Features:
- Evaluates synchronism conditions before breaker closure.
- Supports 50 Hz and 60 Hz applications.
- Uses a 60/110/125 V DC auxiliary-supply configuration.
The complete 7VE5120 code defines the paralleling hardware and option set used by the installed panel.
It permits closing only when the configured voltage, frequency and phase-angle conditions are satisfied.
VT circuits and breaker timing must be tested as one synchronization chain after replacement.
Availability is confirmed against the complete 7VE5120-4CA10-0A/FF identity, required condition, quantity and delivery destination at quotation.
Verified resources for Siemens 7VE5120-4CA10-0A/FF:
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
- Synchronize a generator before connection to a busbar.
- Supervise closure between two energized power-system sections.
- Retain legacy synchronism-check logic in a SIPROTEC 3 panel.
- The closing decision uses configured limits for voltage, frequency and phase angle.
- Breaker operating time is compensated in the synchronization sequence.
- Stable measurements are required before a release is issued.
- Front indications show measured conditions and close-release state.
- Recorded events assist investigation of blocked or unsuccessful paralleling attempts.
- Operators should compare displayed values with independent bus measurements during tests.
- The output contact interfaces with the engineered breaker close circuit.
- Live-bus and dead-bus permissions follow the approved switching philosophy.
- External interlocks remain effective independently of the synchronism decision.