ABB SV1-10483156

Core Technical Specifications

• Rated Monitoring Voltage: 48V AC fixed measurement range
• Pickup Voltage Adjustment Range: 85%–115% of rated monitoring voltage continuous adjustable via front panel calibrated dial
• Dropout/Pickup Ratio: 85%–98% high dropout ratio for AC voltage monitoring
• Contact Configuration: 1 Form C (1NO + 1NC) mechanical auxiliary contact
• Contact Rated Capacity: 250V AC 5A resistive load, maximum trip coil drive current 3A
• Operating Ambient Temperature: -25°C to +60°C
• Mechanical Service Life: Minimum 10 million switching cycles
• Electrical Service Life: 100,000 cycles under full rated contact load

Function Features

1. Front Panel Calibrated Visual Scale: Clear printed voltage percentage dial for accurate on-site threshold adjustment without external measuring instrument
2. Reversible Contact Configuration: NO/NC contact can be manually converted between normally open and normally closed state to match different interlock logic
3. Low VA Burden Monitoring Circuit: Minimal power consumption voltage sampling circuit, no extra load impact on monitored power supply circuit
4. Mechanical Operation Indicator Flag: Visual red mechanical trip flag pops out when voltage threshold triggered for visible fault status identification without auxiliary power supply
5. Anti-vibration Mechanical Structure: Reinforced plunger core spring assembly to avoid false tripping under cabinet vibration from contactors and circuit breakers

Application Scenarios

Material Composition & Structural Characteristics

• Relay Housing: Flame-retardant black thermosetting plastic DIN rail mount housing
• Electromagnetic Core Assembly: Laminated silicon steel plunger core with copper excitation coil
• Contact Material: Silver cadmium oxide alloy contact points for anti-arcing and long service life
• Mounting Standard: 35mm standard DIN rail snap mounting structure
• Protection Grade: IP40 housing front panel protection

Working Principle

1. Monitored AC voltage enters internal excitation coil to generate proportional electromagnetic suction force on plunger core
2. When voltage rises above preset overvoltage threshold or drops below undervoltage threshold, electromagnetic force changes to overcome spring tension and pull plunger core actuate contact switch
3. Contact state change outputs digital trip or alarm signal to external circuit breaker trip coil or PLC digital input terminal
4. Mechanical indicator flag pops out simultaneously to record voltage fault status until manual reset operation

Installation Requirements

1. Snap mount on standard 35mm DIN rail inside low-voltage distribution cabinet, install adjacent to monitored power supply circuit terminal block
2. Monitoring voltage wiring use 1.0–2.5mm² solid copper wire, tighten terminal screw torque to 1.2N·m
3. Avoid installation adjacent to high-current contactors to prevent electromagnetic interference causing false voltage trip
4. Ambient cabinet relative humidity maintain 5–95% non-condensing, no corrosive gas environment

Usage Precautions

1. Do not use for continuous operation near pickup voltage threshold (±10% rated voltage range), frequent contact switching accelerates contact ablation
2. Regularly clean contact surface oxide layer every 12 months in humid coastal industrial environments
3. Do not connect inductive load (solenoid, relay coil) directly to contact terminals without freewheeling diode suppression circuit
4. Re-calibrate voltage threshold dial after long-term cabinet vibration or equipment relocation to guarantee monitoring accuracy