Reliance 25G4260
Description
Product Description
Model Number Interpretation
25: Rated power = 25 HP.
G: Series code for GV3000 AC drive platform.
42: 4 = 380–460 VAC input. 2 = NEMA 12 (IP52) enclosure.
60: Enhanced sensorless vector control, 50/60 Hz base rating.
(no suffix): Standard version with built-in keypad.
Technical Specifications
Rated Power: 25 HP (18.5 kW).
Input Voltage: 380–460 VAC, three-phase, 50/60 Hz.
Input Current: 37.0 A (full load).
Output Current: 30.4 A (full load).
Full Load Power Loss: 600 W.
Output Voltage: 0–460 VAC, three-phase.
Output Frequency: 0–200 Hz.
Control Modes: V/Hz, sensorless vector.
Enclosure: NEMA 12 (IP52), dust-tight and drip-proof, indoor panel-mount.
Operating Temperature: 0°C to +40°C (ambient).
Storage Temperature: −20°C to +60°C.
Cooling: Internal fan with side vents.
Weight: ~14.5 kg (32 lbs).
Certifications: UL, RoHS compliant.
Interface and Communication Configuration
Power Terminals: L1/L2/L3 (three-phase AC input); U/V/W (motor output); DC bus (+/−).
Control I/O: 8-channel 24 VDC digital inputs; 3 relay outputs (250 VAC / 5 A); 2 analog inputs (4–20 mA / 0–10 VDC); 2 analog outputs (0–10 VDC).
Communication: Onboard RS-232 port (behind front access panel) for keypad, HMI, or PLC connection.
Keypad/Display: Built-in membrane keypad with LED/LCD for local programming, operation control, and real-time status monitoring.
Encoder Feedback: Dedicated terminals for pulse tachometer input to enable high-precision speed regulation.
Core Functions
Dual Control Modes: Switchable V/Hz and sensorless vector control to accommodate diverse speed and torque regulation requirements.
High Low-Speed Torque: Sensorless vector control delivers stable high torque at low speeds, ensuring accurate motor performance without encoder feedback.
Comprehensive Protection: Integrated overvoltage, undervoltage, overcurrent, overload, and overtemperature protection safeguards the drive and motor.
Regenerative Energy Handling: Supports external dynamic braking resistors to dissipate regenerative energy during deceleration.
Parameter Storage: Non-volatile memory stores user-configured parameters for backup and copying.
Low-Noise Operation: Optimized PWM switching reduces acoustic noise and mechanical stress on the motor.
Application Scenarios
HVAC Systems: Ideal for large commercial and industrial heating, ventilation, and air conditioning systems (VTAC7 optimized).
Process Industry: Pumps, fans, blowers, mixers, and extruders.
Material Handling: Conveyors, cranes, and hoists.
Legacy System Retrofits: Direct replacement for older GV3000 series drives in 380–460 VAC three-phase systems.
Usage and Maintenance Instructions
Installation: Mount vertically on a rigid panel; maintain minimum clearance around the drive for proper airflow and cooling.
Wiring: Use shielded cables for control signals; separate power and control wiring to minimize electromagnetic interference.
Pre-Power Check: Torque all terminals to specifications before applying power.
Operation Monitoring: Regularly check operating current, temperature, and status during operation.
Maintenance Safety: Disconnect all power and wait for DC bus discharge before inspection or maintenance.
Periodic Maintenance: Check terminals for looseness, corrosion, or overheating; clean cooling fans and vents to remove dust buildup.
Environmental Limits: Do not operate outside the 0°C to +40°C ambient temperature range.
Storage: Keep spare units in a cool, dry, dust-free environment.
Repair Warning: Do not disassemble without professional supervision.
Environmental Limits: Do not operate outside the 0°C to +40°C ambient temperature range。
Storage: Keep spare units in a cool, dry, dust-free environment。
Repair Warning: Do not disassemble without professional supervision。
Environmental Limits: Do not operate outside the 0°C to +40°C ambient temperature range。
Storage: Keep spare units in a cool, dry, dust-free environment。
Repair Warning: Do not disassemble without professional supervision。
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