Guance DW-100 High-Current Temperature Rise Test System
| Key | Brand: Guance Instruments |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | DW-100 |
| Output Current | 1000 A AC (adjustable) |
| Temperature Channels | 2 acquisition + 1 control loop |
| Control System | Siemens PLC + 15″ HMI touchscreen |
| Power Supply | 380 VAC ±10%, 50 Hz ±0.5 Hz, 20 kW |
| Dimensions (L×W×H) | 1400 × 1150 × 1700 mm |
| Weight | 500 kg |
| Ambient Operating Range | −30–40 °C, ≤85% RH, ≤1000 m altitude |
| Grounding Resistance | ≤4 Ω |
| Seismic Withstand | Horizontal 3 m/s², Vertical 1.5 m/s² |
Overview
The Guance DW-100 High-Current Temperature Rise Test System is an industrial-grade, programmable test platform engineered for standardized evaluation of thermal performance under sustained high-current loading conditions. Designed in accordance with IEC 60947-1, IEC 61439-1, and GB/T 14048.1–2012 requirements for low-voltage switchgear and controlgear assemblies, the system applies precisely regulated alternating current—up to 1000 A RMS—to electrical components (e.g., busbars, connectors, circuit breakers, and terminal blocks) while simultaneously monitoring temperature evolution at multiple critical points. Its core measurement architecture relies on closed-loop current regulation via analog voltage-controlled rectification, coupled with dual-channel thermocouple or RTD-based temperature sensing (typically Pt100 class B), enabling real-time correlation between electrical load, resistive heating, and thermal equilibrium behavior. The system operates autonomously for extended durations—supporting unattended 24/7 testing cycles—making it suitable for type testing, quality assurance, and compliance validation in manufacturing and third-party certification laboratories.
Key Features
- Stable 1000 A AC output with ±1% full-scale accuracy, adjustable in fine increments via HMI interface
- Dual independent temperature acquisition channels: one for ambient chamber monitoring, one for direct sample surface or contact-point measurement
- Integrated temperature control loop supporting PID-regulated auxiliary heating (via tubular heaters and forced-air circulation) to simulate elevated ambient conditions up to 40 °C
- Siemens S7-1200 PLC-based control architecture with deterministic scan cycle (<50 ms), ensuring synchronized data capture and safety interlock responsiveness
- 15-inch high-resolution resistive touchscreen HMI with password-protected access levels (operator, engineer, calibration technician)
- Real-time graphical display of current vs. time and dual-temperature vs. time curves, with configurable scaling, zoom, and overlay functions
- Comprehensive hardware-level protection: overcurrent trip (settable threshold), ground-fault detection, thermal cutoff (≥85 °C cabinet internal), and emergency stop with hardwired relay bypass
- Calibration traceability support: individual channel offset/gain adjustment for current, voltage, and temperature inputs—documented in internal audit log
Sample Compatibility & Compliance
The DW-100 accommodates a broad range of conductive and semi-conductive specimens up to 300 mm in length and 100 mm in cross-sectional dimension, including but not limited to copper/aluminum busbars, molded-case circuit breaker terminals, crimped cable lugs, and DIN-rail mounted power distribution components. Specimen mounting utilizes insulated, low-thermal-conductivity fixtures to minimize parasitic heat loss. All operational parameters—including current ramp rate, hold duration, maximum permissible temperature rise (ΔT), and pass/fail criteria—are configurable per test standard requirements. The system supports execution of tests compliant with IEC 60947-1 Annex F (temperature-rise verification), UL 67 Section 42.1, ANSI C37.20.1, and GB/T 14048.1 Clause 8.3.2. Data records meet minimum GLP documentation standards, with timestamped event logging (start/stop, alarm triggers, manual interventions) stored locally on industrial-grade SD card.
Software & Data Management
No proprietary PC software is required for basic operation; all configuration, execution, and visualization occur natively on the embedded HMI. However, the PLC exposes Modbus TCP (port 502) and OPC UA (compliant with IEC 62541 Part 4–6) interfaces for integration into centralized MES or LIMS environments. Test reports—including raw time-series datasets (current, voltage, T₁, T₂, calculated ΔT), operator ID, calibration status flags, and digital signature of final pass/fail verdict—are exportable in CSV and PDF formats via USB 2.0 port. Audit trail functionality records all parameter modifications, calibration actions, and user login/logout events with immutable timestamps—satisfying foundational requirements for FDA 21 CFR Part 11–aligned environments where electronic records are retained for ≥15 years.
Applications
- Verification of temperature rise limits in low-voltage power distribution assemblies per IEC 61439-1
- Validation of contact resistance stability in high-current relays and disconnect switches
- Accelerated aging studies of conductor insulation systems under combined thermal-electrical stress
- Pre-certification testing for CCC, CE, and KC mark submissions requiring thermal endurance evidence
- In-process QA screening of busbar welding joints and bolted connections in switchgear OEM lines
- Research into joule-heating dynamics and thermal runaway thresholds in novel conductor materials
FAQ
What standards does the DW-100 directly support?
The system is configured to execute test sequences aligned with IEC 60947-1, IEC 61439-1, GB/T 14048.1, and UL 67. Custom test profiles can be implemented via PLC logic modification under engineering supervision.
Is external cooling required during continuous 1000 A operation?
No. The integrated forced-air circulation system maintains uniform internal temperature distribution without requiring chilled water or external HVAC coupling—provided ambient conditions remain within specified limits (−30–40 °C, ≤85% RH).
Can the system perform ramp-hold-cool-down profiles?
Yes. The PLC program supports multi-step current profiles (e.g., 200 A → 600 A → 1000 A, each with defined dwell times), with automatic initiation of cooldown monitoring upon current termination.
How is measurement uncertainty managed across service life?
Each analog input channel (current, voltage, temperature) includes field-accessible calibration registers. Certified reference instruments (e.g., Fluke 5522A, Keysight 3458A, and calibrated dry-well calibrators) are used during biennial verification; results are archived with NIST-traceable certificates.
Does the system include electromagnetic compatibility (EMC) certification documentation?
The DW-100 complies with EN 61000-6-2 (immunity) and EN 61000-6-4 (emission) for industrial environments. Full EMC test reports per CISPR 11 and IEC 61000-4-x series are available upon request for regulatory submission packages.
