coverage

Headquartered in New Delhi NCR, SK Enterprises provides on-site ACB overhauling, testing, and retrofitting across Delhi, Noida, Greater Noida, Ghaziabad, Gurgaon, Faridabad, Chandigarh, Mohali, Panchkula, Jaipur, Lucknow, Kanpur, Dehradun, Haridwar, Roorkee, Meerut, Agra, Ludhiana, Jalandhar, Amritsar, and Jammu, with pan-India industrial site support on request.

Tier 1 — Delhi NCR

Tier 2 — Priority cities