Schneider PMR-220N7/PMR-440N7 Voltage Protector

EVR-3P44 is a direct and reliable alternative model to Schneider PMR-220N7 and PMR-440N7The function, voltage range, reset method, and installation are all compatible, and can be replaced without modification.

1、 Model positioning and substitution relationship

PMR-220N7 / PMR-440N7It's Schneider EOCR seriesThree phase phase sequence/voltage imbalance protection relay(N7 represents manual reset type), compatible with AC220V and AC440V systems respectively, with core functions ofPhase loss, reverse phase, voltage imbalanceProtection, without overvoltage/undervoltage protection.EVR-3P44For the new generation of three-phase multifunctional voltage protection relays, it integrates full functions of overvoltage, undervoltage, phase loss, reverse phase, and three-phase imbalance, with voltage coverage of 200-440V AC, covering the application scenarios of two old models, and is a standard upgrade replacement.Schneider PMR-220N7/PMR-440N7 Voltage Protector

2、 Comparison of core parameters and functions (replacement key)

1. Voltage and protection range

• PMR-220N7Three phase 160-300V AC; onlyPhase loss, reverse phase, voltage imbalance (2-15%)Protection; No overvoltage or undervoltage.

• PMR-440N7Three phase 340-480V AC; onlyPhase loss, reverse phase, voltage imbalance (2-15%)Protection; No overvoltage or undervoltage.

• EVR-3P44Three phase 200-440V AC adjustable; Adjustable overvoltage of 200-550V and undervoltage of 140-440V;Phase loss, reverse phase, three-phase imbalance (2-15%)Protect full coverage.

2. Reset and time parameters

• PMR-220N7 / PMR-440N7：Manual reset (N-type)Fixed delay of 0.1s for reverse phase, 1s for phase loss, and 5s for imbalance.

• EVR-3P44: SupportManual (N-type)/Automatic (R-type)Dual mode; The release delay is adjustable from 0.2 to 10 seconds, compatible with the delay logic of old models.

3. Accuracy and output

• PMR-220N7 / PMR-440N7Voltage accuracy ± 5%; Output 1C (SPDT) contact, AC250V/5A。

• EVR-3P44: Improved accuracy to±2%Output 1C (SPDT), AC15:2A/240V, compatible with contact capacity.

4. Installation and Dimensions

• PMR-220N7 / PMR-440N735mm rail installation.

• EVR-3P44：35mm rail/panelDual installation; Size 62 (W) × 89.5 (D) × 75 (H) mm, compatible with the installation hole position of the prototype number.

3、 Key points of replacement operation

1. Selection confirmation: Directly selectEVR-3P44-N(Manual reset type), consistent with the reset logic of PMR-220N7/PMR-440N7.

2. Parameter Settings：

• Rated voltage (VN) knob: Set 220V for 220V system and 440V for 440V system.

• Unbalance (UNB) knob: Adjust according to the original PMR setting value (2-15%).

• Overvoltage (OV) and undervoltage (UV): can be enabled or disabled as needed.

• Reset DIP: Set toN-type (manual reset).

3. wiringThree phase voltage connected to L1/L2/L3; The output contacts 95-96 (normally closed) and 95-98 (normally open) are consistent with the prototype number, and the wiring can be directly replaced.

4. debugAfter powering on, use the TEST button to self check and confirm that the PWR and TRIP indicator lights are normal and the protection action is reliable.

4、 Replacement advantage

• More comprehensive functionalityAdd overvoltage and undervoltage protection on the basis of phase sequence/imbalance for better protection.

• higher accuracy± 2% accuracy, more precise actions, reducing misoperation.

• Strong compatibilityVoltage, reset, installation, and wiring are fully compatible, without the need to modify the cabinet or wiring.

• Reliability improvementNew generation circuit design with stronger anti-interference and environmental adaptability.

  Schneider PMR-220N7/PMR-440N7 Voltage Protector
  

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EOCR, also known as Electronic Over Current Relay, is an intelligent motor comprehensive protector under Schneider Electric (formerly Sanhe, South Korea). It is used to comprehensively protect three-phase/single-phase motors from overload, phase loss, locked rotor, grounding and other faults and damages. The brand was originally owned by SAMWHA in South Korea and was acquired by Schneider Electric in 2001. It is now Schneider's core motor protection product.

Tangshan Hanya Electrical Equipment Co., Ltd. is the core agent of Schneider EOCR (formerly known as Sanhe) motor protector marketing service center in China. Responsible for the sales and technical services of products in the national market, we are a professional service provider for the national market. The company specializes in Schneider EOCR's full range of motor protection products, covering various motor protection functions such as overload, phase loss, locked rotor, three-phase imbalance, undercurrent, grounding, and reverse rotation. They are widely used in industries such as metallurgy, power, petroleum, chemical, cement, coal, and machinery manufacturing.

We provide original factory guarantees, professional selection and configuration, on-site debugging guidance, fault solutions, and after-sales support to customers across the country. With stable and reliable product quality, sufficient stock supply, and fast response services, we help customers ensure the safe operation of motor systems, reduce equipment failures, and improve operation and maintenance efficiency. We are a long-term partner in the field of industrial motor protection.