Description
Parameters
| Parameter | Specification |
|---|---|
| Input Channels | 8, differential (isolated) |
| Input Ranges (DC) | ±10V, ±20V, ±50V, ±100V (software selectable per channel) |
| Input Ranges (AC) | 10V, 20V, 50V, 100V RMS (software selectable per channel) |
| Overload Protection | ±250V continuous; ±500V transient (1ms) |
| ADC Resolution | 24-bit Sigma-Delta |
| Accuracy (DC) | ±0.05% of reading + ±0.01% of range at 25°C; ±0.15% over -40°C to +70°C |
| Accuracy (AC) | ±0.2% of reading (50/60Hz) |
| True RMS Measurement | Built-in (for AC inputs) |
| Input Impedance | >10MΩ (all ranges) |
| Common-Mode Voltage | ±200V (DC or AC peak) |
| CMRR | >100dB at 50/60Hz |
| Filtering | Programmable low-pass: 10Hz, 50Hz, 100Hz, 500Hz, 1kHz |
| Sample Rate | 10Hz–200Hz (software selectable) |
| Diagnostics | Over-range, under-range, open-wire detection, reference voltage monitor |
| Isolation | 2500Vrms channel-to-backplane; 500VDC channel-to-channel |
| Power Supply | 5VDC (backplane), 300mA; 24VDC aux, 100mA |
| Operating Temp | -40°C to +70°C |
| Mounting | 6U VME Eurocard, 160mm depth |
| Certifications | UL, CSA, ATEX Zone 2, SIL 2 capable |
Advantages & Features
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Wide DC Input Range – The GE DS3860HCVA handles DC signals up to ±100V, eliminating the need for external voltage dividers for most generator and battery voltage measurements.
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True RMS AC Measurement – Unlike standard voltage modules, the GE DS3860HCVA performs true RMS calculation on AC signals, providing accurate readings for sinusoidal and distorted waveforms common in power systems.
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High Accuracy – 24-bit resolution and ±0.05% DC accuracy ensure the GE DS3860HCVA delivers reliable data for critical control loops and protection functions.
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Enhanced Isolation – 2500Vrms channel-to-backplane isolation protects the Mark VIe controller from high-voltage transients and ground loops.
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Dual DC/AC Capability – The GE DS3860HCVA can be configured per channel for either DC or AC measurement, allowing mixed signals (e.g., DC field voltage and AC stator voltage) on a single module.
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Flexible Filtering – Programmable filters allow the GE DS3860HCVA to be configured for fast response (1kHz) or noise rejection (10Hz).
Application Cases
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Generator Field Voltage Monitoring – The GE DS3860HCVA measures the DC field voltage of a 500MW generator (scaled to ±100V), providing critical input for the excitation control system and over-excitation protection.
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Battery Bank Voltage Monitoring – In a UPS system, the GE DS3860HCVA monitors four independent 125VDC battery strings, detecting failing cells and triggering alarms before critical loads are affected.
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AC Voltage Monitoring – The GE DS3860HCVA measures three-phase AC voltages (100V RMS via external VT) for generator synchronizing and voltage regulation, with true RMS calculation ensuring accuracy under non-sinusoidal conditions.
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DC Bus Voltage Monitoring – Monitors the 600VDC bus in a VFD system (via external divider), ensuring the drive operates within safe limits during regenerative braking.
Competitor Comparison
| Feature | GE DS3860HCVA | Siemens 6ES7331-7HF01 | ABB AI810 (high-voltage) | Rockwell 1756-IF8 (high-voltage) |
|---|---|---|---|---|
| Channels | 8 | 8 | 8 | 8 |
| DC Ranges | ±10V, ±20V, ±50V, ±100V | ±10V only | ±10V, ±30V, ±60V | ±10V only |
| AC True RMS | Yes | No | No | No |
| Overload Protection | ±250V continuous | ±30V continuous | ±100V continuous | ±30V continuous |
| Accuracy (DC) | ±0.05% | ±0.1% | ±0.1% | ±0.15% |
| Isolation | 2500V | 500V | 2500V | 500V |
| CMRR | >100dB | >90dB | >95dB | >90dB |
| SIL Rating | SIL 2 | SIL 1 | SIL 2 | SIL 1 |
The GE DS3860HCVA is the only module in this comparison offering both DC and AC true RMS measurement with a ±100V range. ABB provides similar isolation but lacks AC capability. Siemens and Rockwell are limited to ±10V DC only.
Selection Suggestions
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Choose the GE DS3860HCVA when you need to measure DC signals up to ±100V or AC signals with true RMS calculation in a single module. It is the preferred choice for generator field/excitation monitoring.
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If your application requires only DC measurement, consider the DS3860HCDA (DC-only variant) for lower cost.
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For signals >100V, use an external voltage divider or transducer to scale the signal to within the GE DS3860HCVA input range.
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For SIL 2 safety loops, the GE DS3860HCVA can be used with external voting logic and periodic proof-testing.
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Pair with matching terminal block TB300-HV (high-voltage rated with safe isolation barriers) for field wiring.
Precautions
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Voltage Dividers – For signals >100V, use precision voltage dividers (0.1% tolerance). Ensure the divider has adequate power rating and safety isolation. The GE DS3860HCVA does not provide internal attenuation.
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AC/DC Configuration – Each channel must be configured for either DC or AC measurement. Do not mix AC and DC on the same channel, as this will produce incorrect readings.
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Common-Mode Voltage – The GE DS3860HCVA tolerates ±200V common-mode. Exceeding this will damage the input stage. For high common-mode sources, use external isolation amplifiers.
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Input Filter Selection – For AC measurements, set the filter to at least 500Hz to avoid attenuating the 50/60Hz fundamental. For DC signals with noise, use 10Hz or 50Hz filters.
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Wiring and Safety – High-voltage wiring must comply with local safety standards. Use insulated cables rated for the maximum input voltage and maintain proper creepage distances.
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Calibration Interval – Factory calibration valid for 24 months. For ISO 17025 compliance, recalibrate using a precision DC/AC voltage source (0.01% accuracy) following GE service procedure.
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Ground Loops – Use differential inputs to reject ground loop noise. Connect the signal source’s common to the GE DS3860HCVA negative input only if necessary.
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ESD Protection – The front-panel connector is ESD-sensitive. Use ESD-safe handling practices.
A-B 1746-A10
A-B 1747-BA
A-B 1756-BA2
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