Adjustable Voltage and Current Protector

Protect sensitive equipment with adjustable voltage and current protectors. Wide-range settings for overload, overvoltage, and undervoltage protection. Ideal for unstable grid conditions and motor protection. DIN rail mount. Customizable trip points. Real-time monitoring.

AVP1-63

1P+N 63A DIN Rail Voltage Current Protector | Programmable Over/Under Voltage

The AVP1‑63 adjustable voltage and current protector is designed for single‑phase AC systems up to 63A. It features programmable over‑voltage (240‑300V) and under‑voltage (140‑210V) thresholds, fully adjustable startup and recovery delay times (1‑300s), and low power consumption (<2W). Housed in a compact 1P+N DIN‑rail module, it delivers precise protection against voltage fluctuations and over‑current events for residential, commercial, and industrial electrical panels.

AVP3-63

80A 3P+N DIN Rail Voltage Current Protector | Over/Under Voltage, Overcurrent & Phase Sequence Protection

The AVP3‑63 three‑phase voltage and current protector is designed for 3P+N AC systems with adjustable rated currents of 63A, 80A and 100A. It integrates five‑in‑one protection: over‑voltage (390‑500V adjustable), under‑voltage (140‑370V adjustable), over‑current, phase asymmetry and phase sequence protection. Featuring automatic recovery, real‑time voltage/current dual digital display, and 35mm DIN rail mounting, it delivers comprehensive protection for industrial motors, compressors, pumps and sensitive three‑phase equipment.

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Select Your Adjustable Voltage and Current Protector

Wide-range adjustable voltage and current settings for overload, overvoltage, and undervoltage protection. Ideal for sensitive equipment, motor protection, and unstable grid conditions. Customizable trip points to match your specific application.

Wide Adjustable Range
Multi-Protection (Over/under voltage, overload)
Real-time Monitoring
Easy Integration (DIN rail mount)

Adjustable Voltage and Current Protector Parameter Overview

Model	Voltage Range (V)	Current Range (A)	Protection Type	Trip Delay	Display	Mounting
ZR-AMB 360S	100-360 AC	1-50	Over/under voltage, overload	Adjustable (0.1-10s)	LED	DIN rail
ZR-AMB 360E	100-360 AC	1-100	Over/under voltage, overload	Adjustable (0.1-10s)	LCD	DIN rail
ZR-AMB 690P	200-690 AC	1-200	Over/under voltage, overload, phase loss	Adjustable (0.1-10s)	LCD	DIN rail

Quality You Can Rely On

Our adjustable protectors are manufactured under ISO9001 quality control, with each unit calibrated and tested to ensure accurate and reliable protection under specified operating conditions.

Regarding the Q&A on Adjustable Voltage and Current Protector

What is the difference between overvoltage and undervoltage protection?

Overvoltage protection trips when voltage rises above a safe limit (e.g., 280V), protecting equipment from insulation damage. Undervoltage protection trips when the voltage drops too low (e.g., 160V), preventing motor burnout from excessive current draw.

Can I set different trip delays for voltage and current?

Yes. The protector allows independent delay settings for overvoltage, undervoltage, and overload. For example, set a short delay (0.1s) for overvoltage and a longer delay (5s) for undervoltage to avoid nuisance tripping during brief sags.

Does the protector automatically reset after a fault?

Models with auto-reset (specify “AR” option) will attempt to reconnect power after a set delay once the fault clears. Standard models require manual reset or power cycling.

Can I use this protector for a single-phase water pump?

Absolutely. Choose the ZR-AMB 360S (1-50A range). Set the voltage range for your local grid (e.g., 180-250V) and current slightly above the pump’s running amps. This will protect against dry running (underload) and voltage fluctuations.

How do I install the current transformer (CT) for loads over 100A?

For loads above 100A, use the ZR-AMB 690P model with external CTs. Pass the main conductor through the CT, and connect the CT secondary wires to the protector’s current input terminals (ensure correct polarity).