SINOTIMER SVP-921VA Voltage and Current Protection Mechanism with DIN rail mounting, 230V, 80A.

General Description

The SINOTIMER SVP-921VA is a protection device designed for monitoring and safeguarding electrical installations from surges, sags, and overcurrents. It displays real-time voltage and current readings and automatically disconnects the supply if preset values are exceeded, protecting connected equipment. Reconnection occurs automatically once parameters stabilize and the default delay time has elapsed.

Technical Features

• Power supply voltage: AC 220V
• Frequency: 50/60Hz
• Operating voltage range: AC 80V - 400V
• Adjustable current: 1 - 40 / 63 / 80A (depending on model)
• Rated current: up to 80A
• Measurement accuracy: 2%
• Delay time: 0.1 - 500 sec
• Response time: 0.1 - 30 sec
• Insulation protection voltage: 400V
• Output: 1 NO (Normally Open)
• Electrical lifespan: 100,000 cycles
• Protection degree: IP20
• Operating temperature: -5°C to +55°C

Operational Features

• Surge protection: Range: 230V - 300V, Default: 270V
• Surge reset: Range: 225V - 295V, Default: 265V
• Sag protection: Range: 140V - 210V, Default: 170V
• Sag reset: Range: 145V - 215V, Default: 175V
• Overcurrent protection: Range: 1 - 40 / 63 / 80A, Default: 40/63/80A (depending on model)
• Reconnection delay time: Range: 1 - 500 sec, Default: 30 sec
• Response time: Range: 0.1 - 30 sec, Default: 1 sec
• Voltage and current calibration: Range: 9.5%

Electrical Connections

The device has 4 terminals:

• 1 (L): Line input
• 2 (N): Neutral input
• 3 (L): Line output
• 4 (N): Neutral output

The wiring diagram is printed on the case and confirmed in the wiring and dimension diagrams of the manual.

Operation

Upon power-up, the device enters monitoring mode:

• Displays voltage (V) and current (A)
• Compares measurements with preset threshold values
• Disconnects power when thresholds are exceeded
• Automatically restores power after recovery and delay

Interface and Control

• Dual LED display (voltage / current)
• SET button for menu access
• + / - buttons for adjustments
• Manual ON/OFF button
• Status indicator LED

The menu includes parameters such as:

• A01 Start delay time
• A02 Overvoltage threshold
• A03 Overvoltage reset
• A04 Overvoltage delay
• A05 Overvoltage response time
• A06 Undervoltage threshold
• A07 Undervoltage reset
• A08 Undervoltage delay
• A09 Undervoltage response time
• A10 Overcurrent protection
• A11-A15 Advanced functions (calibration, repeated protection)

Advantages

• Complete voltage and current protection
• Ideal for general household protection
• Quick DIN rail mounting
• Advanced and precise settings
• Clear displays and real-time monitoring
• Supports high loads

Applications

• Residential electrical panels
• General installation protection
• HVAC systems
• Light industrial machinery
• Servers and IT equipment

Usage Conditions

• Installation must be performed by a certified electrician
• Use in dry indoor environments
• Observe proper L/N connections
• Do not exceed the maximum allowable current

Package Contents

• 1 x SINOTIMER SVP-921VA voltage and current protection device
• 1 x User manual