The Sorensen DCR300 series (part of the DCRA/B family from Ametek) consists of heavy-duty, highly regulated, SCR phase-controlled DC power supplies. Engineered for either bench or rackmount applications, these supplies (including the DCR 300-1.5B, DCR 300-3B, and DCR 300-9B) combine the high efficiency of SCR phase control with a passive LC filter to deliver up to 300V of precise DC output. They feature automatic crossover between constant-voltage and constant-current modes, analog programming, remote sensing, and comprehensive protection systems.
Specifications
General
| Parameter | Value |
|---|---|
| Interfaces | Analog programming (resistance, voltage), remote sensing, series/parallel master-slave |
| Display | Dual analog meters (voltage and current) |
Physical
| Parameter | Value |
|---|---|
| Power Supply | 115 Vac (103-127 Vac) or 208 Vac (187-229 Vac) single-phase (model dependent), 50-63 Hz |
| Operating Temperature | 0 to +70 °C |
| Dimensions (W×H×D) | 482.6 mm (W) x 133.3 to 311.0 mm (H) x 457.0 to 559.0 mm (D) (model dependent) |
| Weight | 18.1 / 30.3 / 63.5 kg (model dependent) |
Output Specifications
| Parameter | Value |
|---|---|
| Rated Output Voltage Range | 0 to 300 Vdc |
| Rated Output Current (DCR 300-1.5B) | 0 to 1.5 Adc |
| Rated Output Current (DCR 300-3B) | 0 to 3.0 Adc |
| Rated Output Current (DCR 300-9B) | 0 to 9.0 Adc |
| Maximum Output Power (DCR 300-1.5B) | 450 W |
| Maximum Output Power (DCR 300-3B) | 900 W |
| Maximum Output Power (DCR 300-9B) | 2700 W |
| Line Regulation (Voltage) | 0.05% of maximum output voltage (150 mV) |
| Load Regulation (Voltage) | 0.05% of maximum output voltage (150 mV) |
| Line Regulation (Current) | 0.15% of maximum output current |
| Load Regulation (Current) | 0.15% of maximum output current |
| Output Ripple and Noise (RMS) | 450 mV RMS |
| Transient Recovery Time | 50 ms typical (recovery to within 1% of regulation for a 50-100% or 100-50% step load change) |
| Temperature Coefficient (Voltage) | 0.015% of max output voltage per °C (45 mV/°C) |
| Temperature Coefficient (Current) | 0.03% of max output current per °C |
| Voltage Programming Resolution | Infinite (continuous potentiometer control) |
| Current Programming Resolution | Infinite (continuous potentiometer control) |
| Operating Modes | Constant Voltage (CV) and Constant Current (CC) with automatic crossover |
Protection and Diagnostics
| Parameter | Value |
|---|---|
| Over Voltage Protection (OVP) Range | Adjustable from 30 to 330 Vdc (10% to 110% of maximum output voltage) |
| Over Voltage Protection Type | SCR Crowbar |
| Output Isolation Voltage to Chassis | 1000 Vdc maximum |
Control and Interface
| Parameter | Value |
|---|---|
| Front Panel Controls | Power circuit breaker, fine and coarse voltage adjust, fine and coarse current adjust, OVP adjust |
| Analog Programming Options | Resistance programming (200 ohms/volt standard) or voltage programming |
| Remote Shutdown Input | Unit shutdown circuit via rear terminal contact closure |
| Series Operation Capacity | Up to 2 identical units connected in series (requires external protection diodes) |
| Parallel Operation Capacity | Master/slave parallel configuration up to 3 identical units |
| Panel Meter Accuracy | 2% of full scale |
Environmental and Safety
| Parameter | Value |
|---|---|
| Storage Temperature Range | -40 to +85 °C |
| Temperature Derating | Linearly derate output above 40 °C to 50% capacity at 70 °C |
| Cooling System (DCR 300-1.5B) | Convection cooled |
| Cooling System (DCR 300-3B, 9B) | Internal fan cooled |
Physical Characteristics
| Parameter | Value |
|---|---|
| Form Factor | Benchtop or Rackmount (model dependent) |
| Chassis Width | 19 inches (482.6 mm) |
| Chassis Height (DCR 300-1.5B) | 3U (5.25 inches / 133.3 mm) |
| Chassis Height (DCR 300-3B) | 3U (5.25 inches / 133.3 mm) |
| Chassis Height (DCR 300-9B) | 7U (12.25 inches / 311.0 mm) |
| Chassis Depth (DCR 300-1.5B) | 18.0 inches (457.0 mm) |
| Chassis Depth (DCR 300-3B) | 18.0 inches (457.0 mm) |
| Chassis Depth (DCR 300-9B) | 22.0 inches (559.0 mm) |
| Unit Weight (DCR 300-1.5B) | 40 lbs (18.1 kg) |
| Unit Weight (DCR 300-3B) | 65 lbs (29.5 kg) |
| Unit Weight (DCR 300-9B) | 190 lbs (86.2 kg) |
| DC Output Connection | Rear terminal strip only |
AC Input Specifications
| Parameter | Value |
|---|---|
| Nominal AC Input (DCR 300-1.5B, 3B) | 115 Vac single-phase (103-127 Vac range) |
| Nominal AC Input (DCR 300-9B) | 208 Vac single-phase (187-229 Vac range) |
| AC Input Frequency Range | 57 to 63 Hz |
| AC Input Connection | Rear-mounted barrier strip |
Remote Programming
| Parameter | Value |
|---|---|
| Voltage Programming Resistance | 1000 Ω/V |
Front Panel Controls
| Parameter | Value |
|---|---|
| Voltage Control Type | 10-turn potentiometer |
| Current Control Type | 1-turn potentiometer |
Performance & Stability
| Parameter | Value |
|---|---|
| Output Drift (Voltage) | 0.15% of maximum rated voltage over 8 hours |
| Output Drift (Current) | 0.5% of maximum rated current over 8 hours |
| Warm-Up Time | 30 minutes |
AC Input
| Parameter | Value |
|---|---|
| AC Input Current (DCR 300-1.5B) | 6.5 A @ 115 VAC |
| AC Input Current (DCR 300-3B) | 11 A @ 115 VAC |
Environmental
| Parameter | Value |
|---|---|
| Operating Altitude | Up to 10,000 ft (3,000 m) |
| Storage Altitude | Up to 40,000 ft (12,000 m) |
| Operating Humidity | Up to 95% RH, non-condensing |
Power Supply
| Parameter | Value |
|---|---|
| AC Input Phase (DCR 300-1.5B, 3B) | Single-phase |
| AC Input Phase (DCR 300-9B) | Single-phase |
Performance
| Parameter | Value |
|---|---|
| Remote Voltage Programming Accuracy | ±1% of maximum output voltage |
| Remote Current Programming Accuracy | ±1% of maximum output current |
Technology
SCR Phase Control with Passive LC Filter
Applications
Benchtop or Rackmount Programmable DC Power Supply