ABB 1SVR011718R2500

Description

Product Overview and Description

The ABB 1SVR011718R2500 is a high-quality, DIN-rail mounted, single-phase voltage monitoring relay from ABB’s renowned CM range of protection and control devices. This relay’s primary function is to safeguard electrical equipment and ensure operational continuity by continuously monitoring the supply voltage for abnormalities such as under-voltage, over-voltage, and phase failure. The ABB 1SVR011718R2500 acts as an intelligent sentinel, automatically disconnecting the load via its relay output when the measured voltage deviates outside its preset thresholds, and reconnecting it once the supply returns to acceptable levels. It is a fundamental component for protecting motors, compressors, and other sensitive three-phase equipment from damage due to poor power quality.

Product Parameters

• Device Type: Single-Phase Voltage Monitoring Relay.
• Supply Voltage (Measurement): Designed to monitor a single-phase AC voltage, typically with a wide operating range (e.g., 208-480V AC, 50/60 Hz).
• Monitoring Functions:
  • Under-Voltage (UV): Triggers when voltage drops below a set threshold.
  • Over-Voltage (OV): Triggers when voltage rises above a set threshold.
  • Phase Failure/Asymmetry: Detects loss of a phase in a three-phase system when monitored via two or three single-phase relays (one per phase).
• Setting Ranges: Adjustable delay timers for pick-up and drop-out to prevent nuisance tripping from short-duration fluctuations.
• Output: One or more changeover relay contacts (e.g., 1 CO; SPDT) with a defined switching capacity (e.g., 6A at 250V AC).
• Status Indication: LED indicators for power (green) and alarm/trip status (red).
• Mounting: Standard 35mm DIN-rail mount.
• Wiring: Spring-clamp terminals for easy installation.
• Standards Compliance: Meets relevant international standards (e.g., IEC/EN 60947-5-1, UL 508).

Advantages and Key Features

1. Robust Equipment Protection: The core advantage of the ABB 1SVR011718R2500 is its ability to prevent damage to expensive three-phase motors by disconnecting them during single-phasing or severe voltage sags, which can cause overheating and burnout.
2. Wide Voltage Range & Flexibility: Its broad operational voltage range makes it suitable for a variety of common industrial voltage levels (e.g., 230V, 400V, 480V), simplifying inventory and application.
3. Adjustable Settings & Delays: User-configurable thresholds and time delays allow for precise adaptation to specific load characteristics and network conditions, ensuring optimal protection without unnecessary shutdowns.
4. Clear Visual Diagnostics: The intuitive LED indicators provide immediate, on-site status information, allowing maintenance personnel to quickly determine if a fault is due to a power quality issue.
5. Compact & Reliable Design: Housed in ABB’s compact CM housing, the ABB 1SVR011718R2500 offers a space-saving, maintenance-free solution with a proven track record of reliability in industrial environments.

Application Cases in Various Fields

• HVAC Systems: Protecting air conditioning compressor motors and chilled water pump motors from damage caused by phase loss or unbalanced voltage in commercial buildings.
• Industrial Machinery: Safeguarding the main drive motor of a conveyor, mixer, or machine tool spindle where a voltage dip could cause a stall or mechanical jam.
• Pump Stations: Monitoring the supply to submersible or centrifugal pumps in water/wastewater applications to prevent dry running or damage from voltage fluctuations.
• Commercial Refrigeration: Protecting condenser and compressor units in supermarket cold rooms or food processing plants, where the ABB 1SVR011718R2500 ensures compressors do not attempt to start under unfavorable voltage conditions.

Comparison with Competing Products

The ABB 1SVR011718R2500 competes with single-phase voltage monitors from other major electrical component manufacturers such as Siemens (3RN series), Schneider Electric (Telemecanique XM), Eaton (Moeller Z), and Finder. Compared to a basic three-phase monitor, using three single-phase units like this one offers finer granularity by detecting which specific phase has failed. Its primary advantages are ABB’s strong brand reputation for quality, the clarity of its CM-range design, and its wide availability. Competing models offer similar core functions; the choice often comes down to brand preference, panel layout standardization, or specific feature nuances like reset methods or auxiliary supply requirements.

Selection Suggestions and Precautions

• Selection Advice:
  • System Voltage: Confirm the relay’s rated operational voltage range covers your system’s nominal voltage (e.g., 400V line-to-line). The ABB 1SVR011718R2500 monitors phase-to-neutral voltage.
  • Three-Phase System Protection: To fully protect a three-phase load, three units (one per phase) are typically required. Alternatively, consider a dedicated three-phase voltage monitor for a more integrated solution.
  • Load Characteristics: Consider the load’s sensitivity. Adjust the under-voltage threshold and delay to be above the motor’s stalling voltage and allow for brief sags, respectively.
• Important Precautions:
  • Correct Wiring: Ensure the relay is connected to the correct phase and neutral. Incorrect wiring will lead to false monitoring and potential equipment damage.
  • Adequate Contact Rating: Verify the relay’s output contact rating (6A) is sufficient to control the coil current of the contactor or breaker it is driving. For larger contactors, use an interposing relay.
  • Functional Testing: After installation, test the relay’s function by simulating a fault (e.g., disconnecting one phase) to verify the output contact opens and the alarm LED activates.
  • Environmental Limits: Install within the specified ambient temperature range. Excessive heat inside a crowded panel can affect accuracy and lifespan.
  • Use as Intended: This is a monitoring relay, not a circuit breaker or fuse. It must be installed downstream of appropriate short-circuit and overload protection devices.

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