AC power supply current source DDG-1000A

Product overview
The DDG-1000A is a primary current injector test set designed to generate controlled high currents for testing, calibration and temperature-rise measurements in power systems and electrical equipment laboratories. It provides a stable secondary current source for verification of circuit breakers, current transformers and switchgear under extreme current conditions.

Technical parameters (customizable)
The series covers models from DDG-500 to DDG-10000 with selectable primary voltage and output current ranges. Typical example values are listed below:

• DDG-500 — 3 kVA, V1: 220 V, secondary current: 500 A, dimensions: 430×338×550 mm, weight: 48 kg.
• DDG-1000 — 6 kVA, V1: 220 V, secondary current: 1000 A, dimensions: 500×380×600 mm, weight: 80 kg.
• DDG-2500 — 15 kVA, V1: 380 V, secondary current: 2500 A, dimensions: 600×430×790 mm, weight: 145 kg.
• DDG-4000 to DDG-10000 — higher-capacity models up to 60 kVA / 10000 A with integrated or split configurations (see product table for full details).

Main applications

• Circuit breaker operating characteristic tests (instantaneous and time-delay tripping).
• Current transformer (CT) ratio and accuracy calibration.
• Temperature-rise testing of busbars, switchgear and cable terminations.
• Factory inspection and routine testing of motors, relays and industrial electrical equipment.

Core functions and technical features

• Low-voltage input / high-current output architecture with compact footprint for on-site deployment.
• Stable current output through controlled autotransformer and current booster design to maintain accuracy across the rated range.
• User-friendly current regulation interface enabling smooth and precise adjustment.
• Integrated safety functions: overcurrent protection, timing alarm and clear instrument displays for real-time monitoring.
• Structural options: integrated (single-unit) or split (modular) designs to suit transport and on-site space constraints.
• Optimized cooling to support long-duration testing without thermal degradation of core components.

Case studies

• Transformer calibration at a regional electric power research institute: multi-day batch calibration achieved consistent current regulation and accurate outputs, improving throughput and measurement repeatability.
• Circuit breaker manufacturer tests: temperature-rise and short-time withstand current tests performed with stable high-current supply; timing alarm and overcurrent protection enhanced test safety and repeatability.

Company support and services
Technical support includes equipment selection guidance, site commissioning, operator training and application-specific consultation. Engineering support can provide configuration and customization to meet specific testing protocols and regulatory requirements.

Technical specifications

• Model: DDG-1000A.
• Rated capacity (example): 6 kVA; primary voltage: 220 V; nominal secondary current: 1000 A.
• Typical dimensions (DDG-1000): 500×380×600 mm; weight: 80 kg.
• Available configurations: integrated unit or split/modular versions for larger capacities.
• Protections: overcurrent protection, timing alarm, real-time instrumentation display.
• Cooling: forced / optimized cooling for continuous operation.