HIGHTEST SUWI-120
Multifunction Substation Test Set

Powerful, portable, and purpose-built for the field, the SUWI‑120 delivers a full suite of substation testing capabilities in a single rugged package. Whether you’re commissioning equipment, verifying protection systems, or performing scheduled maintenance, the SUWI‑120 consolidates multiple instruments into one smart, compact solution.

KEY FEATURES

  • Contact Resistance Measurement

  • Relay Timing Tests

  • Turns Ratio Measurement

  • Contact Resistance Tests

  • Low Resistance Tests

    Circuit Breaker Timing Tests

  • 4.3-inch TFT Touch Display

  • Weight: 24 lbs.

TECH SPECS

Function Range / Capability AC Voltage Output
Up to 150V AC

DC Voltage Output
Up to 220V DC

AC Current Output
Up to 110A AC (continuous), 150A peak

DC Current Output
Up to 120A DC

TTR Accuracy
±0.08% (single-phase and three-phase)

Winding Resistance Range
0.1 mΩ to 20 kΩ

Contact Resistance Resolution
0.1 µΩ

Relay Timing Measurement
0–9999 ms (±0.1 ms resolution)

Breaker Timing
Open/Close time, bounce time, contact duration

Continuity Testing
Auto-range with tone & visual feedback

Burden Testing
CT/VT secondary burden up to 25 VA

Display
4.3″ TFT colour touchscreen

Data Storage
Internal memory + USB port for export

Power Supply
Rechargeable battery & AC line input (90–264 V)

Operating Temperature
–10°C to +50°C

Weight
Approx. 24 lbs

Safety Standards
IEC 61010-1, CAT III 600V

KIT INCLUDES

(4x) 5m Input Cable Set (Red & Black), (1x) 5m V OUT Cable Set (Red & Black), (2x) 3m Contact Cable Set (Blue & White), (1x) 2.5m IN/OUT Cable Set (Black & Red), Power Cable, Ground Cable, Ethernet Cable, USB flash drive, Instruction Manual (Soft Copy), DMP Software, Cable Bag

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