Does the device support blind testing?

Yes, it can accurately measure ratio and group number without knowing any parameters or selecting wiring modes.

What is the measurement accuracy range?

Accuracy is 0.1% for 0.9-200, 0.2% for 200-2000, and 0.3% for 2000-10000 ratio ranges.

Can the device test three-phase windings automatically?

Yes, it realizes three-phase winding automatic testing, measuring polarity, ratio, error, and tap positions in one go.

Hertz Power Portable Handheld Transformer Ratio and Group Tester TTR Test Set

Name: Hertz Power Portable Handheld Transformer Ratio and Group Tester TTR Test Set
Brand: Wuhan Hertz Power Equipment Co., Ltd
SKU: 2176120565

Hubei, ChinaWuhan Hertz Power Equipment Co., Ltd

US$1,799.00-6,999.00

1 Piece

Product profile

After-sales Service

24-Hour Online Service

Warranty

One Year

Display Type

Analogue and Digital

Model NO.

HZBB-S

Certification

Customized

Model No.

Hzbb-S

Phase

Three

Turns Ratio Test Range

0.9~10000

Operating Temperature

-10ºC~50ºC

Usage

Audio, Transformer Turns Ratio Tester

Accuracy

1-1000, Grade 0.2 1000-10000 Grade 0.5

Group

1-12 Points

Display

LCD

Weight

3.5kg

Typical Application

Tests Turns Ratio, Phase Displacement and Polarity

Dimension

258mm(L)×158mm(W)×58mm(H)

Transport Package

Wooden Box with Foam

Specification

258*158*58mm

Trademark

HRETZ POWER

Origin

Wuhan, China

HS Code

9031809090

Production Capacity

120 Sets/Month

Key features

Blind Test Capability: Accurately measures ratio and group without knowing transformer parameters or wiring mode.

Real Three-Phase Test: Digital synthesis of three-phase sine wave with distortion <0.1% and symmetry >0.05%.

Portable Design: Lightweight at 1.8kg with dimensions 258x158x58mm, ideal for outdoor and site testing.

Long Battery Life: Built-in lithium-ion battery supports over 500 consecutive measurements without external power.

High-Definition Display: 5-inch true color LCD with hexagonal vector diagrams for intuitive connection group visualization.

Tap Position Testing: Quickly measures ratio error at each tap position after inputting rated ratio once.

Large Data Storage: Stores up to 1000 groups of calibration results with power-down memory protection.

CE Certified Quality: Complies with IEC standards and holds CE certification for safety and reliability.

Company profile

Wuhan Hertz Power Equipment Co., LtdHubei, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available CertifiedCustomization Options: Customization from Samples CertifiedNearest Port: Wuhan Port, Shenzhen Port, Shanghai PortAverage Response Time: ≤1.64h CertifiedTerms of Payment: LC, T/T, D/P, etc.

AI-Powered supplier vetting

SummaryWuhan Hertz Power Equipment Co., Ltd. is an electrical and power equipment manufacturer, seller, repair provider, and technical service supplier based in Wuhan, China. It holds ISO9001:2015 and ISO14001:2015 certificates, reports available SDK capability, design-based customization, four production lines, inventory capability, and documented finished-product inspection instructions. Its stated product output includes cable fault locators, transformer oil hipot testers, relay protection testers, power frequency test devices, and series resonance AC test sets. The supplier exports primarily to North America, with exports representing 51%–70% of total sales and seven years of export experience. However, it reports no valid manufacturing-capacity contract with related subcontractors, no overseas warehouse or showroom, no outsourcing SOP, and no continuous quantity reconciliation for each batch. Evidence of customer cases and after-sales execution is insufficient.

Supplier typeThe supplier is identified as a China-based manufacturer and seller of instruments, electrical and power equipment, and mechanical equipment, with repair, research and development, software, and technical service activities. Its registered and physical addresses are the same Wuhan location, supporting classification as an equipment manufacturer and technical-service provider.

CertificationsThe supplier reports holding ISO9001:2015 and ISO14001:2015 certificates. These explicitly demonstrate quality-management and environmental-management certification, although no certificate scope or validity dates are provided.

R&D capabilityThe supplier reports available SDK capability and includes equipment research and development, software development, technology development, consultation, and technical exchange in its scope. These facts support technical-development capability, but no R&D investment, patent, product-development record, or engineering-team scale is provided.

Production capacityThe supplier reports four production lines, inventory capability, and stated annual product outputs across five categories, including 500 cable fault locators, 1,000 transformer oil hipot testers, 1,000 relay protection testers, 800 power frequency test devices, and 500 series resonance AC test sets. Capacity controls have weaknesses: there is no valid manufacturing-capacity contract with related subcontractors, no continuous batch quantity reconciliation, and no outsourcing SOP.

Customization capabilityThe supplier explicitly reports customization from customer designs. This is direct evidence of design-based customization capability, although the available information does not specify engineering scope, tooling capability, lead times, or customization limitations.