Woodward|9905-708|Digital Synchronizer and Load Control Module

Description

Features

• Precision control for generator synchronization and load sharing
• Compatibility with open delta potential transformer (PT) setups
• Flexible speed bias output for integration with Woodward and third-party controls
• Robust design for harsh industrial environments with wide operating temperature range
• Comprehensive electrical and environmental specifications for reliable performance

Technical Specifications

• Part Number: 9905-708
• Speed Bias Output: 1–5 Vdc (compatible with Woodward products and systems requiring 1–5 V across 243 Ω resistance)
• PT Configuration: Open delta (switchgear configuration used in the US/Canada with two PTs, B-phase grounded)
• Voltage Input: 120 Vac (open delta PT configuration, 65–150 Vac input)
• Control Power Supply:
  • Operating: 18–40 Vdc continuous
  • Maximum: 10–77 Vdc (up to 5 minutes); reverse –56 Vdc continuous
  • Power Burden: 18 W, 1 A max
• Synchronizer Input:
  • Voltage: 65–150 Vac (open delta, single phase)
  • Frequency: 45–66 Hz
  • Accuracy: 0.1% of full scale
• Voltage Sensing Inputs:
  • Three-phase, 45–66 Hz
  • Burden: < 0.1 VA per phase
  • Accuracy: 0.1% of full scale
• Current Inputs:
  • 0–5 A rms (7 A rms max), 45–66 Hz
  • Burden: < 0.1 VA per phase
  • Accuracy: 0.1% of full scale
• Discrete Inputs:
  • 18–40 Vdc, 10 mA nominal burden
• Relay Driver Outputs:
  • 18–40 Vdc, 200 mA sink current
• Analog Inputs:
  • Current: 4–20 mA (243 Ω resistance)
  • Voltage: 1–5 Vdc (10 kΩ resistance)
• Environmental Specs:
  • Operating Temperature: –40 to +70 °C
  • Storage Temperature: –55 to +105 °C
  • Humidity: 95% at 38 °C (operating)
  • Vibration: 2.5 G, 24–2000 Hz