I. Product Overview
• Bulletin Number: 813S
• Function Code: V1 (Single-phase voltage monitoring relay)
• Voltage Rating: 500V (monitoring voltage range)
• Power Supply Code: 230 (corresponding to 115/230V AC power supply)
II. Specifications
1. Input Specifications
Parameter Value
Input Terminals Not specified (single-phase signal terminals)
Power Supply Voltage 115/230V AC (power supply code 230)
Power Supply Method Self-powered
Frequency Range 50...400 Hz
Monitoring Range Overvoltage/Undervoltage (adjustable):
- Upper Level: 2...22% of nominal voltage
- Lower Level: -22...+2% of nominal voltage
Hysteresis - Setting Point 2...5%: 1%
- Setting Point 5...22%: 2%
2. Output Specifications
Parameter Value
Contact Type (2) Form C, Normally Energized (normally closed contacts)
Rated Insulation Voltage 250V AC
3. General Specifications
Parameter Value
Power ON Delay 1 s ± 0.5 s or 6 s ± 0.5 s (optional)
Degree of Protection (IP) IP 20
Pollution Degree 3
Dimensions (Width × Height × Depth) 45 × 80 × 99.5 mm
Screw Terminal Torque Maximum 0.5 N-m
III. Functional Features and Wiring Diagram
Functional Description
• Core Functions:
Monitors overvoltage or undervoltage in single-phase systems.
The relay operates when the measured value exceeds (or falls below) the set threshold and remains so for longer than the delay time.
Supports the latch function: maintains the relay output state until manually reset.
Supports the inhibit function: prevents unexpected triggering.
LED indicators display alarm status and relay output status.