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- Description
- Specifications
- Applications
- Advantages
- FAQ
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Description
The GDHX-9500B is an ultra-wide-range, high-precision wireless voice phase detector engineered for 1V–550kV AC systems, integrating phase verification, live-line checking, phase sequence testing, and frequency measurement in one compact unit. It adopts dual-shielding digital circuitry and FCC-compliant antenna design for superior anti-interference performance, fully compliant with EMC standards for harsh electromagnetic environments.
The system comprises two wireless transmitters (X/Y) and one sunlight-readable positive LCD receiver, supporting 150m line-of-sight RF transmission (315MHz/433MHz). It provides real-time phase angle (0–360°), frequency (45–75Hz), vector indication, and clear human voice prompts (“X signal normal, Y signal normal, in-phase, out-of-phase”). The unique on-site calibration ensures accurate phase angle readings without downtime. Built for extreme field conditions, it operates from -35°C to +50°C and includes telescopic insulated rods (3.8m max) and CAT IV safety rating. Ideal for substation phasing, overhead line synchronization, transformer commissioning, and routine maintenance across all voltage levels.
Specifications
| Parameter | Specification |
| Voltage Range | 1V–550kV AC |
| Phase Angle Range | 0.0°–360.0°；accuracy ≤±5°；resolution 1° |
| Frequency Range | 45.0–75.0Hz；accuracy ≤±2Hz；resolution 0.1Hz |
| Wireless Transmission | 315MHz/433MHz；150m lineofsight |
| InPhase Criterion | ≤20° (0–90° userconfigurable) |
| OutofPhase Criterion | >20° (0–90° userconfigurable) |
| Display | Sunlightreadable positive LCD (phase/frequency/vector/result) |
| Voice Prompt | Human voice (Inphase/Outofphase/X/Y signal normal) |
| Data Storage | 999 groups；time/date stamp |
| Phase Sequence | 120° clockwise / 240° counterclockwise indication |
| Insulated Rod | 0.6m (retracted) / 3.8m (extended)；AC 550kV withstand |
| Power Supply – Receiver | 3.7V Liion；≥10hrs；USB charging |
| Power Supply – Transmitters | 3×AA (1.5V)；≥20hrs |
| Safety Rating | IEC 610101 CAT IV 600V；Double insulation |
| Operating Temp | −35°C ~ +50°C；≤95%RH (noncondensing) |
| Storage Temp | −40°C ~ +55°C |
| Weight – Receiver | 0.31kg (with battery) |
| Total Weight | ~2.5kg (with rods/case) |
| Compliance | DL/T 971, IEC 610101, CE, EMC |
Applications
Core Test Objects
· Low voltage: 1V–1kV phase verification & synchronization
· Medium voltage: 10kV–35kV overhead lines & cables
· High voltage: 110kV–220kV substation busbars & breakers
· EHV: 500kV transmission lines & transformers
· Live line maintenance: HV presence check, phase sequence confirmation
Typical Usage Scenarios
· Grid synchronization: before connecting two independent networks (all voltages)
· Loop closing: safe reconfiguration of ring-main systems
· Commissioning: new line/cable/transformer phase validation
· Fault diagnosis: phase mismatch, reverse phasing, or missing phase
· Routine maintenance: periodic phase check in substations & power plants
Advantages
1V–550kV All-In-One Coverage
One unit for low to EHV;eliminates multiple devices → maximize cost-effectiveness & versatility
150m Long-Range RF + Strong Penetration
Long wireless range + wall/obstacle penetration → flexible operation in complex substations
On-Site Calibration + ±3° Self-Calibration Error
Field calibration without downtime → ensure accuracy & save maintenance time
Sunlight-Readable LCD + Voice Guidance
Clear display in bright sunlight + voice prompts → error-free outdoor field decisions
−35°C~+50°C Ultra-Wide Temp
Reliable performance in extreme cold/heat → suitable for all climate zones
FAQ
Q: What’s the maximum voltage for non-contact mode?
A: 550kV;non-contact for >35kV bare wires;safe without direct contact.
Q: Can it work in extreme cold or hot environments?
A: Yes. −35°C to +50°C operating range;suitable for winter in northern regions and summer in deserts.
Q: How accurate is the on-site calibration?
A: Self-calibration error ≤±3°;ensures reliable phase angle readings in field conditions.
Q: Does it support phase sequence testing?
A: Yes. Indicates 120° clockwise (positive) / 240° counter-clockwise (negative) phase sequence.
Q: What’s included in the standard package?
A: Receiver, 2× transmitters, 2× telescopic insulated rods, Li-ion battery, USB charger, AA batteries, HV probes, ground cable, carry case, user manual.
