ABB CM-SRN Over or Undercurrent Monitoring Relay 1SVR450125R0100

ABB CM-SRN Over or Undercurrent Monitoring Relay (1SVR450125R0100) Technical Specifications

Manufacturer: ABB
Product Series: CM-SRN
Order Code: 1SVR450125R0100
Product Type: Overcurrent / Undercurrent Monitoring Relay

General Specifications

• Designed for monitoring AC and DC currents
• Suitable for overcurrent (OC) and undercurrent (UC) protection
• Undercurrent monitoring is available on the 24–240 V AC/DC supply version
• Fast response time for industrial monitoring applications
• DIN rail mounting (35 mm)

Supply Voltage

• Rated supply voltage: 24–240 V AC/DC
• AC frequency: 50/60 Hz

Measuring Ranges

Selectable measuring ranges:

• 0.3–1.5 A
• 1–5 A
• 3–15 A

Three measuring ranges are integrated into a single relay.

Monitoring Functions

• Overcurrent monitoring
• Undercurrent monitoring
• Adjustable switching threshold
• Adjustable switching hysteresis
• Adjustable ON-delay

Adjustable Parameters

• Switching hysteresis: 5–30% of the set threshold
• ON-delay: 0.05–1 s or 1.5–30 s (selectable)

Output Contacts

• 2 changeover (DPDT / 2 C/O) relay outputs
• Electrically isolated output contacts

Indicators

• Green LED: Power supply indication
• Yellow LED: Output relay status

Electrical Isolation

• Galvanic isolation between:
  • Supply circuit
  • Measuring circuit
  • Output contacts

Response Time

• Measuring cycle approximately 80 ms for rapid current detection.

Environmental Conditions

• Operating temperature: –25 °C to +65 °C
• Suitable for industrial environments

Mechanical Data

• Mounting: 35 mm DIN rail
• Dimensions (H × W × D): Approximately 100 × 45 × 78 mm
• Housing width: 45 mm
• Weight: Approximately 300 g

Typical Applications

• Motor protection
• Pump monitoring
• Conveyor systems
• Industrial machinery
• Generator current supervision
• Process automation
• Alarm and protection systems

Key Features

• Universal 24–240 V AC/DC supply voltage
• Six current ranges up to 15 A
• Selectable overcurrent or undercurrent monitoring
• Adjustable threshold, hysteresis, and delay
• Two SPDT relay outputs
• LED status indication
• Fast response with galvanic isolation
• Compact DIN rail design for control panels