DIN Rail Mounted Self-Resetting Over/Under Voltage Relay - Adjustable Settings & LED Indicator

Quick Detail:

1.Voltage protection relay,over and under voltage protector

2.Detect the voltage level in the circuit and automatically take protective measures when abnormal voltage occurs

Description:

The Intelligent Auto-Reclosing Voltage & Energy Protection Relay: A New Paradigm in Electrical System Management

In the mission-critical electrical infrastructure of modern industry, commerce, and essential services, the stability of the power supply is the bedrock of operational continuity. Voltage anomalies—sustained overvoltage that accelerates component aging and debilitating undervoltage that stalls motors and disrupts control logic—represent a persistent and costly threat. While disconnection is a necessary defense, the subsequent downtime awaiting a manual reset directly contradicts the imperative for maximum uptime. The Intelligent Auto-Reclosing Voltage & Energy Protection Relay redefines this landscape. It is a sophisticated, microprocessor-based sentinel that integrates not only precise, programmable voltage protection with autonomous recovery but also introduces a groundbreaking layer of energy consumption management. This device transcends traditional protection by acting as an intelligent system governor, safeguarding equipment from electrical harm while proactively enforcing energy usage limits, ensuring both resilience and cost-efficiency for critical single-phase circuits.

The Intelligence of Autonomous Recovery: Ensuring Uninterrupted Operation

The defining innovation of this protector is its advanced auto-reclosing logic, which transforms it from a passive safety device into an active system manager. When a voltage fault is detected, it disconnects the load after a precise 0.5-second trip delay, filtering out transient disturbances. Crucially, it does not remain locked out. The device features a fully programmable Reset/Start Delay, adjustable from 1 to 600 seconds. After the mains supply returns and remains stably within safe parameters for this entire user-defined period, the protector automatically and safely restores power. This capability is indispensable for unattended facilities, remote sites, and critical processes where every minute of downtime translates to lost revenue or operational risk, eliminating the need for costly and delayed manual intervention.

Fully Configurable, Granular Protection with Disable Capability

Offering unparalleled flexibility, this relay allows for meticulous calibration to match specific load sensitivities, grid conditions, and application requirements. A key feature is the ability to selectively disable any protection function.

· Adaptive Voltage Protection: Users can set precise Overvoltage (230-300V) and Undervoltage (210-140V) thresholds. The inclusion of an "OFF" setting for each range provides ultimate flexibility, allowing the device to function solely as an overvoltage or undervoltage protector as needed.

· Adjustable Current Monitoring: The Current setting range (1-40/63A/OFF) adds a configurable layer of load monitoring. This can be used to provide basic overload awareness or set to "OFF" when not required, demonstrating the device's adaptable design philosophy.

· Unprecedented Energy Consumption Protection (kWh Limit): This revolutionary feature sets a new standard. Users can program a kWh protection value from 1 to 9999 or set it to "OFF." Once the connected load's cumulative energy consumption reaches this preset limit, the protector will trip. This is a transformative tool for cost control, rental equipment management, prepaid energy systems, and ensuring auxiliary circuits do not exceed allocated energy budgets.

Robust Performance Engineered for Extreme Conditions

Built for reliability in the most demanding environments, the protector is specified for continuous, trouble-free duty.

· Exceptional Operating Range and Accuracy: With an astonishingly wide operating voltage range of AC 80V to 400V, it functions reliably in areas with severely poor grid quality. Its decisions are informed by reliable data, thanks to 2% voltage measurement accuracy. It supports high-power circuits with a Rated Current of 40A or 63A.

· Industrial-Grade Durability and Safety: The 1NO output contact is engineered for a long electrical life (100,000 operations) and mechanical life (1,000,000 operations). It features a high Rated Insulation Voltage of 400V, IP20 protection, and is built to operate in Pollution Degree 3 environments. Its remarkable operating temperature range of -50°C to +55°C guarantees performance from freezing outdoor enclosures to hot industrial control panels.

Strategic Applications for Modern Electrical Management

The combination of auto-reclosing, configurable protection, and energy limiting opens a vast array of advanced applications:

· Rental & Temporary Site Power: For construction sites, event venues, or leased spaces, the kWh limit function prevents cost overruns, while auto-reclosing ensures equipment restarts after minor grid issues without a site visit.

· Sub-Metering & Cost Allocation: Perfect for tenant billing, departmental energy budgeting, or monitoring specific high-consumption equipment. The device protects the asset and tracks its energy use to a predefined limit.

· Remote & Unattended Critical Infrastructure: Protects telecommunications equipment, off-grid renewable systems, and agricultural irrigation controls. The system self-recovers from grid fluctuations, and the energy limit prevents draining backup batteries or exceeding generator fuel budgets.

· Industrial Process Equipment: Safeguards sensitive machinery like CNC centers or industrial ovens. The energy limit can be used to manage daily production energy quotas or prevent runaway conditions in heating processes.

Conclusion:

The Converged Solution for Protection, Continuity, and Energy Intelligence

This Intelligent Auto-Reclosing Voltage & Energy Protection Relay represents a significant leap forward in electrical distribution technology. It successfully converges three critical aspects of modern system management: precise equipment protection, operational continuity through automation, and proactive energy consumption control. By integrating these functions into a single, robust, and user-configurable device, it delivers unparalleled value. It reduces downtime, eliminates manual reset costs, prevents budget overruns, and provides detailed, actionable control over electrical usage. For facility managers, it is a tool for risk mitigation and cost control. For system integrators, it is a sophisticated component that simplifies complex panel design. In an era demanding resilience, efficiency, and intelligence, this protector stands as a definitive solution—a smart guardian that not only defends your electrical system but also actively manages its consumption, ensuring operational and financial performance are optimized.

Specifications:

Competitive Advantage:

Advantages of Wenzhou DAQUAN Electric Co., Ltd

1. Innovation Leadership

With 258 patents and 27 years of industry experience, we lead in R&D of industrial control devices like relays and timers, ensuring cutting-edge product performance.

2. Global Certifications

Our products hold CE, ROHS, IEC, TUV certifications plus ISO9001, meeting strict international standards for seamless global market access.

3. Scale Supply Stability

Backed by a 7,800㎡ factory, 499-strong team, and 70M RMB annual output, we guarantee efficient production and timely delivery for bulk orders.