Sale!
CSQ-3
CSQ-3
CSQ-3

DEIF CSQ-3 Multi-Function Generator Synchronizer

  • Model: CSQ-3
  • Brand: DEIF
  • Series: Check Synchronising Relays / Synchroscopes
  • Core Function: Multi-function check synchronising relay and LED synchroscope
  • Product Type: Generator Synchronizing Device
  • Key Specs: ±2° accuracy, LED circle display, relay output, dead-bus function
  • Condition: New Original / New Surplus
  • ⚠️ Legacy / Long-Life Model – Limited Stock of Certain Voltage Variants
Get a Quote
Categories: , , , , SKU: DEIF CSQ-3 Brand:

Description

3. Key Technical Specifications

  • Model: CSQ-3 (Land or Marine versions)
  • Function: Measures and compares generator and busbar voltage, frequency, and phase angle
  • Accuracy: ±2 electrical degrees
  • Resolution: 10 electrical degrees (36-LED circular display)
  • Frequency Range: 40–70 Hz
  • Voltage Input Ranges (selectable): 100–127 V, 220–240 V, 380–415 V, or 440–480 V AC
  • SYNC Output: 1 × SPST-NO relay contact
  • Relay Ratings: 8 A / 250 V AC (AC1), 8 A / 24 V DC (DC1)
  • Additional Features: Dead-bus functionality, high harmonic immunity, push-button setpoint programming
  • Operating Temperature: –25 °C to +70 °C
  • Mounting: DIN Q96 panel mount (96 × 96 mm)
  • Weight: Approx. 0.4 kg
  • Versions: Land (industrial) and Marine (with additional status output)

Note: Exact voltage range and Land/Marine variant must be specified when ordering. Confirm against the existing unit or system requirements.

4. Product Introduction

The DEIF CSQ-3 is a microprocessor-controlled multi-function check synchronising relay and LED synchroscope. It measures generator and busbar voltages and frequencies, compares phase angle, and provides a synchronising pulse when all conditions are within the user-set windows.

Power plant and marine engineers use the CSQ-3 for manual or semi-automatic synchronising of generators to the busbar. The circular LED display gives a clear visual indication of phase difference, while the relay output can be used to close the breaker. Dead-bus functionality allows synchronising when the bus is not energised. Available units are typically New Surplus or residual stock of specific voltage variants.

CSQ-3

CSQ-3

CSQ-3

CSQ-3

5. Troubleshooting Quick Reference

Symptom Possible Cause Relevance to this Part Quick Check Method Recommendation
No LED activity Power or voltage input missing ✅ High Measure voltage on GEN and BUSBAR terminals Verify correct voltage range variant and wiring
Incorrect phase indication Wrong phase sequence or wiring ✅ High Check phase rotation on both inputs Correct phase sequence before operation
SYNC relay never activates Setpoints too tight or voltage/frequency mismatch ✅ High Review ΔU, Δϕ, and timing settings Adjust setpoints via front push-buttons
Constant “UGEN TOO HIGH/LOW” Voltage difference outside window ✅ High Compare actual GEN vs BUSBAR voltages Correct generator voltage or widen ΔU setting
Dead-bus function not working Feature disabled or settings incorrect ✅ Medium Check dead-bus (Ubus offset) setting Enable and configure dead-bus function if required

If the problem remains unresolved, record all front-panel LED states, measured voltages, and current setpoint values before contacting support.

6. Frequently Asked Questions (FAQ)

Q: What is the difference between CSQ-3 Land and CSQ-3 Marine?
A: The Marine version includes an additional optocoupler system-status output and is typically approved for marine applications. Functionality for synchronising is otherwise the same.

Q: Can I change the voltage input range in the field?
A: No. The voltage range is fixed by the hardware variant ordered (115 V, 230 V, 415 V, or 450 V class). You must order the correct version for your system voltage.

Q: Does the CSQ-3 support automatic synchronising?
A: It is designed for manual or semi-automatic synchronising. The SYNC relay output can be used by an external control system or operator to close the breaker when conditions are met.

Q: How are the setpoints adjusted?
A: All setpoints (phase window, voltage difference, pulse length, dead-bus, etc.) are adjusted using the front-panel push-buttons under the foil cover. No external software is required.

Q: Is the still in production?
A: DEIF continues to support the family, although newer synchronising products exist. Certain voltage variants or marine versions may be available only as residual or New Surplus stock.

Q: Why is pricing lower than a new DEIF synchroniser?
A: Remaining stock of specific variants is sold as New Surplus or residual inventory. Pricing reflects available units rather than current production cost. All units are functionally verified before shipment. Standard warranty is typically 12 months.

Q: What panel cut-out is required?
A: Standard DIN Q96 cut-out: 92 × 92 mm (±1 mm).

Related products