>350kVA Range

LQDZ 375kVA |400V Input | 0-420V Adjustable Output |Manual Contact Voltage Regulator| Industrial Voltage Stabilizer

Technical specifications for LQDZ-375kVA contact regulator: 0~0.42kV output, 50Hz operation, DC motor control, and advanced thermal management for industrial applications.

US$ 24,333.00
Lead time: 60 days

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Product Details

Product Tags

LQDZ 375kVA |400V Input | 0-420V Adjustable Output |Manual Contact Voltage Regulator| Industrial Voltage Stabilizer

Core Technical Specifications

Parameter	Specification	Industrial Benefit
Rated Capacity	375kVA	Heavy industrial power regulation
Input Voltage	0.4kV	Standard industrial supply voltage
Output Voltage	0~0.42kV	Precision adjustable range
Input Current	937.5A	High-current handling capacity
Output Current	892.9A	Stable output under full load
Frequency	50Hz	Compatible with European/Asian grids
Waveform Distortion	≤3%	Clean power for sensitive equipment
Starting Voltage	≤1.5%	Smooth power-up sequence

Advanced Control System

Precision Servo Drive

DC motor adjustment enables exact voltage positioning with programmable regulation speed

Symmetrical Compensation Circuit

Reversed polarity design maintains linear output (±0.2%) during load fluctuations

Integrated Monitoring

Magnetic oil level indicator
Position indicator with terminal contacts
Protection contacts for overload safety

Robust Protection Features

Short-Circuit Resilience

Withstands 5 continuous discharge cycles without winding damage

Safety Interlock System

Synchronized operation between regulator, control table, and secondary switches

Thermal Safeguards

Winding temperature rise ≤65K
Oil temperature rise ≤45K
Surface temperature rise ≤30K

"The symmetrical compensation circuit reduces voltage fluctuation by 40% compared to standard regulators during load transitions."

Thermal Management & Duty Cycle

Operating Mode	Parameters	Duration
Standard Operation	100% U_H, 100% I_H	1 hour ON / 1 hour OFF (8 cycles/day)
Continuous Operation	67% U_H, 67% I_H	Unlimited

ONAN Cooling System

Oil-Natural Air-Natural convection cooling
Maintains safe temperatures at 892.9A full load
No moving parts for maintenance-free operation

Industrial Applications

Manufacturing Plants

Stable voltage for CNC machines and automated assembly lines

Power Substations

Voltage regulation in 0.4kV distribution networks

Testing Facilities

Precision voltage supply for equipment validation

Industrial Process Control

Critical voltage stabilization for chemical processing

Performance Comparison

Feature	LQDZ-375kVA	Standard Regulators
Thermal Management	Triple-temperature monitoring (winding/oil/surface)	Single-point temperature sensing
Adjustment Precision	Servo motor with position feedback	Basic motor control
Duty Cycle	8 cycles/day at full load + continuous at 67%	4-6 cycles/day at full load