Specifying custom advanced circuit breaker timing and trip tester suppliers for Wholesale and OEM Orders

Measured Performance in Real Use

Field data from three utility test labs show timing repeatability within ±0.5 ms across 10 kV‑30 kV breakers when the sampler runs at 200 kS/s.

Parameter	Typical Range	Test Condition
Timing accuracy	±0.3 ms to ±0.7 ms	IEC 60947‑2, 200 kS/s
Trip current span	0.5 A – 5 kA (adjustable)	IEEE C37.04, 50/60 Hz
Voltage rating	Up to 36 kV RMS	Phase‑to‑ground, dry
Sampling resolution	0.1 µs per sample	Internal clock, 10 MHz

Matching the Product to the Buyer's Need

Standard‑grade tester

Timing accuracy ±0.7 ms, trip range 0.5 A‑2 kA, fixed 100 kS/s sampler.

Best for distributors servicing medium‑voltage panels where test volume is moderate and budget per unit is constrained.

High‑resolution tester

Timing accuracy ±0.3 ms, trip range 0.5 A‑5 kA, 200 kS/s sampler with GPS‑sync option.

Chosen by OEMs that must certify breaker coordination curves to ±0.5 ms for regulatory submissions.

Assumptions Buyers Should Stop Making

Assuming all suppliers calibrate to the same reference. In practice, calibration labs may use different reference standards (e.g., national metrology institute vs. in‑house primary), leading to systematic offsets of up to 0.2 ms that only surface during cross‑lab verification.

Another common error is treating the trip‑current setting as a fixed spec; the actual trip point drifts with temperature coefficient of the current sensor, typically 0.02 %/°C.

Buyers also expect identical firmware revision across batches without a formal change‑control agreement; firmware updates can alter sampling latency by 5‑10 µs.

What Can Be Customised and What Cannot

custom advanced circuit breaker timing and trip tester suppliers

Feature	Customisable	Fixed
Front‑panel branding (logo, colour)	Yes – silk‑screen or laser etch	No
Trip‑current range	Yes – selectable 0.5 A‑5 kA	No
Sampling rate	Yes – 100 kS/s or 200 kS/s	No
Internal clock source	No – fixed 10 MHz TCXO	Yes
Enclosure IP rating	No – IP54 standard	Yes

How Consistency Is Held Across Batches

Statistical process control

Each production lot runs a 30‑unit SPC chart on timing accuracy; control limits set at ±0.15 ms around the nominal ±0.3 ms spec.

Out‑of‑control points trigger a root‑cause review before release.

Traceable calibration packets

Every tester ships with a calibration certificate referencing the national standard, serial‑number linked, and a QR code for on‑line verification.

Batch‑level audit logs are retained for 5 years and available on request.

Questions Buyers Ask Before Ordering

What is the minimum order quantity for a custom‑branded run? Typically 20 units; lower quantities incur a set‑up surcharge of $1,200.
Lead time from approved artwork to first shipment? 6‑8 weeks for standard‑grade, 8‑10 weeks for high‑resolution, assuming component availability.
Can the tester be supplied with a 19‑inch rack mount kit? Yes – rack ears are an optional accessory, add $85 per unit.
What documentation is included for regulatory filing? Calibration certificate, IEC 60947‑2 test report, and a Declaration of Conformity.
How are spare‑part kits handled for after‑sales service? Standard spare kit (sensor board, display, power supply) stocked for 3 years; custom parts require a separate agreement.
Freight packaging for container loads? Units are packed in anti‑static foam inserts, 4 per export carton, 24 cartons per 20‑ft container.