The TDK-Lambda EMHP30 is a high-power DC power supply employing regulated SCR phase control topology for demanding industrial and test applications. This fully metered unit delivers constant voltage and constant current operation with automatic crossover, variable-speed forced air cooling, and built-in RFI protection. The EMHP30 represents a 30V, 3000A model within a series extending to 90 kW maximum output. Though legacy equipment not recommended for new designs, it remains operational for existing installations requiring high current bulk power delivery with precise regulation and contactor-based on/off interlock control.
## Technical Specifications
• **Topology:** Regulated SCR phase control
• **Output Regulation:** Constant voltage (CV) and constant current (CC) with automatic crossover
• **Output Voltage:** 0–30 V
• **Output Current:** 0–3000 A
• **Maximum Power Output:** 90 kW
• **Output Voltage Ripple:** 50–400 mV RMS (model dependent)
• **Output Current Ripple:** 0.02–5 A RMS (model dependent)
• **Load Regulation (Voltage):** ±0.1% typical
• **Line Regulation:** ±0.1% typical
• **Output Stability:** ±0.05% for 8 hours under constant external conditions
• **Temperature Coefficient:** 0.02%/°C (voltage and current, maximum rating)
• **Recovery Time:** Within 1% of final value in 200 ms typical for line variations ±10% or load changes between 50–100% of rating
• **AC Input:** 460 VAC ±10%, 50/60 Hz; operational 440–480 VAC
• **Cooling:** Forced air with variable-speed fan
• **Protection:** Built-in RFI protection
• **Control:** Contactor on/off interlock; metered output with mode indicator lights
## Key Features
• Delivers up to 90 kW DC output with 3000 A maximum current capability
• Dual-mode regulation eliminates manual crossover switching between CV and CC operation
• Full metering and visual mode indication for operational transparency
• Variable-speed cooling optimizes thermal efficiency and reduces acoustic noise
• Wide AC input tolerance (440–480 VAC) accommodates utility supply variations
## Typical Applications
Electrolytic cell power, galvanizing systems, battery charging, materials testing, and industrial process control requiring stable, high-current DC delivery.
## Compatibility & Integration
Legacy TDK-Lambda equipment. For new designs, TDK-Lambda recommends Genesys™ or GENESYS+™ series alternatives.
