Technical Documentation of Three-Phase Relay SINOTIMER STVP-936V3

• Brand: SINOTIMER
• Model: STVP-936V
• Type: Digital three-phase voltage protection relay
• Supported nominal current: up to 80A (via internal contact, for current measurement)
• Mounting: DIN rail
• Network configuration: 3 phases + neutral (3P+N)
• Visible certifications: CE, UKCA
• Applications: three-phase electrical panels, general installation protection, protection of three-phase consumers sensitive to voltage fluctuations

The SINOTIMER STVP-936V is a multifunctional electronic protection relay for three-phase electrical networks, designed for continuous voltage monitoring on each phase and automatic disconnection of the supply in case of abnormalities. The device provides protection of installations from extreme voltages, undervoltage, phase imbalance, phase loss, reverse phase sequence, and neutral conductor interruption.

The device includes in a single module:

• Real-time measurements of three-phase voltage
• Automatic protection against voltage deviations
• Internal switch element
• Digital display and configuration buttons

Display and Front Elements

• The device features three independent LED displays, dedicated to each phase:
  • V1 phase voltage L1
  • V2 phase voltage L2
  • V3 phase voltage L3
• LED indicators for overvoltage and undervoltage conditions.

Control and Configuration Buttons

• The device has four control buttons for configuration capabilities.

Terminals and Electrical Connections

• Current input: Rails (marked IN)
• Output to consumers: Rails (marked OUT)

Protection Functions

• Overvoltage protection
• Undervoltage protection
• Phase voltage imbalance protection
• Phase loss protection

Important Notes:

• The device does not provide overload or short circuit protection.
• It is not a residual current device and does not detect leakage currents.